Burns331

that is dead on what ford rated it at.

Figure 18% loss through an automatic and 15% loss through a manual.

So 350 x 1.18 = 413 hp.
and 354 x 1.18 = 392 tq.

The car is makeing what ford said it would at the crank.

So apply forumula again for you new gains and

375 x 1.18 = 443 hp
354 x 1.18 = 417 tq

Thats some really good gains there bud.

Nicley done.

john z

Thank you for the compliment and for the accurate calculations.

JIM5.0

I saw your other thread concerning taking your ride to the track. And very damn nice; high 12's on a stock car with just a tune.

What rear gear do you have?

dacobra04

My 2011 GT manual made 383hp and 368ftlbs. That is with a 5th gear pull on a mustang Dynamometer. My car is completely stock even down to the air filter.

JimR1

I had my 2011 GT with automatic trans dyno'd here in FL on a 93Deg day. I have a Airaid cold air package, Magnafolw Cat Back Exhaust and a SCT Tuner. It made 353 RWHP and 349 RWTQ. I took it to the track in Gainsville and she turned 12.92 sec at 111.23 mph. I was real happy with those numbers.

lawman1

Did a 4th gear pull on Clayton dyno (loaded similar to Mustang Dyno) and dynoed my stock 6 speed manual at 348rwhp on crappy california 91 Octane. Brenspeed tune and performance package of Kooks long tubes, x-pipe and Steeda/Borla axelbacks and she dynoed 410rwhp/380 rwt on a 5th gear pull the same crappy california 91 octane on a dynojet. On the Clayton dyno she came in at 407rwhp/359rwt again on 91 octane on a 4th gear pull. My car dynoes better on a 5th gear pull which I believe is proper.

I think there are very suspect numbers out there. People are dynoing cars on race gas or the dynos themselves are whacked. Too many variables. 350-360 stock is what these cars are. I do not believe unless scientifically verified that any stock Mustagn has gone 380+ on a loaded "Mustang" dyno. Also 93 octane numbers throws things off for those of us in California. Brenspeed dynoed my same package on a dynojet on 93 Octane at 417/390. So I think mine came in just about right. Good gas is worth 7rwhp/rwt10.

JIM5.0

I have a question about dynos. How hard is it to dyno from 1000-2000 RPM in fifth gear?
I have seen some dyno graphs where they are able to capture torque and HP curves at this low end of the bandwidth, but the vast majority of other dyno graphs do not even begin to register until 2000 or 2500 RPM and above.

My guess is that when you are rowing through the gears to get to fifth to do the dyno test, that you could care less at what RPM you begin with; you just want to hit the 1:1 gear so you can begin recording the wheel torque.

I did see in a 'Stang mag a Coyote with a C&L intake and SCT tune and the car equipped with 3.55:1 rear gear say a butt load more torque and HP in the 1000-2000 RPM range.
I am speculating that the guy shifting through the gears shifted into 5th a bit too early and that was how he was able to get data for that bandwidth.

E714FEVER

I bought my car on Oct.23rd and took it to the track on Oct.29th. completely stock, auto, 3.15 rear gear, and street tires.

First pass was 2.01 60ft 12.89 1/4 @ 111 mph....second pass 2.03 60ft 12.93@ 111mph.


These new 5.0's are unbeilevable. A gearhead I work with went with me. He's still amazed lol

StayingFit24_7

Alright, so the median or average horsepower for the 2011 5.0 is around 350hp-360hp to the rear wheels, not that bad!

zilla8

I'm with ya Lawman something just aint right.I'm in California so most of us are running 91oct but the dyno numbers just don't add up.

I dont see many California cars making more then 360-370rwhp stock but I keep seeing cars in other parts of the country making 380 and up including a few in the 390-400hp range.

I guess the higher octane makes a bigger difference then I realized.I also know that a dyno operator can make a dyno read what they want it to read lol