For those who don't know, I put a '00 IM on my '96. So, thinking I was running rich with the larger '00 injectors, I took my car to get it dynoed and tuned today. I went to a different dyno than usual to save some money but it was a Mustang dyno which I have been reading are better for tuning. I was using a V-AFCII for tuning and to control the changeover points for the manifold. Well, to make a long story short, after 1.5 hrs on the dyno, no changes were needed. My initial baseline (after figuring out the changeover) was the strongest pull of the day.

186.4 @ 6600 (HP)
171.6 @ 4400 (TQ)

I will be going to KC at some point and get some runs at the place where all my previous runs have been so I can better compare the MEVI vs. '00 dyno's. I read that anywhere from 8%-15% difference in a Mustang to a Dynojet so hopefully my numbers will be somewhere around 201-214 HP & 185-197 TQ. This is all just speculation at this point but I am very eager to see what kind of Dynojet numbers it puts down. Previous best on the Dynojet was:

183.2 @ 6000 (HP)
180.2 @ 4200 (TQ)

Today was also the Import Drags so I went out not expexting too much since nothing has been done to the car since the last time when I couldn't get anything but 15.0's all night. First run 15.2. I let the car cool and put the DR on and got a 14.9, then a 14.82, then 14.85, 14.87..........and on my final run of the night it came...............Here's the slip:

R/T : 0.7467
60ft : 2.2421
330ft : 6.2126
1/8 ET : 9.5009
1/8 MPH : 75.25
1000 ET : 12.3482
1000 MPH : 85.38
1/4 ET : 14.7841
1/4 MPH : 92.89

 

Got pic of hte graph?

 

no graph needed.. that says it all right there

 

I can't wait till I get it......

 

Travis:

Congrats on the new best! I wish I could have been there. We'll have to run them at KCIR this year to see how we compare.

I noticed your trapspeed has dropped fractionally by going with the 00 IM. From what I can tell, your ET improved because of your slightly better 60', but it looks like the car isn't pulling quite as hard (mph wise) at the 1000' marker. I know that yesterday night wasn't terribly great for racing (humid low 70s). What do you make of slightly slower trapspeed? What were the conditions like when you ran your 14.84@93.55mph? BTW, you're butt-dyno was right, the 00 IM gave you some added torque off the line and it shows.

I'd bet in cooler weather and the traction of KCIR, you could pull out a 14.6@94mph.

 

I thought that mustang dynos read higher than dynojet, not lower?

 

That is what I had read before too. But alot of it has to do with if the correct weight of the vehicle is put into the computer. I also see that mustang dynos usually show power holding on to redline different than dynojets. A stock manifold maxima on a mustang dyno will not show near the drop in power after 5.5K like a dynojet shows.

 

My dyno is on page 3 of my homepage if you guys want to see it. I think they gave me the 4800 changeover instead of the 5200. My 5200 graph was much smoother (power dip wasn't as apparent) putting out 185.8 HP. Guess they gave me this one cause it put out the most peak.

The only thing about the track that was different was probably the amount of gas I had. Last night I was running with about 3/8 tank when usually I have almost none at all. Weather was about the same temp as when I ran my 14.84, don't know about baro or humidity. I did notice my MPH being slower. I'll have to get my old MEVI slips out and do some comparisons.

Everything I read on the net said Mustang dyno's are great for tuning but Dynojets are better for impressing your buddies. The guy at the dyno said add 8% for a dynojet reading and most of the websites said 10-15%. Here's some links:

http://www.hondaswap.com/~pills/mustangvsdynojet.html
http://www.autospeed.com/cms/A_1334/article.html
http://www.mustangdyne.com/Articles/...article-01.htm

I did notice that when the manifold was left closed, the power fall off was no where near what it looked like on the dynojet. Hopefully I can get more conclusive data once I run on the dynojet and put the lines on the same graph.

 

What other mods do you have?

 

Thats what i feel but around 7000rpm and im going to dyno my black beauty in conn in a week or two

 

Is that a typical trapspeed differential for you or other autos with your mods and gearing?

 

My car was set-up like this Fri. night:

JWT Pop-Charger fed cooler air with PR CAI piping to foglight hole
'00 TB
'00 Upper IM
'00 Lower IM w/ injectors
No EGR system
JWT ECU w/ 7k rev limiter
V-AFC set to changeover at 5200 accelerating, closes at 3700 (no fuel changes)
Warpspeed 2.5" Mandrel Y-Pipe
2.5" Test Pipe
2.5" Crush bent b-pipe
'00 Muffler
Mobiletek VB mod & Drop Resistor switch
B&M Tranny Cooler
215/50/15 BFGoodrich Comp T/A Drag Radials on Millenia rims @ 26 lbs.
No P/S
Odessey lightweight battery
H&R's on Tokico Blues

I think that's all the performance mods.

 

ET's are good and the 1/8 mile trap is good, but I just wonder about only gaining 17.5mph in the second 1/8...but I don't know what is normal for auto's with a VI and extended rev limiter. I know that 5spd usually gain 20-21 mph

 

At the drags on 8-9-03 (w/ MEVI), I averaged my 2nd 1/8 miles and it came out to 18.16 mph. I averaged the ones from friday night (9-11-04) and it came out to 18.5 mph. I'm not sure what other auto's experience. Doesn't look like the '00 hurt me in the second half, though.

I know the horsepower is there, but what I'm excited to compare is the torque curve. I think that's going to be where the '00 really kicks the MEVI in the ****.

MEVI '00 VI

 

thats where the 00 vi is better than the MEVI (but still is up top) the reason why my times wouldnt be leaps and bounds over another fast max with a MEVI is because where the 00 vi makes good down low i dont use that range at the track but on the street its great. Ive never had a MEVI but when i dyno soon i will compare with a MEVI pathy dyno to see.

 

Mustang Dynamometer is based here in a suburb of Cleveland. One of their engineers (who happens to have a STi) has said this on one of the local Suby forums:
"A Dynojet Dyno will usually read about 15% higher than a Mustang Dyno does. So if you want to compare numbers, just multiply your numbers by 1.15 to get a Dynojet number."

If that's true, you've got great gains there! Congrats...

 

I've always heard that too. However 214whp and 201ftlb of torque does not equate to 93mph trap speeds even with the drastically poorer gearing of an auto. And BSwith's gearing is pretty good in the world of autos because hes running much shorter tires than stock which makes me wonder what the graph looks like.

 

Its hard to equate horsepower to trap speeds alot of times. I typically trapped 78mph in the 1/8th mile and 97mph in the 1/4 mile when I was an auto. Thats a 19 mph gain. My car only dynoed like 180 whp as an auto.

 

5spd auto

 

I can finally agree with Mike on that.