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Auto or manual? Stock #5 plugs I take it as well still? So you ran the 12.9 with the controller off or on, I take it off with only having 9.5psi. What was your trap speed at that 12.9? What's your plugs gapped at? When your car was running like crap, was it on a heavy boost in the higher RPM range? Mine has done that a few times as well. When I pull the plugs and clean them up to looking new again, check gap and put them back in, it goes away. Kinda like there being fouled out at higher Rpm's. To get 400rwhp ( corrected ) on stock turbo's is really hard. I mean you really need all the stars to line up and have a very good base motor to start with. I'm 99% sure my car can do it on the Measured side with adding a whole new racing coolant system now, vise dynoing at 392.7rwhp measured last year ( 369.8rwhp corrected ). This was 17psi on 105 gas as well. So I planed on going in NOV with the Z club here, but we didn't have enough members ready and canceled it. I was going to run same car mods as before with the added cooling system to cool the block and turbo's down just enough to get over 400rwhp on 19psi this time as well. The car had so much TQ for it's mods that, that's how I know it can push over the 400mark. But also the clear factory on these run and still getting this number, I can post the dyno sheets to show that my plugs where fouling out just like your talking about. The car's power dropped off really bad around the 4500 to 5k mark. It was running like crap, missing etc. So yes it can be done, but I went after not mostly power parts for the car. Instead I went for those mods that put the power to the ground better, Such as Aluminum flywheel, one piece aluminum drive-shaft to help with drivetrain loss. Running a full open exhaust system like you have so not other back pressure other than the turbo's themselves, a boost controller to set a steady level of boost and a determined amount of pressure. Plus boost controllers gain boost faster and hold it steady vise boost jets way of functioning. Plus you also have to know that this 400rwhp mark that the cars can get really is not street useable power. It's a set, controlled environment dyno ran set up that will flash this power and drop off. Because the efficacy of the T25 is for short burst, quick spool up and daily use of normal street car use for the avg. driver. Drop the plugs to number 6's for sure. Any Stage III twinturbo's should go this route, for rasing boost to any degree over stock is rasing cylinder temperatures and that's where premature detonation occurs as one might know. Also run a straight higher octane, say 100 or higher. This also will help in cooling the cylinders down and keep the detonation down, don't mix fuels. Try and show up to a dyno or race track on straight race fuel. That way your not mixing two, that have different burn rates and possible lower overall octane rating of the fuel in the tank.
 STAGE V++++
Going to XIII and beyond :) |
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