Maybe my HP numbers are off somewhat, I am using a conventional MPH/ET/HP calculator. My goal is a 9.75@139 with a 1.50 60' at 26-28psi.
Car is 3400lbs. Engine combo is 30 over 109/RJC Girdle/Full Port GN1s. TH-400 Hipster converter (for now) Consensus is the 109 will live in this range with out replacing blocks every 6 months.
So what is a realistic FWHP number I should be using?
Bison, what is the ballpark backpressure of a TSM setup running 9.70s @ 26psi on a 3-bolt? Information I received is around 35-38psi. Is this correct?
About 715fwhp to go 139 mph at 3400lbs. Its hard to say with any accuracy the backpressure since that info is usually kept secret. Ill say that any of the top 3 or 4 TSM guys will go a lot faster than 9.70's at 26 psi. I believe they have to weigh 3550+ in TSM. Someone else can chime in on the weight. For the typical TSM build that runs 140mph id guess the backpressure would be over 45psi if the car was legal weight. Ive heard of crazy numbers over 70psi for 150mph. Not sure if they are true but i wouldnt doubt it. 150mph is 935fwhp. Ill data log my backpressures when i get the new engines in the cars with different trim turbos to see what they actually are. I was getting some boost drop off when i was at 29psi or more with an internal gate and a lot of tension on the high boost actuator.