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First thing to look at could be timing and knock. Maybe your fuel isn't as good as last time

Did you only do one run? Did you datalog it?

Not at all...

They are not running the factory tune

Has anyone removed both DH and GT cams and ran them through a cam checker to see what the difference is?

Yes

I wonder what that adapter flows that they used to hook up the dual TB's

Replied right after you quoted Can't find the video but didn't the S550 they had dyno at 570 with ported heads/cams/CJ?

You're looking at an old chart before they added more mods. That's back when they just did ported heads They are trying to show the difference heads made before they talk about cams

These cars cold starts make me cringe.

9.2 @ 155mph isn't an experience!?

@Junkyard Dog do the Whipple and just use SmoothBoost to effectively turn it off while you're doing your track stuff https://www.smoothbooststore.com/product-page/supercharger-boost-control-system-by-smoothboost-whipple-3-0-mustang and honestly you could do the same with a TurboXS electronic...

Close race, lots of interesting comments...

Nobody is talking about other kits and who wants the lame ass whipple Stage 1 anyway?

Just don't say you don't void your warranty when it's not true. There is a lot of misunderstanding about how the warranty works with dealer installed superchargers

Not quite true. You basically void your factory powertrain warranty (5 years/60,000 miles), and you are then under the Whipple/FordPerformance "warranty" (3 years/36,000 miles). It's also valid from the date you bought your car. So if you already have had the car a year, and 15,000 miles, you...

I said something similar on Reddit /r/mustang and got a million downvotes :facepalm:

You could take a 2V 99-04 GT from 230whp to almost 400whp with a Vortech kit back then. Pretty decent increase but you were starting out with a lot less performance.

Does that mean 50/50 mix? That's what I ran. Without any issues. At least that I knew of. Sprayed pre and post blower (centrifugal) Can't really tell without an O2 sensor on each header tube but you can be sure it's not an exact or even distribution. Not sure what the old WW2 setups looked...

I wonder how much abuse a stock ring (no matter what the gap) engine would handle in a boosted drift car and if a different ring/piston all together is the solution You see what those cars go through for a few laps :lipssealed: