'91 9C1 rebuild.....

[kdrolt]

The 350 used in the 9C1 was no different than the 350 used in the passenger cars. The 350 was one of the most popular GM engines, so there is nothing about a 350 LO5 that would require special pistons. The LO5 9C1 version of the 350 had the L98 cam, it had a slightly better exhaust, it had alrger fuel injectors... and all that resulted in a boost from 180 fwhp to 205 fwhp. But the long block of the engine, copcar 9C1 or the old passenger car engine in grandpa's Buick --- they were the SAME.

If you have to rely on a parts sales person at Summit for that kind of info then you probably shouldn't be rebuilding an engine. You need to do more research on the web before relying on counter or phone help.

[corning_d3]

First off, your an asshole, so I don't want to see any more posts from you. Secondly, I've been SUCCESSFULLY building engines for 10 years now(I started when I was 16). Thirdly, I don't feel like dropping that much money on something that may not work, according to a well known GM service tech.

[capriceowns]

I wouldnt mind the trans. <_< got a price your asking for it?

[corning_d3]

Gimme a month, I'm tryin' to sell the whole car if I can't get confirmation on the rebuild project. If I decide not to rebuild or it doesn't sell, I'll part it out. I figure it'll be ridiculously cheap for a hi-po slushbox..

[corning_d3]

Originally Posted by kdrolt

The 350 used in the 9C1 was no different than the 350 used in the passenger cars. The 350 was one of the most popular GM engines, so there is nothing about a 350 LO5 that would require special pistons. The LO5 9C1 version of the 350 had the L98 cam, it had a slightly better exhaust, it had alrger fuel injectors... and all that resulted in a boost from 180 fwhp to 205 fwhp. But the long block of the engine, copcar 9C1 or the old passenger car engine in grandpa's Buick --- they were the SAME.

If you have to rely on a parts sales person at Summit for that kind of info then you probably shouldn't be rebuilding an engine. You need to do more research on the web before relying on counter or phone help.

I would like to apologize to you... I totally agree with you, as does most other people I've spoken to. I don't see how a small block 350 could be anything but a 350, but after hearing all this other crap about $100 a piece pistons and corvette this and oil ring groove that, I can't afford to lay down the amount of cash I planned out on a non-refundable hope-and-guess. BUT, the way you said the last part hit me wrong after being in class working on junk all day, then going to work and working on more junk. I tend to get a little(understatement) touchy when I'm super-stressed, but I'm mellow now so..sorry.

[kdrolt]

About the only differences in TBI 350s that come to mind would be dished pistons (for lower CR) in a C/K/G truck engine vs eyebrow (valve relief) pistons on the passenger car. The dished pistons reduced the CR for detonation resistance in the face of heavier engine loads, as well as perhaps for lower octane requirements. Camaros got 2 bolt main L98 350s using 083 casting heads and the 773 cam; Caprice/Roadmaster/CustomCruiser also got the same 2 bolt block with swirl port 193 castings with the "peanut" cam. The Caprice 9C1 got the same 2 bolt engine but using the 773 cam.

The Corvette 350 (L98) was a 4 bolt main iron block (probably the same block as the truck) only the trucks were flat tappet (at least until 1994-1995 when there may have been carryover to the roller lifters) and the Vette got roller lifters (just like all GM v8s from 1988+). I don't think there was anything special about the Vette long block other than the 773 cam and the 113 casting number aluminum heads. The only special Vette engine of that era would be the dohc LT5 from the ZR-1 ... and I don't think there was any parts carryover between it and the L98.

If I really wanted to drive this nail home (and I don't), I would go looking for the GM part numbers for the main engine components in the Parts & Illustration book for the 1991-1993 models and then compare the std Caprice o the ones used for the 9C1 Caprice and for the Camaro and Corvette L98s. I'll bet the bearings, rods, pistons, rings etc are the same..... so the long block engines would only differ by the cam & heads.

A generic 350 rebuild kit ought to work fine for what you are doing. You don't need anything really fancy unless you are aiming for big power/abuse. And even if you aim for something better than stock (195 fwhp in 1991, 205 for 92-93) you will still need some custom ECM chip work to make it run well as all loads and speeds.

[enginefixerman]

Hi
You can either replace your pistons with "standard style" 350 pre-86 or you can use the right rings from hastings, vin K "shallow oil groove" style.

http://www.fastengineparts.com/products.php?mid=12