- Joined
- May 25, 2001
- Messages
- 1,680
One thing to look at with spooling a larger turbo is you can change exhaust housings to tailor the turbo to your car. I'm working on a deal that will either net me a BB-70 (Q-Trim) or a Non-BB 70 (P-Trim). With the Art Carr 19930 thats in my car spooling a P-trim 70 with a decently large size exhaust housing (.85 PTE) should be no problem. If I go with the BB-70 I will also look at a .85 housing due to the fact the BB turbos do spool faster. I want a little lag so the car is tamer leaving from a stop.
You can get .63 Garret .63 PTE .8? Garret .85 PTE among other exhaust housings.
Turbonetics and Garret make BB setups. The Turbonetics one uses a BB on one side and the Garret uses BB on both sides. Both are expensive
If I remember right, If you look a PTE 5x turbo compared to say a Limit Eng. 49/44/60/61 you will see one less blade on the exhaust wheel. That may be what helps the spool-up (less blades, less weight, easier spool)
When I was comparing my TA-54 with my friends 60-1 Stage V Big Shaft P-trim the exhaust wheel on his looked to have a different pitch to it. that will affect the way the turbo spools too.
You can get .63 Garret .63 PTE .8? Garret .85 PTE among other exhaust housings.
Turbonetics and Garret make BB setups. The Turbonetics one uses a BB on one side and the Garret uses BB on both sides. Both are expensive

If I remember right, If you look a PTE 5x turbo compared to say a Limit Eng. 49/44/60/61 you will see one less blade on the exhaust wheel. That may be what helps the spool-up (less blades, less weight, easier spool)
When I was comparing my TA-54 with my friends 60-1 Stage V Big Shaft P-trim the exhaust wheel on his looked to have a different pitch to it. that will affect the way the turbo spools too.