largest displacement
Thread Starter
Teching In
Joined: Mar 2012
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From: Dry Ridge Ky
largest displacement Can anybody help me, Im going to build my 99 ls1 block was wanting to know what tne largest displacement I could get out of this block without resleaving the block. thanks for your help in advance .
TECH Senior Member
Joined: Mar 2004
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From: BFE
Most of the successful builds I've seen of that kind are more track oriented (no real longevity). Of course this is somewhat relative to the $$ one spends and especially how good the builder is with the correct parts.
It is more reliable to use 6.0 blocks and build 402>408 cid. Keeping the motor square.
Thread Starter
Teching In
Joined: Mar 2012
Posts: 37
Likes: 0
From: Dry Ridge Ky
nothing like old gen 1 Larger than 4.00 crank on LS1/LS6 is doable but not recommended for street. Because with increased stroke the piston comes out further down at BDC and has more sideways loads/rocking exposing the skirts in crank area and they have a tendency to burn oil after awhile.
Most of the successful builds I've seen of that kind are more track oriented (no real longevity). Of course this is somewhat relative to the $$ one spends and especially how good the builder is with the correct parts.
It is more reliable to use 6.0 blocks and build 402>408 cid. Keeping the motor square.
Most of the successful builds I've seen of that kind are more track oriented (no real longevity). Of course this is somewhat relative to the $$ one spends and especially how good the builder is with the correct parts.
It is more reliable to use 6.0 blocks and build 402>408 cid. Keeping the motor square.
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Can 't find the thread, but there's a guy in the dyno section who over bored a stock 3.898" LS1 to 4.00". I had asked him to keep us updated over the lifespan of the engine & have not received any update. Most feel as though it won't last given the thinner sleeves. Who really knows for sure until it's tested? Would luv to find out how it's doing.
If anyone can find it, please link the thread here. I'd like to tag it for future reference.
If anyone can find it, please link the thread here. I'd like to tag it for future reference.
Cubic inches are not nearly as important as airflow through the engine. Power is in the cam/cylinder head/intake/exhaust combination more than anything. I would stay at a4" stroke 382-383. Any more stroke than that and you are not doing much better because the small bore will not let the heads breath.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
There is no substitute for displacement but it has to be done right. A 393/396 will produce more trq and therefore accelerate quicker but the issue is the piston's position and the stock sleeves.
