2003-04 Mach 1 Registry Owners Club  

Go Back   2003-04 Mach 1 Registry Owners Club > "GO" Discussions > Engine & Drivetrain (Including trans & rear axles)

Thread Tools Display Modes
Old 01-27-2012, 04:35 AM   #101
Registered User
Mach916's Avatar
Join Date: Feb 2008
Location: Sacramento, Ca
Posts: 1,044
Re: Gears - to answer the questions once and for all

Originally Posted by 311-420 View Post
I've tested and proven this, but this crowd will never believe it until they match up with another mach with stock gears and get pulled.
yes exactly!!! ive posted videos and people still cant believe it.. they just cant get over the "feeling" and "visual" (rpm tach) of 410s and up...
2003 Mach 1 5spd Black with IUP
Engine Mods: cone filter, Crower stage 2 cams, Hooker long tubes, SLP Powerflo exhaust
Rear end: Cobra diff, moser axles, 3.73 gears, Ford Racing aluminum driveshaft
Suspension: Eibach Pro kit with poly isolators
And some other small things...

348.6/331.6 sae
Mach916 is offline   Reply With Quote
Old 01-27-2012, 08:14 AM   #102
Registered User
rsnider's Avatar
Join Date: Apr 2003
Location: Phoenix, AZ
Posts: 2,336
Re: Gears - to answer the questions once and for all

Unless there is a difference in the parasitic loss I don't see how the car would know the difference between 355's and 410's from a roll? Running two different ratio's against each other would give one or the other an advantage depending on the speed/rpm of the start.

The exception would be a car with a blower/turbo.
rsnider is offline   Reply With Quote
Old 04-18-2012, 02:41 PM   #103
What's Shakin'
Fauxnali's Avatar
Join Date: May 2011
Location: St Albert Alberta
Posts: 698
Re: Gears - to answer the questions once and for all

The majority of any gear set difference will be off the line and in the first two gears, once the ratio of 3rd with 3.73 as opposed to say 4th with 4.30, (may not be an exact calculation) add up they will be the same. It's the combination of the two ratios at any given speed that will be the comparison.

Also, if you are running the 1/8 mile and you are shifting with a 100 feet of track left, you should either gear up so you shift earlier, my choice, or go with a slightly taller tire so you dont have to shift at all.
1971 Mustang Coupe

1985 Mustang GT T-tops

2003 Azure Blue
IUP Automatic
One of 453
#2290 of 9652
Built on February 24th 2003
Eibach Pro-Kit, no ISO's in rear
Magnapacks CatBacks
Mac O/R X-pipe
K&N Drop in filter
4.10 Ford Racing Gears
SCT Tuned by Bama
Best 1/4 13.55 @ 102.11
Fauxnali is offline   Reply With Quote
Old 09-04-2013, 12:23 PM   #104
Registered User
jsox85's Avatar
Join Date: Aug 2013
Location: lowell, in
Posts: 6
Re: Gears - to answer the questions once and for all

should i go 3:90 or stay 3:55 on my automatic 03 mach with a p1 procharger.... my friend had 3:90s on his 99 cobra and i was def impressed.... if anyone has tried one on a blown mach id love to see what ya thought
jsox85 is offline   Reply With Quote
Old 09-20-2013, 03:14 PM   #105
Fosters's Avatar
Join Date: Dec 2003
Location: Chandler, AZ
Posts: 1,550
Re: Gears - to answer the questions once and for all

I guess I should update this thread with another calculation since this seems more appropriate now for my garage queen mach...

4th gear (1:1), trap speeds at 6100rpm (stock engine peak) 6500 rpm (minor bolt-ons shift point), 6800 rpm (psr/cobra cams shift point)
HTML Code:
26" tire:
Gear	6100rpm		6500rpm		6800rpm
3.55:	133		141.7		148.2
3.73:	126.5		134.8		141.1
3.90:	121		129		134.9
4.10:	115.1		122.7		128.3
4.30:	109.8		117		122.4
4.56:	103.5		110.3		115.4

28" tire:
Gear	6100rpm		6500rpm		6800rpm
3.55:	143.2		152.6		159.6
3.73:	136.3		145.2		151.9
3.90:	130.3		138.9		145.3
4.10:	124		132.1		138.2
4.30:	118.2		126		131.8
4.56:	111.5		118.8		124.3
4.88:	104.2		111		116.1
I'm on 4.56s right now, and I think that for the car's 10 year birthday this year (xmas 2013) it's time I stop messing around with N/A stuff and strap a bottle to it. Since I love the 4.56s on the street, and not wanting to shift into 5th at the track, I think a 28" slick will be in my future. I imagine a lot of the people in my situation, running out of bolt-ons and trapping over 110 are in the same boat; and adding a bunch more power requires either less gear or a bigger tire. For me bigger tire makes more sense - more traction, and keep the 4.56s and 26" tires on the street, if I ever drive it on the street again.
2013 gt - TBD
2004 mach1 - 12.31@110.17, 1.645 60' - SOLD
Fosters is offline   Reply With Quote
Old 09-20-2013, 05:27 PM   #106
Dark Knight
Mach828's Avatar
Join Date: Nov 2009
Location: Albuquerque, NM
Posts: 5,759
Re: Gears - to answer the questions once and for all

For what its worth, my buddy went from being really far back in his bolt on 3V to being a lot closer to my Mach when he switched from 3.30s to 4.10s.

However he only traps 96mph vs my 104mph. (282hp dyno vs my 315hp).

Vortech V2 S-trim, E85, A2A Treadstone, Comp cams, built engine, full exhaust, built rear, built 4r70, more mods.

Tuned by me with SCT Advantage
Mach828 is offline   Reply With Quote
Old 03-21-2018, 02:24 PM   #107
Registered User
AlloyPony's Avatar
Join Date: Jan 2018
Location: Central Kentucky
Posts: 161
Re: Gears - to answer the questions once and for all

In our group, all the guys had 4.10 gears with a few bolt ons. I was stock with 3.27s (we're talking GTs here). In street races, I'd stay fender to fender with them every time, whether from a dig or from a roll. After I did some bolt-ons but left the gears stock, I started to pull on them. They couldn't figure out why and swore that I had nitrous or something. Nope...it's just that while my car was winding out, they were in the next lane shifting like crazy.

So... for this Mach 1 I'm planning to leave the 3.55s in place. Car seems to pull really well against highly modded 3V cars, so I'm happy with it.
2003 Mach 1 - TR3650 - Mac O/R H-pipe - Ford Racing driveshaft - Modified air intake - Nitto Motivo 315/35s on 10.5" FR500 wheels - Steeda clutch adjuster
AlloyPony is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump

All times are GMT -4. The time now is 01:44 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
(c) 2002-2013 Mach1Registry.com