LL8 Vega GT's Junkyard Dog

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Re: LL8 Vega GT's Junkyard Dog

Postby Rickracer » Thu Nov 14, 2013 11:18 am

I'd guess about .15~.2 in the 60' , probably aabout the same in the overall ET, 8)
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ASE Master Auto Technician, 36+ years
'76 Vega Notchback, Twin Turbo 355/TH350 (soon to be a Powerglide w/Brake), 4 link, Koni Coilovers, 3.50 geared 9" w/Spool & Moser Axles, drag only, best all motor 1/8 mile pass to date, 6.90@99mph, 6.57@107.0 on a 60 shot, Best 1/4, 9.66@139.78, still tuning...
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93 S10 RCSB, Hyd. Roller Vortec head 363 ci SBC, 2800stall lockup 700R4, LS Front Brakes, Narrowed F*rd Exploder 8.8 disc brake 3.73 posi rear, 8.0s@89 mph, (all motor, haven't sprayed it yet...)and tows the Vega to the track too
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Re: LL8 Vega GT's Junkyard Dog

Postby spencerforhire » Mon Nov 18, 2013 2:08 pm

When i switched from footbraking to a trans-brake, my 60ft times dropped by .15, my 1/8 ET dropped two full tenths and around 3 tenths in the 1/4. Went from a 10.15 to a 9.85; not sure what kind of results you'll see with a car that's 2 seconds slower.
Oh, I almost forgot; don't forget to push you helmet against the back of the seat. Just about "rung my bell" the first time I let go of the button and my helmet smacked the roll bar. :wink: I had no idea the car would launch THAT much harder!
The "fleet"-
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
03 Silverado 2WD ex.cab (work truck/parts hauler)
04 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
93 Suburban- 350/4L60(retired)
00 Saturn SW2- wife's car
01 Saturn SC2- younger son's project
00 Saturn SL2- daughter's car
98 Saturn SW2- spare
and 3 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....

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Re: LL8 Vega GT's Junkyard Dog

Postby LL8 Vega GT » Tue Mar 25, 2014 9:48 am

zeke wrote:There is no video therefore it makes no sound. :lol:


Rickracer wrote:We REALLY NEED to see some video of this car at the track, :th: :th: :mrgreen: :mrgreen:


A friend found this on you tube. This is the stock 4.2 (254CI) 70k miles with dual 3-1’s headers with megaphones. (note: I have no idea who took this video -this run was embarrassing luckily I was sitting on the single)

you can hear the converter is too tight, need to adress that issue

http://www.youtube.com/watch?v=WAq89rasJ1E
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Re: LL8 Vega GT's Junkyard Dog

Postby zeke » Tue Mar 25, 2014 10:26 am

Yep! Sounds like a nasty six. :twisted: I've seen a few in my days at the track and they do sound different for sure. Nice run eh. :mrgreen:
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Re: LL8 Vega GT's Junkyard Dog

Postby NixVegaGT » Wed Mar 26, 2014 10:08 am

Dude you have infected my mind with this build. I can't stop thinking about this engine. There are a few other guys out there building with them and they just look like they've got so much potential. How does it rev? It seems like the massive 4" stroke would slow it down. Does it?? What's the throttle response like? I'm pretty much hoping you give me negative responses to these questions because I HAVE to stop thinking about this!!!
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Re: LL8 Vega GT's Junkyard Dog

Postby Monza Harry » Wed Mar 26, 2014 6:38 pm

LL8' I love the sound of flat sixes and your "JunkYard Dog's" pipes mimic them perfectly when you got her opened up! Sweet! :th: Harry P.S. Nick why should your build be completely changed only two or three times? If I had started this build version (5.X?) twenty five years ago I would have been driving mine for more than twenty of them now!
I'm not a hoarder I'm a preservationist 78 Monza Spyder (Soon To Be 2+2 with Spoilers)
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Re: LL8 Vega GT's Junkyard Dog

Postby LL8 Vega GT » Thu Mar 27, 2014 3:24 pm

NixVegaGT wrote:Dude you have infected my mind with this build. I can't stop thinking about this engine. There are a few other guys out there building with them and they just look like they've got so much potential. How does it rev? It seems like the massive 4" stroke would slow it down. Does it?? What's the throttle response like? I'm pretty much hoping you give me negative responses to these questions because I HAVE to stop thinking about this!!!


Honestly it does well, not sure all the reasons but throttle response is every bit as good as any pushrod V8/V6 I have tuned if not better. Maybe the stock compression ratio (10.5:1) and the manifold is completely dry because the injector is in the head in the intake runner portion, pointed right at the back of the intake valves helps. OHC 4 valve motors usually do good in this department. I can tell you this engine is capable of 600 HP bone stock with a turbo. We have a forum and many members if you’re interested, the cool thing about the vortec is that there are 4/5/6 cylinder versions, how cool would it be to have a 5 cylinder H-body?
Honestly give me a month, I am fairly confident there is more HP in this $200 70k mile motor via my cam timing (VVT) tuning, I will put it on the trans brake and I bet it runs an 11.9X
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Re: LL8 Vega GT's Junkyard Dog

Postby NixVegaGT » Thu Mar 27, 2014 8:59 pm

I was actually thinking about that 3.5l 5 cyl. A neighbor of mine has one in a Colorado. Pretty interesting. Is that the same family? And there's a 4 cyl? Where's the forum? I'm in for a peep or two. I was thinking of possible applications, like an old an E30 BMW or something might be fun. They've got a pretty great 6 but a bit $$$. Super compact though. This one does look pretty big. LOL! I'm interested without question. THanks dude!

**a few minutes pass**

WOW that 2.9l 4cyl looks very interesting. Pretty stout. That could be a pretty damn potent turbo engine. At this point I need to say… um. thanks? *he said unsurely* Because now I've got a whole new obsession brewing. LOL! Seriously though. Cool.
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Re: LL8 Vega GT's Junkyard Dog

Postby cosvega76 » Fri Mar 28, 2014 8:09 am

The way gas prices are staying up I've looked at the 2.8/2.9L Atlas engines, also. I'd like to find more information, like dimensions and which bellhousing pattern they use.

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Re: LL8 Vega GT's Junkyard Dog

Postby LL8 Vega GT » Fri Mar 28, 2014 10:01 am

NixVegaGT wrote:I was actually thinking about that 3.5l 5 cyl. A neighbor of mine has one in a Colorado. Pretty interesting. Is that the same family? And there's a 4 cyl? Where's the forum? I'm in for a peep or two. I was thinking of possible applications, like an old an E30 BMW or something might be fun. They've got a pretty great 6 but a bit $$$. Super compact though. This one does look pretty big. LOL! I'm interested without question. THanks dude!

**a few minutes pass**

WOW that 2.9l 4cyl looks very interesting. Pretty stout. That could be a pretty damn potent turbo engine. At this point I need to say… um. thanks? *he said unsurely* Because now I've got a whole new obsession brewing. LOL! Seriously though. Cool.


cosvega76 wrote:The way gas prices are staying up I've looked at the 2.8/2.9L Atlas engines, also. I'd like to find more information, like dimensions and which bellhousing pattern they use.

Chuck


You guys got it, the Atlas/vortec series of engines. The Colorado/canyon have 4 different options, 2 diff 4 cylinders (2.8/2.9)and 2 diff 5 cylinders(3.5/3.7 also found in hummer H3). There is only 1 version of the 6 cylinder (4.2) and was not in trucks just the SUV’s trailblazer, envoy, a saab and isuzu something or other. In fact there is some suspicion that the 5 cylinder may flow better relative to size which may make it a good option and take some length off of these behemoth 6 cylinders. I am sure you looked at the 1st page of the thread where I compared it to the SBC.

Come check out the forum (hope this isn’t against the rules) here it is http://vortec4200.com/forum1/

I always thought one of these 4 cylinders would be a great fit for a stock type vega at 185 HP is a big improvement over the factory engine and a turbo would be easy 325HP with stock motor.

Let me know what I can do to help, there are many options and solutions the members of the forum have come up with as far as trans adapters, engine mgt, intake/exhaust adapters etc. they have different bolt pattern than an SBC but luckily the dowls align to early GM trans (PG/TH350 etc) making it MUCH easier There are other cool engines such as BMW etc... i like different stuff what ever it is i think you should do it :D
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Re: LL8 Vega GT's Junkyard Dog

Postby LL8 Vega GT » Wed Sep 10, 2014 11:22 am

Ok still on the foot brake.... but i got control of the cam timing (VVT)


9/5/14

9:58 PM cam timing shut off
60" 1.831
1/4 12.840 107 MPH

10:15 PM increased overlap (add some retard) just took a stab at it, NO other changes
60" 1.724
1/4 12.247 111.16 MPH

9/6/14
3:37 PM (no changes from above just better weather)
60' 1.700
1/4 12.156 111.95 MPH


almost got the 112 mph and almost into the 1.6XX range on the 60'


I think there is more where this came from
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Re: LL8 Vega GT's Junkyard Dog

Postby waybad » Wed Sep 10, 2014 6:17 pm

well done!! nothing like making changes and they reward you with faster times!!
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Re: LL8 Vega GT's Junkyard Dog

Postby LL8 Vega GT » Fri Sep 12, 2014 4:53 pm

waybad wrote:well done!! nothing like making changes and they reward you with faster times!!

Thanks, looking for the 11.999 out of the $200 motor is the goal. then throw the boost at it and let it eat
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Re: LL8 Vega GT's Junkyard Dog

Postby LL8 Vega GT » Sun Sep 21, 2014 11:27 am

Still on foot brake

Image[/quote
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Re: LL8 Vega GT's Junkyard Dog

Postby cosvega76 » Mon Sep 22, 2014 7:41 am

:th: :th:


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