Graph of first 6 gears of my 10R80.

[br_an]

I'm sorry, I can't hear you over the sound of my lowly GT beating your "Shelby" in the quarter

Why is Shelby in quotes? It's not a fake GT350 I fully accept the GT350 isn't a straight-line-demon, and I don't care. It has character

I'd let you win, even if I was faster. That's the kind of guy I am.

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[br_an]

@Mikthehun1 I had the 3.15 gears. I know what that bowl of oatmeal drives like

 

[Slow89]

I cross the 1/4 at 151 mph in 6th at 7400 rpms. Second gear launch with 3.55s and a 305/45/17.

what are you using to read mph? Because my tach wasnt correct. It was showing 142mph but my draggy and slips all said 151 consistently.

 

[br_an]

Oh now it's on...

I'll add this for you to chew with your oatmeal. An S550 "Shelby" is much a Shelby as a Mach-E is a Mustang

Oh no you didn't. It's on...
SHELBY KIDS, ASSEMBLE!
We're gonna kick yer fanny

I'll add, while what you said may be technically true, I don't really care if Carroll Shelby didn't have anything to do with the car... That Voodoo is badass.

 

[Cobra Jet]

When will be the next time you’re at the track and will you be graphing this for each run?

 

[Slow89]

Do you have different height tires than stock?

305/45/17 so slightly under 28"

 

[Norm Peterson]

Did a graph of my Mustang shift points, and RPM drop per gear for the first 6 gears. It can finish the 1/4 mile in 6th gear by holding the RPM's a bit higher at the finish. Last time out was 138MPH in the 1/4 (3500 DA), but should be 140+ next time out. 8,000 RPM would be 144mph, so as long as I stay under that, I should be able to cross the line in 6th.

Can't wait for cooler/better weather.

Your computed speeds look a bit high, given certain tire compliances that increase the number of engine revs necessary (it's about a 3% correction in most cases). Nobody else's tire speed vs rpm chart I've ever seen knows about this. Hope it helps; it's made for close situations like yours may well be.

I'm getting these road speeds for the first 7 gears at 7500 rpm, 3.55s, and 27.41" calculated tire OD.

35

56

78

94

109

131

166

Norm

 

[Norm Peterson]

I just graphed that out, it will hit 152 in 6th at 7500 RPM with 27.4" tires and 3.15 gears.

I'm getting 147.


Norm

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