Results from T&J dyno tune (bolt ons).

Well, my first run on the dyno as a baseline run, (set timing adjuster to stock for this run) was 251.57 rwhp and 281.87 rwtq. Tim said that this was very strong for my mods and he was impressed. He then began trying to tweak the A/F and timing in different places but couldn't get anymore HP out of it. He played with it for about 3 hours and just could not do any better than the tune that it already had. Wierd.

Tim compared my ECU data with one of a stock GT he did and found out that my computer had already been tweaked and/or tuned by Steeda (timing was even bumped in places). So I was suprised. No where did it ever say that I had a custom tuned stock ECU, the owner said nothing about it and the laminated card that came with the car to show the mods mentioned nothing of it. I'm suprised, so I guess that's why the previous owner was told to run 93 octane in it all the time and explains why it detonates on 87, LOL. Oh well. I dyno'd 230.0 rwhp / 272.6 rwtq stock (K&N + weld in flows) SAE on a dyno jet, which doesn't seem anymore powerful than most GT's stock (or is it?)

Anyways, he only charged me $75 for the whole thing because he wasn't able to gain anything and refused to charge anymore than that, really nice of him! The cost for a dyno tune is usually $400, only if gains are made I guess (that's quite a deal there). Anyways I kind of wish I had more but he said that a 2.5" catback would bump me up higher in the 250's most likely. Tim was impressed though that it put down what it did, so I thought that was pretty cool .

It was cool meeting everyone responsible for building / tuning badass Stangs like Michael Kidd's GT and Tim's Cobra Killer. Great bunch of people and I reccomend them to anyone who wants to get the most out of their Stangs.

Test conditions were 81* F and 29.02 baro.
Mod list:
FRPP 4.10 gear
Steeda Pulleys
Steeda Timing Adjuster @ 10* (set to stock for the dyno run)
Steeda Intake
Accufab 70mm TB
Accufab plenum
MAC Prochamber (off-road of course)
Stock 2.25" catback w/ weld in Flowmaster 40 original series mufflers
An apparently custom flashed / tuned ECU by Steeda.

I guess my #'s this time were automatically corrected to SAE on the dyno? That's how it worked when I dyno'd stock.

Hehe, I got a O/R Prochamber, did you mean catback?

Yea I thought it was odd too. Not sure how to explain it. My A/F was 12.8-13.0 from about 4.5k-6k. I wouldn't think your MAF would have anything to do with it?

Yep that's what I thought. And yea, you don't even have your timing bumped! lol. Maybe the density altitude was really high? It was really humid, but I'm not sure if that makes but a 1 or 2 rwhp diff. I'll dyno again sometime soon on some other dynojet and play around with the timing adjuster (doubt it'll gain anything since Tim said the timing is pretty much maxed out as is), but I would like to see.

Hehe, yeah you are doing awesome. Tim also said that the highest he had seen was 272 rwhp from a full bolt on GT w/ LTs. I guess that's about right considering that you need heads / cam to get near 300.

Now I need to take it to the track to see what kind of times I can get with these 4.10s and more rwhp. I'd guess somewhere mid 13's @ 102 or so with a good 60'. I think I'll buy Steeda alum. upper / lower control arms to help with traction, as it sits now it likes to spin them a good bit.

Went outside to day to clean up the car / under the hood some and saw that the timing adjuster was set to 8* instead of 10*. Would that have affected the tuning? I thought I was sure that it was 10* when I reset it before the tune but maybe as I was tightening it into place it slid down a tick to 8*. I put it back to 10*