13bmx5,

No I don't have a Borla Exhaust. Based on your description of the exhaust sound, is it safe to assume you have a Sedan?

As for your car's MREV power gains... the dyno chart you posted shows a major increase in torque between 2800rpm and 6000rpm. Your mean average (area under the curve) torque number is way up. The torque around 4400rpm has increased by 25 or 26ft-lbs. That's a significant increase in real world on the street power. As for your horsepower, the mean average HP numbers are also up with the horsepower gains at 4500rpm around 6.


Cheryl,

Well said. None of the numerous N/A AT Gs or Zs I’ve driven could break the stock sized or larger tires loose from a 3k-4k roll in any gear, including first. Of course the conditions were with the car tracking straight on a clean, dry asphalt road. Also none of the AT cars I've driven could chip, much less smoke, their tires from first to second and that includes the four Supercharged AT cars I've test driven. I believe the reason for this is a combination of the AT's famous slow shifting and the fact that significant timing is pulled when the AT shifts gears. My car pulls 20 degrees or more timing at full throttle when it shifts from first to second. I plan to do more testing in this area someday.

While talking about AT G35s, Gurgen’s PE TT (previous build) with 450+ ft-lbs of torque and the prototype SGP valve body allowed him to spin his tires pretty much anywhere he wanted in first, second and third gear as well as when shifting between these gears. Of course his 3:54 rear end gears also help him smoke the tires at will.

Another car I'm looking forward to getting next to is Eagle1's newly built JWT TT Coupe. The mean average torque is astounding for 12PSI. With 385ft-lbs of torque at 2000rpm, 566ft-lbs at 3700rpm and 400ft-lbs remaining at 6300rpm this car should (will) be a monster.


DaveO

 

My fault, it was DaveB's exhaust.

 

The runs were made in 4th gear and they were "best ofs". The other runs were within a few hp or the torque numbers did not read properly. I did the install on the dyno, the car was never unstrapped. I did not do an ecu reset. My pulls were made to 7k on the tach inside the car, I did not let it hit the rev limiter. The only way the dyno will read 7k is if you let the tach read 7.3 to 7.5ish.

 

Honestly though, I should been more detailed in my statement, however Russ doesn't believe a thing I post so I figured why bother. What I say is very much true. Find me an asphalt covered street here in KC, dry conditions, and sub 40 degree weather and chances are I will spin the tires in 1st from a 4K roll. My G has still has the EL42s too. On a concrete surface, then the answer is no. Concrete has way too much grip. From a stop and a brief 2400rpm stall launch, it's quite easy to keep the tires spinning through first. If I'm good, I can keep the spinning in 1st without banging the limiter or getting a premature shift into 2nd. In colder air, I can't stall up the converter if I want to leave the line hard without roasting the tires. It's a lot of fun to have the tail going to side to side as you're accelerating (reminds me on my old 94 Z28), but it's just not something you want to do in traffic. On the track or on the street 70 degree+ weather, the EL42 will either spin barely 5 feet or make a brief chirp with a 2600rpm stall launch.

All in all, my point was suggest to Russ that road surfaces, tires, conditions, etc play a huge role in the way a tire behaves on the street.

 

Yes the conditions certainly play a role in such things. However, I still think you are spouting utter bullsh!t. If you prove me wrong then I will gladly own up to being wrong - but you're gonna have to *prove* it. I've said before I will give someone their due but only if I have reason to believe it truth. Hell, I'll even pay for your gas to bring that baby over here and show me! You come on the extra hour to B'ham from the track and we can find you any sort of road surface you want.

 

No you said your buddy with 285s wouldn't spin he just plain gripped. You said basically everyone with 285s or any brand of tire and condition would not SPIN. Basically you are saying all tires are created equal! LOL

And I have yet to see any automatic 03+ spin the tires from a roll at any rpm or speed. I have had many loaners and currently a 06 loaner I am driving right now I even tried it on several times. It couldn't even chirp them at 3k-4k slamming the gas down in 1st.

6MTs have no problems spinning 1st or 2nd gear on rolls.

If your car does it, its one out of a mil. Make a video and prove it!

 

Um.. can we take the tire spinning talk to another thread? After all, this thread is all about ME

I'm leaving work early(in about 30 mins actually) to go get the car dyno'd. BAck in November, I had a best 4th gear pull of 250/227(seems to change every time I open winpep). Then in December(with the muffler), I had a best 4th gear pull of 241/222. I don't want to go into all of the differences here, but anyone have any guess of my numbers for today?

Based on November's numbers, I'm *hoping* for 260/243. I'll post results when I get a chance.

 

What did you add exactly? I assume the catback and the mrev right? If so, my guess would be...... 255hp 250 tq.

 

Believe what you will. I have nothing to prove to you or anyone else for that matter. What would be the point of me lying about this anyway? I'm apparantly one of the few in here that thinks spinning tires is an absolute worthless way to prove the power of a car. Hell, my 106hp/100tq 90 CRX Si would roast the tires on a launch and going into 2nd. That feat neither meant the car was fast nor powerful.

I'll be at Steele and/or Silver Dollar Raceway in the Spring, but I'm not guaranteeing any tire shredding shenangins


You missed the point as usual. Why should I bother explaining it to you?

 

No I didn't miss the point and neither did others that I have actually talked to.

Here is what you said:

"Are you sure you're not bending the truth here a little? It seems rather hard to believe unless you're on a loose or wet surface. A 240rwtq 3,500lb rwd car in 2nd gear at 3K lighting up the tires. Even my friend's 04 Cobra with 400whp can't "light them up" from a 3K-4K roll. His 285s (not DRs) simply plant and go. Same goes for my friend's 385whp 02 vortech'd GT with 4.10 gears."

Your saying that our car is the same as a Ford Cobra, oh and with tires that are equal to our tires? So your saying all tires are equal. Then why don't we just go buy pep boys tires since they are all equal so we can all get the same traction.

You are missing the point or you are obvious really dumb.

Again why are you mentioning spinning tires off the line? I mean for god sake a tricycle could do it. We are talking about a rolling start slamming the gas down. And no, your CRX SI could not do that as well unless you had some crappy tires on it. I have friends that have B16 swaps in them, and they don't lose traction doing the same thing.

No, why not bother not posting more utter BS as usual?

Damn why do we waste our time guys with him? lol

 

And I like to make a post that I need to get off my chest.

#1...

DaveB you have only but argued on this site. You have never given any helpful technical information to anyone yet that was true and not misinformation. You argue with people saying that the facts are not true even though they have data backing their claims up.

#2 ....

I will give you props where they are due. You are a good drag racer. I will admit that. You know how to drag a car and how to properly set it up to get some good times out of it. But in the mechanical area of where the car is concerned and what makes HP/TQ with little tweaks you need a lot more education in.

I am done here, because I know where this is gonna head. I am just sick and tired of the utter bs that keeps getting posted.

 

I don't know what your point would be in lying about this. Why does someone I know lie and tell me that she paid half of what I know she paid for something? People do things for less than good reasons all the time.

I never claimed that spinning the tires was proof of the power of a car. You made a statement about *your* car and I am disputing that statement. You stated again that your car was capable of said tire spinning. I gave you an invitation to prove that. Does it make a difference to me whether you do so or not? NO. I know that you are moving out our way and talked about coming to the track we use. I am giving you a chance to prove your statements if you choose to.

Now I do disagree with your statement that power has nothing to do with being able to spin the tires. I don't think it is a gauge by which to measure power but I think it is intellectually dishonest to say that power has no effect on the ability of a car to spin the tires.

 

Bad and worse news.

The bad news first. I have no dyno graphs. I left right when the garage was closing, and apparently the dude forgot to email me the run files.

Now the worse news. I'm not making any power. I making maybe 1 or 2 more lb-ft of torque between a very narrow rev range, like 5k to 5300(can't remember because I don't have the charts in front of me). Everywhere else, I lost power. Down low. In the middle. Up top.

When I say lost power, I mean in comparison to the November runs. I'm pretty sure I might have lost a little power compared to my December runs as well, but without the charts, that's pure speculation.

The thing I noticed, my friend noticed, and the two dyno guys noticed was the fact that I'm running lean. Mega lean. Bolemia lean. I'm in the 15/16 range well into 5k rpms, and I drop into the 14s somewhere around 6k.

A few obversvations, without the graphs handy: my torque signature looked almost identical to my previous runs. It dipped where it should have, and spiked where it should have, compared to the pre-mrev/exhaust profile. I didn't see a huge jump at 4500 like everyone else. However, around 4500rpms, my a/f REALLY leans out, like high 16's.

So, I've got an air/fuel problem that I've got to fix. The first step is to perform an ecu reset(done this evening after I got home). Next is to swap out the crawford cats for the stock cats, then dyno. If it's still not right, the next thing to do would be to go back to my stock exhaust, and dyno again. Beyond that, I don't know what to do except for a piggyback ecu.

It's really frustrating. It seems that contrary to what I stated earlier in this thread, I am indeed the only person with the mrev to not see big midrange gains. Now I've just got to keep myself from getting depressed, and have some patience and figure this **** out.

I'll post up the charts whenever I receive them.

 

The thing I noticed, my friend noticed, and the two dyno guys noticed was the fact that I'm running lean. Mega lean. Bolemia lean. I'm in the 15/16 range well into 5k rpms, and I drop into the 14s somewhere around 6k.

That's very baffling to me. That is way lean to make any power. May I suggest a PM to DR. DaveO. IM sure its something simple. I have always felt that an exhaust system would make the engine run richer on a VQ. IM thinking your fuel pump may not be putting out the psi your system needs, Is your gas cap venting right?

 

I believe it has to do with not resetting the ECU or the Crawford Cats. I would reset the ecu and remove both cats and see how the car does.