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I am looking at swapping out my stock 3.25 upper for some more PSI. :banana: Right now I am making 16.5 psi but I am looking for a chart with boost levels for the different size upper pulleys. I have searched the threads and only found a 10% lower and 3.0 upper makes about 21.5 psi. Any...

I purchased and installed one of your whipple kits for the GT500. Everytime I cold start the car it is now throwing code P0605 Internal read only memory(ROM) failure. Any ideas what can be done? I was thinking of returning to stock program then trying to upload your tune once more. Thanks for...

Alright guys, the title basically says it all. I threw on my brand spanking new 2.9l whipple and 675rwhp kit from lethal and the car drives like complete crap. Now I noticed no instructions in the kit for the whipple monoblade tb. So when it came to setting the tension on that spring i...

Another question for you all. I am looking at Whipple 2.9l kits and I am between EVO's and Lethal's. Seems to be the only difference is a Kenne Bell Boost-a-pump. So the question is exactly what level power are the stock in tank fuel pumps good to? Lethal says 700rwhp then sfadchi puts down...

I am in between a 2.9L whipple and a hellion TT system. Mainly it comes down to the install of the TT system. Has anyone done this themselves? I have tackled the Whipple swap on an 03 cobra and it looks even easier on the Shelby. All help is appreciated. Ultimate question, is this an 8-10...

I am having a hard time finding TSBs pertinent to the GT500. Anyone have a link or good resource for these? Thanks.

Well I rolled the whippled 03 out of the garage today.... went down to my local Ford dealer and took a 09 Vapor w/ black stripe GT500 off their hands. :pepper::bowdown: Any opinions on what the first mod should be? I am thinking of lowering her. Any recommendations on good springs and what...

I have for sale my 03 Cobra. 8,800 miles on the clock. Whipple 2.3l Gen II at 17 psi boost. Tuned by RWTD at 608 rwhp on 100 octane. This car has been garage stored its entire life and looks it. FL Sub frames, H&R racing springs, Kenny Brown c/c plates, magnaflow cat back and high flow...

SVT gods, I have a problem with my 03 cobra. When I am idling there is a bad miss that seems to be relatively random. I have a wideband and as it misses the AFR will jump up to 15.5+ and sometimes max over 16. It also seems to have a problem keeping a steady 15.0 at idle where it used to...

Just moved down here from the bay area. I have seen a couple nice cars around so far but where do people go for the street scene? Looking forward to going out some night and finding some unexpecting bowties. :banana: :burnout:

I put my whipple in with a 3" upper to get 18 psi of boost. I got the tune in the car and haul ass onto the freeway. :burnout: Then suddenly the boost gauge dies. Both the stocker and the aftermarket one. AFR remains the same, I don't notice decrease in power. However now as soon as I get...

I just put dual GT pumps in my cobra, got the tank all buttoned up and now the fuel gauge is acting screwy. :cuss: I don't recall exactly how the float went into the tank, and there isn't a lot of room to check and see if the float is in there correctly. Does anyone have a picture of how the...

Just a few questions for you guys. I have a centerforce clutch and 26 spline input shaft going into my cobra and I was wondering if I needed to resurface my flywheel. The car has 6k miles on it along with the clutch/flywheel. Would I need to resurface this thing? I know the stocker is only...

Sup guys, decided to join the forums here after watching them for about a month. Lots of great stuff here and I wanted to vote on the polls. Looks like that feature will have to wait tho. From the bay area originally but currently serving time in Japan with the navy. Looking forward to a...