ET change from rim and tire swap?

[gregsdart]

I am going to run drag wheels and tires on my 2019 PP1 A10 MUSTANG GT. With stock rims and tires( pp1) the car ran 11.903 at 119.6 mph. E85 lund tune.
Anybody have a direct comparison to a switch to VMS 17x10 rear, 18x5 front, with MT 305/45/17 r and 28x5 SR MTs on front? Looks like the total weight savings for all will only be about 50 lbs total, but it is rotating mass, so that will help. Gains? Thanks

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[NGOT8R]

Based on what I’ve seen at the track, I’m gonna put you around 11.30 - 11.40 ET range.

 

[gregsdart]

That would be great. Since 11:50 is cut off for no rollbar, a little ballast would put me where I want to be. What average Density altitude are you seeing where these numbers are run? We average 1800 to 2400 on decent days, 4000+ on the wurst days.

 

[2022 Mach 1]

Why are you worried about the 11.5 cut off. What year car is this?

 

[NGOT8R]

That would be great. Since 11:50 is cut off for no rollbar, a little ballast would put me where I want to be. What average Density altitude are you seeing where these numbers are run? We average 1800 to 2400 on decent days, 4000+ on the wurst days.

Here’s a quick screen shot for today. I would imagine the times will be a little better going into the fall.

 

[gregsdart]

I ran the car there in Feb of 2020? Spent a winter at North Fort Meyers. Normally I run at Brainerd intl, in Minnesota. 1210 elevation, or Rock Falls Raceway, Wis, el 810. At Bradenton I got to watch the then new GT500 (modded) run a nine!

 

[Cory S]

OP. You can run 9.0/150 without a cage on a 2014+ car now. Generally, the skinnies will save 31-42lbs and improve ET between 1-2 tenths.

 

[qtrmiler2]

Roll bar is 11.50 is it a convertible

 

[qtrmiler2]

I've have run in the 30s in good air.18 pp1 Wengerd e85 tune ultimate headers stock mufflers.Billet specialties drag pack.

 

[qtrmiler2]

 

[gregsdart]

Just weighed my new rims and tires. Total weight savings from PP1 Michilins to VMS 17X10and 18x5 , 60 lbs lighter for all four, MT 305/45/17 ETSteeet R, and SR 28x6 tires. The GT 350 half shafts added 10 lbs, so net reduction, 50 lb, but 60 rotating from wheels and tires. I figure 11.40s at 121 with decent air. E85, cat delete, all else stock + 240 lb driver.

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