Check out my Dyno chart.

[ZXMustang]

Heres the numbers. Sound about right with 23 degrees of timming. Mods are in my sig.

 

[Cobrachic03]

why do the numbers drop so fast after 5000rpms? thats a funny looking graph, but what do i know...lol

 

[Mystic03]

should you make more rwhp than rwtq if only 2.80 and aux?....

 

[HISSMAN]

Something ain't right.

 

[Ghoust]

your torque numbers are ok. But your hp numbers are off by about 30hp. I would get a new tune.

 

[Cobrachic03]

Something ain't right.

yea i think so too, the hp is low for having a pulley, i still have a stocker and put down 416rwhp...

 

[sambandit]

Numbers are a little low, however the A/F looks pretty close. Perhaps not enough timing......

 

[redsvtcobra]

Your torque is dropping off too fast. Doesn't look right at all. The curve should look more like a table rather than a side of a mountain. Horsepower seems really low for a 2.8 pulley. Maybe you a have a bird stuck in your inlet pipe? oke: Seriously though, I'd get it checked out. What type of dyno was it?

 

[Greg@RET]

Your hp is low.... I agree your a/f looks good and you said 23*. What plugs do you have? BTW there is no need to spin the stock Eaton pass 6.0 rpms :beer:

 

[key]

He doesn't have mid-pipe + catback, couldn't that be hindering his HP?

 

[HISSMAN]

He doesn't have mid-pipe + catback, couldn't that be hindering his HP?

Maybe by 10-20 hp, but his numbers are still low. Like someone else said, the torque is right on for the mods. HP should be around 430-440 at least.

 

[HISSMAN]

How does your datalog look. Maybe they have you commanded with a peak of 23* of timing, but it could be all over the place through the rest of the rpm's. It is the little details of the tune that make the difference.

 

[FireRed04Vert]

The numbers don't bother me as much as the shape of the graph. Numbers don't mean anything unless you can compare them to another known vehicle. It could be the way the dyno is calibrated. But the torque sure seems to fall off fast. I see a bit of wheel spin around 5400 rpm too. With 23 degrees of timing and that smooth an a/f ratio, I would be interested in seeing a pull from another dyno.

 

[wpd736]

is that wheel spin or belt slip ????

 

[ChicagoMike]

He's running the stock intake with a K&N drop filter and 100% stock exhaust, and I also think stock plugs. Basically just threw a pulley on it and tuned it.

If he does intake and catback - he'll need another tune right?

 

[Crowley]

is that wheel spin or belt slip ????

Thinking the same thing ..

Crowley

 

[adamb258]

getting rid of the stock exhaust will help

 

[Rick James]

EDIT: I'll take belt slip for $200 Alex. Also, isn't 23* of timing a lil excessive?

 

[HISSMAN]

For some reason I thought I saw FIPK in your sig. With just a drop in and the other mods you are about 10-15hp shy of the norm. So with that, your numbers are about right. But yes, that graph is atrocious. After further review I am going to say that it is most likely a combination of Spark blow out and belt slip.

-Jeff

 

[HISSMAN]

I was thinking belt slip also, but if that was the case the torque would drop off at the same time right? Also, isn't 23* of timing a lil excessive? Something is wrong if you are making PEAK HP @ 3500rpms. I would take it to another dyno.

His peak HP is at about 5600 rpm. His torque peaks at about 3500 which is about right.