how small of a turbo can i run?
Thread Starter
Staging Lane
Joined: Oct 2010
Posts: 90
Likes: 0
From: no mans land
how small of a turbo can i run? I am building a turbo system for a 5.7 vortec. my cam tops out at 5800rpm
I am not worried about going over that rpm. i will be running rhs heads and rhs efi intake. I want to put a smaller turbo on this setup say a 67mm and max hp numbers at 650. I am not going to go over that. i want to be able to run 3'' downpipe and i want quick spoolup this will be front mount. I am just wondering about housing sizes, size of turbo. this truck is a daily driver. thanks for any input.
I am not worried about going over that rpm. i will be running rhs heads and rhs efi intake. I want to put a smaller turbo on this setup say a 67mm and max hp numbers at 650. I am not going to go over that. i want to be able to run 3'' downpipe and i want quick spoolup this will be front mount. I am just wondering about housing sizes, size of turbo. this truck is a daily driver. thanks for any input.
TECH Enthusiast
Joined: Mar 2012
Posts: 728
Likes: 3
Every person here thinks you need a giant turbo capable of at least 50% more than your goals or its blasphemy.
67mm isn't too small. There are 62mm turbos available with T4 housings sized well for a V8 and are rated at 700+ hp if you want to go that route. This place is HORRIBLE when it comes to asking for turbo size recommendations.
67mm isn't too small. There are 62mm turbos available with T4 housings sized well for a V8 and are rated at 700+ hp if you want to go that route. This place is HORRIBLE when it comes to asking for turbo size recommendations.
Every person here thinks you need a giant turbo capable of at least 50% more than your goals or its blasphemy.
67mm isn't too small. There are 62mm turbos available with T4 housings sized well for a V8 and are rated at 700+ hp if you want to go that route. This place is HORRIBLE when it comes to asking for turbo size recommendations.
67mm isn't too small. There are 62mm turbos available with T4 housings sized well for a V8 and are rated at 700+ hp if you want to go that route. This place is HORRIBLE when it comes to asking for turbo size recommendations.
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Run a 366 or 368 with a T4. We made 681rwhp with a 68mm compressor wheel on a 5.3l through 35" tires.
The stock L31 computer will not go past 5800rpm anyhow, so I would be looking in the 66-68mm compressor range. Most I have made with a stock bottom end L31 was 480rwhp and it lasted at least 5 seasons and never had one problem.
The stock L31 computer will not go past 5800rpm anyhow, so I would be looking in the 66-68mm compressor range. Most I have made with a stock bottom end L31 was 480rwhp and it lasted at least 5 seasons and never had one problem.
Thread Starter
Staging Lane
Joined: Oct 2010
Posts: 90
Likes: 0
From: no mans land
Run a 366 or 368 with a T4. We made 681rwhp with a 68mm compressor wheel on a 5.3l through 35" tires.
The stock L31 computer will not go past 5800rpm anyhow, so I would be looking in the 66-68mm compressor range. Most I have made with a stock bottom end L31 was 480rwhp and it lasted at least 5 seasons and never had one problem.
The stock L31 computer will not go past 5800rpm anyhow, so I would be looking in the 66-68mm compressor range. Most I have made with a stock bottom end L31 was 480rwhp and it lasted at least 5 seasons and never had one problem.
That is a nice setup for sure, will you have a better then stock rotating assembly? Anyhow no reason for a 70mm or bigger turbo if you are only looking for 650hp. The one I was talking about had a ramjet intake and it worked nice. Had a little 212-215 cam and made great power from 2500-5500.
Thread Starter
Staging Lane
Joined: Oct 2010
Posts: 90
Likes: 0
From: no mans land
That is a nice setup for sure, will you have a better then stock rotating assembly? Anyhow no reason for a 70mm or bigger turbo if you are only looking for 650hp. The one I was talking about had a ramjet intake and it worked nice. Had a little 212-215 cam and made great power from 2500-5500.
Every person here thinks you need a giant turbo capable of at least 50% more than your goals or its blasphemy.
67mm isn't too small. There are 62mm turbos available with T4 housings sized well for a V8 and are rated at 700+ hp if you want to go that route. This place is HORRIBLE when it comes to asking for turbo size recommendations.
67mm isn't too small. There are 62mm turbos available with T4 housings sized well for a V8 and are rated at 700+ hp if you want to go that route. This place is HORRIBLE when it comes to asking for turbo size recommendations.