Quarter Mile Estimate

[gt_diesel]

Yes, I do realise that these cars are not really made to be quarter mile runners and it is hard on the clutch... etc.... But here it is, I am going to be heading over to the Drag Strip with my brother next week and want a rough estimate on what my car might run before I get down there. I know there are some limiting factors like traction, and keeping the turbo spooled up between shifts. I did drag race for 10 years so I am fairly confident I can get some decent numbers..... So here are some specs on the car.

It is an 86 911 Turbo and is pretty light weight... It has no carpets or anyting inside, just bare metal and some racing seats. It has a full roll cage which does add a little weight. The fenders, hood, and trunk lid are all carbon fiber. There is no stereo or speakers in the car, no AC, no heater... etc. It has Kenesis wheels which are pretty light. It has a 930 four speed trans, all new syncro's, racing clutch, stock gearing in the rear. It has coilovers all the way around.

The engine is 3.4 liters, Mahle Cylenders and Pistons, Heads have been ported and polished. It has group B cams, K27s Turbo pushing 1.1 bar, Big Intercooler, Oil Cooler, Stainless Headers, Stainless Exhaust, big BOV... It has a mechanical fuel injection, and Air Fuel Ratio's have been checked to ensure it would not lean out. I realize EFI would be a better way to go. It has a crankfire programmable ignition and all kinds of other goodies. The motor should be comparable to somthing between a Protomotive Stage 3 and Stage 4.

I have asked some questions about the car on the site before. Also, here are the latest and greatest pictures.













The car is more setup for road racing then anything else, but I still think it would be fun to take it to the drags.

[gt_diesel]

Almost forgot..... Compression is 8.3 to 1

[rouxroux]

You answered your own question in the 1st sentence. Do whatever you want with your car as long as it makes you happy. Maybe later you can gt your brother on a road course or an autocross event. 911 drivetrains are not really intended for drag racing....Do you really want to make a race horse plow a field?

[bell]

the rule of thumb to not destroy your tranny/clutch at the strip is to have a "gentle" launch (i.e. don't rev the hell out of it and drop the clutch)....don't try to do a burnout.....etc.
treat it like you're sitting at a red light and have fun...shift smooth

[Scott at Pelican Parts]

Nice car. Let us know what times you end up turning at the strip.

[rdrr]

I did a drag event recently and it was hell on the clutch (massive slip after a few runs). Don't do burnouts and try to let the car cool for a while between runs.
The times I saw at the event were around 12 seconds for 996/993 Turbos and low 13s for 930/965s.

[gt_diesel]

A friend of mine has a 87 911 Turbo with a lot of the same stuff as mine, only his is still all street trim with ac & such. He is running a 3.3 liter Protomotive engine with a K27, 7.5 to 1, 1 bar of boost. His heads are ported as well, and has slightly smaller cams than mine. He claims 11.70's with his car. He does have the G50 5 speed though, I am not sure how much difference that would make. I believe my car "should" be pushing as much HP as his, and a definate weight advantage.... We will see what happens and I will keep you posted when I run it. I would be happy with 12's considering I will be taking it easy off the line and not beating on it too badly... 11's would really make my day....

[gt_diesel]

What would you guys guess on weight of the car as well? They have scales at the track, but the last time I was there, the scale shack was closed. They may only have it open for big events.

[klaucke]

Weight guess? 2900-3100 lbs. G50, big brakes, big wheels, stock bumpers, turbo motor etc are all heavy.

EDIT: I misread the above posts, I thought you had a G50 and didn't realize you had all the CF parts. I think Yasin's quote is more realistic.

[pwd72s]

Originally posted by Scott at Pelican Parts
Nice car. Let us know what times you end up turning at the strip.

I'll guess high 13's...

[slow&rusty]

A complete bone stock 930 is 2950 at the scales on half tank, here is proof, look at the digital readout on the building (this is my car)


My guess is you are close to 2700 with the cage and all those CF panels (where did you get them out of curiousity?)

Hp is in the 400-430range...that equate to well in the 12s

Beautiful car!!

Yasin

[pwd72s]

we'll see what the timing slip says. If I have to get even more exact? 13.8...my guesstimate.

[JeremyD]

upper 12's if he get's the revs up the first time and shifts well - mid 13's and a new clutch after a few runs.

[gt_diesel]

If it only runs 13's I will be severely dissapointed.... My brothers mustang runs 12.20's at 118mph... The Porsche walks all over the mustang on the street.

Bone stock 930's at the local Porsche day were running 13.8's

Maybe I am wrong, but I would think the car will run EASILY in the low 12's.

[gt_diesel]

I have the paperwork at home for the carbon fiber parts, but I dont remember who makes them off the top of my head.... The car was built by Lindsey Automotive in Louisiana. I will have to take a look when I get home from work to see where the carbon panels came from.

[JeremyD]

let us know - how you do - not many drag the porsches - they are not really made for it - fried clutches - broken 1/2 shafts - disintigrated trannys - at least the 930 box is pretty sturdy - stock though it's gearing is pretty high for 1/4 mile times -

Now take your brother to an autocross or even better a DE event and easily walk the mustang.

If you have been drag racing for 10 years, you may be able to get into the low 12's.

[cegerer]

Scroll down to Porsche section:

http://www.albeedigital.com/supercoupe/articles/0-60times.html

[ZLP]

You can get 11's if you really beat up the car. You will easily hit 12's walking it out of the hole.

[ZLP]

BTW my 930 was 2500lbs on corner balance scales before I put in the autopower roll bar....

[RarlyL8]

1.1bar with CIS is pushing your luck.
My car weighs 2700 pounds full of gas and tools. The engine is not as modified as yours but the 915 gives me a gearing advantage. With a soft launch she ran consistent 8.5's @ 90 mph in the 1/8th mile. That's probably in the 12's for the quarter. 60 foot times were a dismal 2.2 seconds.

You'll be in the 12's.