[ReverendDexter]

Originally Posted by 69fastback Regardless of the 60', the trap speed will stay consistent, and it's not trapping like a 400whp car.

This is 1/8th mile; or, should 400hp be trapping faster with even on the short track?

Originally Posted by 69fastback DRs are not like slicks, and typically want anywhere from 16-20 psi to work right. It's still a radial tire, and too little psi will cause wheel hop. You want to run as much pressure as possible to make the tire work. Burn them in the box until get good smoke, then roll out. They like to be hot.

That's odd that they like so much heat. On the other side of the tarmac, street tires usually have to be cooled off between runs or they start getting greasy.

[4.6DreameR]

leave at idle maybe.
I cut a 2.19 60' on 315/35/17 nt555s at 35 psi my first time to the track. <-- stock UCAs/LCAs
Don't dump the clutch, just ease out of it quickly.

[69fastback]

Originally Posted by ReverendDexter This is 1/8th mile; or, should 400hp be trapping faster with even on the short track? That's odd that they like so much heat. On the other side of the tarmac, street tires usually have to be cooled off between runs or they start getting greasy.

I think he should be in the upper 80s range especially at sea level. He trapped a little higher on the worse 60', because it was spinning, and when it spins, of course it creates more wheel speed, which will make it trap a little faster. With the extra wheel speed, and being at sea level, he shouldn't be far off 90 mph.

DRs don't have the same compound a street tire has. They have a soft compound like a slick, and they like to be heated up, like a slick. They don't get greasy like a street tire.

[BaznastyDave]

Yeah he should be AT LEAST very high 80's

[mrbigjeep]

yeah and even that would suck...with 400 you should be able to trap at least 92-93mph

mine traps low 90's and only has 380rwhp...plus its an auto which usually have a lower mph than the 5spd...

dumping the clutch at 2k is not the way to do it. you need to slip the clutch. modulate the gas and clutch to leave as hard as you can without spinning. somewhere between bogging and spinning...

a better sixty foot would help a ton. not only in E.T. but in mph as well...

[Kohrs93]

I pulled a 2.0 60' last night on some garbage 245/45/17 primewell pz900's at 35 psi. You NEED to get those launches and 60' times down and you'll be golden.

[crappy_head]

ok guys ill give it a shoot again this wensday

[Bullitt5339]

Mine traps 86mph with only 266rwhp. You're not getting 401hp to the ground. Even a good launch isn't going to get you where you should be with that mph.

[02gtKev]

I ran a 9.2 @ 77mph in the 1/8 mile when i was bone stock......


That was at sea level.

[Blackbird1084]

Bullit5339 your car has had a lot of weight taken out which is like adding a lot of power. So yours would be a bad example. Here my 04 only made 347 rwhp on a 100 shot and trapped 89 in the 1/8th and was full weight. My TA has a race weight of 3600 and traps 91 in the 1/8th only making 360. My 06 traps 88 in the 1/8th on a 75 shot and ran 12.60@111.44 on street tires(1.97 60ft) and the same shot(should be making 350 rwhp).

[Bullitt5339]

Yeah, but a car making 400rwhp should always trap higher than my car at 2980lbs. There's something wrong with that car. Notice the faster run had the better 60ft, but a slower mph. The other run had a much worse 60ft, but it mph'd better, which is exactly what I'd expect from a car that's spinning off the line.

[Blackbird1084]

Oh no i fully agree that there is something wrong with his car. It should be trapping closer to 93-95 without an issue. If my n/a TA only making 360 can trap 91 in the 1/8 and weigh 3600 then his should blow that away making a true 400 rwhp.

[69fastback]

Originally Posted by Bullitt5339 Yeah, but a car making 400rwhp should always trap higher than my car at 2980lbs. There's something wrong with that car. Notice the faster run had the better 60ft, but a slower mph. The other run had a much worse 60ft, but it mph'd better, which is exactly what I'd expect from a car that's spinning off the line.

A car will almost always trap faster if it spins the tires. It's normal. More wheel speed = more MPH.


My car on DRs went a 60' of 1.82, and trapped 124 mph. On slicks, it 60' was 1.58 and trapped 121, and went almost .5 faster ET.

[Bullitt5339]

Originally Posted by 69fastback A car will almost always trap faster if it spins the tires. It's normal. More wheel speed = more MPH. My car on DRs went a 60' of 1.82, and trapped 124 mph. On slicks, it 60' was 1.58 and trapped 121, and went almost .5 faster ET.

Exactly my point.....

[Blackbird1084]

More wheel spin doesn't always result in more mph. Just as a statement if a car loses to much time blowing the tires off (2.1-2.4 60ft) it usually gains mph. Now in his case (a low 2.0) I think his will drop slightly. My TA's best 60' is a 1.567 and it's best trap is only 112.34. If I blow the tires off(that's what it feels like) and only cut a high 1.7 it doesn't gain any mph. It only loses et. Now that might just be that car idk just my experiance.

[mustanginky]

OP, did you ever go back to the track?

[BaznastyDave]

Look in my sig, I hooked better and got a better MPH but I agree normally the better you hook MPH tends to suffer a little.

[mrbigjeep]

i've never experienced that...i hook better = i mph better

my mph has always been better when i hook. for example, tonight i spun and cut a 1.81. trapped 92.5mph...hooked and cut a 1.62 and trapped 93.6mph

[BaznastyDave]

Your best ET has the lowest MPH though correct?