NicD

Further more here is a quick screen cap of the last dyno scanner log file showing the timing and airflows. I assure you, it's got as much timing in it as it will take at WOT at all RPM ranges as the previous dyno showed quite a bit more KR when I commanded more timing not to mention it was actually audible and visible in the exhaust stream at that point.

SS MPSTR

Seriously look at the Pfadt headers before you buy. Very nice pieces, and some great results.

DCamper

dude, not to be a complete dick, but you should maybe optimally build your car before throwing out accusations of a bad tune. You threw on heads and a fairly large cam without even doing headers? talk about choking an engine.. you're in AZ, its hot and the fuel is terrible.

stop building your car backwards and you may enjoy a better running car..

oh, and my gt500 setup should be in the 560-570 range and it put down 529 in this **** weather with **** fuel..

DCamper

where is this unicorn dyno? I have an ego to inflate..

EX1

That "unicorn" dyno is the same one I have been on for the past 3 years. The best way to back up dyno numbers is with performance at the track. I back up those dyno numbers with 140+mph trap speeds in the 1/4. Those trap speeds are right inline with the power advertised. The numbers for the car he is referring to are accurate and not inflated.

DSteck

I think what we can all take away from here is:

Don't live in Arizona.

SlowVet05

In my first post I stated that I wanted to take care of the valve issue, and in an attempt to save money in the long run I had them install a cam as well. Since this was a budget build and I didn't want to fork out another $2k for headers and install I was willing to take a hit on power for the time being. All I'm saying is I think it should be making a little more than it does even being restricted. The 580+rwhp H/C numbers aren't what I would call "unicorn numbers". Those numbers are duplicated all over the country even on 91. It's hot in Texas and California too. As EX1 stated, he made 597 on 90 octane and backs it up with track times. The Widow/WCCH combo is fairly common.

NicD

I agree with you, it should be making more power but seeing as how you don't have the "basics" to go with your combo the only suggestions I can make is to put the exhaust on it and see what happens at that point. There are two components in a tune that determines your power and that's timing and fuel. Your fueling is where it should be and it's running the most timing it can so the only thing left is the engine. Do you know how many heads/cam C6Zs have made 580+ rwhp here in AZ? None, and it's not for a lack of good cams and heads. Most are sitting around 550-560 rwhp on average with big intakes and big exhaust, both of which are not on your car.

NicD

Hey now, being able to drive the nice cars year round makes up for the crappy air and temperatures.

Unreal

Unless your car overheats all the time from being too hot.


I made an offer that no one could refuse to Matt@FSP to come play with my car. For some reason he said no.

JMB

Are we sure that the cam was degreed properly when installed? What was it installed at?

Cordes Performance Racing

yes we installed it properly. a heads/cam build is a walk in the park compared to the other stuff we do.

JMB

Have to ask, we have to start somewhere

I'm surprised that you even made the power that you did with that low of timing! Do you have the actual dyno A/F chart that you can share?

My two cents would be to get some super high octane gas (additive if necessary) to eliminate the gas issue so that you can run timing in the 25-26 range at a minimum and start the runs with the engine temps in the 160 range (with a cooler thermostat) before crying foul. Your set-up cannot be compared to others when you're only running 17 degrees timing at WOT!

EX1

Are the right plugs in the car?

SlowVet05

Has TR55's in it now. I've been told they should be TR6's or cooler.

LS9Drew

Well that's part of the problem that's a hotter heat range than stock

SlowVet05

They'll be changed before the re-tune. Either stock or one cooler.

pkincy

Guys, don't knock Az. Where else can you run LT headers and a cam with HUGE overlap and smog it at a State Station? I would put a wide spot in the collector that looks like a cat at least but given that they don't sniff the car and only pull ALDL data it is a pretty nice state to get big power in.

I made a change from a Texas Speed Torquer on a 112 to one on a 114 in Az. I thought I lost 40 hp and 45 ftlbs of torque. But the basic difference was a DynoJet pull in Nevada on the 112 and a DynoJet in Phoenix on the 114.

I concur with others here. The best comparison is trap speed before and trap speed after. How it "feels" is way too subjective as are comparing runs across different dynos particularly different kinds of dynos. I have found the Dyno Pak to be slightly more conservative than DynoJet with the Mustang dyno easily 10-15% behind the Dyno Jet and 10% behind the Dyno Pak.

EX1

Exactly, like discussed in PMs earlier this week. The shop put the wrong plugs in the car. Put in a colder plug so you can throw some timing at it.

Unreal

Utah, Texas, New Mexico, Colorado, Montana etc. Pretty much anywhere but California.