Dissapointing Dyno!

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04-18-2012, 03:51 PM

#11

rdsx18

4th Gear Member

Join Date: Jun 2008

Location: MA

Posts: 1,387

Quote:

Originally Posted by SSKILLER5.0

I called brenspeed today..the are sending my tune back out to make sure there aren't any issues with it. I mean almost 400 to the wheels is great never thought I would be standing next to a naturally asperated car with a couple of bolt ons turning 400 scratching my head and saying "whats wrong?"..haha guess I should be happy with it. Breenspeed said their cars with similar setups pull similar numbers. I think there are just to many dynos out there lying about these cars..380 stock?? that means only 5% drive train loss and that is impossible. Ford has had these vehicles certified to within 1% statistical gain or loss. I'm sure they know how to measure horsepower.

I believe it is Muscle Mustang and Fast Fords that did mods to the new 5.0, they bought the crate motor and it put down 448 at the crank right out of the box, so that is way more than the 1% Ford claims.

04-18-2012, 05:29 PM

#12

chain1

4th Gear Member

Join Date: Jul 2007

Location: Northern VA

Posts: 1,454

Are you manual or auto? If auto that would explain the additional drive train loss.

04-20-2012, 03:42 PM

#13

jthorn9

The Godfather

Join Date: Sep 2005

Location: Temple, Texas

Posts: 15,481

10.1 A/F is very rich, you should have adjusted that out with your tuner while you were on the dyno. It wouldn't suprise me to see an s197 run a 10.1 from the factory as ford tends to run them rich on purpose, but with a tune it's shocking, fix that and you'll see a jump in rwhp.

04-20-2012, 06:51 PM

#14

MoshpitMad

3rd Gear Member

Join Date: Feb 2012

Location: CO

Posts: 515

Any update on what you did about your afr?

04-21-2012, 08:15 PM

#15

JCON

5th Gear Member

Join Date: Jul 2009

Location: Delaware

Posts: 2,215

I'm running the 4.6 in my 05 but my dyno today was giving me an 11.2 A/F at WOT on every run. Aside from resonators for mufflers, I am stock

Last edited by JCON; 04-21-2012 at 08:23 PM.

04-22-2012, 07:57 AM

#16

SSKILLER5.0

2nd Gear Member

Thread Starter

Join Date: Feb 2012

Location: va

Posts: 270

My af was off. Had it fixed through brenspeed. Taking of back to the dyno soon.

04-25-2012, 04:58 PM

#17

2012FAST50

Join Date: Feb 2012

Location: South Carolina

Posts: 30

I've witnessed one put 384 hp on the dyno (can't remember the torque). Mine was weird because it dyno'd 364 hp and 381 tq. Just remember each car is differen't. Did you get a mail order tune? If you did, that is probably your problem. Pay to have someone tune it at the dyno. I saw someone that had nearly identical mods as you and put 356 rwhp (less than me stock). Getting your custome dyno tune will make a huge difference, I've seen it several times. It's just weird that it's running so rich, normally it's the other way around. Regardless a good tune should hopefully fix it.