Trevor's 1/4 mile passes (new results on page 4)

Road race, Auto X, or the Drag Strip

Postby Bimmer » Wed Sep 03, 2008 6:53 pm

congrat`s to 10`sec club. but could you post all mod`s in 1st massage. It`ll be great if Pat will do the same. 8)
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Postby CMS-GT4 » Wed Sep 03, 2008 6:59 pm

He has a project thread detailing what all was done, that is worth checking out.
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Postby LegacyofDan » Wed Sep 03, 2008 7:01 pm

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Postby tjdouble07 » Fri Sep 05, 2008 3:27 am

lumbercis wrote:
The only reason I can think of not to use the two-step is that you may experience more parts breakage because you will be making so much more power off the line. I read in your other thread that you are still on all stock drivetrain parts. Unfortunately, no one has ever two-stepped this kind of power on an alltrac, so we don't know what the stock parts will put up with. But almost all serious turbo drag racers use a two-step. Otherwise you are giving up tons on your 60ft.

The easiest way for you to go faster with your current setup is to get some real drag wheels. You can either blow a lot of money on some bogart aluminum drag wheels or do what the Evo and DSM guys do and get some 15" Motegi Draglites or Rota Slipstreams. You might also consider going to a 26" slick.

The 26" slick should theoretically help with parts breakage if you decide to 2-step. The larger sidewall can cushion some of the shock. OTOH, you will be biting harder which may lead to more breakage. :shrug:

As far as suspension setup, from what I've read, you want to set it up like a FWD car, stiff in the rear and softer up front to dial out squat. Do some reading on the Evo or DSM forums for more info.

I'm afraid you are our guinea pig for most of this stuff. I think the best advice that I have heard is to not change a bunch of things at once, but change one thing at a time and see what makes you faster. If I was making changes I would get some dedicated drag wheels first, then dial in the suspension, then play with the 2-step.

Congratulations on the new record and good luck!!!

J.


Not sure how I missed this reply... Thanks for the advise!

I've just decided to drive the car to the track tomorrow, seems how I'm most likely only going to get one run, and with that being said, I think I'll just run my 205/40/17 h rated street tires at the track, instead of renting a trailer for the one run I'll get just to run some slicks that I only 60 footed a 1.85 with. I'll also hold off on the two step/flat shift until I have a few runs to dial them in.

Either way, in the near future I plan on doing some back to back runs with the slicks and two step to dial everything in. I'm going to take Pat's advise and slip the clutch out of the hole when I do finally use the two step, or I'm afraid the transfer case will not like it.

I also really need to work on my 1-2 shift. I think that cost me quite a bit of time on my first run.

However I do tomorrow night, I'll post results when I get home. It would be pretty cool to say I drove to the track, ran a 10.XX pass and drove home all on 205/40/17 h rated tires! :P
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Postby LegacyofDan » Fri Sep 05, 2008 11:59 am

whats a 1-2 shift?
what do you guys mean two footed?

sorry for my ignorance in the terminology, i swear i'm no where as ignorant as i maybe seeming right now :)
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Postby Meurz » Fri Sep 05, 2008 2:42 pm

LegacyofDan wrote:whats a 1-2 shift?

A shift from 1st to 2nd gear?
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Postby LegacyofDan » Fri Sep 05, 2008 3:24 pm

really?... :shrug:
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Postby smog7 » Fri Sep 05, 2008 6:19 pm

^I think you mean 2 step.
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Postby LegacyofDan » Fri Sep 05, 2008 6:23 pm

well yeah...whats a "two-step" too? lol
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Postby turbo4wd » Fri Sep 05, 2008 9:25 pm

Meurz wrote:
LegacyofDan wrote:whats a 1-2 shift?

A shift from 1st to 2nd gear?

Bingo.

As for Two-Step, or 2-Step.. here's how AEM describes it:

"The EMS gives you the ability to define a secondary rev-limiter, commonly called a 2-Step limiter (Full Throttle, Clutch In, you use both feet, 2 step, get it?). With a user defined RPM value and Cut %, you have the ability to tune your launch to suit the track conditions."
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Postby lumbercis » Sat Sep 06, 2008 1:33 am

Or put in layman's terms, a 2 step is a device that lets you build boost off the line in a turbo drag car by holding the car at a preset rpm. Once you launch, the 2 step turns off and you return to your normal rev limit for the rest of the run.

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Postby LegacyofDan » Sat Sep 06, 2008 2:34 am

ah cool :)...thats pretty damn slick lol...thanks guys :D
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Postby Bimmer » Sat Sep 06, 2008 8:29 am

Trevor, what kind of gerabox do you use? stock? upgraded?
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Postby tjdouble07 » Sat Sep 06, 2008 3:00 pm

I'm running a stock tranny, w/ Royal Purple gear oil.

Well, unfortunately I didn't get to run last night. I drove the car 40 miles to the track, and within the last few miles of the track, developed a bad oil leak from my oil pump/front main seal area. I got to the track with a trail of oil following me, and I was 2 quarts low in oil. I just put in a new 99 Camry pump a few days ago, as they have a little better oil flow, and it didn't leak a single drop before this. So I'll have to pull the lower timing belt cover and see if I can figure out the exact source of the leak. Most likely I will be changing my PCV system, incorporating a big breather filter, instead on my exhaust scavenge, as I feel crankcase pressure under 34 psi of boost is the cause of this leak, or at least a contributing factor... Either way, it will probably be next year before I get back out to the track...
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Postby darthripley » Sat Sep 06, 2008 10:22 pm

that's a real shame tjdouble07, i was looking forward to seeing another pass from you :(
but at least the motor didn't get starved of oil & blow up - that would have been tragic!!
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