Just wondering if there is a formula to figure out at what point the tires will begin to leave the earth on a launch? If you look very closely on the video I posted, the front of my car rises quite high when I leave the line. I dont think the tires were off the ground yet, but I bet before I hit 11's they will. I measured my front end travel, and when the bottom of the fender lip is exactly 6" above the top of the tire, the wheel is next to come up. I saw a fiero awhile back in a High performance pontiac, or Hot Rod mag, that had a 455 mounted with a toronado transaxle, and it ran 12.20's and pulled the front wheels 6". Anyone have any ideas as to when I should see some sky under my Falkens?

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http://www.fieroX.com

f#@k the naysayers, cause they dont mean a thing...
311

unsure on the fiero's but this last weekend there was a 93 AWD Eclipse at the track that ran a 12.3 and he pulled his front end in the air

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Rich
Sioux Falls SD

86' 2m6 4.10-too many extras to list
92' BMW 325i-cold air intake, borla exhaust,strut tower brace,
97 Eclipse GS-T all stock (for now)

Life is a game that no one wins!!

X,
Try some Drag Shocks with 90/10 (Jounce/Rebound) so that more weight is relocated up higher from the center of gravity during your launch. You do need the low end torque and best method of traction possible with tires. That 455 (Olds longitudinal) is a large block V8 with plenty of torque. Sorry, can't give you a formula. It would be cool to see a 6 cylinder pull a wheely tho.
http://hometown.aol.com/m34chev/zoomies.html

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right !
It is in the suspension,maybe good slicks as well.

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I don't think it is as much a function of HP , as it is suspension

ie banditbalz's 15.2 second stock GT launches nearly as hard to the 60ft as your 12 sec 3.8SC

My damm PIP isn't working , but Im sure someone will post a pic , he has bested 1.8 60 ft times , on a bone stock motor with a set of street tires.

I will get him to post a pic for those who haven't seen it

JM

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Jonathan McCreery

here's the formula :

Fiero + V8 = Wheelstand - 1 axle + 1 hour under the car to replace it

Vigoursly working the clutch while pinning the gas apperently works, but I don't think that's whar your looking for ;-)

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Ottawa Fiero

quote Originally posted by 80's BOY: here's the formula : Fiero + V8 = Wheelstand - 1 axle + 1 hour under the car to replace it

It takes you an hour? Ive got it mastered to 30 minutes now

yeah, i have a ***** of a brake caliper on my passenger side.

When do front tires say goodbye to earth?

When you go over railroad tracks at 50mph!

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quote Originally posted by 80's BOY: yeah, i have a ***** of a brake caliper on my passenger side.

I leave the calipers still attached. I just undo the 30mm axle nut, then knock the axle free from the hub. I then undo the 2 15/16 bolts, and pull the thing to the side and out of the way. Works well. Ive done it once for each side now.

All a question of how much torque you can stick, and how much sag is in your suspension (to move the centre of gravity.) With a high tq and atuomatic (and torque converter ) you may indeed be close-ish.

Most if not all street tyres will give before this can occur (for obvious reasons.) you'll likely need a set of real slicks (not DOT slicks, not R compounds even.)

You're running like 1.8sec 60' times, right? Don't think you're launching wheel-lifting hard yet. May take a high-stall converter. (high enough make the car unstreetable, like 4,000rpm.) in addition to some really soft slicks.

Best!
Ben.

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Ben Cannon
88 Formula, T-top, Metalic Red. (2:13.138 at Sears Point) "Every Man Dies, not every man really Lives"
88 Formula, Northstar, Silver, In-Progreess. -Mel Gibson, "Braveheart"

Ben,
My best 60' yet is 1.741. According to this http://www.smokemup.com/auto_math/60_foot.php I pulled 1.24 G's. Just wondering.

My best 60' time is 1.9 (avereage 2.0) This pic was taken at Toronto Motorsport Park last fall on a completely stock motor. New mounts, underdrive pulley and engine driveline absorber have since been added. Should be in the 14's this season...

Thank god she came equipped with a 4 speed Muncie!

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Silver 86 GT
no truck, no trailer, no spray!

the folks at the car show on Saturday said I lifted a wheel when I left. Personally I'm skeptical, but they swear they saw daylight.

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quote Originally posted by JD86GT350: the folks at the car show on Saturday said I lifted a wheel when I left. Personally I'm skeptical, but they swear they saw daylight.

What kind of 60 foots do you pull? How about ET? Just for comparison sakes.

and banditbalz, im going to try and get some front launch pics like that next time to the track. That looks kickass!

Mine almost come off at launch as well, 1.7X 60' times. They do come up on the 1-2 shift, on the street, I would imagine at the track as well. The 3800SC, with the mods that FieroX and I are running produce massive amounts of low end torque. More than most V8 setups produce at similar RPMS. Aprox 400 Ft lbs at about 2500 to 3000 rpm. My tires barely spin at all on launch, this requires massive weight transfer, very little weight is left on the front end, I have several pics from the last time at the track which show the tires barely on the ground. I don't imagine it will take much more to lift them off at launch. Definately will happen before either of us reaches 11 second passes. My next time to track I'm looking for a 12.3 or 12.4 second pass, might happen then.
ICY

quote Originally posted by fieroX: What kind of 60 foots do you pull? How about ET? Just for comparison sakes.

ahh, wish I knew man, never been to a track. Someday maybe I'll take some vacation and try to get to one. The nearest one is about 3 hrs away.