Gears and T.B.

FdMust88 · 06-25-2001, 09:55 AM

I just purchased a 91 LX a week and 1/2 ago and have already made some modifications. A added a Mac Cat-back system, Mac Cold Air induction kit, Pro 5.0 Shifter, Pulleys, and gave her a good tune up. I plan on getting gears within the next couple of weeks. I was wondering if I should go with 3.55's or 3.73's? I do plan on adding a Holley Systemax 2 system in the future and then a supercharger, vortech, ATI?.. Any suggestions would be great on what gears to get and why.. I also plan on getting a new throttle body in the near future and was wondering what size I should go with, a 65mm or 70mm? Keep in mind my previous mods and also my future mods...

Thanks...

302 LX Eric · 06-25-2001, 10:02 AM

Since you will be adding a supercharger in the future, I would go with the 3.55's. Good street manners, good highway gas mileage and enough gear to get you down the track in reasonable fashion.

As for the TB, I think the Holley intake has a 70mm opening , but I am not sure on this. If it does, then you might as well go with the 70mm. I wouldn't go any bigger unless you are going to make your Stang into a drag-only type machine.

Congratulations on your purchase!

E

------------------
1991 5.0 LX Coupe - 38,000 miles

13.17 @ 106.14 mph w/ 2.138 60'

[This message has been edited by 302 LX Eric (edited 06-25-2001).]

dinomite · 06-25-2001, 10:16 AM

I agree, cause you are going to be blowing it later, get 3.55s.

FdMust88 · 06-25-2001, 10:24 AM

Thanks Guys.. I'm gonna go check and see if Summit has the Holley 70mm TB and spacer. I think they do.. I'm also gonna see if they have a Pro-M 75mm MAF. I'll need to schedule an appointment for the gears, I think you sold me on the 3.55's. I think it's gonna run me around $500 for them to do the swap. There aren't too many places around here to get work like that done..

Thanks Again..

06-26-2001, 12:04 PM

3.55's and the 70 mm TB!

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'90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach spring kit; Southside welded subs; K&N cone filter charger; Hurst shifter; fiberglass turbo hood; A/C-less; rear seat-less; cat-less; 2 chamber Flos; Corbeau racing seats (fronts);
30# injectors; JMS Chip; 190 lb fp; TFS track heat Intake (12.299 @ 113)

fiveohpatrol · 06-26-2001, 11:12 PM

500 is a little steep, most people pay about 400, but a good thing to try is to go to a few ford dealership service departments and ask if any of the guys does side work on the weekend and could do the gears, theres a guy here in my town that will do the swap for about $80 labor

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88 Notch, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, 1.7RR's, BBK headers, off-road H-pipe, flowmasters, subframe connectors, 65mm TB, shift kit, March ram air ,MSD coil, U/L control arms, 155lph fuel pump, cheap 2800 stall, Crane Adj.FPR, best 1/4--> 13.77@101.35

06-25-2001, 09:55 AM	#1
FdMust88 Registered Member Join Date: Apr 1999 Location: Massachusetts Posts: 84	Gears and T.B. I just purchased a 91 LX a week and 1/2 ago and have already made some modifications. A added a Mac Cat-back system, Mac Cold Air induction kit, Pro 5.0 Shifter, Pulleys, and gave her a good tune up. I plan on getting gears within the next couple of weeks. I was wondering if I should go with 3.55's or 3.73's? I do plan on adding a Holley Systemax 2 system in the future and then a supercharger, vortech, ATI?.. Any suggestions would be great on what gears to get and why.. I also plan on getting a new throttle body in the near future and was wondering what size I should go with, a 65mm or 70mm? Keep in mind my previous mods and also my future mods... Thanks...

06-25-2001, 10:02 AM	#2
302 LX Eric or '331 LX Eric' Join Date: Jan 1999 Location: Columbus, Ohio Posts: 2,142	Since you will be adding a supercharger in the future, I would go with the 3.55's. Good street manners, good highway gas mileage and enough gear to get you down the track in reasonable fashion. As for the TB, I think the Holley intake has a 70mm opening , but I am not sure on this. If it does, then you might as well go with the 70mm. I wouldn't go any bigger unless you are going to make your Stang into a drag-only type machine. Congratulations on your purchase! E ------------------ 1991 5.0 LX Coupe - 38,000 miles 13.17 @ 106.14 mph w/ 2.138 60' [This message has been edited by 302 LX Eric (edited 06-25-2001).]

06-25-2001, 10:16 AM	#3
dinomite The Dude Join Date: Feb 2001 Location: Arlington, VA Posts: 1,262	I agree, cause you are going to be blowing it later, get 3.55s.

06-25-2001, 10:24 AM	#4
FdMust88 Registered Member Join Date: Apr 1999 Location: Massachusetts Posts: 84	Thanks Guys.. I'm gonna go check and see if Summit has the Holley 70mm TB and spacer. I think they do.. I'm also gonna see if they have a Pro-M 75mm MAF. I'll need to schedule an appointment for the gears, I think you sold me on the 3.55's. I think it's gonna run me around $500 for them to do the swap. There aren't too many places around here to get work like that done.. Thanks Again..

06-26-2001, 12:04 PM	#5
bada$$lx Guest Posts: n/a	3.55's and the 70 mm TB! ------------------ '90 LX 5.0; 12K original miles (no sh*&); 3.55 gears; pulleys;Edelbrock Performer Heads; BBK shorties; MSD 6AL box w/ blaster 2 coil; Motorsport E303 cam; Pro-M 75mm MAF; BBK 70mm TB; Eibach spring kit; Southside welded subs; K&N cone filter charger; Hurst shifter; fiberglass turbo hood; A/C-less; rear seat-less; cat-less; 2 chamber Flos; Corbeau racing seats (fronts); 30# injectors; JMS Chip; 190 lb fp; TFS track heat Intake (12.299 @ 113)

06-26-2001, 11:12 PM	#6
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	500 is a little steep, most people pay about 400, but a good thing to try is to go to a few ford dealership service departments and ask if any of the guys does side work on the weekend and could do the gears, theres a guy here in my town that will do the swap for about $80 labor ------------------ 88 Notch, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, 1.7RR's, BBK headers, off-road H-pipe, flowmasters, subframe connectors, 65mm TB, shift kit, March ram air ,MSD coil, U/L control arms, 155lph fuel pump, cheap 2800 stall, Crane Adj.FPR, best 1/4--> 13.77@101.35