Building LS1 head and cam need advice on bottom end
09-30-2009, 03:20 PM
#1
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Building LS1 head and cam need advice on bottom end Im building a LS1 I got head and cam and got to have atleast 4.0 bore for the heads I bought. So my question is should I just bore out my LS1 block or even what is the max u can go on a LS1? Or should I move up to the LS2 block and start with that?
09-30-2009, 03:34 PM
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Ok got it...so doesnt the start off for the LS2 4.0 and will all my stock wiring system and computer work on it? Im going to do forged internals anyways i just didnt know if there was a max or not to what u could take the LS1
09-30-2009, 03:38 PM
#6
u can go 4.06 bore on a lq4 6.0 iron block and still use the ls1 timing/knock sensor locations.
with a ls2 or ls3 u will need to relocate/extend the cam sensor, need a ls2 timing cover, timing gear and relocate knock sensors and wiring for them.
with a ls2 or ls3 u will need to relocate/extend the cam sensor, need a ls2 timing cover, timing gear and relocate knock sensors and wiring for them.
09-30-2009, 03:42 PM
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I bought Trick flow LS2 head and Cam kit is what Im trying to get the 4.0 bore for that the heads require. There CNC ported 225cc 65cc 2.055/1.575 valves and 80cc exhaust runners. Will LS2 head work on a LS3 block?
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09-30-2009, 04:29 PM
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I got one last question that would help with making me selection on what block to use...what is benefits of a alliuminum block and iron block. Which has better life and what not?
09-30-2009, 07:35 PM
#13
I just went through this in a different forum, but here goes.
One of the last tests I did at Katech was a durability test on a 6.2L. It was making 475hp and 490 ft-lbs. It ran for 1500 of WOT durability with no ill effect to the block.
So, it all comes down to the question of dollars and weight. It you have to have an aluminum block, get one, it will cost more money, but the durability in my opinion is not questionable.
One of the last tests I did at Katech was a durability test on a 6.2L. It was making 475hp and 490 ft-lbs. It ran for 1500 of WOT durability with no ill effect to the block.
So, it all comes down to the question of dollars and weight. It you have to have an aluminum block, get one, it will cost more money, but the durability in my opinion is not questionable.
09-30-2009, 09:51 PM
#15
What are the chances those heads would fit an LS1 block? 2.055 / 1.575 valves have been run on some of the ported LS1/LS6/5.3 heads, but not at 13.5 degrees. I've seen some porters open up the chambers a bit to help unshroud valves - Tony M. did it to the heads Pat G. ran on his 508hp combo - so the .050" difference in chamber size must not make too much difference. Is it a valve clearance issue?
Pros: save $$$ using your existing LS1 block, no sensor/harness/reluctor conversions
Cons: Mark is right, bigger bores breathe better, there is no replacement for displacement
Pros: save $$$ using your existing LS1 block, no sensor/harness/reluctor conversions
Cons: Mark is right, bigger bores breathe better, there is no replacement for displacement
09-30-2009, 10:38 PM
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Im not sure I ordered the LS2 Kit from Trick Flow and they said right in the instructions must have at least a 4.0 bore so im not sure. I was just tring to find the best set up Cause I already got 23 k in the car I only had it for two months now. Im hoping for some where around 550 at the rear wheels when im done.
09-30-2009, 10:48 PM
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Modz are as followed...Fast 92mm intake, holley 90mm throttle body, SLP cold air induction, Trick Flow LS2 Heads 65cc combustion chambers 2.055/1.575 valves 80cc exhaust runners 225cc intake runners, Trick Flow Cam 238/242 duration 595/595 lift, Harland Sharp 1.7 roller rockers, MSD coil packs and MSD superconductor wires, SLP long tubes with SLP high flow cats and SLP Y-pipe, Magnaflow Stainless Catback, SLP 70lb injectors and more to come....
09-30-2009, 11:27 PM
#18
Im not sure I ordered the LS2 Kit from Trick Flow and they said right in the instructions must have at least a 4.0 bore so im not sure. I was just tring to find the best set up Cause I already got 23 k in the car I only had it for two months now. Im hoping for some where around 550 at the rear wheels when im done.
Go with one of our 415's or 427's and be done.
