rumor i heard last night was that the ATP dyno is no more

 

MWF or Saturday are totally open for me. I'm only in class on Tues and Thurs..... so whenever is good for him on one of those days works for me.

btw, I'm poor. Somebody buy my BLACK 17x7.5 SDR's with SO-3's on them. $450. About 4,000 miles left on the tires.... hawt lookin' wheels.

 

stop it! LOL.

 

I think he was being polite because he doesn't have anything against EJ20, just Ed.

 

Well whatever it is, it's appreciated.

 

jeebus wasnt trying to bash anyone was just curious if ed had an afr chart handy, from his other posts it seemed like he had a wideband setup on the tune (how else would you know the cobb toune was super lean and what not)

As for putting my money where my mouth is.. why should i pay for a dyno run on a tune i had dick to do with? If i tuned it i would chip in, hell its only going to help out the guy who had the car, as he will have all the data he could possibly get, from road tuning to dyno runs. (so long he logs both)

I could care less on it seeing a dyno at vishnu, or gruppe s (atp is dead btw).

I just wanted to see what the afrs looked like on the tune, the power looks decent and i am assuming that eds software isnt to far off (depends on the road he was using at the time, as well as other factors).

anyways it would be cool if you could dyno it at gruppe-s, it would prob help Ed out with verifiying the accuracy of his software to boot.

 

I don't know if I mentioned in this thread, but the numbers may be off because my car is a Legacy. While Ed has the data on the WRX like coefficient of aerodynamic drag, he didn't have it at the time for my car. Ed's road dyno numbers are usually a lot closer to the Mustang than mine seem to be. Before heading up to Ed, my numbers on the Mustang were 248 whp. I did go from ceramic coated GP Moto headers to ceramic coated GT Spec headers though, and lost about one psi of boost in the swap. Otherwise though, the car felt identical.

You're right, Ed does put a wideband in the tailpipe while tuning. It was calibrated right before we went so I feel pretty confident that it's accurate, as opposed to ATP's which is what showed my Cobb tuning to be lean. The Cobb isn't what was on my car when Ed had it, btw. I had a custom EcuTek tune w/ my VF22 setup.

btw -- that torque curve is nice, eh? Probably the quickest-spooling VF22 I've ever seen. Most people say it makes 18 psi at 4000 rpm. I'm making just a hair under 19 psi at 3450 rpm.... Still feels incredibly smooth, and it doesn't spike in any gear. Ed spent a lot of time getting it to hit full boost as early as mechanically possible and keeping it from spiking in the process. It now pegs 19 (according to my gauge, which is like 18.6 in real life) dead-on and holds it, tapering to about 16.3 by redline... Feels nice. You can see from the graph that it really does hold power all the way to 7k...

Jeremy

 

Anyone flames in this thread and I'm going to pour sodium into their vaginas, as give them a face hugging.

 

 

OH I FORGET TO MENTION THE BEST PART!!!


Background: the factory rev limiter is a soft limiter. It starts to slow you down before you actually get to the point where it blocks the rpm's from going any higher. It works "preemptively" as it sees your rpm's screaming towards 7150 and starts to slow your tach after you cross 7000, but it depends on how fast your tach is going. Basically it tries to cushion the hit by catching you gradually instead of letting you slam into a wall at a specific rpm.

My car was accelerating so quickly that the rev limiter kicked in at 6400 rpm in 1st gear, 6700 rpm in 2nd gear, and 6950 in 3rd gear . The tach was shooting towards redline so fast that it acted preemptively to the point of being that early!!! In 1st and 2nd, the car would hit a rev limiter and then immediately pull again to redline. The car's thought process was, "oh crap! he's almost here!!! REV LIMITER! Oh what? Wait a minute. He's only at 6400. I'll let him go again."



No joke. Ed had to move the parameters for the limiter. It still cuts off at 7150 like before, but the stock setting has the bottom number at like 6900 where it begins to slow you if you're accelerating towards it too fast. He had to move that bottom number closer to 7150 to keep it from stepping in too early.

I thought it was freaking awesome!!!! My car was accelerating so quickly that the rev limiter freaked out and jumped in early! Never heard of that happening before

btw -- 1st gear is scary as h3ll. With Ed, me, and Ken in the car it was scary. Freaking whiplash. Shaken baby syndrome B). I have a pretty stiff suspension and I have an Anti-Lift Kit on the car. When it hits boost in 1st, the car freaking squats and the nose points skyward ... no joke. It's crazy. Never experienced that before.

Jeremy

 

Damn, you must be puttin down so much torque to get the car to really squat w/ stiff suspension! I think I have made up my mind to get an EJ20 now that I see what is possible... and all that from putting down a conservative 260 to the wheels! Great write-up Jeremy, now I see why you have to put in that BBK