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Discussion Starter #1
Hi Guys

I've been doing some reading this afternoon around the best way to launch a FWD car on the drag strip. There are still a few blanks in my mind I wanted to run by CIVINFO seasoned draggers.

The general idea seems to be:

* 35psi in rear tyres 20psi or lower in the fronts
* Set rear suspension as hard as possible and set fronts to medium
* Move any weight you can out from rear, or to front
* Do a burn out - even on street tyres

There seems to be a divergence of oppinion around the launch though.

Some articles say stage as far back as you can for max roll out, and set rpms to 2k - 2.5k. Soft ride the clutch at first until you get moving, then fully engage clutch and hammer down.

Then there are those saying they can get consistant 2.0 - 2.1 second times by launching at 4000 rpm and hard slipping the clutch with quite a lot of throttle (maybe they have paddle clutches??)

So the question is - what works for you?
 

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Have you Kpro pal, Find somewhere quiet and datalog the VSS using various techniques over a measured time

when I say quiet i mean your dead grandads unused and unopen to the public airfield
 

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Discussion Starter #4
Have you Kpro pal, Find somewhere quiet and datalog the VSS using various techniques over a measured time

when I say quiet i mean your dead grandads unused and unopen to the public airfield
The problem is the technique that works on the road, doesn't on the strip. Its a totally different surface.
 

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Discussion Starter #12
The Americans vouch for preloading with the hand brake and launching at 2.5k, this seems pretty sensible to me.
 

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Discussion Starter #13
Too little rpm you'll bog down.
Too high rpm you'll spin on the spot.
You need somewhere in between ;)
Pick different rpm to lauch and find what rpm is quickest for your setup.

Add 500rpm increments on the strip...you'll have more grip and probably bog down.
http://www.civinfo.com/forum/engines-transmission/42693-various-tuned-civic-acceleration-tables-4.html#post702841
Not bad 60' for 140hp :lol:
The 60ft time is all technique, the more power you have in fwd the more practice it takes!
 

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I used to do these launches in a single seat race car. It was rear wheel drive. The best launch was to have revs high and slip the clutch, using the clutch to control wheel spin.
 

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Discussion Starter #15
I used to do these launches in a single seat race car. It was rear wheel drive. The best launch was to have revs high and slip the clutch, using the clutch to control wheel spin.
I think this would work well with an uprated clutch, Once I've got my bucket seats in I think this is the next item on the list.
 

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anyone see pinks with the 2.2 honda civic where they got given like 5 lengths head start and where the surface is alot grippier he planted it and totally tore the axle off :D
 
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