Im used to Corvettes so if this belongs elsewhere please move it.

My cousin Ray's black 20000 mile 2011 GT 5.0 automatic w/stock converter, has Kooks 1³/⁴ headers, Boss intake manifold with bigger matching Tbody and 3.55 gears and a dyno tune. It made, 378whp@6500 and 334wtq @ 4725rpm.(Seems low)

Tires are M/T 315-35 17 R drag tires. This combo nets him 12.50 1/4 miles.
On a prepped drag strip and with 38psi air pressur the Rs dead nuts hook, no spin at all.
Pic is our cars in his garage.
My Corvette has his old but good 315-35 M/T Drag Street Radials of same size. I run 28psi.
315s are listed as 25.9" tall.
I think the tall tires are negating the Mustang's 3.55 gears.
I dont know how Ford gear sets come but I think high winding Coyote motors should have 4.10 even 4.33 gears with the 6 speed automatic.

?Do you think a shorter tire would or be better for this combonation?

?We think 6500 max rpm during dynoing was a bit short.
We also think power is a bit low.
What do you think?

Thanks
Angelo B.
40 miles south of Chicago.

 

There's nothing wrong with neither the dyno numbers nor the 3.55 axle gears. The stock torque converter is definitely holding you back though. You need one that stalls at ~3500-3800rpm (1000rpm below peak TQ) to get a faster launch.
Can you post the dyno sheet?

 

This is what we got.
Can you see that?
I think it low bcuz looking at showroom floor stock 2011s on youtube making more power and Ray's GT has headers and Boss intake manifold.

Which supercharger does the savvy 2011-12 GT owner get?
How about a bottom end grunt Edelbrock?

Thanka you

 

As far as superchargers go, IF you want to keep the boss intake manifold you would need a cetrifugal, like a paxton, vortex, or procharger, these usually don't have the low end torque and make their power/boost with RPMs...
As far as positive displacement superchargers, I think the VMP TVS or Roush TVS is the preferred supercharger on the coyote engine, they are basically identical.

 

Your car is an automatic so it has a higher drivetrain HP/TQ loss than a manual, and the dyno curves won't tell you much if the dyno operator doesn't use electronic wizardry to lock up the torque converter when doing the run.
You really need to decide what you want. Your options are basically:

1. Positive displacement blower e.g. TVS, twin screw. This will deliver big block levels of torque from low rpm and the stock converter would work fine. The VMP kits not only work great but look great too. Best set up for the street.

2. Centrifugal supercharger. This will allow you to retain the Boss intake manifold and is the easiest to reverse if you want to go back to N/A. Typically doesn't produce any meaningful boost until 3000rpm and only comes on strong from 4000+. Since boost increases with rpm, it produces higher peak HP than a positive displacement blower and raises peak HP & TQ to higher rpm. Definitely need a higher stall rpm converter for this set up. Best for drag racing where the engine's always operating at higher rpm.

3. Turbo. Like the centrifugal, it produces very little boost below 3000rpm but unlike the centrifugal which produces a more linear power delivery, turbo boost comes on more suddenly so you typically see a fairly steep rise in the torque curve above 3000rpm. Since a turbo isn't crank driven, it produces a bigger HP & TQ increase per lb of boost than a supercharger. It'll also deliver the best gas mileage when off boost e.g. cruising on the highway. The downside is that a turbo plus intercooler piping takes up a lot of underhood real estate, and the Coyote engine bay is already pretty crowded. You'd also have to substitute your LT headers for stock manifolds or shorties. The best set up if you like your car to have a Jekyll & Hyde personality.

 

Sounds like the Mustang needs a stall and a blower.
Thanks much for the ez to understand summation.

Angelo

 

turbo or nothing

 

Roush charger

Torque convertor

410s

A torque convertor with a supercharger and the gears is a damn good tri-fecta to have. I had this setup on my car for sometime minus the roush. I have a saleen. So basically I had 410s first in my car. Then installed the supercharger. It was a great combination. But I tell you what. Nothing beats adding torque convertor with the setup. To this day i think its the single best mod i have done. People who road with me after the supercharger install were impressed but after the torque convertor install. They thought it was unbelievable. It really makes the car run like an animal. Ur in the power band immediately.

 

Im am a couple hours from Anderson Ford in Clinton.
3 days ago I sent them an email to get an appointment to bring in the Mustang for a Procharger and supporting mods.
All I got was a salesman trying to sell me car.
Is there an Anderson rep on this forum somewhere?
Thanks

 

Did you send your email to info@andersonfordmotorsport.com ?
It looks like it is a separate department from Anderson Ford, they have a bit of a different phone number as well (888) 715-6487