HP required to roast the tires

[dean]

I have a stupid question.

How much hp is required to spin the tires? I have a 3.0L 930 motor coupled to a 915 and I can't break traction unless I abuse the clutch.

So who can roast the tires just by stomping on the gas. In the dry. And how much HP do you have?

Silly but that is my goal
Thanks

[cstreit]

My PREVIOUS motor in the 930 would do it in 2nd gear, no clutch...

I dunno what the horespower was, but that's why I'm on another motor. I estimate the car was running about 1.2-1.4 bar (long story, bad boost guage and wastegate ciombined) with a K27, headers, and modified intercooler... Guestimate about 425 or so, more, I dunno. It lasted 2 years that way though...

A stock 3.0L us turbo won't break the tires that easily...

Build the motor (or buy narrow hard tires )

[juan ruiz]

It depends on the combination I give you and example with my car

Stock at 217 hp I could break them loose at 1 and 2


With a Turbo at 277rwhp still at 1,2 if i try hard I can hear it on 3


With 505rwhp I cannot break them loose,custom clutch and the combination will not allow it , sure if I dump the clutch at 7,000rpm it will happen,But I know that if you (Roast them) it looks cool but you want your power to go to the ground without losing traction and that will mean that the car will move preatty damm fasssssssssssttttttttttttttttt

Of course that is my 0.02

[ZAMIRZ]

I can't do it in a straight line in the dry (God knows I can do it in the wet though) but throwing ass and pulling donuts in my 3.0 liter euro naturally aspirated 911SC has never been a problem. This car loves to do donuts and I use absolutely no clutch, just rolling at the bottom of first gear and give it some abrupt gas while making the turning radius tighter and it'll start spinning.

later,

amir

[obrut]

My Kremer930 has about 370 flywheel hp and will break traction (245 rear tyres) on a dry road in 1st when you floor it and will continue spinning with a quick shift to 2nd (never tried to do it in 3rd).

My technique for annoying ricer's is to drive next to them at 50-60kmh in 1st and then start spinning the wheels...

[A Quiet Boom]

Ok, I'll bite

Depends on gear ratio and weight as well. My Carbed and headered 3.0 (est. 225 HP) with a 7:32 R&P and 2100lbs will roast them with a light clutch drop from about 3000rpm, it'll bark them from a roll in second as well. But a juan put it roasting the tires is rather pointless if the goal is to go fast. Also it's torque not HP that spins the tires and the more you have at a lower rpm the easier it is, look a a bone stock 5.0 Mustang 225HP, 3200+ lbs and it'll roast them in first, second and third. Why? low rpm torque!

[island911]

yep, Depends on gear ratio, weight and its' distribution, coefficient of static friction (tires on surface), engine torque, and how quickly it's applied. The rise time will effect the weight transfer.
This is a classic engineering (dynamics) problem for students.

[kringer2]

I can do it in my 74 2.7L. A little cluch 3500rpm launch. All at 6000 feet above sea level.

[Two Oh]

Originally posted by Blown
I have a stupid question.

How much hp is required to spin the tires? I have a 3.0L 930 motor coupled to a 915 and I can't break traction unless I abuse the clutch.

So who can roast the tires just by stomping on the gas. In the dry. And how much HP do you have?

Silly but that is my goal
Thanks

Blown, I can. My 69 T will spin the tires to redline on a roll at 10-20mph. Popping the clutch on take off is not needed.

I take off in first, get up to 10-20 mph, gas pedal to the floor, instant tire spin and in a moment I'm at 7300 rpm, roasting my back tires.

Tires are 205 16 Comp TA's.

When I had the old 14 inch Fuchs on the car will regular skinny tires, I could cruise at 20-30mph in second, gas pedal to the floor, instant tire spin.

All of this tire spinning is done in a straight line, no turns.

This is what I really dig about an early 911. Light car, lots of power can be had and they handle. Like a big go cart. With a pretty body!

How much HP do I have? I really don't know. This is a new engine and hasn't seen a dyno yet.

But, I've been timed 0-60mph in 4.9 seconds. And I have a full interior.

Also, I replied to a post by WydRyd Which is now on the first page. Titled, "Audio of Two Oh's 69 T" Down load the audio and you can hear my "old" engine. It's not too exciting and kinda short. The last recording is some tire spin in first for a short moment.

The engine in the recording is a 2.4 with a few tricks.

My present motor is a 2.7

Like I said before, some serious horsepower in an early 911 is an absolute hoot. Every time you drive it you think your'e in a race car. Ask anyone on this board who has a worked 2.7 in an early body if it isn't the most fun they ever had.

[74911s]

don't just think hp think hp and lbs

not my car but i have been in a 69 rs clone with a 3.6, that the owner swears is stock , that easily breaks it loose in 1st 2nd 3rd and i have been told it will even break em loose in 4th and 5th with a cup car control unit.

my guess would be this car is 2200 lbs with 340 hp maybe

[Jack Olsen]

Not having a limited slip helps, too.

[YTNUKLR]

My friend and I were coming down the freeway in 4th gear in his '69 Camaro, he downshifted and floored it and it smoked the tires. Feels like a 993TT accelerating. Runs like a 12.1 in the 1/4.

[Dantilla]

If you want to spin the tires, replace them with skinny Sears Roadhandlers. The tire is as important a factor as horsepower.

[Victor]

One word:

Bleach

Pour some on the road and let 'er rip. Makes a 10HP Datsun 120Y look like Big Daddy Don Garlitz.

[A Quiet Boom]

Originally posted by YTNUKLR
My friend and I were coming down the freeway in 4th gear in his '69 Camaro, he downshifted and floored it and it smoked the tires. Feels like a 993TT accelerating. Runs like a 12.1 in the 1/4.

I'd rather try a 650 HP small block Ford! high gear on the freeway 70mph, no downshifting, just floor it and instant tiresmoke! Of course getting sideways at 70 plus in a car only designed to go straight isn't all that wise so now I confine it to slicks and a dragstrip. Tiresmoke? dump the clutch at 5 grand in second gear with the front brakes (line lock) locked! more like tire inferno but that's exactly what's needed to hook of the line.

So what's the next topic? wheelies! they is fun! hehehehe

[JackT]

Its my experience that it takes low end torque more than horsepower. I have a BMW with a V8 that will smoke the tires in 1st without dropping the clutch. I have a 1966 Corvette big block that will smoke the tires in 1st and 2nd without dropping the clutch, the corvette has pretty skinny tires on it. Both cars have alot of low end torque.

[930Chas]

I don't think anybody can roast tires in a stock 930 from a standstill by just stomping on the gas. You'd have better luck in a Kia. No boost, no power, no roast. With the power I have now shifting from 1st to 2nd, and 2nd to 3rd my 295s will swing out before the lsd kicks it back in.

[cegerer]

"Blown, I can. My 69 T will spin the tires to redline on a roll at 10-20mph. Popping the clutch on take off is not needed.

I take off in first, get up to 10-20 mph, gas pedal to the floor, instant tire spin and in a moment I'm at 7300 rpm, roasting my back tires. "

Ditto here! Fun stuff. But my 65 series tires help. -- Curt

[dean]

What prompted me to ask this question is that RarlyL8 said that he can spin the tires and Juan said he can't. So I was trying to figure out why. In those two cases it must be when the torque comes in. Rarly's must come in earlier.
I wanted to upgrade the turbo to a k27 this winter but only if I have the funds. That should help me reach my silly goal. I am ugrading the clutch right now.

I would like to hear from some more 3.6 conversion guys

Thanks for all the reponses

[juan ruiz]

From my case thats exactly was happening,Why will I want to spin the tires? I want her to move and move foward and fast
I want ALL the power to the ground,well thats my case anyhows as the other guy sits and spind I go bye,bye