Good 60ft + shit MPH = good ET??? WHY?

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14-10-2006, 08:28 PM
zco

haha ahmie. your 60ft time is good if you compare to our Front wheel underpowered cars. if you compare it to rwd high powered cars, you're still a noob hehe
15-10-2006, 05:32 PM
luzinit

this is starting to get all too confusing hahahaha

all i know is that tyre pressures do affect your time in some way. it is along the same lines as to why some people run thinner wheels at the back for FF drag cars, less resistance. now if you lower ur tyre pressure, there is a larger contact area with the strip, so i would guess this results in increased resistance and slower time, but better traction for launching. thats my opinion, im only a noob so if i am wrong, dont make me look silly. haha
15-10-2006, 05:44 PM
grumpy rooster

Quote:

Originally Posted by luzinit

this is starting to get all too confusing hahahaha

all i know is that tyre pressures do affect your time in some way. it is along the same lines as to why some people run thinner wheels at the back for FF drag cars, less resistance. now if you lower ur tyre pressure, there is a larger contact area with the strip, so i would guess this results in increased resistance and slower time, but better traction for launching. thats my opinion, im only a noob so if i am wrong, dont make me look silly. haha

They actually run skinny cross ply tyres so that the car will go straight and not want to "wobble" or fishtail at high speed. Running slicks at one end and radial tyres at the other on a car is a recipe for a high speed crash. The skinny tyres do offer slightly less resistance as well.
15-10-2006, 07:40 PM
GnJracing

I thought I'd join in the discussion also...

Tyre pressures aside you'll find Chuck (ALLMTR) is right. After I bought the car off him and put the b16a in it we ran consistent high 13.5's @ 103 on yokhama advans.
Now when we changed to the stickier bfgoodrich's we got consistent low 13.4's @ 101mph and we could never get the mph back with those tyres given the better 60 foots they provided.
15-10-2006, 08:15 PM
.::F[L]Y::.

yep def easier to get good 60ft with RWD cars.
15-10-2006, 09:12 PM
luzinit

Quote:

Originally Posted by ALLMTR

When you load the motor with a good launch, you lose MPH. It's unavoidable.

Hey Chuck, can you or someone who participates regulary in the drag scene explain why this is so? Like why is it unavoidable??
17-10-2006, 09:42 PM
ALLMTR

I can't really explain it, I've just accepted it. Smarter men than I have argued this ad nausium without coming to an outcome.

I've just learned to accept it. People go on about running 100mph and 14 sec times claiming that with a perfect/gearing it would run 13 flat (which is true). The problem is that with a perfect launch it would load the motor and only run 98mph (for example)
17-10-2006, 10:09 PM
grumpy rooster

Chuck is correct. But a good estimate of times can be based on the mph. On a "perfect" run a car will run:

13.0 @ 100mph
12.0 @ 110mph
11.0 @ 120mph
10.0 @ 130mph
9.5 @ 140mph
9.0 @ 150mph

These perfect run figures are what a well set up V8 would run. A turbo car or FWD car will run a higher mph for the same time as a NA RWD.
17-10-2006, 11:32 PM
luzinit

thanks for the info, but still the question remains unanswered.. i guess i'll just have to accept hey? :rolleyes:
19-10-2006, 10:06 AM
Weq

Quote:

Originally Posted by claymore

Whoa a whole lot of posts about an irrelevant subject....... the only numbers that mean anything are your ET and reaction time they win the race mph/kph are in the nice to know category but don't mean anything to the outcome of the race....like who won. Mph/kph can be a useful tuning tool but that's about it. It's who got there first. I wouldn't be worried about my Mph with a reaction time like yours ... get a practice tree and start practicing or at least leave on the last yellow waiting for the green is a loosing proposition every time.

This is very untrue.

Drag racing is a breakdown of your slip. Improving one area has effects on every other area.

OT:
Nice discussion guys...
20-10-2006, 08:28 AM
grumpy rooster

Claymore.

What Weq posted is 100% correct. As you are. You are both correct.
20-10-2006, 10:08 AM
Weq

Quote:

Originally Posted by claymore

Weg this is very untrue........ tell me when a higher mph ever beat a lower ET and or reaction time??? Never happened. MPH is a tuning tool only, change the mph and not the ET and you still lose to the guy with the quicker ET and reaction time EVERY TIME. It's not how fast you are going at the end it's who gets there first. You show your ignorance about the subject of drag racing with posts like yours.

Ignorance. U assume too much for ur own good. Go read my post again, slap urself, and do us all a favour and press ALT+F4.

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