Maximum boost thread (93 oct > pump petrol/gasoline only!)

[RICE RACING]

Originally Posted by PSI

Still only on 40psi boost but now with a larger BW turbo. As of last nights dyno session the car now has 640kw/858hp at the wheels vs the 740hp previously with the smaller turbo. Best trap speed with the smaller turbo was 158mph, 2400lb car. H pattern gearbox, 26x8 tyre, leaf sprung rear end.

I would have run up to 45psi on the dyno (map sensor limit) but the wastegate spring will only allow 40.5psi (280kpa). If the engine is still going when the season finishes I'll probably change w/g springs and see what it makes on 45psi, time permitting. I'm not holding out too much hope though, the engines done almost 2 seasons racing plus 2 powercruise events, dirt drags, and whatever else. I'm glad I didn't switch to E85 yet, pump petrol is starting to get real interesting now!

Good stuff, and YES I have always wondered why the fuck people accept the total head fuck of E85 when I proved (and you are now) water injection over so many years.................. beyond me!

Are you still using your IGN-1A coils? I have been given some special ones to test by a well known high performance manufacturer, and in the interests of science I may just use them myself.

Which BW did you move up to?

Peter

[TitaniumTT]

Originally Posted by PSI

Still only on 40psi boost but now with a larger BW turbo. As of last nights dyno session the car now has 640kw/858hp at the wheels vs the 740hp previously with the smaller turbo. Best trap speed with the smaller turbo was 158mph, 2400lb car. H pattern gearbox, 26x8 tyre, leaf sprung rear end.

I would have run up to 45psi on the dyno (map sensor limit) but the wastegate spring will only allow 40.5psi (280kpa). If the engine is still going when the season finishes I'll probably change w/g springs and see what it makes on 45psi, time permitting. I'm not holding out too much hope though, the engines done almost 2 seasons racing plus 2 powercruise events, dirt drags, and whatever else. I'm glad I didn't switch to E85 yet, pump petrol is starting to get real interesting now!

That is just impressive as all get out. What ECU are you running and what size BW?

Originally Posted by RICE RACING

Good stuff, and YES I have always wondered why the fuck people accept the total head fuck of E85 when I proved (and you are now) water injection over so many years.................. beyond me!

But but but.... bdc?

Originally Posted by RICE RACING

Are you still using your IGN-1A coils? I have been given some special ones to test by a well known high performance manufacturer, and in the interests of science I may just use them myself.

Oh really? I FINALLY have in my possession the Bosch Motorsports Coils (I've actually been using them for a number of years now) along with the IGN-1A coils (running my RX8) and a set of factory D585 LS2 coils (thanks Glenn) Whenever the FC does make it onto the dyno after I get her tuned to about 12-14ish PSI I'm going to swap coils, adjust dwell and make a pull. Whichever coil makes the most power, is the setup that will stay on the car. I think it'll be between the IGN and the D585, and I have a feeling it will be the D585, although the IGN was designed around a 2-stroke Merc outboard soooooo, it should be interesting