408 turbo build up?
Thread Starter
Teching In
Joined: Mar 2006
Posts: 8
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From: mobile,al
408 turbo build up? ok im kind of a newbie, in the chevy v8. want to build a 408 turbo or twin turbo, would like to know everyones option on what parts to use. starting with bottom end, i will be starting with a 408 iron block from texas speed. but need info on rotating assembly. best pistons, rods, and crank they all will be bought separately. thanks sean
Sean
I'm sure you are wondering why no one answered any of your questions???? Well the best explanation is that there is to many answers. You have to pick your goals. Get with a damn good shop that knows turbos, make your choice. Read trends, pick and choose.
A lot of really good shop on this site, most of which are more than capable of building your car to what you want.
David
I'm sure you are wondering why no one answered any of your questions???? Well the best explanation is that there is to many answers. You have to pick your goals. Get with a damn good shop that knows turbos, make your choice. Read trends, pick and choose.
A lot of really good shop on this site, most of which are more than capable of building your car to what you want.
David
SSU Moderator
Joined: Nov 2001
Posts: 4,857
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From: Austin, TX
Originally Posted by ls1fc3s
thanks just wanted to see what everyone was running, but i have looked around found the rods, and crank, just need help with the pistions! i will be using 72cc heads
Again, what are your goals? 700, 1000 rwhp. Since turbo, twins, how big, 61, 67, 78, 104MM ???
Get your goals. IMO, call Wheel-2-wheel (W2W) - one our sponsors. Talk to Kevin Hayes. He will do you right. Tell him what you are planning.
Pistons? I'm going to be running Wiseco. Our shop owner is going to run Diamond. Just get a good turbo piston. Now for the dish. What compression are you going to want to run? You can go from 8.0, 8.5, 9.0, to what ever. I'm going to run -22cc dish, the shop's car -15.
See just a lot choices. Crank - what kind? what is it's hp range? Shop around. Call Kevin.
David
Get your goals. IMO, call Wheel-2-wheel (W2W) - one our sponsors. Talk to Kevin Hayes. He will do you right. Tell him what you are planning.
Pistons? I'm going to be running Wiseco. Our shop owner is going to run Diamond. Just get a good turbo piston. Now for the dish. What compression are you going to want to run? You can go from 8.0, 8.5, 9.0, to what ever. I'm going to run -22cc dish, the shop's car -15.
See just a lot choices. Crank - what kind? what is it's hp range? Shop around. Call Kevin.
David
TECH Enthusiast
Joined: Mar 2004
Posts: 604
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From: Loganville, GA
If that is going in a RX-7. I'd keep the compression low just to avoid any problems... You don't need any real down-low power to get that RX-7 paperweight moving! You can focus on high boost then... So I would make compression like ~8.1 or so. I've heard Mahle, JE, Diamond are all great pistons.. I've seen more people go to Mahle for some serious setups with lots of boost lately.]
Good luck, post pics.
Good luck, post pics.
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Thread Starter
Teching In
Joined: Mar 2006
Posts: 8
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From: mobile,al
thanks guys!! goal is 700-750whp and be able to drive it on the streets a good bit! so far this is what i want to run: eagle forged crank 4.0 stroke, scat 6.125 rods
lookin at Mahle pistons with -12cc what would the compression be with 72cc heads?
lookin at Mahle pistons with -12cc what would the compression be with 72cc heads?
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Originally Posted by ls1fc3s
thanks guys!! goal is 700-750whp and be able to drive it on the streets a good bit! so far this is what i want to run: eagle forged crank 4.0 stroke, scat 6.125 rods
lookin at Mahle pistons with -12cc what would the compression be with 72cc heads?
lookin at Mahle pistons with -12cc what would the compression be with 72cc heads?
Originally Posted by ls1fc3s
thanks guys!! goal is 700-750whp and be able to drive it on the streets a good bit! so far this is what i want to run: eagle forged crank 4.0 stroke, scat 6.125 rods
lookin at Mahle pistons with -12cc what would the compression be with 72cc heads?
lookin at Mahle pistons with -12cc what would the compression be with 72cc heads?
Im making the bore (since I don't know it) 4.030" since this with a 4.00" stroke = 408 cubic inches. With 72 CC heads, a -12cc dished piston, and an assumed compressed gasket thickness of .055" (GM gasket) ....
You get 9.75:1
http://www.csgnetwork.com/compcalc.html
And the pistons in these motors usually are ABOVE the deck about .005-.01 IIRC.
And the pistons in these motors usually are ABOVE the deck about .005-.01 IIRC.
wouldnt that be kinda getting thin, on the pistons with -32cc dish risking when you detonate?
also 9:75:1 seems kinda on the high side for that set up....hmmmm gasskits are 2003 + mls gaskit...
also 9:75:1 seems kinda on the high side for that set up....hmmmm gasskits are 2003 + mls gaskit...
TECH Enthusiast
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If it's going into a 1990 RX7 hold off on the stroker. I have a buddy with a procharged 346 into a slightly heavier 1993 RX7 and it blows the tires off at virtually any speed. For 700 RWHP build a stock cube motor with a T76-GTS and be done with it.
