From: chevylite_REMOVE_319172_THIS_@yahoo.com
Duke, you are absolutely right on the exhaust and
its effects.
I ran a 2 1/2 inch exhaust on mine
using all fittings for the bends and mig welding the
joints. These fittings were what I call true mandrel
bent. There is no ovality lose in the bends whatsoever.
And it made considerable difference in performance.
It's not easy to get the exhaust in there, but it can
be done, and neatly. I said it was like running an
exhaust on a boat.
I have the fitting numbers for
the 90's. One is an unfinished steel short 90 by
walker, 41002. The other is aluminized and the only name
I saw on the label was "Questor", # 8672. I'm not
sure what gauge, but they are heavy duty. I also used
a couple 45's but don't have the number. I used all
aluminized and I had to have them all special ordered, but,
they can be obtained. I can't help in the muffler
dept. I was using a Supertrapp. It worked great, I just
never was completely happy with the looks of it, out
the back of the Vega.
I would be interested in
participating if orders were needed to obtain a manufacturer,
if true mandrel bent was used. But I'd be suprised
if it could be bent in one piece.
Also, It's
just a guess but I doubt that a Saturn has an exhaust
manifold or header as efficient as the Cosworth's. Many
cars are restricted right there. Another attribute to
the head: How many cars can you look in the carbs ( I
have Webers) and see the piston?!!!!
Mike
[This is message #705 by user chevylite on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Fri Jan 21, 2000 11:14 pm
From: chevylite_REMOVE_360512_THIS_@yahoo.com
I don't understand why all of
the exhaust
systems discussed begin at the catalytic converter. I
don't see the crossover piece as a compliment to that
fine header.
As I mentioned earlier, I ran the
exhaust on my Coz powered GT that I autocrossed.
Street
Prepared mandates an exhaust system w/muffler. And, I,
mandate that my car has to look good. I just could'nt
bring myself to dump the exhaust in front of the back
tire. So I knew that if it were to run to the back, it
had to be free as possible. I started at the header
flange. I made
a template and cut a piece of 1/4 inch
plate. To
make the transition to round pipe I used a
3 1/2 or 4 inch piece (whichever one worked
perfect) of pipe about a foot long. I put one end in the
vise and made an oval. A little working with a
ballpeen and it worked great. Once that was right I cut it
off at an angle at the right length to mate the piece
running across.
Some cutting and fitting and cutting
and fitting and this can be tucked nicely tight up to
the bellhousing. From there using about 14 fittings
(combination of 45's and 90's) and I exited at the bumper with
a Supertrapp muffler. I used the true mandrel bent
fittings. There was no ovality differences in the entire
exhaust, 2 1/2 from start to finish. It worked great.
Those
motors really like to breath. If I could have picked the
car up, I would have had one hell of
a leaf
blower.
I've been listening to the muffler statements with
much interest. The car was used exclusively as an
autocrosser. But now I'm putting it back into street trim.
I'll be putting an exhaust system on soon, and will be
using a transverse muffler. I really like the dual
outlet concept with pipes out both sides. I wish ya'll
would hurry up and decide which one is best!! IF
coswurth (david)'s hunch is true, that using antique
plates excludes your car from yearly inspections, I'll
probably run my exhaust again myself, minus the converter
and using the muffler that you guys recommend. You
can't trust muffler shops to run them. I've seen many
of them cut pipe off and not even deburr
it.
thanks for the muffler tips and numbers guys
Mike
[This is message #717 by user chevylite on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
I don't understand why all of
the exhaust
systems discussed begin at the catalytic converter. I
don't see the crossover piece as a compliment to that
fine header.
As I mentioned earlier, I ran the
exhaust on my Coz powered GT that I autocrossed.
Street
Prepared mandates an exhaust system w/muffler. And, I,
mandate that my car has to look good. I just could'nt
bring myself to dump the exhaust in front of the back
tire. So I knew that if it were to run to the back, it
had to be free as possible. I started at the header
flange. I made
a template and cut a piece of 1/4 inch
plate. To
make the transition to round pipe I used a
3 1/2 or 4 inch piece (whichever one worked
perfect) of pipe about a foot long. I put one end in the
vise and made an oval. A little working with a
ballpeen and it worked great. Once that was right I cut it
off at an angle at the right length to mate the piece
running across.
Some cutting and fitting and cutting
and fitting and this can be tucked nicely tight up to
the bellhousing. From there using about 14 fittings
(combination of 45's and 90's) and I exited at the bumper with
a Supertrapp muffler. I used the true mandrel bent
fittings. There was no ovality differences in the entire
exhaust, 2 1/2 from start to finish. It worked great.
Those
motors really like to breath. If I could have picked the
car up, I would have had one hell of
a leaf
blower.
I've been listening to the muffler statements with
much interest. The car was used exclusively as an
autocrosser. But now I'm putting it back into street trim.
I'll be putting an exhaust system on soon, and will be
using a transverse muffler. I really like the dual
outlet concept with pipes out both sides. I wish ya'll
would hurry up and decide which one is best!! IF
coswurth (david)'s hunch is true, that using antique
plates excludes your car from yearly inspections, I'll
probably run my exhaust again myself, minus the converter
and using the muffler that you guys recommend. You
can't trust muffler shops to run them. I've seen many
of them cut pipe off and not even deburr
it.
thanks for the muffler tips and numbers guys
Mike
[This is message #717 by user chevylite on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Sat Jan 22, 2000 12:22 am
From: doctorduke_REMOVE_369698_THIS_@yahoo.com
An improved crossover pipe would probably be
beneficial, but few of us have the equipment and skill to
fabricate our own systems. Based on my own dyno tests we
are losing at least 35 horsepower between the end of
the crossover pipe and the tail pipe exit. I've been
trying to develop a "business case" for a CVOA sponsored
co-op exhaust system, and obviously cost is a
big
issue. If we can get back 20 to 25 of those lost
horsepower for under $300, then it is the most bang for the
buck anyone has ever had. To have the broadest appeal,
I believe the system should be OEM quality (i.e.
aluminized tubing), look approximately like the original,
and bolt to the production mounts with common hand
tools. As you describe, the crossover pipe is a faily
complex piece and for longevity it should as a minimum be
aluminized. I think and improved crossover would add about a
hundred dollars to the system because of all the
fabrication labor, and nobody has any OBJECTIVE data on the
benefits. Your testimonials as to the "seat of the pants"
improvements may go a long way to getting everyone to wake up
and smell the coffee and figure out what it takes to
get USABLE horsepower from this engine, and stop
wasting money on Weber carburetors (more torque, but less
top end power), cams (maybe more power, but kills ALL
the torque), and turbos (a VERY expensive thermite
grenade).
doctorduke
[This is message #719 by user doctorduke on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
An improved crossover pipe would probably be
beneficial, but few of us have the equipment and skill to
fabricate our own systems. Based on my own dyno tests we
are losing at least 35 horsepower between the end of
the crossover pipe and the tail pipe exit. I've been
trying to develop a "business case" for a CVOA sponsored
co-op exhaust system, and obviously cost is a
big
issue. If we can get back 20 to 25 of those lost
horsepower for under $300, then it is the most bang for the
buck anyone has ever had. To have the broadest appeal,
I believe the system should be OEM quality (i.e.
aluminized tubing), look approximately like the original,
and bolt to the production mounts with common hand
tools. As you describe, the crossover pipe is a faily
complex piece and for longevity it should as a minimum be
aluminized. I think and improved crossover would add about a
hundred dollars to the system because of all the
fabrication labor, and nobody has any OBJECTIVE data on the
benefits. Your testimonials as to the "seat of the pants"
improvements may go a long way to getting everyone to wake up
and smell the coffee and figure out what it takes to
get USABLE horsepower from this engine, and stop
wasting money on Weber carburetors (more torque, but less
top end power), cams (maybe more power, but kills ALL
the torque), and turbos (a VERY expensive thermite
grenade).
doctorduke
[This is message #719 by user doctorduke on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Sat Jan 22, 2000 1:57 am
From: chevylite_REMOVE_897809_THIS_@yahoo.com
Duke-
School me about the webers being a waste
of money. I have no experience with the fuel
injection. I bought 2950 with the fuel injection in place.
I'd always heard about the "Cosworths", but had never
seen one. I had built numerous 140's in my years with
the Vegas. I knew how to make a 140 run good. I test
drove the Coz expecting something at least as quick as
my GT, and was very disappointed to say the least
considering the reputation I had heard. Note..the headers
sold me. I was sold as soon as I popped the hood and
saw those beauties. Anyway, the guy included a brand
new hutton setup with the car. Within a couple weeks
I tryed them and could not believe the difference.
So how are you getting this great power from the
injection? You are'nt reprogramming the "computer" are
you?
Mike
[This is message #721 by user chevylite on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
Duke-
School me about the webers being a waste
of money. I have no experience with the fuel
injection. I bought 2950 with the fuel injection in place.
I'd always heard about the "Cosworths", but had never
seen one. I had built numerous 140's in my years with
the Vegas. I knew how to make a 140 run good. I test
drove the Coz expecting something at least as quick as
my GT, and was very disappointed to say the least
considering the reputation I had heard. Note..the headers
sold me. I was sold as soon as I popped the hood and
saw those beauties. Anyway, the guy included a brand
new hutton setup with the car. Within a couple weeks
I tryed them and could not believe the difference.
So how are you getting this great power from the
injection? You are'nt reprogramming the "computer" are
you?
Mike
[This is message #721 by user chevylite on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Sat Jan 22, 2000 9:38 am
From: markarock_REMOVE_716354_THIS_@yahoo.com
Here's my take on the EFI/weber "controversy".
The engine wants a "proper" (i.e. stochiometrically
accurate) fuel/air mixture. Any induction system which
provides it will allow it to run. To rev high, the system
needs "capacity", which we label "cfm", or cubic feet
per minute of airflow. As I recall the stock EFI
system has the capbility to satisfy engines up to 190
hp--it will flow enough air, and can provide sufficient
lbs/hr of fuel flow. It also has the ability to
accurately measure and deliver fuel over the rpm range,
thereby providing optimum fuel/air ratios over that
range. This is a function of the placement and angle of
the injectors, the fuel curve, the spray pattern, the
timing of the injector pulses, etc. as well as the
design of the intake manifold and runners. Generally
speaking, if webers perform "better" than the stock EFI, it
is because the EFI was running lean. Set both
systems up to their optimum, and they will deliver
essentially equal performance, but the webers will be
significantly louder, here in the cold north you will have to
fiddle with a choke, you will need to periodically
balance them, and you will not pass emissions because
they are not stock and perhaps because they run
richer. On the other hand, they do look neat.
[This is message #722 by user markarock on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
Here's my take on the EFI/weber "controversy".
The engine wants a "proper" (i.e. stochiometrically
accurate) fuel/air mixture. Any induction system which
provides it will allow it to run. To rev high, the system
needs "capacity", which we label "cfm", or cubic feet
per minute of airflow. As I recall the stock EFI
system has the capbility to satisfy engines up to 190
hp--it will flow enough air, and can provide sufficient
lbs/hr of fuel flow. It also has the ability to
accurately measure and deliver fuel over the rpm range,
thereby providing optimum fuel/air ratios over that
range. This is a function of the placement and angle of
the injectors, the fuel curve, the spray pattern, the
timing of the injector pulses, etc. as well as the
design of the intake manifold and runners. Generally
speaking, if webers perform "better" than the stock EFI, it
is because the EFI was running lean. Set both
systems up to their optimum, and they will deliver
essentially equal performance, but the webers will be
significantly louder, here in the cold north you will have to
fiddle with a choke, you will need to periodically
balance them, and you will not pass emissions because
they are not stock and perhaps because they run
richer. On the other hand, they do look neat.
[This is message #722 by user markarock on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Thu Jan 27, 2000 3:21 am
From: denisst78_REMOVE_919919_THIS_@yahoo.com
Has a side note
when using a single
inlet
dual outlet muffler use
only one that have the 2
outlets
on the same side
if you look at a camaro
running
at idle you`ll see that the driver
side pipe flow
a lot more
(this is due to the internal
design)
lots of company arte selling good
flowing mufflers
whit 2 outlets for
imports cars
maybee one of
those could fit your
vega bodies
you could also
use Dynomax 17740
it have a 3 inchs inlet(just
make an adaptor)
and 2 2 1/4 outlets
the case
lenght is 20 inchs
Denis
[This is message #776 by user denisst78 on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
Has a side note
when using a single
inlet
dual outlet muffler use
only one that have the 2
outlets
on the same side
if you look at a camaro
running
at idle you`ll see that the driver
side pipe flow
a lot more
(this is due to the internal
design)
lots of company arte selling good
flowing mufflers
whit 2 outlets for
imports cars
maybee one of
those could fit your
vega bodies
you could also
use Dynomax 17740
it have a 3 inchs inlet(just
make an adaptor)
and 2 2 1/4 outlets
the case
lenght is 20 inchs
Denis
[This is message #776 by user denisst78 on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Mon Sep 04, 2000 10:21 pm
From: cstwcam_REMOVE_460221_THIS_@yahoo.com
Duke in the same camaro catalog they also have a
83-92 high preformance super turbo exhaust system there
are three different intermediate pipes all 2 1/2 inch
one for 86-92 one 84-85 and the last 83-89, if the
cat. is in the same location ie outlet in same general
direction would it be possible to use one of these
intermediate pipes by cuting a section out flaring and putting
back together, it does go over the rear axle what do
you think. The price depending on which one is 99.00,
109.50 or 119.45
I have not looked into what it would
cost for a 2 1/2 to be made but this may be a
altnative.
Art
[This is message #3178 by user cstwcam on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
Duke in the same camaro catalog they also have a
83-92 high preformance super turbo exhaust system there
are three different intermediate pipes all 2 1/2 inch
one for 86-92 one 84-85 and the last 83-89, if the
cat. is in the same location ie outlet in same general
direction would it be possible to use one of these
intermediate pipes by cuting a section out flaring and putting
back together, it does go over the rear axle what do
you think. The price depending on which one is 99.00,
109.50 or 119.45
I have not looked into what it would
cost for a 2 1/2 to be made but this may be a
altnative.
Art
[This is message #3178 by user cstwcam on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Tue Oct 31, 2000 9:46 pm
From: elvish1_REMOVE_393662_THIS_@yahoo.com
All:
Things are finally cooling down here in
Texas. In a few weeks I will run the 75 down and dyno
test the finished exhaust system. I will post the
results, before and after the mods. The Burns stainless
collector fit quite nicely in the stock positon and bolts
to the stock header. I finished up with a
Supertrapp, and it sounds killer..
Doug
[This is message #3563 by user elvish1 on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
All:
Things are finally cooling down here in
Texas. In a few weeks I will run the 75 down and dyno
test the finished exhaust system. I will post the
results, before and after the mods. The Burns stainless
collector fit quite nicely in the stock positon and bolts
to the stock header. I finished up with a
Supertrapp, and it sounds killer..
Doug
[This is message #3563 by user elvish1 on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Tue Jun 05, 2001 9:27 am
From: farradio_REMOVE_808734_THIS_@yahoo.com
I want to redo my exhaust for best performance and sound..Any tips
Al
[This is message #5644 by user farradio on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
I want to redo my exhaust for best performance and sound..Any tips
Al
[This is message #5644 by user farradio on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Tue Jun 05, 2001 5:12 pm
From: elvish1_REMOVE_491901_THIS_@yahoo.com
Al
Here is a link to the mod's I have
performed. They are not stock looking, but are not too ugly
:)
<a href=http://home.swbell.net/cos75/page9.html target=new>http://home.swbell.net/cos75/page9.html</a>
<a href=http://home.swbell.net/cos75/page14.html target=new>http://home.swbell.net/cos75/page14.html</a>
Doug in Texas
[This is message #5652 by user elvish1 on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
Al
Here is a link to the mod's I have
performed. They are not stock looking, but are not too ugly
:)
<a href=http://home.swbell.net/cos75/page9.html target=new>http://home.swbell.net/cos75/page9.html</a>
<a href=http://home.swbell.net/cos75/page14.html target=new>http://home.swbell.net/cos75/page14.html</a>
Doug in Texas
[This is message #5652 by user elvish1 on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Wed Jun 06, 2001 9:03 am
From: farradio_REMOVE_304009_THIS_@yahoo.com
Doug,
Thanks looks great...You got a wild little car..Way cool
Al
[This is message #5662 by user farradio on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
Doug,
Thanks looks great...You got a wild little car..Way cool
Al
[This is message #5662 by user farradio on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Mon Jul 23, 2001 8:48 am
From: farradio_REMOVE_351342_THIS_@yahoo.com
I am in the process of a redo of exhaust system..My state has no emissions for cars over 25 years ...and I am interested in the best way to redo system.
Al
[This is message #6309 by user farradio on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
I am in the process of a redo of exhaust system..My state has no emissions for cars over 25 years ...and I am interested in the best way to redo system.
Al
[This is message #6309 by user farradio on Yahoo! Club Cosworth Vegas: http://clubs.yahoo.com/clubs/cosworthvegas ]
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Exhaust
by h-bot » Thu Oct 17, 2002 7:01 am
From: cosworth0078_REMOVE_511354_THIS_@yahoo.com
I read somewhere that replacing the stock Cosworth Vega exhaust (from
the header "collector" on back with a 2-1/2" ID tubing with mandrel
bends is the ideal set up. Well, none of the shops I found are able
to do mandrel bends and they also tell me that anything over 2-1/4"
ID tubing will cause clearance problems going over the rear axle (to
retain the stock look). I recently replaced the stock catalytic
converter with a new modern unit (just to remove THAT restriction was
$200) and while it seems to give me more power, I do not like the
louder sound that came with it. What is a Cosworth owner to do?
Clark
[This is message #9537 by user cosworth0078 on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
I read somewhere that replacing the stock Cosworth Vega exhaust (from
the header "collector" on back with a 2-1/2" ID tubing with mandrel
bends is the ideal set up. Well, none of the shops I found are able
to do mandrel bends and they also tell me that anything over 2-1/4"
ID tubing will cause clearance problems going over the rear axle (to
retain the stock look). I recently replaced the stock catalytic
converter with a new modern unit (just to remove THAT restriction was
$200) and while it seems to give me more power, I do not like the
louder sound that came with it. What is a Cosworth owner to do?
Clark
[This is message #9537 by user cosworth0078 on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
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Exhaust
by h-bot » Thu Oct 17, 2002 7:06 am
From: buddyleejjc2_REMOVE_957164_THIS_@yahoo.com
--- In <a href="/group/cosworthvegas/post?protectID=219233066105193209050199029077192253163098100046209130">cosworthvegas@y...</a>, cosworth0078 <<a href="/group/cosworthvegas/post?protectID=091233212180056219138097203245129208071">no_reply@y...</a>> wrote:
> I read somewhere that replacing the stock Cosworth Vega exhaust
(from
> the header "collector" on back with a 2-1/2" ID tubing with
mandrel
> bends is the ideal set up. Well, none of the shops I found are
able
> to do mandrel bends and they also tell me that anything over 2-1/4"
> ID tubing will cause clearance problems going over the rear axle
(to
> retain the stock look). I recently replaced the stock catalytic
> converter with a new modern unit (just to remove THAT restriction
was
> $200) and while it seems to give me more power, I do not like the
> louder sound that came with it. What is a Cosworth owner to do?
> Clark
Clark, get ear plugs, LOL :)
Later,
John J. Cowall
[This is message #9538 by user buddyleejjc2 on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
--- In <a href="/group/cosworthvegas/post?protectID=219233066105193209050199029077192253163098100046209130">cosworthvegas@y...</a>, cosworth0078 <<a href="/group/cosworthvegas/post?protectID=091233212180056219138097203245129208071">no_reply@y...</a>> wrote:
> I read somewhere that replacing the stock Cosworth Vega exhaust
(from
> the header "collector" on back with a 2-1/2" ID tubing with
mandrel
> bends is the ideal set up. Well, none of the shops I found are
able
> to do mandrel bends and they also tell me that anything over 2-1/4"
> ID tubing will cause clearance problems going over the rear axle
(to
> retain the stock look). I recently replaced the stock catalytic
> converter with a new modern unit (just to remove THAT restriction
was
> $200) and while it seems to give me more power, I do not like the
> louder sound that came with it. What is a Cosworth owner to do?
> Clark
Clark, get ear plugs, LOL :)
Later,
John J. Cowall
[This is message #9538 by user buddyleejjc2 on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
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Exhaust
by h-bot » Thu Oct 17, 2002 11:37 am
From: cstwcam_REMOVE_514149_THIS_@yahoo.com
--- In <a href="/group/cosworthvegas/post?protectID=219233066105193209050199029077192253163098100046209130">cosworthvegas@y...</a>, cosworth0078 <<a href="/group/cosworthvegas/post?protectID=091233212180056219138097203245129208071">no_reply@y...</a>> wrote:
> I read somewhere that replacing the stock Cosworth Vega exhaust
(from
> the header "collector" on back with a 2-1/2" ID tubing with
mandrel
> bends is the ideal set up. Well, none of the shops I found are
able
> to do mandrel bends and they also tell me that anything over 2-1/4"
> ID tubing will cause clearance problems going over the rear axle
(to
> retain the stock look). I recently replaced the stock catalytic
> converter with a new modern unit (just to remove THAT restriction
was
> $200) and while it seems to give me more power, I do not like the
> louder sound that came with it. What is a Cosworth owner to do?
> Clark
Clark did you hear my car at the round up it was the black Cosworth
lol white interior 16 valves on the license plate. I have 2.5
exhaust from converter back there are pictures in the photo section
under 1105 of the complete system. They did not put a real high flow
dyno max on it but it does go better than stock and I really like
the way it sounds it has a deep tone expecially if you keep the RPM
around 2000 when driving it quiets down as RPM's come up.
Art
[This is message #9540 by user cstwcam on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
--- In <a href="/group/cosworthvegas/post?protectID=219233066105193209050199029077192253163098100046209130">cosworthvegas@y...</a>, cosworth0078 <<a href="/group/cosworthvegas/post?protectID=091233212180056219138097203245129208071">no_reply@y...</a>> wrote:
> I read somewhere that replacing the stock Cosworth Vega exhaust
(from
> the header "collector" on back with a 2-1/2" ID tubing with
mandrel
> bends is the ideal set up. Well, none of the shops I found are
able
> to do mandrel bends and they also tell me that anything over 2-1/4"
> ID tubing will cause clearance problems going over the rear axle
(to
> retain the stock look). I recently replaced the stock catalytic
> converter with a new modern unit (just to remove THAT restriction
was
> $200) and while it seems to give me more power, I do not like the
> louder sound that came with it. What is a Cosworth owner to do?
> Clark
Clark did you hear my car at the round up it was the black Cosworth
lol white interior 16 valves on the license plate. I have 2.5
exhaust from converter back there are pictures in the photo section
under 1105 of the complete system. They did not put a real high flow
dyno max on it but it does go better than stock and I really like
the way it sounds it has a deep tone expecially if you keep the RPM
around 2000 when driving it quiets down as RPM's come up.
Art
[This is message #9540 by user cstwcam on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]
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