HEllo guys.
I am making some plans for this comming up winter. Id like to do some serious internal work on my car. I will be taking all motor apart. I have my camshaft already its a 581./581. lift cam. Now the big part. Id like to bore out my block to 382ci. My question is... is it possible to do without getting a stroker kit?
I mean ive seen some set up like that ...but never had chance to talk to the guy. IT was a ALL-BORE LS1 382ci. Also my stock heads ...is it worth porting them out ? or just get some LS6 heads and port those out ?
This is my project for this winter... 382ci...cam..heads..
I will be doing all work myslef as far as taking everything a part and put it back together.. I dont want to spend to much money on all that..
Any ideas and suggestions about how to get it done the right and not VERY expensive way (if possible :P) are appreciated !
Thank You !

 

i don't think you can do an all bore 382ci on a stock ls1 block...maybe the 6.0L truck block.

considering a .030 overbore only picks up like 5ci...it would take alot more to reach 382ci without stroking.

 

Yes, new sleeves and a 4.1" bore with the stock stroke yields 382ci. Very feasible.

I would stay with your LS1 heads and have the ports worked, competition valve job, etc. I don't know your goals, but for a street build the LS1 castings are plenty adequate.

-Mindgame

 

Yea it is possible ... ALL-BORE LS1 382ci. Im gonna need new rods...pistons..but I can keep my stock crankshaft. Im jsut not sure ...of exact numbers..of a bore and all that..
And about my ls1 heads...what would be the biggest size ..taht I could port them to ? instake/exhts ? any close to stage 2 heads ?
Thank You

 

The bore will be 4.1" for a stock stroke 382ci build.

You don't need the "biggest size". You need a port that is sized such that it will provide the airflow the engine needs at a high velocity. That means, a head that is conservative on port volume with excellent port shape.

I know porters use "stages" to define different levels of work, but everyone defines that a different way. You should look for port work that addresses the bowl and runner as well as the venturi and seat. So, a "complete" port job with new valves and seat cutting.

-Mindgame

 

Yes it is possible. We have a guy in our club that has an all bore 388. His numbers were around 480 rwhp.

Here's his website: http://www24.brinkster.com/ezerner/pictures_index.html

 

Yes it can be done in an all bore setup. However you may have overlooked a few items. You said you don't want to spend a lot of money. Resleeving an LS1 block and cheap do not go together. You will very likely have over $1500 in block work, another $1000-1500 in rods and pistons, $2000+ for good heads (as stock heads will waste the additional cubes), and other ancillary items. If you are a 6-speed car, you should fully expect to purchase (or purchase shortly) a clutch ($500-1500 depending on choice), and a 12-bolt or 9 inch rear end ($2100-$2500 depending on options). Even if you do all your own assemby and installation, you should be prepared to spend $9,000 to $15,000 (again price dependent on parts chosen) in order to do the project correctly.

 

Well...A good buddy of mine will bore out my block for 250 bucks..another 200 for port job on my heads. Cam i bought for 350 bucks. Pistons and rods 1200...pushrods 100..lifters 200.... spirngs etc. LAbor on all that ..free. Rear end is done already. So ...I am looking at $2500 max. Reason why I want to do it - My motor is in really good shape with 48K miles. I wanna reabuild it...have fun with it... sell it and get 427ci C5R by next summer maybe.
I know LS1s are not cheap to play with
Thank You for Your replies.

 

You cannot just bore the block. It would have to be resleeved, which your buddy cannot do for $250.

 

This is true. Even if you get low cost labor, you're looking at over $1000 just for the sleeves.

-Mindgame

 

So this is going to be ... RESLEEVED 382 ? OR ALL BORE 382 ?
HEy Im a newb in internal work ...thats why im here asking those questions
Thank You

 

It would be both. All bore because all of your displacement increase would come from increasing the bore, and a resleeve because the factory sleeves are not big enough to accept a 4.1" bore so you will have to bore it out and put new sleeves in. Sleeves here are $1320 not cheap!

Understand now?