rayman3550

This is the first time it has been dynoed and i plan on bringing my car somewhere else to get a second opinion but these results seem very odd for the amount of work i put in the car.

I am running:
-ls6 intake
-dart pro 225 heads
-eagle 383 stroker kit
-tsp xpipe dumped at the axle
-cam motion 230/234 custom cam
-373 gears
-built 4l60e tranny

Just curious what you guys think.
It is a mustang dyno but i don't think they are THAT far off.

I have been told that i may have measured the push rods incorrectly, but i am pretty sure i was accurate. One other thing i heard is the trans pressure may be too high...(do not know much about transmissions, i leave that to the pros lol)

I uploaded the graph. If you can not read the numbers they are:

MIN: Torque: 119 Power: 73 at 3376 rpm
Max: Torque: 352 Power: 357 at 6199 rpm
Avg: Torque: 326 Power: 342 at 5527 rpm

KW Baraka

iTrader: (7)

Dyno curve looks all jacked-up until about 4800 RPMs.....then it looks OK.

I would ignore everything below 4800 RPMs.

And yes.....I'd also be inclined to take it to another shop for a more accurate and informative sheet.

KW

rayman3550

What about the max numbers? They seem VERY low to me. I have seen cam only cars run better numbers than that, maybe not very good graphs, but definitely better numbers.

KCS

iTrader: (20)

Yeah you have something going on there. Even with the LS6 manifold, I wouldn't expect power to nose over that hard at that early RPM. Probably a dead cylinder.

What converter? Looks like it doesn't flash until way late.

rayman3550

All the cylinders are running fine. I am running a 3800 stall. Can't remember what brand/model it is off the top of my head for sure. I wanna say TCI though.

KCS

iTrader: (20)

Are you sure? The torque suggests otherwise. My 376ci engine made 80 more ft-lbs of torque with a similar cam and unported 241 heads on a mustang dyno.

If you're still reading low on the next dyno, try pulling plug wires one at a time and see which one (or more) doesn't make a difference.

thunderstruck507

iTrader: (18)

Might be a stupid question but has the car had a professional street/dyno tune?

What air/fuel ratio is it tuned to? What timing is it running peak?

DietCoke

iTrader: (18)

Lock the converter and dyno it again.

thunderstruck507

iTrader: (18)

Also true, doesn't seem to list what converter is in it but it could possibly be losing 35rwhp. Mine seems to lose about 20rwhp.

400rwhp on a stingy Mustang wouldn't be terrible.

rayman3550

Honestly I brought to the tuner and he said he'd take care of it because I obviously can't tune it myself. This was last summer. I'll check on the a/f ratio as soon as I can. I'm not sure how much street tuning he did if any.
He oddly seemed happy with the results; real nice guy, just couldn't get anywhere arguing with him because he thought everything looked good.

It'll be a few weeks before I can get it to a dyno again.

I'm sure if one of the cylinders wasn't working properly, he would have told me when he tuned it.... It drives fine though

natejk

iTrader: (4)

Sounds to me like you need a new tuner

mike431987

iTrader: (1)

Numbers do seem a little low. Also might not hurt to get yourself a wideband if you don't have one.

Rise of the Phoenix

iTrader: (27)

Just for reference, all dyno's are very different. I put down 420 rwhp on a DynoJet, and with no changes made to the car, on my friend's Mustang dyno, it put down 360 rwhp.

rayman3550

I am aware of that. But I've seen cam only cars put down more than this. This is showing pretty damn close to stock numbers and it's stroked with heads.

Rise of the Phoenix

iTrader: (27)

You've seen cam only cars make more power on THAT DYNO?

mike431987

iTrader: (1)

just seems like a fuel issue. did you make any changes to your fuel system?

KW Baraka

iTrader: (7)

Exactly!

I say; "Take it to the track and report back with your time/mph....."

KW

slow trap

iTrader: (22)

just a guess but with that combo on a dynojet with a locked vert i would think 430-450 rwhp.so if your vert isn't locked and on a md those numbers seem close. as already suggested,hit the track and see what kind of times it runs. should be mid 11x in the 1/4,mid 90's in the 1/8th just guessing.