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My nitrous stuff ran 1400* - 1450* with no problems. The car made 1192 rwhp with stainless steel exhaust valves. After pulling the motor apart because of a rod bolt issue, the exhaust valves looked exceptional and I was able to reuse them. I'm with you on the flow bench as well. Steve

Smoothing definitely gets rid of the jaggedness on the graph. Unfortunately it just masks the issue and the issue still remains. Unless this is not an issue and all of these motors display the same tendency. Are there any more DynoJet graphs of these supercharged motors around? Steve

You can definitely degree the cam without replacing it. My "a cam change" reference should have been "degreeing a cam". Thanks for the correction. I guess it's obvious what I have on my mind. :biggrin Not ever having worked on one of these motors I purchased a service manual and it states...

I am wondering what your exhaust temps on the 490 are? I do not have EGT's on my turbo deal but I do on my 542" and 632" BBC motors. My turbocharging experience is with a 1990 Callaway Twin Turbo with a 350 TPI motor. My maximum rwhp through the mufflers is 650 - not exactly in the same...

Thanks! I put the air inlet stiffener in before running any tests. The stock tune is 100% responsible for the A/F richening above 5900 rpm. The lowest number that can be recorded is 10:1 so I really don't know just how rich it was. As far as I am concerned, even the SCT/Accufab tune is too...

Matt, over 520 sounds real good for torque. I am a little surprised about the horsepower. Was your's dyno'd on a DynoJet? Do you recall the engine temp and the air conditions? I had a brief conversation with John @ Accufab when I originally placed the order. I asked for his opinion on the...

Since this is my first post to this forum, I thought I would make it an informational one. I purchased my GT about a month ago and have been chomping at the bit to get it on my DynoJet. This is the first Ford I have ever owned. After 280 miles I decided it was time. I purchased the Accufab...