Problems with sizing a turbo...
01-13-2005, 08:39 PM
#1
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Problems with sizing a turbo...
Ok, I know alot of companys rate them with HP numbers, I am gonna be doing a very minor build on my B16 with just cp pistons and eagle rods. But I have heard that if ya get the wrong size it will fall off at the top, and I want something that can last til my 8200 redline. I am just totally stuck (and no I havnt figured out how to read those turbo charts either). Basically im gonna be HOPING for 350whp with this setup, but I drag alot so I didnt wanna get something that would be "instant" boost and or wouldnt boost til late. So Basically could someone give me some ideas of turbos to look into?
01-14-2005, 02:16 AM
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Re: Problems with sizing a turbo... (quik sol)
1100-1300 for ball bearing turbo
500-700 for regular turbo.
What do you select?
Then we can talk a little more.
500-700 for regular turbo.
What do you select?
Then we can talk a little more.
01-14-2005, 07:15 AM
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Re: (quik sol)
If all you're looking for is 350 at the wheel, there are a lot of directions you can go in.
First, some background. There are 4 basic things that affect spooling: wheel diameter, wheel trim, exhaust hsg. A/R and CHRA. With the first three, the basic rule is the larger you go, the more power you'll make (at the expense of slower spooling). The smaller you go the less power you'll make (with the benefit of quicker spooling). For CHRA's, ball bearing units typically spool about 400-800 quicker than journal bearing turbos.
A 452203-1 Garrett GT32 will get you there, but you want to be careful about the exhaust housing. The 0.78 or 0.69 are both a little large for your engine.
A GT30R ball bearing with a 0.63 A/R would be a good choice, but they are typically very, very hard to find right now. A GT3071R with a 0.63 would also work.
You could even go with a SC50, which would give you approx 380 at the wheel.
The good news is that there's lot of choices for you. If you need more info, give us a call.
Rod Short
Sales Manager
Precision Turbo
First, some background. There are 4 basic things that affect spooling: wheel diameter, wheel trim, exhaust hsg. A/R and CHRA. With the first three, the basic rule is the larger you go, the more power you'll make (at the expense of slower spooling). The smaller you go the less power you'll make (with the benefit of quicker spooling). For CHRA's, ball bearing units typically spool about 400-800 quicker than journal bearing turbos.
A 452203-1 Garrett GT32 will get you there, but you want to be careful about the exhaust housing. The 0.78 or 0.69 are both a little large for your engine.
A GT30R ball bearing with a 0.63 A/R would be a good choice, but they are typically very, very hard to find right now. A GT3071R with a 0.63 would also work.
You could even go with a SC50, which would give you approx 380 at the wheel.
The good news is that there's lot of choices for you. If you need more info, give us a call.
Rod Short
Sales Manager
Precision Turbo
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