Dragstrip Results from the Autotragic 'Vert!

[Stanger007]

Went out for the first time since the supercharger install, had some great weather in the mid 70s-80. Car did really well, ran it exactly how I run it on the street. First pass was a 12.5, second was a 12.3.

I am well outta gear with the 4.10s so I had to shut it down early both times - on the second run I dropped another degree of spark into it (19 up top) and held it into 6100 RPM, let off just before I got to the traps.

The 12.3 run got halfway recorded before the camera ran out of memory so you'll have to take my word on it.

Timeslip:
60': 1.769
1/8: 7.905
MPH 87.22
1/4: 12.387
MPH: 108.09

Video: http://www.youtube.com/watch?v=nA0kYJ8WN88
Tune: http://www.72mach1.com/wp-photos/mustangs/dragstrip/SCTunev18.bin
Datalog: http://www.72mach1.com/wp-photos/mustangs/dragstrip/12.3-Run.csv

 

[drakesdad]

Great runs Wes...

 

[gcomfx.com]

Sweet! Sounds great. What suspension mods do you have?

 

[Stanger007]

D&D "econo" upper and lower control arms and... umm that's it, stock everything else.

Wes

Edit - and I've got MM full length subframes - forgot about them bad boys! Must have on a 'vert.

 

[Mustangless]

that thing is flying. Are you going to change gears? (might could go 11s with 3.73s?)

edit:

I ran a 13.3@105 2.2 60'. My afr is pegged at 7.4 according to logworks , so I believe my maf curve is wrong.

looks like those ets hook good

 

[gcomfx.com]

D&D "econo" upper and lower control arms and... umm that's it, stock everything else.

Wes

What tires? I'm headed to the track Saturday to try the ET Streets out. I may jump to the 125 shot just to see if I can get an 11 sec pass before the season is over.

 

[Stanger007]

Those passes were on the Nittos.

I'll try the ET Streets next time out -- not sure if I am going to drop the rearend to 3.73 or not - the car is 99.9% street. I see I can get a set of FRPP 3.73s for around $110 + ship. I dunno.

Brett, do you still have the LMAF? Was it pegging with the blowthrough setup? My LMAF curve is in the tune above - it is tweaked for my car and was very close for Sam's car when we put a LMAF on his. Also check my 42lb injector settings and battery offsets.

Wes

Edit: Next question is gonna be 3.73 for $110 + ship - WHERE?

Get Summit to price match:
http://stage3motorsports.zoovy.com/...learance.html?cpg=@CAMPAIGN:4311&cpn=12842034

Edit 2: A lot of my speed comes in how fast I am locking the converter, the stock transmission settings leave a lot of power on the table - see the tune/datalog to see what I mean. I also included tranny temps in the logs too.

 

[Killercanary]

Wes, great times!!!

Before you switch gears, make sure you run on the ET streets first, you may find that their height and the fact that they grow a little on the big end will save you from having to buy new gears.

 

[Stanger007]

Before you switch gears, make sure you run on the ET streets first, you may find that their height and the fact that they grow a little on the big end will save you from having to buy new gears.

Thanks Paul, I really don't want to step down in the gearing, I am hoping the ETs give me just what I need to keep the pedal to the floor the whole way!

Wes

 

[Mustangless]

I sold my lmaf before I used it. It was going to be too much trouble to setup draw through. I have a pmas protube now that shows goes up to around 3.7 volts

 

[Pokageek]

NICE!!

 

[Stanger007]

You know, I did go from a white vinyl top to black cloth - that could account for the increase in speed since last time out.

Wes

 

[SQUEEZE&STROKE]

What height are the m/t's and the drag radials? My drag radials were always 26" tall...if that is your case, moving to a 28" tall tire will help your times without changing gears...Which is what paul was hinting at.

 

[Venom351R]

wow thats pretty sweet!!!

 

[Stanger007]

What height are the m/t's and the drag radials? My drag radials were always 26" tall...if that is your case, moving to a 28" tall tire will help your times without changing gears...Which is what paul was hinting at.

Running the #s on the tires, it looks like the Nittos (275/40/17) are 25.66 in diameter. I'm not sure how running various pressures on them affects the tire at higher track speeds - Paul mentioned the ET Streets grow!

Does a 28" tire fit in the fenderwell? That'd be cool.

Wes

 

[Venom351R]

Does a 28" tire fit in the fenderwell? That'd be cool.

Wes

Yeah it does fit, Ive seen other SN95's on here that had 28" tires on them. Im running the MT ET Street 26" tires on mine, didnt want to kill my gearing.

 

[SublimeRT]

Nice runs. Like said a 28" will fit. Depending on what size you get and what size wheel you might have to ditch the quad shocks (if you haven't already) and/or roll the fender lip. Also, a few companies make some 27" tires. That might fit the bill better than a 28".

 

[95Vert]

you can really tell your car has balls. 12.30 at 108, 4.10s are really hurting you up top with those 26s, huh. nice pass and times.

 

[Killercanary]

I don't understand how you are seeing 6100 at 108mph. I'm trapping 7mph more than you and that's the rpm's that I see with 4.10's. Are you blowing through your converter on the big end?

 

[Stanger007]

Converter says it is locked right where I command it right after the shift into 3rd and it stays there the whole time. I also talked with Andre @ Edge about the converter and he said it would be fine, just stall a bit higher than it did before the supercharger, which seems to be true.

Running the calculations 5800 should be 108mph. I run the Nittos at 18PSI all the time and they sag quite a bit, not sure if that is making it a shorter tire.

Here's my theory...
With an auto, when you are high in the RPMs and let off, it's like shifting to a lower gear in a stick on a coast - the engine brakes you. I was coasting into the traps and I was just chopping the throttle rather than slowly getting out of it like I should or dropping it to neutral and getting off the gas (sorta like pushing the clutch in).

So I would bet that I had a much higher MPH but the engine braking effect slowed me down a good bit between the time I saw 6100 and slammed the throttle shut before I went through the traps.

Am I thinking right or waaay off?

Wes