Need help with 408ci turbo build...
Thread Starter
Teching In
Joined: Oct 2009
Posts: 29
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Need help with 408ci turbo build... Okay guys, im building a 95 z28 and I just picked up a 408 block. Im shooting for 1000whp and need some help. Im new to turbos so help me out as much as you can. I will be getting a PT88 for the boost. I have a th400 that will be going with it. This will be a street/strip car just to go out and have fun. To get that 1000whp range, what are some things will help me get to where I want it:
Bottom end- crank,rods,pistons etc etc
Heads? Intake? Fuel system? Ignition? Tuneing programs? All the nessacary needs to get me to that mark!
Please feel free to give as much input and possible! Thanks in advanced, Jeff.
Bottom end- crank,rods,pistons etc etc
Heads? Intake? Fuel system? Ignition? Tuneing programs? All the nessacary needs to get me to that mark!
Please feel free to give as much input and possible! Thanks in advanced, Jeff.
Joined: Nov 2001
Posts: 8,484
Likes: 0
From: Cecil County Raceway!!!
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Thread Starter
Teching In
Joined: Oct 2009
Posts: 29
Likes: 0
I started this thread to ask for some help, and im going to see what other people say about it.
It's that when your backpressure is so high that you can crank the boost all you want but you wont get any results. It's like hitting a wall, of backpressure really. You have to open the turbine size up to allow it breathe deeper. Yes a 88 will make 1250 on a 346 or 365 370 max.
I wouldn't go past 370 with a PT88, now a S88 is different as I was enlightened to the other day.
I wouldn't go past 370 with a PT88, now a S88 is different as I was enlightened to the other day.
I looked for the same answers, but didnt really find any cut and dry facts. I talked to Jose at forcedinductions.com and he recommended a GT91 for 1000whp goals on a 408. Now I'm questioning my decision of going with a 91mm 1.08 housing, instead of the 94mm turbine. We shall see. Good luck to the OP, post some pics up of your progress. I love seeing these turbo builds.
