jlaw

I'm at a loss here. Through my old restrictive exhaust, no cutouts, I made 393rwhp/375rwtq with the FM13. With the FM15, QTP ory, cutouts open, tuned, it made 386/365. Cutouts closed, it made 375/353. These numbers are nowhere near what I was expecting or where they should be. The car feels sluggish as well... doesn't pull as hard as it used to top end.

I have full boltons (LS6 intake, LT's, pulley, TB, etc.) The only changes to the car are the new cam, a TSP oil pump, and a Rollmaster single roller timing set. The timing set is non-adjustable. We installed the cam dot to dot. It'd be fantastic if it was off a tooth, but with the size of the FM15, I don't see that being the problem, I'd think there would be major P to V clearance issues. It peaks at 6300rpm.

Tomorrow, Gomer and I are going to redyno the car at Racetech and then tear it down, maybe something is wrong but it sure doesn't seem that way. More to come soon. Any thoughts / comments / suggestions / questions are welcome.

Oh yeah, Happy Thanksgiving too.

Avengeance

iTrader: (4)

Did you log it when you dynoed? Howd that look? Did you tune at all?

Friend of mine installed a cam once and his car ran OK but was down on power though.. turns out he installed the cam one tooth off. They fixed it and he showed almost 30 more hp then before. But yeah, with the FM15 Im not sure how much the tolerances would allow a tooth being off.

Good luck.

VINCE

iTrader: (1)

The simple fact it peaked so early means something is wrong.

jlaw

That's where it's supposed to peak.

Scalpel

iTrader: (4)

Was it even tuned after the install?

What was the A/F on the dyno?

There's too many variables not accounted for here.

jlaw

What is unaccounted for? I stated in my first post that it was tuned... Mike Norris at NLP tuned the car yesterday, he was the same one who tuned the car with the FM13. AFR was dead on, total timing was 28-29* between 3200 and 6800rpm (we threw 33-34* at it and gained no power) and there was 0 KR.

Scalpel

iTrader: (4)

I just saw the "tuned" buried in your text. Thanks for the clarification.

And it is peaking at it's proposed peak, correct?

There other info I was referring to you made known with the quoted reply that wasn't in your original post.

Tally TransAm

iTrader: (17)

i dont know what to tell you jon, the cam is in right.

hopefully youll figure something out if you tear it down this weekend

jlaw

My fault, I should have been clearer in my original post.

jlaw

I hope that somehow it isn't, but I have a strong feeling that it is.
Yeah, me too, lol. We'll find out tomorrow.

VINCE

iTrader: (1)

Whats the LSA? My old FMS-9 peaked at 6600rpm.

jlaw

111 LSA, 108 ICL

I have dyno sheets of this cam, all showing a ~6300rpm peak... one from Allan, one from Gomer, one from SidewaysOZ...

VINCE

iTrader: (1)

Ok.. That is just weird to me, but I could be wrong. I have swapped many cams. Some on 109.8 lsa and they still peaked higher and the cam was a lot smaller. My current cam is a lil smaller than a 112 and peaks at 6600rpm.

Kurtomac

iTrader: (5)

my F13 was ground as follows 230 232 595 585 113+2 heres a pic of my graph

jlaw

Uhrm... ok? This thread is about the F15, not the F13. If I needed F13 dyno sheets, I'd look at the 5 or 6 of my own I have sitting here

Kurtomac

iTrader: (5)

well where did your smaller F13 peak in comparison to your F15 which is bigger and SHOULD or i would think peak higher? btw good luck with your **** box ***, you dont have to be a dick i was just tryin to show where a 113+2 cam would peak in comparison to others

VINCE

iTrader: (1)

Let the bickering end. Keep this post constructive..

Thank you Sirs..

Beast96Z

iTrader: (21)

The cam should peak higher........

jlaw

Here's a graph of an F15 cam only car (I believe it's distortion_69's) tuned by Allan that he sent me.

Futral

iTrader: (1)

Jon,you and Gomer take a look at it yet?

I will be in Tallahassee Saturday around 2:00-3:00,meeting with a customer to drop off car . We can make arrangements to meet up and I can do some looking into if you want.