This might be a stupid question but are the 350 engines in an iroc 2 bolt or 4 bolt main? What about the engines in newer Z28s?

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> 1990 IROC-Z (black)
> one of 3000 IROCs with a 305 made in 1990
> flowmaster exhaust
system with mufler bypass
> z-28 spoiler
> blue under car neon kit
> check out my site at: http://geocities.com/thickfacek/IROC-Z.html

> email me at thickfacek@nc.rr.com

 

Dont think Chevy would give the Camaro a 4 if they gave my Vette a 2

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90 Red Convertible
100k running great
ZAINO!!!
383 Stroked.... LT4 Hot Cam... Forged Elgen Pistons Scat 9000 Crank Elgen 5.7" rods New Lifters w/ 1.6 Rockers and hardened Pushrods Super Ram Intake Hooker Headers and Y pipe into Gutted Cat with Monza Mufflers (WAY TO LOUD!!) Adj Regulator K&N Shift Kit High stall converter 160 termo, ZR1 Rims.... Red Calipers....Alpine head unit, Kenwood 6x9 4 ways, Polk DX 6 1/2 compnents, MTX 240 amp, Viper 550 alarm,


www.corvetteforum.net/c4/nomar116/

 

Just another coc|ky vette owner..


[This message has been edited by crucial (edited October 01, 2001).]

 

HAHAH

(had to post)

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to answer your question the f-bodys all had 2 bolt main.

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1991 banditt2 #130 of 600
Project 350 TPI Banditt II
http://www.street-dawg-racing.cityslide.com
www.gcfba.com (Greater Cincinnati F-Body Association)
http://www.cincyspeed.com/

 

And to further explain this issue... All Corvettes had 4 bolt main blocks. That's okay though, MY Fbody has a 4 bolt main block in it now. lol

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1991 Z28

 

Nomar116 is correct, ALL L98s (except factory flukes) had 2 bolt mains including the ones used on Vettes.

 

wrong. the only L98 vette to have a 4 bolt main was the B2K callaway twin turbo vette. LT1 is a different story. all LT1 vette motors are 4 bolt main caps, while f-body LT1s use a 2 bolt main caps.

[This message has been edited by u r sofa king we tah did (edited October 02, 2001).]

 

and your comment about the c*cky vette owner was uncalled for. just because you see someone with a vette doesnt mean they are a *****.

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1989 Chevy Camaro IROC-Z L98 A4 Black Ext./Grey Int.
SDPC2000 H.O. TPI Crate Engine
2.77:1 Gears

1989 Chevy Corvette L98 A4 Black/Black Coupe
Stock 95k miles
3.07:1 Gears

the vette is faster, i guess due to wieght and gearing.

 

That is not true my 4-bolt block came out of a 90 regular old run of the mill vette. For some reason some of the vettes came with the 4-bolt and some came with 2-bolts.I don't know why they did this.

 

So if you where on a budget and wanted to rebuild with a bullet proof bottom is it good to us a truck block (4-bolt).


I know if money was not a prob it would be a short block ZZ4, but money is tight so would a truck block with the usuall treatment to it when rebuilding be just as good?

What makes the ZZ4 that much better???

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1989 Trans Am GTA - Flame Red Metallic, L98 5.7L TPI, TH700-R4, T-Tops, 3.27, 9-bolt rear, dual cat
- K&N Air & Oil Filter
- Dynomax muffler

1992 Camaro RS - Hawaiian Orchid, LO3 5.0L TBI, T-5, T-Tops, 3.08, 10-bolt rear - Sold
- K&N Air & Oil Filter
- L69 Dual Snorkel

 

actually, the twin turbo callaway block is a worked over 4 bolt truck block. thats odd if your stock engine is a 4 bolt block, maybe at some point they were running low on blocks at the vette plant and used some 4 bolt blocks from somewhere else. kinda strange. i asked a guy at SDPC2000 and he said that all stock L98s are two bolts.

 

I used a Vortec truck ('97) 4-bolt block on my rebuild and used it's nodular iron crankshaft as well. Vortec truck blocks are very nice and are the exact same casting as a ZZ4 block. The ZZ4 is really a Vortec shortblock with a steel crank, different rings, Hyp. pistons, and PM rods. The actual blocks are identical. So unless you really want the internals that are in a ZZ4 shortblock, it would make sense to use a truck block and get your own (better) internals. I am also pretty sure that the later TBI truck 4-bolt blocks are the same as the Vortec blocks if they are mid-'89 and newer (roller cam).

Good Luck


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1987 GTA L98 MD8
355, TFS Heads, LT4 Hot Cam
My GTA

The Minnesota F-body Club