I respectfully disagree with both of you...
You never want to be shifting at the end of the track into any gear (4th in our case) we only stayed in it for 18 mph b4 we hit 142+ mph(142-124).
We did 37 miles in 3rd gear(126mph)...I made up only 27 mph b4 I was done( from the 1/8 mile).... someone u questioned why so low.
here u guys can study the plotted graph KPG was kind enough to make...
The blue line is Bobby running 10.11a@142+ mph and the black line is Todd K running 10.2 @ 144+ mph. U guys can do the math...Notice that at 110 mph Todd took of on Bobby.
Either way... we did 37 miles in 3rd(124 - 87mph) gear and only 18 miles(142 - 124mph) in 4th... so If I could finish on top of 4th this would be an easy 150+ mph.
GEARING GEARING GEARING......

 

I don't know what you are disagreeing with because I never said that anyone would want to shift a gear right before the traps.I was only commenting on why your car doesn't pick up more mph in the last half of the track .Rather I was complementing your car for having a higher 1/8 mile trap.For example a very fast Viper (7.98@183) has a 5.32 @143 1/8 mile so he picks up very little in the final 1/8 mile (trap speed)relative to his overall trap(40mph for the Viper to my 34mph and your 29mph)because he is traveling so fast at the 1/8.That was my point.Yes gearing would help,but do you want a dedicated drag car?

 

to add to this point... I remember reading somewhere that a top fuel dragster is doing in the 260 to 270 range in the 1/8 mile and finishing in the 330 range. This would add to Jeans point about covering the distance quicker therefor it is harder to gain big mph in the last 1/8.

 

AH,my point exactly!!

 

A lot of this comes down to what type of car you want. Many of the above-referenced modifications and tweaks are great for the track, but hardly desirable on the street. It will be a tremendous achievement when Mark runs a 9 (and he will). That being said, I personally am more interested in performance that translates to the street, where I actually drive my car.

Craig

 

Joe don't get me wrong.. Im not mad or anything... we just are talking

I talked to Todd K and Bobby( who in my opinion is probably the one of the most experienced 1/4 drivers I met.). all three of us spend some time recently... and I asked that specific question as well. why we only picked up so little in the second 1/8th... the answer was two fold. One is the gears for sure... the other is that this car needs to be in a certain RPM range to produce the power for those few seconds in the 1/4. Notice how Bobby shifted at 7K and lost MPH gained to that of Todd who shifted at 8K....
Withe help of the GPS unit and KPG, the 4 times I ever ran this car... we have I believe come far in trying to nail down the perfect run. We have been overcoming unexpected situations as we go.. mind u I am 1000 miles away from home and Todd is 4 hours... we dont have a track in the back yard.
I can assure you all that there will be some tuning adjustments in the near future... we know now what to do... Now thats if I still want to continue pursue 1/4 times... and that will be decided later after we see what this car can really do cause we have not opened up all the way...
mark

 

Chidoks
Was chatting with Justin a couple of days ago, he has been in H town for a week or so tuning three Supras and 2 TT Vipers!! He has asked me about doing some tuning on 996 turbos... if you like to meet him let me know. What is your name and what are you driving??
Robert

 

Hey, you have Rt 66 dragstrip nearby right? No more excuses, get out there and run some 9's!!

 

Kudos to you Markski, sounds and runs phenomenal!!!

 

unfortunately i'm going to be driving my rental car down as my supra is down for some upgrades.. i would definitely like to meet him and talk to him about tuning because a couple of us were thinking about flying him down to the east coast for some tuning.. i am pm'ing you my info right now...

 

Exactly what I was thinking!

Mark, if you want a dedicated 1/4 mile car, strip the interior and say hello to 9's.

It would be a shame to see this beast restricted to track duty. Good luck, whichever way you choose to go.

 

Craig, totally understand where you are coming from. But these levels of horsepower are only useful AT ALL on a drag strip. :-)

 

That's very slow. For four shifts before half track that's .8 seconds of poor drive. Drag strips aren't the same as racing a sports bike on a long flat highway :-)

The only answer here is a sequential dog engagement tranny. Jean?

 

If you shorten the gears 2-5 by just a little bit, why wont it be streetable?

 

You have a point there. I have contemplated a 1200 RWHP TT Viper, but have thus far resisted for precisely the reason you state. Its WAY more power than I can use on the street (with very few exceptions), and I would not use the power where it is intended to be used -- at a 1/4 mile track.

Craig