Speed by gear - GTS (creampuff)

[Next Phase]

Was doing some research and just wanted to confirm some numbers. Was reading a post and someone stated that they were going through the 1/4 at the top of 3rd at 118 mph. These are the number that I found, so I don't see how 118 mph is possible? I know cutting out a shift would yield a better E.T., even if the 3rd to 4th shift is one of the quickest. All my drag experience has been in Corvettes and the 3.42 gears forced a 4th gear shift.

1st gear - 53 mph
2nd gear - 80 mph
3rd gear - 110 mph
4th gear - 142 mph
5th gear - 185 mph
6th gear - 185 mph

I have 19/20's w/ stock 3.07 gears, so my mph isn't accurate (or I would just take a look myself).

Can someone confirm the speed by gear?

Thanks!

 

[SquadX]

I cant confirm those but with 3.73 gears im 5th at 5600 rpms at 147mph. *****.
I'd think 5th would be a little higher with 307, closer to 190.

Also, at what rpm at you getting these figures at? I think most rev out to 6k plus on tap rev limiter thru the 1/4.

 

[uvbnbit]

What tire (diameter/height) you running on the rear?

RICHMOND Street Performance Calculator

 

[Next Phase]

I cant confirm those but with 3.73 gears im 5th at 5600 rpms at 147mph. *****.
I'd think 5th would be a little higher with 307, closer to 190.

Also, at what rpm at you getting these figures at? I think most rev out to 6k plus on tap rev limiter thru the 1/4.

It was from a website, and stated 6k rpm for the first 4 gears...

What tire (diameter/height) you running on the rear?

RICHMOND Street Performance Calculator

I'll have to double check, but I believe they are 335/ 40? Mich Pilots.

 

[uvbnbit]

If PS2's, they're probably 335/30's and 28" tall.
I think 4th gear is 1.0, 5th is .75, 6th is .5
I can't recall 1-3.

 

[sdaddy]

My best 1/4 mile time was 11.997 at 120.66 in my 96 GTS with stock 3.07 gears and 17" Hoosier drag radials. Never got out of 3rd gear. The Hoosier drag radial is not a very tall tire. I went to the MT ET street drag radial which is over an inch taller and computed I should be able to get to 126 or so in third if I can get the car to go that fast. If I remember correctly, the Hoosiers were about 27.5 inches tall and the MT ET Streets are about 28.5 inches tall. I have not been back to the strip with the MT ET Streets.

 

[Zentenk]

I believe it is:
2.66
1.78
1.30
1.0
.74
.50

I have 17inch wheels and went through traps in 4th gear... probably could have done 3rd but I don't want to hit rev-limiter just incase.

 

[Burntrubber]

i posted a whole thread on this i thought

 

[Burntrubber]

http://forums.viperclub.org/rt-10-gts-discussions/607971-speed-gears-gear-changes.html

 

[pdmracing]

I just went to the strip with Jon Bs new Khumos Ecsta XS street tires, I normally use 4th gear out of need hitting rev limiter in 3rd with pilots at Atlanta(alt 1190 Ft)

. But with the Khumos lack of slip at launch I was in 3rd & hitiing the limiter just out of the speed traps & was doing 118.7 repeatedly, In 4th the fastest I have been was 126,(lots of wheelspin, slow time but high mph) but most of the times it was in the 116 to 118 range. This is a bone stock 97 w 40k miles BTW, I JUST changed the plugs for the first time & I thought it lost its MOJO, It has always done the same ET's since the first week. & has slowly gotton faster over the years. This was the first time I only used 3rd in all those years. I have always used 4th in the past for my best times (12.09)
Note that atlanta is a high altitude & the weather in that area the density altitude is usually closer to 3000 feet most of the time. Sea level would be .3+- quicker

I should have weighed the Khumos before installing, they felt a lot heavier than the pilots& I attribute the trap speeds to the full tread, although I have not measured the stagger.
Since I pulled the throttle cable through the firewall on that last run (it wont go any faster!) I will have it up on stands today & measure the stagger & compare on the pilots.

On my drag car that runs real slicks, air pressure alone can account for 2 inches of stagger with less than 5 lbs. Stagger BTW is the rollout of the tire, you can wrap a tape measure around the tire, or mark with chalk & measure the lenghth of the roll out.

 

[plumcrazy]

126mph from a basically stock gen 2 ??

 

[pdmracing]

126mph from a basically stock gen 2 ??

Was my first run with the car at Atlanta way back when, I have the time slip somewhere , it was over 13. et, I remember asking the time shack girl, the time better be in the 12's, (none of my vettes ever did what the magazines said), & she said sorry , but your gonna love the MPH. I had huge wheelspin in first & second. So I credit that speed with being in top gears longer due to hitting rev limits in the front end of the run (sort of like running a throttle stop on a carb car) Eventually it got down to 12.4 that day with less than 1000 miles on odometer (the next week it was at road atlanta doing a Lotus V8 vs other super cars test private test, but thats another story).

Obviosly an anomoly, like that 1.798 60 ft time this week but and running the same ETs in 3rd as I did in 4th, Prior to tuesday my best 60 ft ever was 1.890, but most are in the 1.9's with my best ET. Then again , with the pilots I have never launched over 2k, mostly 1500 to 1750. On the Khumos it was actually bogging at 2k, that 1.7 60 was a 3k launch & still no spin in 2nd. That was at 27 lbs PSI. I usualy ran the pilots at 19 to 22 lbs.

I just went through a batch of time slips through 1999, I'll keep looking for those & would love to compare 1/8 & 1000 ft times on that run. I know I have them & the VOI in vegas from 99 somewhere. Now I must find them!

My major focus in those days was Road racing & Draging was an off weekend fun, But since I got sick in 2007, Drag racing has been my new therapy & its amazing how much science is involved, I have been running full time for about 2 years now & applying my successful road racing techiques to braket racing has been an interesting challenge.But made the NHRA Division 2 finals in year 1, Mainly on luck.
My road racing pals laughed & thought there is nothing to it but going straight. I had one of them run my all season tired SRT8 300 one day, His best was a a 14.1 with a fab .008 reaction time, I got in & did a 13.3. he couldnt believe it.

 

[Camfab]

I think the anomoly was track equipment failure. A stock Gen II doesn't pick up 8-10mph with a gear shift, tire spin, or anything else.................well unless you hit the squeeze.

 

[pdmracing]

I think the anomoly was track equipment failure. A stock Gen II doesn't pick up 8-10mph with a gear shift, tire spin, or anything else.................well unless you hit the squeeze.

Equipment failure is always possible, Atlanta is an NHRA national track, so the equipment is the equipment.
But regarding the wheelspin anology, I was at an 1/8 mile strip last november & couldent hook up at all & looking at that time slip 1/8 mile time of 8.38 with a 91 mph , spining all the way through 1st & most of 2nd. That mph equates to a more like a 7.69 et. So again, in that case shifting into 3rd when I did in the 1/8 brought out that speed. The Speed on that Et should be no more than 84 or 85 mph

For comparison, tuesday I ran a 7.850 @ 89 , With a 60ft 1.798 330 ft 5.12
that run 8.386 @ 91 2.040 5.43


So on this example there is 2 mph in the 1/8 where a stock viper on street tires is certainly lacking, You make all your ET on the last 330.

An 7.50 1/8 = 12.0 as a NHRA standard