[Topic Split] Does spinning = higher mph in the 1/4

[Greg03Cobra]

I was going to do the solid but chose to keep the IRS around Thanksgiving. Really seeing Broke run at track day is what made my mind up. I beleive when i get all the bugs worked out on my car & learn to drive it right i will be in the 10's no prob. How hard was it to install the bushings & brace on your car?

[TheJeanyus]

Both were sort of a PITA honestly. IIRC, the IRS bushings took about 9 hours - no joke. Lee and Brian can vouch for how much it sucked. The brace wasn't nearly as bad except that it's nearly impossible to get to a couple of the bolts.

ETA: I think we're going to need another thread split.

[rtusnake]

Originally Posted by TheJeanyus

Both were sort of a PITA honestly. IIRC, the IRS bushings took about 9 hours - no joke. Lee and Brian can vouch for how much it sucked. The brace wasn't nearly as bad except that it's nearly impossible to get to a couple of the bolts.

ETA: I think we're going to need another thread split.

I'm going to install the slp line lock next week so I will let you know how much more a pain you will be looking forward to

[TheJeanyus]

Originally Posted by rtusnake

I'm going to install the slp line lock next week so I will let you know how much more a pain you will be looking forward to

I really need to get mine installed.

I'll be installing a JLT and MAF Xtender tomorrow. And hopefully the new tunes that Ed wrote for me will take care of my detonation problem in cold air.

[coupe]

Not a very good comparison because none of those were all-out pedal-to-the-floor runs.

No, it was an excellent comparison.

Better hook, higher mph out the back door.
Physics.
Not magic.


And more proof (my car):

Slicks:
1.9 60' - 12.95 @ 107
1.8 60' - 12.74 @ 109

Earlier that year on radials:
2.3 60' - 13.65 @ 105
2.1 60' - 13.55 @ 106

[Italian LX]

Originally Posted by coupe

No, it was an excellent comparison.

Better hook, higher mph out the back door.
Physics.
Not magic.

If you don't use full throttle during the entire run, then you're not using the same amount of power and the comparison is no good.

If we went by that, then I could do a complete half-throttle run and be hooking the whole way and I can guarentee that my mph would a lot lower than the full-throttle run spinning through 1st and 2nd. :P

Originally Posted by coupe

And more proof (my car):

Slicks:
1.9 60' - 12.95 @ 107
1.8 60' - 12.74 @ 109

Earlier that year on radials:
2.3 60' - 13.65 @ 105
2.1 60' - 13.55 @ 106

Proof?

I've had difference like that at different time os the year with the exact same combos!

. . . it's called weather changes. Comparisons need to be on the same day for them to mean anything to me.

[slvrbullit]

Originally Posted by coupe

No, it was an excellent comparison.

Better hook, higher mph out the back door.
Physics.
Not magic.


And more proof (my car):

Slicks:
1.9 60' - 12.95 @ 107
1.8 60' - 12.74 @ 109

Earlier that year on radials:
2.3 60' - 13.65 @ 105
2.1 60' - 13.55 @ 106

Here is some proof that tire spin in my car equals higher MPH.


3yrs ago ran a nitrous pass on street tires:

12.8 at 119 with 2.3ISH 60'

Then an hour later after bolting on the slicks,

12.43 at 108 with a 1.6ish 60'

Both runs I crossed the line in the same gear just as my shift lite was coming on at 5800.

[QWKSNKE]

Originally Posted by slvrbullit

Here is some proof that tire spin in my car equals higher MPH.


3yrs ago ran a nitrous pass on street tires:

12.8 at 119 with 2.3ISH 60'

Then an hour later after bolting on the slicks,

12.43 at 108 with a 1.6ish 60'

Both runs I crossed the line in the same gear just as my shift lite was coming on at 5800.

Thank you Tommy, that is the same type of runs I have experienced but I didn't have the timeslips to give exact examples.

[Sendero]

So I guess loss of traction equals higher MPH trap, right?

[QWKSNKE]

Originally Posted by Sendero

So I guess loss of traction equals higher MPH trap, right?

In a lot of cases, yes