How much gear is too much? - Ford Mustang Forums : Corral.net Mustang Forum
 
LinkBack Thread Tools Display Modes
post #1 of 18 Old 08-09-2009, 10:48 AM Thread Starter
Registered User
 
bikewiz's Avatar
 
Trader Feedback: (18)
Join Date: Mar 2005
Location: Mt. Prospect, IL
Posts: 2,129
How much gear is too much?

Hey guys,

I've got the TR-6060 in my car from an '08 Viper. The gear ratios are:

1st Gear Ratio 2.66:1
2nd Gear Ratio 1.78:1
3rd Gear Ratio 1.3:1
4th Gear Ratio 1:1
5th Gear Ratio 0.74:1
6th Gear Ratio 0.5:1

With the 3.50 gear I'm running now, the car is a dog in first and I barely can use 6th on the highway. Since I want to change this and start seeing some drag strip duty as well, its time to step up the gear. I've got a 9" rear, so the ratios I am considering are 3.75 and 3.89. On the street I run a 315/35-17 which is 25.68" tall. On the track I will be running a M/T ET Street 26x10.5-15, which is 26.1" tall.

I know if you run too much gear, you will never build up boost. So I'm trying to find the happy medium that will let my car launch hard at the track and be able to cruise in 6th gear, but I still want to be able to build boost in 2nd, 3rd, 4th.

Which one would you do, 3.75 or 3.89 and why?


Matt
'95 GTS - (no engine) | TR-6060 | 9" w/Tru-Trac | Griggs T/A | MM Panhard | Koni DAs
bikewiz is offline  
Sponsored Links
Advertisement
 
post #2 of 18 Old 08-09-2009, 01:56 PM
Registered User
 
Trader Feedback: (0)
Join Date: Feb 2006
Location: Portland, OR
Posts: 114
I don't understand why your car is a dog in first with over 600 rwhp. I would think you would have trouble hooking up in 1st with your present setup (depending upon how it's tuned). How much does your car weigh with you in it? If you want to do a gear change, I doubt if you would feel much difference going to the 3.75, so the 3.89 would be a more logical choice. I wouldn't do it, but that's just me. Cheers.


1965 Cobra replica with twin turbo Dart block 331
thomaswpt is offline  
post #3 of 18 Old 08-09-2009, 07:47 PM
Registered User
 
hotordder_101's Avatar
 
Trader Feedback: (11)
Join Date: Feb 2003
Location: MS
Posts: 413
What RPM are you leaving at? How much boost on the line?
Luke

'94 F350 Crewcab dually 7.3 Turbo (Not Powerstroke) Deisel CLEAN
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


'89 Ranger 2.3 5spd Work Truck
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
hotordder_101 is offline  
Sponsored Links
Advertisement
 
post #4 of 18 Old 08-09-2009, 09:37 PM
Registered User
 
biminiLX's Avatar
 
Trader Feedback: (19)
Join Date: Mar 2000
Location: Beaver, PA/Toledo, OH
Posts: 1,405
What power and weight? Then you can calculate wanted trap rpm in 4th and pick gear accordingly.
I have a 28" 3.50 combo I choose to trap in the 150 range around 6000rpm
TKO600 .64 5th also not needed much while cruising
-J

'91 LX hatch
Bimini Blue
427"/88mm at 16 psi
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by biminiLX; 08-09-2009 at 09:40 PM.
biminiLX is offline  
post #5 of 18 Old 08-09-2009, 11:44 PM Thread Starter
Registered User
 
bikewiz's Avatar
 
Trader Feedback: (18)
Join Date: Mar 2005
Location: Mt. Prospect, IL
Posts: 2,129
thomaswpt,

To better clarify, I meant that its hard to get the car moving from a stop in first gear with the 2.66 ratio compared to the 2.87 ratio I had while driving on the street. The new trans has never seen the track. The 6th gear is also pretty useless below 75mph.

hotordder_101,

When I launched on the old setup, It had to be 3500rpm or above. Below that would bog the car down. I've never paid attention to the boost at the line. Too many things to concentrate on when I'm at the line. My car likes to break a lot, I've only got 7 passes on the car since I built the new motor with the turbo. Its going to take a lot more practice for me to pay attention to things like boost on the launch. An MSD 6AL2 will be in my future, so that 2 step will help me out when the time comes.

biminiLX,

Power is in the sig. I've done stuff since I dyno'd those #s so they should be a little higher, but not much. I've never weighed the car, but its basically a stock weight '95GT with some addons. I've removed some stuff, but added stuff in the process. For instance I've tossed all the smog stuff, alum heads instead of iron, moved battery to trunk, and lighter seats. However, add on subframes, roll bar, turbo setup, heavier trans, torque arm, panhard bar, larger radiator, etc. I think I've added more weight than I've removed. Plus I weigh about 225, so I figure with me in it the car is weighing in the 3500-3600 range. My shift light is set at 6500rpm so thats where I would prefer to trap, but my rev limiter is a 6900rpm pill.


I'd love to run the 3.89 to make the car a little more responsive and make 6th gear more useable on the highway, but I'm worried about sacrificing boost and running out of steam before I reach the end of the 1/4.

Matt
'95 GTS - (no engine) | TR-6060 | 9" w/Tru-Trac | Griggs T/A | MM Panhard | Koni DAs
bikewiz is offline  
post #6 of 18 Old 08-10-2009, 12:39 PM
Registered User
 
331merc's Avatar
 
Trader Feedback: (8)
Join Date: Sep 2002
Location: Glen Ellyn Il.
Posts: 1,185
Matt, I think switching to the 3.89 gear will be a big mistake. The first gear issue you can not say has been fully looked into. You admit you have limited time at the track with it. Launching under boost or higher rpm will help the bogging issue. Turbos make torque so bogging will not be a issue when you figure out how to launch the car.

The 3.89 and the 26x10 ET street (which is really small tire by the way) will top out at the traps with a real low mph. A 28" tire will help that if you decide to run that 3.89 gear. On the street with the 25.x" height Hoosiers and 3.89 gear will not load the turbo as well either. Keep the 3.50 for now till you test some more. And keep that 6th gear for those long 80mph crises.

Mike 1986 Capri street car w/ a/c, p/s & p/w
Custom built T6 80mm s400sx based kit Shaunthony's built (Twin Trouble and Anthony Fury)
9.31 @ 146 1.39 60' on drag radials @ 3735# Kurgan tuned AEM EMS
80mm 718rwhp new 88mm 921rwhp No new track times yet
331merc is offline  
post #7 of 18 Old 08-10-2009, 07:18 PM
Registered User
 
Trader Feedback: (0)
Join Date: May 2006
Location: Dallas, Texas
Posts: 250
i always liked a lower gear...

i also think you should stay where you are for now... learn the car... i think you should be fine... play with tires first before you go into the rear... look at your suspension and see if there is anything to help... also maybe get a 2 step and leave alittle hight dont be scared lol...

Looking for something fast...
DallasGT01 is offline  
post #8 of 18 Old 08-11-2009, 08:59 PM
Registered User
 
jaredgoodwin's Avatar
 
Trader Feedback: (14)
Join Date: Nov 2004
Location: Bellingham, WA
Posts: 959
I agree, you don't need more gear. I run 3.31s with my TKO.

2007 Mustang GT
Whipple'd
1987 Mustang GT T-Tops
408W Twin turbo
jaredgoodwin is offline  
post #9 of 18 Old 08-11-2009, 09:26 PM
Authorized corral.net Advertiser
 
Trader Feedback: (10)
Join Date: Oct 2003
Location: Braselton, GA
Posts: 3,684
leave your gear alone

PLEASE EMAIL --->
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
<--- DO NOT PM for prices or tuning!

815-669-RACE (7223) <--- Sales

Please visit our e-store --->
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
<---

Chicagolands largest Vortech dealer since 2006!

We stock many parts! If you dont see it, just ask!

Before you buy ANY mustang part, give us a chance. We accept mastercard and visa.
Authorized SCT, AEM, Diablosport, Vortech, Paxton, BS3, FAST, UPR, PA Racing, Harland Sharp, Team Z, GMS, Trickflow, Kooks, and MANY MORE!


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
flyin_hawaiin is offline  
post #10 of 18 Old 08-11-2009, 09:33 PM
Moderator
 
eleanorfox's Avatar
 
Trader Feedback: (57)
Join Date: Mar 2006
Location: Monroe Michigan
Posts: 10,681
when you are in the top of 4th redlined off the rev limiter before the traps like i did. lol


2001 Mustang GT Bullitt (terminated) #2793
2015 GMC Sierra 1500 4x4
2015 Chrysler 300 S
eleanorfox is offline  
post #11 of 18 Old 08-12-2009, 12:37 AM Thread Starter
Registered User
 
bikewiz's Avatar
 
Trader Feedback: (18)
Join Date: Mar 2005
Location: Mt. Prospect, IL
Posts: 2,129
Okay cool, I'll leave the gear alone.

Even though I built my trans to be capable of 1000hp, I still am afraid of blowing it up. I guess I will just have to run it and see what happens. I'm switching to 15" wheels with real bias ply drag tires which should give a little cushion to the drivetrain on the launch.

This sounds silly, but all I want to do is get some air under the front tires, and pull off a 10.xx pass. This is not a dedicated drag car, its an everything car.

Thanks for your opinions and suggestions!

Matt
'95 GTS - (no engine) | TR-6060 | 9" w/Tru-Trac | Griggs T/A | MM Panhard | Koni DAs
bikewiz is offline  
post #12 of 18 Old 08-12-2009, 09:27 PM
Registered User
 
biminiLX's Avatar
 
Trader Feedback: (19)
Join Date: Mar 2000
Location: Beaver, PA/Toledo, OH
Posts: 1,405
Do you leave with boost?
I have a 2.87 first gear with a 3.50 and 28" tire and got a 1.51 60' leaving off a 2-step about 3800rpm and 3psi.
If you don't have a way to build boost, you'll need a 4000+ launch and if you can hook it might benefit from just a little more gear IMO.
I'd leave the gear though and work on the launch either way.
Good luck.
-J

'91 LX hatch
Bimini Blue
427"/88mm at 16 psi
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
biminiLX is offline  
post #13 of 18 Old 08-12-2009, 10:21 PM Thread Starter
Registered User
 
bikewiz's Avatar
 
Trader Feedback: (18)
Join Date: Mar 2005
Location: Mt. Prospect, IL
Posts: 2,129
What was your ET and trap speed with that setup? Whats your HP/TQ?

Lifting the front tires on your launch?

Sounds like the money I was gonna spend on a gear might be better spent on a 6AL-2 just to get the 2 step.

Matt
'95 GTS - (no engine) | TR-6060 | 9" w/Tru-Trac | Griggs T/A | MM Panhard | Koni DAs
bikewiz is offline  
post #14 of 18 Old 08-12-2009, 10:52 PM Thread Starter
Registered User
 
bikewiz's Avatar
 
Trader Feedback: (18)
Join Date: Mar 2005
Location: Mt. Prospect, IL
Posts: 2,129
Quote:
Originally Posted by 331merc View Post
The 3.89 and the 26x10 ET street (which is really small tire by the way) will top out at the traps with a real low mph. A 28" tire will help that if you decide to run that 3.89 gear. On the street with the 25.x" height Hoosiers and 3.89 gear will not load the turbo as well either. Keep the 3.50 for now till you test some more. And keep that 6th gear for those long 80mph crises.

Hey Mike,

I was going with the 26" tire to put less load on the driveline when I launch. I've seen how tall the 28" tires are and I'm skeptical on how they would fit on my car because my car is slightly lowered and my axle is 3/4" longer than stock on either end to eliminate a 3/4" spacer I used to run to clear the 335s I was running. I'm going to buy a set of M/T tires in the next week or two to take advantage of the $50 rebate they are running. I'm thinking now that I will go with their 27 x 10.5-15 ET Streets. It's a compromise between the 26 and the 28. Think that will work out good or should I try real hard to fit the 28"? I'm just worried about the fitment, because once they are mounted, they are mine.

Matt
'95 GTS - (no engine) | TR-6060 | 9" w/Tru-Trac | Griggs T/A | MM Panhard | Koni DAs
bikewiz is offline  
post #15 of 18 Old 08-12-2009, 11:06 PM
Registered User
 
biminiLX's Avatar
 
Trader Feedback: (19)
Join Date: Mar 2000
Location: Beaver, PA/Toledo, OH
Posts: 1,405
Quote:
Originally Posted by bikewiz View Post
What was your ET and trap speed with that setup? Whats your HP/TQ?

Lifting the front tires on your launch?

Sounds like the money I was gonna spend on a gear might be better spent on a 6AL-2 just to get the 2 step.
See new forum post
I just have a 6AL, bought an MSD 2-step and dial and had it wired to my clutch switch. Builds about 2-4 psi depending how long I sit on it, no tuning to take advantage of it.
I'd highly recommend it if you plan on racing regularly, makes the launch much more consistent so you can play with the suspension, rpm, etc
-J

'91 LX hatch
Bimini Blue
427"/88mm at 16 psi
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
biminiLX is offline  
post #16 of 18 Old 08-12-2009, 11:24 PM
Registered User
 
331merc's Avatar
 
Trader Feedback: (8)
Join Date: Sep 2002
Location: Glen Ellyn Il.
Posts: 1,185
Quote:
Originally Posted by bikewiz View Post
Hey Mike,

I was going with the 26" tire to put less load on the driveline when I launch. I've seen how tall the 28" tires are and I'm skeptical on how they would fit on my car because my car is slightly lowered and my axle is 3/4" longer than stock on either end to eliminate a 3/4" spacer I used to run to clear the 335s I was running. I'm going to buy a set of M/T tires in the next week or two to take advantage of the $50 rebate they are running. I'm thinking now that I will go with their 27 x 10.5-15 ET Streets. It's a compromise between the 26 and the 28. Think that will work out good or should I try real hard to fit the 28"? I'm just worried about the fitment, because once they are mounted, they are mine.
The 27" will be fine. Good in between size. Get the 2 step and learn to launch with boost and more rpm if you need it. It will leave hard and not bog at some point. So leaving will not be a issue. The 6th gear issue is another issue. But like I said save it for cruising at 80+mph. lol

Mike 1986 Capri street car w/ a/c, p/s & p/w
Custom built T6 80mm s400sx based kit Shaunthony's built (Twin Trouble and Anthony Fury)
9.31 @ 146 1.39 60' on drag radials @ 3735# Kurgan tuned AEM EMS
80mm 718rwhp new 88mm 921rwhp No new track times yet
331merc is offline  
post #17 of 18 Old 08-13-2009, 08:17 AM
Authorized corral.net Advertiser
 
Trader Feedback: (10)
Join Date: Oct 2003
Location: Braselton, GA
Posts: 3,684
Quote:
Originally Posted by bikewiz View Post
What was your ET and trap speed with that setup? Whats your HP/TQ?

Lifting the front tires on your launch?

Sounds like the money I was gonna spend on a gear might be better spent on a 6AL-2 just to get the 2 step.
matt..

let me know if i can help. I am an MSD dealer now!

PLEASE EMAIL --->
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
<--- DO NOT PM for prices or tuning!

815-669-RACE (7223) <--- Sales

Please visit our e-store --->
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
<---

Chicagolands largest Vortech dealer since 2006!

We stock many parts! If you dont see it, just ask!

Before you buy ANY mustang part, give us a chance. We accept mastercard and visa.
Authorized SCT, AEM, Diablosport, Vortech, Paxton, BS3, FAST, UPR, PA Racing, Harland Sharp, Team Z, GMS, Trickflow, Kooks, and MANY MORE!


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
flyin_hawaiin is offline  
post #18 of 18 Old 08-13-2009, 08:58 AM Thread Starter
Registered User
 
bikewiz's Avatar
 
Trader Feedback: (18)
Join Date: Mar 2005
Location: Mt. Prospect, IL
Posts: 2,129
After looking over finances, I'm thinking I really should stop putting money into the car and channel those funds over towards money for a house, but what the hell... you have an e-mail Bob.

Matt
'95 GTS - (no engine) | TR-6060 | 9" w/Tru-Trac | Griggs T/A | MM Panhard | Koni DAs
bikewiz is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
3.73's, Deluxe Install kit, tranny gear, speedo gear. stang2b95 Drivetrain Parts 5 07-02-2005 09:38 PM
Cluster gear , 2nd gear and 3rd gear for T5 thesource Drivetrain Parts 14 12-28-2004 04:33 PM
Someone knowledgeable about 4.10's, speedo gear & tranny drive gear - inside please! Cobra Jet NJ General Mustang Tech 9 09-12-2003 12:43 PM
Where to buy speedo gear & tranny drive gear? (best prices/service?) Cobra Jet NJ General Mustang Tech 3 09-09-2003 11:39 AM
Change the speedo gear and the gear in the transmission after gear swap? MPA 5.0/5.8 Engine Tech 2 05-12-2002 04:47 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome