Top of 4th 110mph?

[FATHERFORD]

So the top of 4th, around 5800rpm or so shows 110mph on my 97 GTS..

Are the speedos/tachs known to be a little off? Or do I have some crazy gears in my car?

What is the top of 4th with the factory 3.07's? 3.55's?

If my my gauges aren't wack, and top of 4th really is 110mph... Guess I have 4.10's?

 

[Red Snake]

I don't know but that can't be right. We just had a dyno day where the dyno was set to record power up to 140 mph (4th gear pulls). I was hitting 140 at about 5,000 rpms. I'm not sure if mine was right either or the dyno set up was whacked?

 

[dave6666]

With OE tire dimensions and OE gears my '01 is as such

1st - 59mph at redline
2nd - 88
3rd - 120
4th - 156

5800 in 4th should be about 146 in my car. If I had 3.55:1 gears it would be 126 mph.

Riddle solved?

 

[FATHERFORD]

So I guess I have 4.11 gears or a whacked speedo in higher mph..

I GPS'd my car and it's runs roughly 5mph slow going 60-70mph.

What does your car run in 6th going 70mph?

Guess this explains why my car is so quick.

 

[dave6666]

So I guess I have 4.11 gears or a whacked speedo in higher mph..

I GPS'd my car and it's runs roughly 5mph slow going 60-70mph.

What does your car run in 6th going 70mph?

Guess this explains why my car is so quick.

I was thinking the 3.55's were kind of matching your numbers. 4.11's would probably lower your 4th gear speed to about 100, not 120.

6th gear? Never use it.

Your car is quick because it is red.

 

[Red Snake]

................

Your car is quick because it is red.

Word.

 

[FATHERFORD]

Well I guess i'll find out when I pull them next month. If what all these other viper owners are saying is true, the factory 3.07's will work well with 700rwhp.

 

[dave6666]

I should pay better attention.

You said 110 mph, not 120.

You said 4.10 not 4.11.

Soooooooooooo, my corrected analysis is 5800 rpm with 4.10 is 109 mph.

 

[Boxer12]

I think you mean...'no wonder I have to shift so often...' ya, its fast bc its red!

 

[FATHERFORD]

I think you mean...'no wonder I have to shift so often...' ya, its fast bc its red!

I commonly go 1st, 3rd, 5th/6th..

 

[Boxer12]

I commonly go 1st, 3rd, 5th/6th..

that's a drag...I would change em out. Sounds like you are going to. Nice car, btw.

 

[DreamOn]

What does your car run in 6th going 70mph?

When I'm just cruising or stuck behind slow stupid people in the left lane, my cars running about 1500-1600 RPM in 6th at 70mph.
((I have a stock rear end in my '01 RT/10))

 

[Viper ACR Lover 02]

When I'm just cruising or stuck behind slow stupid people in the left lane, my cars running about 1500-1600 RPM in 6th at 70mph.
((I have a stock rear end in my '01 RT/10))

Stock rear in my '02 ACR as well... sounds about right...

 

[ruckdr]

Here, calculate yourself:
SS #670 with MM6 manual and GU6 3.42 gears

Mine in 4th 3.07's at ~6000 is 145+ on the track.

 

[RichieSRT10]

4th Gear shows an indicated 162mph. At 125 mph my speedo shows a 3.5 mph difference compared too my GPS. Of course all speeds were done on a closed course.

 

[Disturbed]

fatherford,


If you want to swap my 3.07 for your 4.11 let me know...Just shoot me a PM

The 4.11's might work for drag racing a little better.



The top of 4th gear comes in about 150mph on my speedo.

 

[FATHERFORD]

fatherford,


If you want to swap my 3.07 for your 4.11 let me know...Just shoot me a PM

The 4.11's might work for drag racing a little better.



The top of 4th gear comes in about 150mph on my speedo.

Might could do that. When I get my viper back I'll verify what I have and PM you..

 

[Disturbed]

Might could do that. When I get my viper back I'll verify what I have and PM you..

What speed is the top of 6th do you know....is it about 230mph?


If so, I'm making about 565rwhp 610rwtq and that would be PERFECT for the power this car has.

 

[Limit]

How do you guys figure this out? I've got a '96 and am wondering what the highest i should be going in each gear(just as a quick reference)... The owner's manual gives the lowest speeds for each gear to save on gas....who needs that?

 

[dave6666]

Here, calculate yourself:
SS #670 with MM6 manual and GU6 3.42 gears

Mine in 4th 3.07's at ~6000 is 145+ on the track.

How do you guys figure this out?

This makes it easy. Or if you like math, you need tire diameter, gear ratios, rpms, pen and paper...

 

[Burntrubber]

for a stock GTS or RT10...should help. I think you would know if they are 4.10s not sure how you would get traction 1st-3rd?
also i thought we should shift a GTS at 5500rpms


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

 

[FSTENUF]

Running 3:55 in mine. just put them in last spring.with 19" wheels I run 125 mph in 3rd.When I hit 4th it is still pulling hard I just back out of it. Thats enough to make my point on the open road.Sounds like you have lower gears then me.

 

[xlrashn]

I am with Dave on this one....Faster because it's RED!!

 

[Disturbed]

How do you guys figure this out? I've got a '96 and am wondering what the highest i should be going in each gear(just as a quick reference)... The owner's manual gives the lowest speeds for each gear to save on gas....who needs that?

Forza Motor Sports 2


Now if I could rev to 7k....that would be sweet.


According to FM2


4.11 with the rest of the gears stock 4th would be 110mph at 6krpm.

 

[dave6666]

Running 3:55 in mine. just put them in last spring.with 19" wheels I run 125 mph in 3rd.When I hit 4th it is still pulling hard I just back out of it. Thats enough to make my point on the open road.Sounds like you have lower gears then me.

How are you getting 125 in 3rd with 3.55's when my 3.07's redline at 120 mph in 3rd?

19" wheels don't explain that difference do they?

 

[ruckdr]

How are you getting 125 in 3rd with 3.55's when my 3.07's redline at 120 mph in 3rd?

19" wheels don't explain that difference do they?

Dave,
According to the calculator:
SS #670 with MM6 manual and GU6 3.42 gears

with 3.55's, and a whopping 31.5 tire diameter, will yield 122 mph in 3rd.

Oh well.

Later,

 

[dave6666]

with 3.55's, and a whopping 31.5 tire diameter, will yield 122 mph in 3rd.

Oh well.

Later,

Mudgrips maybe?

 

[redtanrt10]

Mudgrips maybe?

Dave,
According to the calculator:
SS #670 with MM6 manual and GU6 3.42 gears

with 3.55's, and a whopping 31.5 tire diameter, will yield 122 mph in 3rd.

Oh well.

Later,

Or a built motor with a 7200 redline

 

[Burntrubber]

Or a built motor with a 7200 redline

If you have a higher redline does the hp/tq curves still cross at 5250 rpm's? If so it would be awesome to run 4:10s with a 7k redline

 

[Disturbed]

If you have a higher redline does the hp/tq curves still cross at 5250 rpm's? If so it would be awesome to run 4:10s with a 7k redline

It will ALWAYS cross at 5250rpms....it's in the formula.



4:10 gears w/ 7000rpm redline, would be SWEET! As long as you stay N/A(or less than 700rwhp). With that high of a redline the cam needed to make power on the big end would cause you to loose some tq on the bottom. But...you wouldn't miss that extra tq on the bottom end with that 4.11 gear. You could still idle in the 600-700rpm range too.