Depressing Dyno...

[Hozer 88GTConv]

255 hp? Pretty weak for my combo...and I developed a noticeable ignition miss at high RPM which is rather evident.
Going outside now to figure out what went wrong. By the way, 38 PSI was too lean. 42 PSI was perfect.

Comments good and bad are welcome.

[fiveohpatrol]

something is seriously wrong here.

What was your timing set at?

Can you post your torque curve with it too?

Your hp seems to start to drop off at a farily low rpm, I'd expect to see it peak at a feww hundred RPM higher.

The red line'd run was awful lean. Did you take fuel pressure out of it too see if it would run any better or something?

[Dark_5.0]

Those #'s do seem low.....Thats about 295 FWHP

I figured you would make about 320 FWHP and about 280RWHP.

What kind of dyno was it.

Later,

[Hozer 88GTConv]

It was a Dyno jet.
Yeah ,I'm pretty flabergasted (and I don't use that word often) I really thought I was making more.
Timing at 18* (verified)
Run 1 was at 38PSI
Run 2 was at 42PSI
Only 300 miles on the motor...perplexed for sure.
Any advice appreciated...
by the way, it IS primarily a import car dyno and my car was backed into it. I know my wheels were going the opposite way that the front-wheel cars are. I don't know if it makes a difference. It was my first trip.

[fiveohpatrol]

Have you checked compression?

If I were you, I wouldnt have gone to a dyno and pushed it that hard with only 300 miles on a new motor.

Could be your rings havent set yet and you arent getting full compression. But then again, I'm not internal engine expert (or any kind of expert for that matter) so I think this is a job for supermechanic (PKRWUD)

[Hozer 88GTConv]

New motor has 3k miles on it, not 300, sorry

[Shaggy]

What was his correction factor I have seen some shop use a corrction factor that makes it read high so the customers are happy or read low so they can sell you more goodies.

[Green9550]

The only thing that I can think of holding you back is your cam. I would have gone any gotten a custom cam. They are tailored to your car, not everybodies. Besides that, you have a very good set up. Have you ported your lower intake, or thought about it. It is worth trying. Well, I hope you solve your problem. Good luck.

-Billy

[ultraflo]

What's poppin kids?

Seriously though...

While you guys are looking at dyno sheets, see if you can figure out whats wrong with mine, if you like...

I'm glad I'm not the only one disappointed with the dyno.

I like that fact that the correction factor was brought up...
never took that into consideration. I mentioned in the 7000rpm lifter post about dyno operator tactics. Not reving past 6500, telling me what I need/should buy, etc.

I'm not pissed, I find it amusing ( a little anyhow )

So check out the attachment and supply me with some good old fashioned constructive criticism...

Thanks and good luck...
My updated combo is at http://www.mustangworks.com/cgi-bin/...splay.cgi?2260

And I still cant get that link to work in my signature for some reason??? You'll probably agree that I've spent alot of dough for how fast I go... (hey, that rhymes)

[ultraflo]

Here's the attachment....

[Hozer 88GTConv]

Now that curve is more like it.
I guess I will look into a custom cam, would like some more input though since TFS heads have issues with fly-cutting with a big cam.

[1BAD89]

Have you ported your lower intake, or thought about it.

Don't do that, Holley is the only way to go if you want max hp.

[ultraflo]

Thanks, I was expecting more (what else is new)

I would call Comp Cams and explain your scenario
I ran one of their cams in my previous setup and was very pleased with it... (I decided on an Ultradyne this time around for some reason)

I don't know what springs you run, but mention that to them also. You might need a matching set of springs for the cam.

Did you notice where the PMS kicks in to stand alone mode?
4000rpms... It isn't noticable with my foot to the floor, but letting the rpms come up at half throttle it bucks for a sec at 4k (not impressed with that particular feature)

Later...

[exgmguy]

You don't need a new cam. I have a very similar combo that made 309 on a Dynojet @ 5800 rpm. I think you have something else wrong. Has your car been to the track? If so, What are it's trap speeds?

Falling off at 5 grand could mean a whacked out air/fuel ratio, mis adjusted valves, bad valve springs, improperly installed cam, just to name a few.

[exgmguy]

Ultraflow, did you run that time in your sig on the hose or N/A? I glanced over your set-up and I think 36 pound injectors are WAY too big for a 302. Even if it is a healthy one like yours.

[fiveohpatrol]

Don't do that, Holley is the only way to go if you want max hp.

damn man, you seem to be pushing that holley pretty hard. Are you a dealer or somethin? just noticed you "swinging from it's balls" in a few other threads (havent used that term in awhile)

Its a very good intake, but dyno and flow tests have shown its not necessarily the best. The performer RPM is a very good intake too. Also, the GT40 is a very good N/A intake, but like you've said, the holley would make more power.

I believe he should be making atleast 285-290hp to the wheels with the combo he has, then a decent amount more with the Holley, or a few other ones

[Oldschoolpony]

You need more CAM. Seriously, The way it drops in the beginning, and also how it falls after 5500. At 7250 rpm, im still at 400 RWHP, just a small fall from peak at 6500 and I hold my HP steady into redline.( which is set at MSD 6al @ 7200 ) If I was dead set on hyd rollers, Id run a Lunati 51018, that was my last cam, still have it too, and it was a seriously nice/strong street cam.

[1BAD89]

damn man, you seem to be pushing that holley pretty hard. Are you a dealer or somethin? just noticed you "swinging from it's balls" in a few other threads (havent used that term in awhile)

Well I'm all about the Holley, I've researched it quite a bit. I think I've suggested it in like 2 or 3 other threads. Exgmguy I believe dropped .2 with just a switch from his GT40 to the Holley....that's enough motivation right there.

[89 Cobra LX]

Originally posted by exgmguy
Falling off at 5 grand could mean a whacked out air/fuel ratio, mis adjusted valves, bad valve springs, improperly installed cam, just to name a few.

exgmguy is right. Something is wrong with your combo, you should be making peak power closer to 5500-5600 RPM. I had a similar problem at the dyno and after a lot of $ and time we figured out the idiots that put the motor together had the cam in wrong. It was off by a tooth. After reinstalling the cam it was worth 40hp.

I hate to say this but your problem looks scarily close to mine. I was making peak power at 4900 RPM before I fixed the cam.

[Hozer 88GTConv]

Cam is coming out tomorrow. A moderate breakdown of the heads too for a valve check. I'll let everybody know.

I promise you, I'll have 340 NA RWHP horsepower by July.

I'll let everybody know what's up with the cam ,etc and post the dyno results. Should be ready late next week.

Hozer
sometimes I want to push it into a rock quarry.
good thing I live in Florida and there just aren't that many quarries around.