LS swap questions

[LowchevyII]

definitely, i just want to thank all of you guys for the info. I will keep you up on the project as best as i can. Once i sell my 350/350 combo ill have some cash and am hopefully soon to come up on a new job so i can start floating some more cash toward the nova. I really cant wait and this is all stuff ive been wanting to do for so long i cant wait to start, as well and show you guys my progress. As i progress, i hope to get some more insight and advice. this site has been so great to me. i hope to give back soon.

thanks again guys,

jeff

ps

if you know anyone with an lq4/9 shortblock for sale or a complete lq4 (for a decent price) let me know

[IndyNova]

there is a guy in southern indiana that has some lq9's for sale, i'll see if I can 't find his number. Also, I would check out the truck sites that had those motors in them, silveradoss.com, etc. sometimes they have them in the for sale section. good luck, i'll be doing this swap also

[1970camaroRS]

Just wanted for you to keep in mind that with a .041 compressed gasket your LQ4/L92 head combo will have 9.4:1 compression. With a .051 gasket it will be 9.2:1. Give or take .1

You'll have to keep the cam a bit on the small side for duration in order to keep it from being a dog down low.

If you look at the dyno graph of the engine built by CarCraft, when they went from the stock LQ4 heads to the L92 heads they actually lost a good bit of power from 2,200 rpm to 4,800 rpm with the largest loss of -21 ft/lbs at 2,200 rpm and -10 to -16 in the mid-range. Of course, after 5,000rpm when those big (260+cc) heads got into their grove they handed the stock heads....well, their heads. Also, the Hot Cam used in the CarCraft motor is JUNK when compared to other modern grinds for LSx engines. Try a G6x92-3 L92 specific cam or something similar. But only do so after you mill the heads down to about 64cc or less to bring compression up over 10:1. Also, invest in some ARP rod bolts if you're going to spin it to 6,800rpm like CarCraft did.

[LowchevyII]

Originally Posted by 1970camaroRS

Just wanted for you to keep in mind that with a .041 compressed gasket your LQ4/L92 head combo will have 9.4:1 compression. With a .051 gasket it will be 9.2:1. Give or take .1

You'll have to keep the cam a bit on the small side for duration in order to keep it from being a dog down low.

If you look at the dyno graph of the engine built by CarCraft, when they went from the stock LQ4 heads to the L92 heads they actually lost a good bit of power from 2,200 rpm to 4,800 rpm with the largest loss of -21 ft/lbs at 2,200 rpm and -10 to -16 in the mid-range. Of course, after 5,000rpm when those big (260+cc) heads got into their grove they handed the stock heads....well, their heads. Also, the Hot Cam used in the CarCraft motor is JUNK when compared to other modern grinds for LSx engines. Try a G6x92-3 L92 specific cam or something similar. But only do so after you mill the heads down to about 64cc or less to bring compression up over 10:1. Also, invest in some ARP rod bolts if you're going to spin it to 6,800rpm like CarCraft did.

hadnt been on this post in a while but i just noticed your response. thanks for the heads up on this. ill definitely keep this stuff in mind.