• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Does the DM SpeedCal work on a Mach 1?

  • Thread starter Thread starter twogts4us
  • Start date Start date Feb 21, 2011

twogts4us

15 Year Member
Apr 1, 2004
4,188
12
79
Dunedin, FL
Feb 21, 2011
#1
  • Feb 21, 2011
  • #1
I was just reading the instructions and the table of gear ratios and dip switch settings and it does not reference the stock 3.55 gearset..? (It only lists 3.08, 3.27, and 2.73) So am I to understand that this lil box won't work in my Mach?

Mustang Speed Calibrator - DIP Switch Settings at AmericanMuscle.com

Thanks!
Chris
 

nyuk98gt

15 Year Member
Oct 10, 2000
1,427
6
79
Chesterfield, MO
Feb 21, 2011
#2
  • Feb 21, 2011
  • #2
twogts4us:

It will work just fine. You have to phone DM and they will give you the right DIP switch settings for the 3.55's. Before you buy the SpeedCal, call DM and tell them what vehicle you have. Some +99's use the "Extended Range" SpeedCal. I know that some manual transmissions need the E/R version, some don't.

What's the new gear ratio, please?

HTH,

Chris
 

twogts4us

15 Year Member
Apr 1, 2004
4,188
12
79
Dunedin, FL
Feb 21, 2011
#3
  • Feb 21, 2011
  • #3
I originally planned for the typical 4.10s, but since I already has 3.55s, I've been thinking about 4.30s - I want to be sure I get that neck snapping wow you feel when going from stock 3.08 or 3.27 to 4.10. I have a little fear that 3.55 to 4.10 might not be as big of a change as I hope for, hence the thought about going to 4.30. (4.56 seems way over the top - I don't do much highway driving, but I do some highway driving.)

Thanks!
Chris
 

nyuk98gt

15 Year Member
Oct 10, 2000
1,427
6
79
Chesterfield, MO
Feb 22, 2011
#4
  • Feb 22, 2011
  • #4
twogts4us:

Thanks for the additional info. I think you will be happy with 4.30's except, perhaps, in the rain.

You're in luck: 3.55's to 4.30's is the same as 3.08's to 3.73's. The ratio is 1.211 for both. I haven't checked the table but I bet you will find the DIP switch setting you need (3.08 --> 3.73).

Chris
 

twogts4us

15 Year Member
Apr 1, 2004
4,188
12
79
Dunedin, FL
Feb 22, 2011
#5
  • Feb 22, 2011
  • #5
yeah driving in the rain always suck...and we here in the sunshine state do get our fair share during the summertime afternoon showers and storms. It's fun just trying to motivate 315 tires from a standstill without spinning...even with 3.55s. I'm sure more gear would aggravate this, but honestly I avoid driving in the rain. I do trust in my own skills and common sense, but it's the other people I am most worried about. (Most of these FL drivers are crazy, dumb, stupid, ignorant, lazy idiots...and that's when it's dry!)

Just today I had another white knuckle experience. I'm on a 4 lane divided road - As I approached an intersection with a green light, for some unknown reason my (left) lane was stopping, but the outside (right) lane was flowing fine, so when the traffic in that outside lane cleared, I hopped over into that lane. (Note this lane change was completely legal, well before the solid center line)

I quickly discovered what the holdup was. One of our FL idiots decided he needed to turn right at this intersection and decided to stop in the left hand lane and then make his right turn.

I guess he was watching the other traffic but failed to account for those of us who grew tired of waiting behind an idiot who stops in the middle of the road to turn. I hate these jackoffs! I am thankful for anti lock because you instinctively just nail the brake pedal in instances like this.
 
You must log in or register to reply here.

Similar threads

Place to Avoid: Jamison Auto Group in Gulfport, MS
  • D Durden
  • Oct 20, 2025
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • 2 3
Replies
45
Views
2K
1965 - 1973 Classic Mustangs -General/Talk- Feb 4, 2026
nickyb
2004 Mach 1 crank but no start. dying inside
  • gavinmgrant
  • May 23, 2022
  • SN95 4.6L Mustang Tech
  • 2 3
Replies
50
Views
10K
SN95 4.6L Mustang Tech Jun 11, 2022
Mach1.0
M
SN Mustang Magnum T56 swap
  • revhead347
  • May 24, 2024
  • 1994 - 1995 Specific Tech
Replies
15
Views
6K
1994 - 1995 Specific Tech Jun 28, 2026
GearHeadGuy
Progress Thread Project 2nd Chance Pony - Status Update
  • JKWilson61
  • Dec 14, 2019
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 2
Replies
22
Views
6K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Jun 30, 2020
JKWilson61
Definitely not a new member (joined in 2005), but beyond searching I'll finally be posting:) New to me 1983 4-Eye Notch in my possession now:)
  • bahndrvr
  • Jan 31, 2019
  • The Welcome Wagon
Replies
4
Views
4K
The Welcome Wagon Feb 8, 2019
Olivethefet
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?