Just curious what gear and rpm some of you are crossing the quarter mile finish line at.
Please include your vehicle build engine/trans, et, speed, tire size, if possible.

Is there an ideal gear/rpm range to be in?

How is this affected as your power goes up and your times get faster?

Example? pre turbo finish line @ 7,500 in 4th... post turbo 5,000 in 5th-or opposite ???

I would think Ideal would be topped out in 4th but I'm not sure

 

Ideal gear/rpm at the end of the 1/4 mile would be the end of 4th gear.

 

On a 24.5 tire and stock gsr trans shiftin at 10.2 going though the traps in 4th gear at about 97 to 9800rpm

 

Now thats rappin it out. nice

 

I can't remember since it has been a year since I took my car to the track.
But I'm pretty sure I shifted into 5th just before the finish. I have a crx w/ b16a sirII. I have the y21 hydraulic factory lsd tranny, it was on bfg drag radials. I ran a 13.5 et.

I have changed my setup and should be much quicker. also now I have 8x23x13 slicks. so basically Im trying to find out what gear Ill be in crossing the finish. I redline at 8,200

 

24.5 tire 9700rpm on k20

 

I think if I would've gotten taller tires I would've been in 4th. But with the 23's Im guessing I'll still have to shift to 5th before finish. Not sure

My slicks are about an inch taller than the bfg's I was running. Do you think 1 inch more tire would be enough to keep me in 4th?

 

9200 25" at 130 mph in 4th

 

b18c5 205whp cable j1 4.40 tranny on 22's shifting @ 9400 i pass the line in 4th @ or around 8600 8700.

you dont need a 23 how much hp do you make and what final? if anything use a 22 and raise the rev limit and spin the motor

 

Should be around 400-450 hp. Im not gonna spin it much over 8,200.
I dont need a 23 to keep it in 4th? or for my setup? The gears are short and the nitrous adds a ton of torque so Ill need at least 23's I believe. stock final drive

 

Is this a 400-450hp nitrous car? What transmission? Im thinking you will need a 24.5 for sure!

 

through the traps at around 9100 in 4th with our old 24.5in slick and stock GSR trans at around 140-143mph. cant remember what it was on the 25's, i think around 8700 @140 in 4th on the only pass we stayed in it till the end last season.

400-450hp use a 24.5 and a gsr trans, but even on a gsr 8200 will only take you to a little under 130 probably...dont use 5th, raise the limiter if you need to go faster.

 

b16 1-2-3 gsr 4th, shifting 10.5k, trapping 96-9700. goin back to b16 4th.

 

At the shootout last year, my car was on the rev limiter in 4th at 10,000 when I went across the line at 164mph. That was with 26" tires and a PPG box.

 

What FD in the PPG, Danny? The 4.6 or 4.4?

 

Can anyone answer whether the power level of the car affects what gear/rpm you cross the finish at. and in what way???

example 250 hp car hits finish in 4th at 6,500

same car @ 450 hp hits finish in 4th at 9,000

 

After viewing some of the post on this thread I think I am going to run out of gear or I will need to replace my springs and retainers. I have the older set of Ferrea springs and retainers (sportlines) and it states that they are only good 9.5K and not recommend past that. I have a CTR tranny with a GS-R 4th. Planning on running 24.5 slicks. 750HP.

 

4.6

 

Obviously, a car with more power travels quicker, therefore accelerating through the rpms faster. If both cars have the same gear ratios and tire size, they will both do the same mph at the same rpm(considering no tire spin). With more power, it will get there quicker. I hope this answers your question.

 

PPG gearset, 4.4 final, 24.5" tire, shifting at 10,500 rpm, through the traps in 4th gear at 10,000 rpm.

 

it sure did answer mine!

 

you say stock final but what kinda tranny? 4.40 or 4.70? around 400-450? you hanent dynoed the motor yet? dont worry about tire then get it done see how much you make then deal with the tire size but a 24.5 will be good for that much power and when you dyno the motor see what it pulls to if it pulls to 10 rev to 10 dont short shift her revNbang her!!!!!

 

7200 4th 130mph 26s.

 

Engine is b16a sirII, y21 hydraulic tranny with factory lsd. The final drive is a 4.4. Motor is going together now, so no I haven't dynod it. Its taking a 200-250 shot of nitrous.

I will dyno it. and If it pulls up until 10 Ill rev to 10. But with the cams in it I highly doubt it will.

I think I will send back my 23's for 24.5's.

 

Last time I was at the track I had on bfg drag radials which measure 22 inches total height. If I go up to a 24.5 I wonder if that would be enough to keep me in fourth gear. I recall shifting into fifth just before the finish.

Is there any rule of thumb estimate. like for every inch more tire you drop 200rpm???

Ill prolly just have to wait and see what happens I guess