launching with DR's and 3.27 gears

[bluesnake01vert]

I have a question:

Is there any danger with launching on drag radials, stock 3.27 gears, and the 5speed?

I have seen people do it but have also had people tell me not to run DRs or slicks unless I add gear to the car or things will break.

What's the scoop?
anyone out there doing it?
Anyone have parts breakage due to running that combo of 3.27 and DR?

essentially I want to limit the amount of gear I put in the car to only what's necessary to not break things when I go to the track with DR's. It's my daily driver and covers a lot of miles.

Thanks in advance for any info

 

[soccerman002]

It's not so much the gear as it is the stock bushings in the IRS, wheel hop is what breaks things.

Good bit of info. to read through:

http://www.svtperformance.com/forums/new-edge-cobras-51/213384-irs-tech-article.html

 

[black4vcobra]

As stated above, wheel hop is what breaks axles. If your rearend starts hopping, get out of the throttle for a second.

Not to ruin your fun or anything but I would be very careful about abusing your DD on the track, plenty of cars get broken out there and it will suck to have to walk to school/work!

 

[snakeraper11b]

As stated above, wheel hop is what breaks axles. If your rearend starts hopping, get out of the throttle for a second.

Not to ruin your fun or anything but I would be very careful about abusing your DD on the track, plenty of cars get broken out there and it will suck to have to walk to school/work!

Just plan ahead and get the metro schedule beforeeee you hit that track, that way you wont be stranded. Public transit FTMFW:rockon:

 

[Double"O"]

gears have nothing to do with breaking shit lol

avoid wheel hop, find a good launch rpm to avoid bogging, avoid wheel hop, find a good way to slip the clutch out to get the best launch you can (don't just dump it), avoid wheel hop

 

[Jamie R.]

Ahhhhhhh, my specialty! Launching a 3.27 with a dr takes some considerable clutch slippage not a clutch drop. I ran a best of 12.81@108 with the stock 3.27 gear & 275/40/17 mickey dr's & a 13.08 on the stock 245 street tries & stock 3.27. I'd start with reving it up to 3 grand and slip it out for a starting point but you might have to go higher. When I made a good pass I could smell the clutch:lol1:

Jamie R.
'01 Silver Cobra on the Cover of MM&FF's August '07 Issue

 

[TBCobra]

Ran my car at the track once and launched on dr's with 3.27's but I only launched at like 3k at the most. It bogged a tad but then took off. I wouldnt launch any higher than like 4k.

But like others said, if it starts wheel hopping get out of it immediately.

 

[ninty9cobra]

my car has ftbr kit and kenny brown forward torque brace was launching at 5200rpm with mickey thompson dr

 

[Brutal Metal]

I'm getting these for my 3.27 5 speed combo! Bias ply sidewall NOT stiff!
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

 

[Double"O"]

oh i do recommend a billetflow diffbrace no matter what your power level

i noticed with my Kenny Brown aluminum diff bushings, MM poly subframe bushings, billetflow diff brace and MM FLSFCs my cars tendancy to wheel hop was greatly reduced

 

[bluesnake01vert]

Thanks for all the input. I have the FTB kit and billetflow brace in the car so hopefully my wheelhop woes will be in the past. I have raced my 02 GT on street tires and had a best 60ft of 2.01 launching at 3K with a little bit of spin and a little bit of clutch but it (or I lol) wasn't consistent so I thought of going to DRs with the cobra. All the other racing I've done was with purpose built cars with automatics, slicks, and steep gears so I was worried when I heard that -
"launching a heavy car with stock gears on slicks is a recipe for breaking transmissions"
So you guys with 3.27s haven't run into this?

My only goal is to get the cobra into the 12s so I can race the 13.0 and slower class once in a while.

 

[bluesnake01vert]

Jamie R. - What mods did you do to get then 13.0 and 12.8? I haven't done anything to mine yet beyond the IRS work.

 

[Jamie R.]

My car made 300 to the tires at the time. Mods were: JLT CAI, Bassani Stainless CB, Bassani Stainless Catted x pipe, Fidanza Al Flywheel, Custom tune on the dyno, Steeda Springs, Steeda Shifter and thats pretty much it. My first pass ever was a 13.50 & by the end of the night I had ran a 13.20 all on street tires & untuned. The biggest thing is ya gotta get it off the line without bogging it, cause a bog will kill the car. Rpm's will be your friend & a clutch slip will also be your friend. There is no reason you should'nt be able to run a 13.0 to high 12 with dr's. A al flywheel will help transmission life because you end up taking a load off the crank and so much shock on it.

Jamie R.
'01 Silver Cobra on the Cover of MM&FF's August '07 Issue

 

[bluesnake01vert]

Thanks Jamie R. I'm going to pull the SLP catted X off the GT before I sell it and put it on the cobra. I've got the JLT CAI and an alum flywheel but don't have them on yet, Will do the flywheel when I do a clutch.
What clutch were you using and what were your 60 ft times with street tires and DRs if you remember?

 

[Double"O"]

OP i was launching 3.27s with 468RWHP/414RWTQ on DRs for a looong time and broke nothin in the driveline

i did kill a clutch though...that was just lots of beating that did that though

 

[Jamie R.]

I'll have to find my folder with the time slips for a exact number but from memory my 60's were in between 2 teens & 2.0's. The 12.81 pass was a 1.88 if I'm not mistaken. My 60's were never stellar and I guess that was from me easing the car out slipping the clutch. Heck I never even did a burnout:lol1:! I would go around the water box and then would back up then pull back forward to line up and go.

Jamie R.
'01 Silver Cobra on the Cover of MM&FF's August '07 Issue

 

[bluesnake01vert]

Thanks again for the info everybody, soon as the track opens back up I'll post some times

 

[Brutal Metal]

OP i was launching 3.27s with 468RWHP/414RWTQ on DRs for a looong time and broke nothin in the driveline

i did kill a clutch though...that was just lots of beating that did that though

What type and size drag radials on what rims?

 

[Double"O"]

What type and size drag radials on what rims?

275/40 17 nitto DR or a 17x9 chrome FR500

 

[Brutal Metal]

The 555r's?