Long story:
A few weeks ago I was asked to test some octane boost to see how effective it was for a television show on Velocity. I needed a street car with a solid foundation to test it on so I gave "Grey Racer" a call. His car is a daily driver with AC, 200R4, etc.. and an RPE engine, XFI, 6466 turbo, etc.. Well yesterday we put it on the dyno, lowered the boost as low as it would go, turned the alky off, and I retuned for pump gas only. With his actuator and moderate porting of the wastegate hole, we could only get the boost down to 18psi. Since I didn't want to take any chances hurting Grey Racers engine (on national television!), I initially set the timing real low then slowly snuck up on it until we had maximum timing without knock.
Now this is what I found interesting, the car made 504rwhp on straight 93 pump gas! No knock. No alky. No octane boost, etc.. We repeated this test 4 more times and all pulls were between 498 & 510 hp depending on how cool the IAT's from the PTE stock location intercooler were.
I know we shouldn't be that surprised since we are using a turbo capable of 900hp. I definitely do NOT recommend pushing it on straight pump gas. This was just a test. I have several customers who bought this turbo just so they could run fast at lower boost levels and lower IAT's.
A few weeks ago I was asked to test some octane boost to see how effective it was for a television show on Velocity. I needed a street car with a solid foundation to test it on so I gave "Grey Racer" a call. His car is a daily driver with AC, 200R4, etc.. and an RPE engine, XFI, 6466 turbo, etc.. Well yesterday we put it on the dyno, lowered the boost as low as it would go, turned the alky off, and I retuned for pump gas only. With his actuator and moderate porting of the wastegate hole, we could only get the boost down to 18psi. Since I didn't want to take any chances hurting Grey Racers engine (on national television!), I initially set the timing real low then slowly snuck up on it until we had maximum timing without knock.
Now this is what I found interesting, the car made 504rwhp on straight 93 pump gas! No knock. No alky. No octane boost, etc.. We repeated this test 4 more times and all pulls were between 498 & 510 hp depending on how cool the IAT's from the PTE stock location intercooler were.
I know we shouldn't be that surprised since we are using a turbo capable of 900hp. I definitely do NOT recommend pushing it on straight pump gas. This was just a test. I have several customers who bought this turbo just so they could run fast at lower boost levels and lower IAT's.
Interesting test I will be subscribed.
