Thoughts on engine build?
Thoughts on engine build? Cracked a ring in my sc '02 Z06. Cheapest crate motor I can find is $5,300 so I thought I would build my own. Here is what I have so far:
402 Aluminum Stroked w/forged crank from Texas Speed $4,400
Patriot Performance 22.02"/1.57" 59cc Heads Assembled $1,350
Cam TSP 28r 228/228 588/588 114 $400
TSP Hardened Pushrods $100
Ported LS2 Oil Pump $140
Bolts $150
Cemtec Gaskets $150
LS2 Timing Chain $100
Car will be mostly a daily driver with track days at VIR/RA/CMP about once a month. As for cam, I am looking for something steetable, but with some good low end grunt for tracking. Any thoughts or input on any of the above would be appreciated.
402 Aluminum Stroked w/forged crank from Texas Speed $4,400
Patriot Performance 22.02"/1.57" 59cc Heads Assembled $1,350
Cam TSP 28r 228/228 588/588 114 $400
TSP Hardened Pushrods $100
Ported LS2 Oil Pump $140
Bolts $150
Cemtec Gaskets $150
LS2 Timing Chain $100
Car will be mostly a daily driver with track days at VIR/RA/CMP about once a month. As for cam, I am looking for something steetable, but with some good low end grunt for tracking. Any thoughts or input on any of the above would be appreciated.
Last edited by WADDISME; Sep 18, 2008 at 09:22 AM. Reason: Changed heads
how many cc's of relief will the pistons have? Cam... you'll want more exhaust lift and duration than intake, and some thing on a 115 + lsa. also if you can spend the $$ get arp's head studs.
TECH Regular
Joined: Mar 2006
Posts: 471
Likes: 0
From: Rolesville, NC
Forget the big power and put in an LS6 or LS2 create engine, WITH a accusump oil cooler combo and a bigger radiator.
If you go with the 408 Iron, 72 cc chambers are WAY TOO big and compression will be too low. and the car will have slow or sloppy SOTP acceleration.
Cam for a road race car and streetable is a 224R or 228 R
If you keep the idea of a 408 iron block mill the heads or get 64 cc heads and mill them to 60.5 or 59 cc, then the 228r cam. 228/228 588/588 112
anything too much bigger will just be slow out of corner.
It will be strong down low and out of corners. Part of the challenge with an iron block is that exta 100 or so lbs of wt. Slowing the car down going into VIR #1 or top of the back straight is not easy.
If you dont have them some BBKs may be need too.
Drag racing, street racing and driving on a road course are TWO different things.
Spend some time on the NASA American Iron or Camaro Mustang Challenge forums. See what those AIX or "extreem' cars are using.
Good Luck
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TECH Regular
Joined: Mar 2006
Posts: 471
Likes: 0
From: Rolesville, NC
We would all like to have big powered engines. BUT, many of these builds we see or read about here on LS1 Tech wont make 3 or even 4 track events on a road course.
Jody ( Falcon) will tell you the same thing. We see so many 'custom' built motors go BOOM. Main reason is poor cooling and lack of oiling for high speed corners or brake zones.
Sure it is cool to have a 500 hp monster but for $12,000 to $15,000 and have it blow up? that is three LS6 create motors, which one will last years of hard road race track events. And if ppl say you can do 500 hp for much less, dont believe them. Cheap, HP and reliability do not go together
My LS6 has 24,000 hard track miles on. Yes I did do a small cam 224r and I do change my springs each winter, 918s for the most part. Change oil every 500 miles M1 15-w50
The best mod I have done to my car and that was at about 600 track miles was the 3 qt accu-sump with oil cooler and transmission cooler.
I may only have about 400 rwhp, but can out accelerate most bigger cam and cubed cars from corners. Even C6Z06s have a challenge passing me under 120 mph. Over 120 on long straights I am toasted. But then I catch them again in the braking zones and corners.
Yes still thinking about that 520-530 rwhp motor though. Just going to realize that it would need to be rebuilt each winter.
Jody ( Falcon) will tell you the same thing. We see so many 'custom' built motors go BOOM. Main reason is poor cooling and lack of oiling for high speed corners or brake zones.
Sure it is cool to have a 500 hp monster but for $12,000 to $15,000 and have it blow up? that is three LS6 create motors, which one will last years of hard road race track events. And if ppl say you can do 500 hp for much less, dont believe them. Cheap, HP and reliability do not go together
My LS6 has 24,000 hard track miles on. Yes I did do a small cam 224r and I do change my springs each winter, 918s for the most part. Change oil every 500 miles M1 15-w50
The best mod I have done to my car and that was at about 600 track miles was the 3 qt accu-sump with oil cooler and transmission cooler.
I may only have about 400 rwhp, but can out accelerate most bigger cam and cubed cars from corners. Even C6Z06s have a challenge passing me under 120 mph. Over 120 on long straights I am toasted. But then I catch them again in the braking zones and corners.
Yes still thinking about that 520-530 rwhp motor though. Just going to realize that it would need to be rebuilt each winter.
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That looks like a pretty sound build, the only thing I would recommend changing is the cam. Moving up in cubes like that will swallow a lot of duration. Even though you use the car for road racing I would still move up in cam just a bit if you haven't bought it already. The 228R Cam works great in a 346 c.i motor for road racing but I think throwing a good 10 more degrees of duration would really make that motor perform for what you are looking for.
! 