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Thanks! I was just curious how they mounted it to the rear sub-frame. I don't want to go this route, just intrigued Ford wouldn't find a way to make the IRS work in the Cobra Jet. One would think it would make a great development platform for more Ford Racing parts.

Run your car up to 140mph with the single piece driveshaft and let me know how smooth it is. I think most are testing these for vibration at speeds below 80 which is why some folks claim no issues. Whereas folks like me will run the piss out of the car to test it :)

Has anyone seen a picture of the 4-link suspension in these cars? It's an S550 chassis but no IRS. According to the Ford Racing website: https://performanceparts.ford.com/cobra-jet/ REAR SUSPENSION Strange Engineering 9” rear axle with 3.89:1 gear All-new 4-link rear suspension

1 1/8" SAE

It's the driveshaft angles with the one piece. I played with a shaftmaster's driveshaft on my car trying every possible orientation. The best orientation resulted in vibration from 100mph on up. Above 140, the car feels like its going to shake itself apart. Frankly, I didn't want to deal with...

The crush collar is a backup in case you screw up the existing one. It's easier to have it in hand rather than trying to find one locally (or wait a few days to get via mail). Your choice... Tony

You'll need a new pinion nut, crush collar, bearing seal driver kit (can rent @ autozone) and three jaw puller (can rent @ autozone) in addition to the seal. Also, make sure you reference the pinion flange orientation relative to the pinion shaft before removing the nut/flange. You'll need a...

Looks like they're giving you the labor free of charge. You need to negotiate a timeline on turning all that work around. I've seen so many performance shops drag their feet on any kind of major work like this turning a 2 week job into a 9 month endeavor - especially during racing season...

I noticed the tick when it had less than 1000 miles on it. It now has 33000 miles...

Mine hasn't...

Well, I can hear my blower inside my car but no one else can outside the car. I'm running a whipple stage 2 gen 3 with a 3.625" pulley. I also have a stock exhaust. Tony

if you want to hear the 2.9L whipple sing, you need to pulley it down to a 3.0 or less. It will scream! Just make sure you have the right supporting mods to handle the horsepower. That's why the smaller 2.3L whipple blowers on the Cobras or the eatons always whined so loud - they were turning a...

Ok - so you've now confirmed the correction factor is consistent, but it's still misapplied and the numbers inaccurate. Right out of the SAE J1349 whitepaper, section 5.6, titled, "Correction Formulas", they state the following, "These correction formulas are designed for correction of net...

So in your experience, 2 atmospheres pressure at 8000ft is less then 2 atmospheres at sea level? I can see a small advantage at sea level but the sae and standard correction factors put too much emphasis on barometer which is meaningless and temperature in this context. I bet that car...

Contradiction? It makes 940rwhp, not 1194rwhp.

Correction factors on turbos don't apply unless the turbo can't make full boost because it's maxed out. If it's making set boost, whatever number it shows is the number. Tony

That sticker is used at the factory to identify stock while the car is being built. It serves no other purpose or use.

Sounds like the clutch did it's job well! It exposed the next weak link in your drivetrain. Tony

There's a fairly easy way to calculate the number which will be an approximation (on the higher side) because it doesn't account for parasitic losses. Take the vehicles original horsepower, multiply by it the amount of boost + 14.7 divided by 14.7. That number is BHP of the motor with that...

Your car ET's well on the back-half of the track. A 7.12 1/8th translating into a 10.89 1/4 is impressive. I'm surprised it didn't pick up more mph on the back-half. Good runs! As for the 3rd run, definitely looks suspicious and incorrect. It would have been a pretty incredible thing to lower...