With my stock 9b's, in 5th gear, from 2000 rpm roll, I am at 14.5 psi at around 2500 rpm.
How much slower would 15g's do the same thing. I am still going to autocross this car but even the 9b's have really upset me in the spoolup dept. There is lots of on/off throttle in autocross and I dont like waiting even the quarter second it takes for the engine to make any boost, but I definately want more power. I have to get used to it, might do more left foot braking while keeping a bit on the throttle to keep the motor loaded.
I also do lapping days at Pacific Raceways, where a powerful car can make up a lot of time, I know around 400-450 whp would make a very formidable vehicle at that track. I already have all supporting mods for that amount of HP: fuel, EBC, IC's, clutch, exhaust (E-cutout), suspension, wheels/tires, instrumentation, logging capability, WB02.
I have a used set of 15g's I can get rebuilt and I would have them for 1200 total. Thats less than half of the new billet turbo's that came out last year.
I need some real world data on the 15g. I can find hundreds of dyno #'s, thats not what I'm looking for. I want to know HOW they boost. If I am at 3000 rpm in 2nd and I floor it, how long until full boost, less than a second? I dont want to be like the modded EVO's and STI's at the autocross where they are only hitting a few psi every time they accelerate cuz they have to slow down in 1 or 2 seconds.
The only thing I have found is TT Erik doing his 0-25 psi in 3rd gear, but he has DR-750's. That is the kind of data I am looking for.I know 15'g arent titanium whizbangs but they are a lot smaller, would spoolup be similar?
I am not sure I am going to get methanol injection, and we have pretty crummy gas in my county, and no E-85. I dont want to get a turbo where I can only use 60% of its potential.
If someone could make a vid for me, go into 4th gear at around 50 mph and floor it till full boost and then tell me the rpm, I want to see the boost gauge.
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