maximum bore of an LS1?

[skorpion317]

I have a certain project planned for next year....i know the factory bore of the engine is 3.900". can it be taken to 4.000" without any problems?

[foff667]

Originally Posted by skorpion317

I have a certain project planned for next year....i know the factory bore of the engine is 3.900". can it be taken to 4.000" without any problems?

I believe it has to be resleeved but yah i think you can...costs a good amount of cash though and some processes are better then others(ie dropped sleeves)

[skorpion317]

about how expensive would that be?

[foff667]

Originally Posted by skorpion317

about how expensive would that be?

not sure really...check out ls1tech.com theres tons of info over there...i tried finding a price on resleeving with no luck but just did a quick search...im sure if you post up people will give you the anwsers your looking for.

[V]

or you can go for an lq4/lq9 6.0l block. Mine will have a bore of 4.030 and with a 4.125 stroke. The LQ's are all iron though so they are a little heavier, but i feel its worth it to handle the ATI procharger im also installing. the LQ's fit just like the ls1 and can even use 95% of the ls1 components. just and idea, but i have heard a stock ls1 can get a bore of .010 over without resleeving and sleeves for anythign past that but i wuld not go without resleeving if it is anything other than stock non-racer.

[skorpion317]

i went over to LS1tech.com.....they said an LQ9 block would be best since it already is a 402. SLP sells a kit of some sort. I just need to find out what heads to use. I plan on the motor being over 500 HP by itself, while still running on pump gas.

[foff667]

Originally Posted by skorpion317

i went over to LS1tech.com.....they said an LQ9 block would be best since it already is a 402. SLP sells a kit of some sort. I just need to find out what heads to use. I plan on the motor being over 500 HP by itself, while still running on pump gas.

your planning on keeping it na?

[skorpion317]

Originally Posted by foff667

your planning on keeping it na?

for now, at least. I'm kinda wary of using the LS6 heads....not sure what kinda compression they'd make on the 6.0L block. i'd have to find out what they'd produce.

[V]

for n/a use the ls6 heads are ok, but you have to build the engine to work with that counted in. Â*For s/c use, ported 6.0l heads with aftermarket valves are said to be fine. Â*the ls6 heads make the compression higher than ideal for a blower(usually should be around 8.5:1) I'm doing some type of special blower heads, i set aside $2500 for those(probably more than i need but just to be safe), once i get closer to my project thats when ill figure out exatly what brand/kind.

From everything ive read, the difference between lq4 and lq9 is just the heads, so the blocks are the same. The weight difference between the aluminum ls1 and iron LQ can almost be completely taken care of by switching to tubular front a arms and k member. Â*For my motor, Â*i'm doing a 4.125" stroker crank to get a displacment in the 422 area with a overbore of .030 and then with all the engine work(cam, valvetrain, heads, exhaust), i should put out around 600hp n/a. Â*The rotating assembly alone is 3400. once thats set i'm doing an ATI F1 blower w/ the twin aftercoolers. Â*In my talks with ATI, they said with that setup i should be easily capable of putting down over 850rwhp...and possibly 1000 with a little more effort and $, i guess we'll see next spring

Also with the LQ series, ive heard that some of the front engine accesory holes are different from an LS1 but i dont know for sure, if so, i will make the modifications either with new brackets or whatever for mine.

[skorpion317]

i'll be sticking with the stock 6.0L bore and stroke....the engine is going into a Camaro, so it'll be an SS396. Super Chevy did a 408 buildup on a 6.0L block....they got 590 rwhp out of it.