450/478 with 2.76, boltons???

[mwaull]

Well I needed a new tune (switched to a 2.76 from 2.8) plus I wanted to check out MD Motorsports because i will be up there in a fall for a blower swap. Anyway I went up there today and had Ken tune the car . . . Came out with 451/478 or something like that . . . AF is 11.6-11.8 across the board. My mods are:

2.76 with 100mm idler
JLT
Mac prochamber
Mac 3" CB
4.10s
NGK TR6s (.035)
SCT chip

Is it just me or is this low on the hp side??? I believe he said it was dynojet #s. . . I have a new clutch as well so i know thats not slipping.

I have 18" HREs (11" wide in rear with 315 pilots). . . I have seen a thread where someone said they lost power when they went with 18" wheels (especially wide ones), but me and ken didnt really know if that had to do with it.

 

[o3SnakeBite]

I dynoed my car with 18's as well, and put down 467/490 on a dyno jet and a 2.8 pulley

 

[Tucker]

I thought MD had a Mustang dyno?
I could very well be wrong, but I thought they did.
If so those #'s are about right.
Jay

 

[BoneCrusher]

Ken tuned my car and they have a dynojet. I don't think the numbers are off. A lot of my buddies were putting up very similar numbers with the same mods. Steigemeier says 60 HP from ported eaton, TB, plenum and if you check my numbers from a 2.76 Steig ported eaton, TB, plenum you're right where you should be.

 

[redsvtcobra]

Just had my car on the dyno with mods in signature.

 

[04MystiCobra]

Thats about what I had at the time.

 

[96BlackSnake]

Thats about what I had at the time.

Exactly what I was gonna say, I was 450/471 before throttle body, now I'm 470/480 after the accufab

 

[Driven]

The wheel could make a little difference, look what I made with the mods in my sig.

 

[DR. WU 2000]

Gotta think about the weather playing a part in those #'s also, probably pretty hot where you are. Add some power to those with some cooler air. :rockon:

 

[CobraBob]

That's about what I had before I ported the blower. Catback, X-pipe, Accufab, Steeda CAI, 2.90 upper, Denso plugs and Amazon tune -- 457rwhp and 484rwtq.

 

[Rudy]

before I ported my blower I was running 2.76,k&n cai,magnaflow and had it dyno tune, I got 457rwhp 481rwtq std.

 

[Tranzlucent]

I'm at 476 and 490 with cai, o/r x stingers and the 2.76

 

[7168548]

Numbers look good. Get that biotch ported now.

 

[04MystiCobra]

With my 2.76, Predator, JLT and Stingers I made 448/490.

 

[Jimmysidecarr]

Not that far off ...(at least that's what I think)
Why???
Elevation??? Cali has elevations all over the place ... where were you at the time???
Air quality and temp<--- very big deal ... they can adjust all they want but heat soaked engines and thin hot air make low numbers...
ROTATIONAL MASS and mass at the extreme outer diameter(tires) does play a huge role...

I'm not an engineer... but I wish I was!!!!(major wanna be there)

Jimmy :thumbsup:

 

[CobraBob]

I agree that his number are probably close to the norm. The weather conditions play into this, too. Dyno on a hot and humid day and you'll lose 10-20rwhp depending on the air temp. Dynos are a blessing and a curse. They provide good information but day to day the variables can affect the numbers. And sometimes we get too focused on the numbers. And then our mind starts to race with thoughts of is it good, is it bad, etc. I know because I've been there and done that. I say your numbers are pretty good. You might get a tad more by tweaking the tune. Maybe yes. Maybe no.
:burnout: