Will I break 500rwhp?
Thread Starter
Instructor
Joined: Apr 2018
Posts: 144
Likes: 12
Will I break 500rwhp?
Asked same question on ls1tech, curious if answer will be the same.
Reworking my c5z due to low oil pressure. Current build did 445/440 (404 ls2 stroker, worked 243 heads, unknown cam, 1 7/8 kooks, fast 90/90.) was pretty impressed when I was sold the car as I was told it was an ls6. After loosing oil pressure a week after buying it, and then finding out it was a stroked ls2... those numbers were pretty weak.
I’m thinking previous cam had ivc way too soon for stroker (dyno graph kinda confirms this with super early power band), and heads were too small and milled too much for a stroker (measured at .035
New recipee is 405 stroker (4.015 bore je asymmetric pistons), same 6.125 lunati I beam rods, same eagle 4” crank, prc 227 heads, cam motion 238/252 114+3, ported fast 102/ 90mm tb, tsp 1.72 roller rockers, same 1.75 kooks, 11.8 to 12:1 comp, 10% ati crank pulley, Johnson 2126st axle oiling lifters, improved racing crank scraper, 11/32 pushrods
really shooting for 500/500rw with a tq curve that doesn’t fall off after peak. Any last minute changes I should consider?
Reworking my c5z due to low oil pressure. Current build did 445/440 (404 ls2 stroker, worked 243 heads, unknown cam, 1 7/8 kooks, fast 90/90.) was pretty impressed when I was sold the car as I was told it was an ls6. After loosing oil pressure a week after buying it, and then finding out it was a stroked ls2... those numbers were pretty weak.
I’m thinking previous cam had ivc way too soon for stroker (dyno graph kinda confirms this with super early power band), and heads were too small and milled too much for a stroker (measured at .035
New recipee is 405 stroker (4.015 bore je asymmetric pistons), same 6.125 lunati I beam rods, same eagle 4” crank, prc 227 heads, cam motion 238/252 114+3, ported fast 102/ 90mm tb, tsp 1.72 roller rockers, same 1.75 kooks, 11.8 to 12:1 comp, 10% ati crank pulley, Johnson 2126st axle oiling lifters, improved racing crank scraper, 11/32 pushrods
really shooting for 500/500rw with a tq curve that doesn’t fall off after peak. Any last minute changes I should consider?
Last edited by bthomas; Dec 16, 2018 at 06:43 PM.
Thread Starter
Instructor
Joined: Apr 2018
Posts: 144
Likes: 12
Instructor
Joined: Jun 2013
Posts: 143
Likes: 12
From: Ky
Asked same question on ls1tech, curious if answer will be the same.
Reworking my c5z due to low oil pressure. Current build did 445/440 (404 ls2 stroker, worked 243 heads, unknown cam, 1 7/8 kooks, fast 90/90.) was pretty impressed when I was sold the car as I was told it was an ls6. After loosing oil pressure a week after buying it, and then finding out it was a stroked ls2... those numbers were pretty weak.
I’m thinking previous cam had ivc way too soon for stroker (dyno graph kinda confirms this with super early power band), and heads were too small and milled too much for a stroker (measured at .035
New recipee is 405 stroker (4.015 bore je asymmetric pistons), same 6.125 lunati I beam rods, same eagle 4” crank, prc 227 heads, cam motion 238/252 114+3, ported fast 102/ 90mm tb, tsp 1.72 roller rockers, same 1.75 kooks, 11.8 to 12:1 comp, 10% ati crank pulley, Johnson 2126st axle oiling lifters, improved racing crank scraper, 11/32 pushrods
really shooting for 500/500rw with a tq curve that doesn’t fall off after peak. Any last minute changes I should consider?
Reworking my c5z due to low oil pressure. Current build did 445/440 (404 ls2 stroker, worked 243 heads, unknown cam, 1 7/8 kooks, fast 90/90.) was pretty impressed when I was sold the car as I was told it was an ls6. After loosing oil pressure a week after buying it, and then finding out it was a stroked ls2... those numbers were pretty weak.
I’m thinking previous cam had ivc way too soon for stroker (dyno graph kinda confirms this with super early power band), and heads were too small and milled too much for a stroker (measured at .035
New recipee is 405 stroker (4.015 bore je asymmetric pistons), same 6.125 lunati I beam rods, same eagle 4” crank, prc 227 heads, cam motion 238/252 114+3, ported fast 102/ 90mm tb, tsp 1.72 roller rockers, same 1.75 kooks, 11.8 to 12:1 comp, 10% ati crank pulley, Johnson 2126st axle oiling lifters, improved racing crank scraper, 11/32 pushrods
really shooting for 500/500rw with a tq curve that doesn’t fall off after peak. Any last minute changes I should consider?
Drifting
Joined: Aug 2000
Posts: 1,601
Likes: 52
From: Jefferson City MO
Yes, I believe you will get there with that plan. I have a 402 LS2 with Tricklfow, 1 7/8 (I think), similar compression, lightweight valvetrain, 240/244 - ~.6 cam, Fast 102, NW TB, electric water pump, under drive pulley, etc. and made over 500 rwhp before 6,000 rpm. The torque is above 500 from ~3500 rpm or so. Not sure if you will be able to hold over 500 after peak though. That would be tough and if you spin the motor to 6500 or so, would place the rwhp at something like 630. Sounds like a cool build.
If you want, PM me and I would be happy to send you more info.
If you want, PM me and I would be happy to send you more info.
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