I have to scan the dyno graph in later tonight, but wanted to get this topic started. I dyno'ed recently in Orlando at Macedo Motosports on a dynojet. The AFR of my car is 13.0 on the dyno wideband. My car pulled max 394RWHP/366RWTQ on the dyno with no KR. My mods are listed below. Any ideas? I haven't run at the track, but the torque numbers seem low, even if I had stock heads. Oh yeah the car was dyno tuned. But to note, I have a new MAF and an electric cutout to be installed and will be dyno'ing again in a couple weeks when my tuner gets back from vacation.

 

Low, low, low. You should have pulled 394/366 with that cam by itself. Why the big injectors?

 

I plan on getting Nitrous down the road. The injectors were tuned for also.

 

sounds very low for the mods you have...i wouldve thought over 410/390 to the wheels with that cam & heads easy with your mods.

 

394/372...you know where I stand on this topic. It must be FL...

 

No way buddy, must me something else than Florida.
Fl is hot but those numbers are very close for a Auto car. For a M6 they are somewhere between 20-30 off.
I would defentially try and find the problem.

 

How much timing?

 

The problem(s) will be coming off in a coupe of weeks...

 

You lost me on that one.
Unless you are saying you talked with the owner of the car and figured out what the problem is.
Maybe I am just having a blonde minute, anyone else follow this post?

 

I think he is saying its the heads

 

i see PP heads in his sig.

 

I have a TSP232R and PP S2 5.3L heads.

I did 383/346 on a mustang dyno (~420/373) on a dynojet.

I haven't seen many reverse split cam cars around here and that may be the whole case here, maybe the ls1 doesn't like them? I am probably going to swap cams soon, to like a g5x2.
-Steve

 

My guess is timing. How much is it getting and what RPM does it all come in at? Probably why the torque is so low for one. What did it dyno before?

 

I finished building my 382 shortblock last week. And the 5.3Ls are not going back on when the 382 goes in, neither is the cam

 

Here is the dyno graph:

 

Assuming the AFR is on point and the timing program is decent... You might want to go over the valvetrain setup. You should check valve lash, etc. because the HP seems a little low. Today we finished a 224/228 cam only that dyno'd 392rwhp/364rwtq and your cam is a bit beefier than this.

If you need any suggestions let me know.

 

Interesting. My car with this cam has been experiencing sewing machine ticking sounds from the valvetrain since it was installed. I wonder if the pushrods TSP sold me are too short/tall for this this cam. From another thread about the 228R cam everyone replied having the sewing machine noise from their cam, so I figured it was normal along with the guy who did my install. Any ideas are welcome.

 

What pushrods do you have in there.. Generally most aftermarket heads/cam will require at least a 50 thousandths shorter pushrod. The shop doing the work should have checked for pushrod length size with a pushrod length checker. Our custom ground 224/228 cam required a 7.350.. most of the time you have to account for 30 thousandths just for the base circle of an aftermarket cam + whatever milling is done to the heads (I don't believe PP mills their heads but I would check that out also).

 

I am wondering now if I got 7.40 pushrods with the TSP H/C package last year. When I get home I will check the receipt. BTW I am using the stock rockers, and unmilled heads. Rockers are torqued to 22lbs.

 

7.400's should be fine with that cam/heads. Do you have stock lifters still?

I'd still like to see a log of the dyno run to see what the timing is throughout the rpm range. My stock timing curve gave up quite a bit of torque (and some hp) over the modified one I'm running now.