The 151 is worthy I think?

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Postby Vega75randy » Sun Feb 17, 2008 12:45 am

Ok guy's stop thinking small. Get the 181cid marine engine and turbo it. Still 4 cylinders but more cubes. A guy on the Inliners web site has turbo exhaust manifolds for these. If you need a new head they are making them right here in the USA. Yes, you need to find someone with a plasma cutter (unless you already own one) and cut the oil pan around the rails and turn it around to make a rear sump but, SO WHAT!!!!!!!!!!!! With a little huff and puff this could be a 375hp or more engine. (SBC territory) Gutted interior and some sticky tires you could beat a lot of V8 cars of all varieties. :D
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Postby HI WINDING MONZA » Sun Feb 17, 2008 2:19 am

Randy, I think the 153 Nova oil pan would work? But would the rods and pistons hold up ? Doug in Az 8)
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Postby res0o7eb » Sun Feb 17, 2008 4:39 pm

Randy,
Believe me, I am listening to you. I have done a little research on the 181 cu. in. "Mercruiser" since you last mentioned it.
Link to a post about the 140 HP, 3.0L - 181CI, cylinder head (casting #2776954):
http://www.everythingboats.com/boatbuil ... ?read=7461
Here's a link to a head : $527
http://www.marineengine.com/parts/sierr ... a00665.htm
Another link to a head : $550
http://www.marineengineparts.com/shopsi ... age30.html
Found this site on vintage midget racing:
http://www.vintagegarage.com/midget.html

Considering the Seattle area is big on boating, I'll bet there are a few of these motors lying around.
Here's a local marine shop with a presence on ebay:
http://stores.ebay.com/Marine-Boating-Goods
Here's another local engine shop:
http://usengine.us/

Here's an exhaust manifold on ebay:
http://cgi.ebay.com/ebaymotors/ws/eBayI ... 0199938094
Image

I also didn't realize how inexpensive NEW turbos are. So many choices.
Yeah, I am thinking about it. Megasquirt and an intercooler, too. I need to get a little smarter on the technology.
I think my Sunbird is the perfect 'canvas' for this swap/add-on.
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Marine 181cid & Turbo

Postby Vega75randy » Mon Feb 18, 2008 7:07 pm

Doug; the new engines are 1 pc rear mains older stuff will not work except to cut the rails off and weld it to the new pan rails. As far as rods and such, I don't know if the have the same rod pin diameter as the small block but powder/metal rods narrowed to fit would take some abuse. The older inlines have 2.00" pins but these just might have the SBC 2.10" pins. Also they came from the factory with an 11"/163 thooth fly wheel.

res0o7eb; the manifold is made in Brazil. VERY good quality casting! Tom Lowe is the man behind these eBay finds. New heads are made to very exacting quality standards so they should hold up to lots of abuse and they don't have siamesed ports. If ya need flow remember, they can take 2.05" dia intake valves just like the V8 SBC since it too has 4.00" bores.

like I've said, I'd be doing this too if it were not for having 2 V6's for my Vega. (yea, I still have it)
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Postby spyder_xlch » Mon Feb 18, 2008 8:14 pm

We had a customer at our garage give us an "Iron Duke" marine engine for scrap. The block had been welded before. My boss kept the pistons because they were flat tops and he's going to put them in his S-10 2.5. I wonder if that might have been a 181? What's the difference, bore, stroke, both? I wish I would have had this info before because the rest of the engine is long gone now.
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Postby res0o7eb » Mon Feb 18, 2008 10:47 pm

Matt,
The 181 is a 151 stroker engine. Same 4.00" bore.
The stroke is increased from 3.00" to 3.60".
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Postby spyder_xlch » Mon Feb 18, 2008 11:39 pm

If that engine was a 181 and my boss puts the pistons in his 151 that should lower the compression to about 5:1:lol: Should have checked the stroke. I asked if he wanted to keep the crank but he said he had a few good cranks. Oh well.
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Postby res0o7eb » Fri Feb 22, 2008 3:27 pm

... we can help! :lol:
http://remanufactured.com/Inboard_Marine_Engines.htm
Here's a performance-built 181 cu.in marine longblock for $2690 + shipping! No core charge.

Image
Image
Image
Image

They don't show the port side of the head, but they mention that they have three types available:
Image
The one on the LEFT is the pre-1991 big port - and therefore, desirable - head.
Valve sizes are 1.94 Intake and 1.60 Exhaust!
Last edited by res0o7eb on Tue Nov 23, 2010 7:27 am, edited 2 times in total.
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Postby spyder_xlch » Fri Feb 22, 2008 5:22 pm

The short block that was given to my boss looked just like that. It had the "ribbing" on the bell housing area. Did the 151 have that?
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Postby HI WINDING MONZA » Sun Feb 24, 2008 12:55 am

Tom , I'd ask them how much HP that performance motor makes. Doug in AZ 8)
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Postby hammerdown7 » Fri Mar 07, 2008 2:27 pm

Here's a link to a Super Duty build thread on the Fiero site,

http://www.fiero.nl/forum/Forum2/HTML/055858.html

Dick
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Postby Sirshredalot » Mon Mar 10, 2008 10:44 pm

I have access to a few 181 cores....I have a buddy that works on fork lifts and they run them in those....I think they have steel cranks too.

Hes got 3 just sitting around and I thought about this thread when we where pulling a motor out of a fork lift.

Im sure with the right rod combo you could use a regular 350 or 383 piston and ring set forthe rebuild....the bottom end is all 151...duno what the rod length is though because the 181 uses the same pistons and crank as the 151.

I also have an old turbo sitting around and was thinking real hard about it.

If someone is interested....i could talk to him....probably $100 or so.

God bless
-Shred
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Postby Tailssideup » Mon Mar 10, 2008 11:13 pm

What kind of turbo?
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Postby Sirshredalot » Mon Mar 10, 2008 11:38 pm

Old mitsu teo4h...

Not many people want them because theyre so small, but i think itd be ok for use on a low rpm motor.

Rebuild kits are cheap so I was thinking of puting together a turbo 3.0 4cyl....somthing low boost(4-5 psi)...just for fun.

Need a turbo?

God bless
-Shred
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Postby Tailssideup » Tue Mar 11, 2008 12:59 am

Im probably gonna need a turbo soon. But I just got an offer I really dont want to refuse. A 2.2 Ecotec with wiring harness and computer, pulled for 550, with only 24000 miles on it. Slap in Sunbird, get Solstice trans and figure out hydrolics and bam I have a pretty good starting point for modifications.
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