Why was my HP number so low?

[Tygr1]

Had the '03 tuned today (a safe tune). The numbers however, turned out to be very disappointing.

It was a warm, wet, drizzly morning. My max HP number was 372.7 at 5709 RPM and TQ was 415.8 at 3333 RPM.

I have a 2.8 upper pulley, stock lower pulley, Magnaflow catback (no cats), an off road X pipe and a CAI.

Shouldn't I be seeing more HP than that?

 

[96gt02]

Not necessarily, depends on the type of dyno as well as the tuner

 

[Tygr1]

It was a Mustang dyno at Murrillo's.

 

[bubblehead93]

2.8 pulley - are you running the factory idler setup, any evidence of belt slip on the dyno pull...

r/
Andy

 

[Tygr1]

Running a set of Billetflow idlers. No sign of belt slip.

 

[Zemedici]

That does seem a bit low. No signs of belt slip? Who tuned it?

My 04 made 366 on a mustang dyno bone stock, factory air filter + spark plugs at 104k miles

 

[Tygr1]

Mike Murillo tuned it.

 

[96gt02]

Mustang dynos are kinda low, would you be happy with 400hp and 450tq?

 

[Tygr1]

I'm not really unhappy. I'm just wondering what my numbers could actually be, maybe on a Dynojet. Ok, yes, I'd be happier with 400 and 450. Lol.

 

[96gt02]

Probably close to what i just posted lol, generally a 5-7% increase from what ive seen

 

[RI-SVT]

how safe is the tune/timing? even on a MD with a 2.8/no cats at least 425hp I would assume.

 

[c6zhombre]

those are low, even on a mustang dyno

did you get a base pull before the tune and re-dyno?

if you feel you are not suffering belt slip, and all the parts are in working order...

I would get a compression check on the motor. If that checks out...

I'd hire another tuner

 

[Tygr1]

I asked for a safe tune...but not that safe.


I've got a call in to the tuner now, to see just how "safe" he went on the tune.