question on fuel system and rear gears and launching

vetteeatr · 08-12-2001, 11:20 AM

I have a 88 mustang GT whichi was set up for drag racing unfortunately i m poor and cant afford the thing unless i get better gas mileage. It has 3.73 rear gears in it and im guessing this woudl make it get wrose gas mileage. If this is so how much worse mileage would oyu guys think? Secondly my fuel system is crazy it has 36 ibs injectors and all this crap however when i boguht tha car i didnt remebr seeing anythign about a diffrent fuel pump. The car is putting out approximately 350 horses but from what parts it has on it should be at least 400. Could the car not be getting enough fuel? Any ideas. Also i cant launch what so ever i boufght new rear tires but they are slightly less tacky as the old ones just like one level above so i dont get osme lame 15000 miles per tire. But i spin them like crazy. How can i get more tractio? thanks guys

Mr 5 0 · 08-12-2001, 05:28 PM

3.73 ratio rear gears are almost standard for performance-minded Mustangs. The difference in mpg from stock (2.73) gears is fairly small, but if you went that route (2.73 or 3.08 rear gears) it would certainly make launch traction improve and offer slightly better mpg. Cost would be around $400. installed. One option.

Another option would be to leave the rear gears alone and get after-market control arms and shocks for better traction. Same cost.

If you have 36# injectors you very likely have an aftermarket (higher lph) FP.
You can check that out to be certain.
The regulator may still be stock (non-adjustable) or if it's an aftermarket adjustable regulator, it may need to be re-adjusted for better performance.

08-12-2001, 11:20 AM	#1
vetteeatr Registered Member Join Date: Apr 2001 Location: Olney, Illinois, USA Posts: 212	question on fuel system and rear gears and launching I have a 88 mustang GT whichi was set up for drag racing unfortunately i m poor and cant afford the thing unless i get better gas mileage. It has 3.73 rear gears in it and im guessing this woudl make it get wrose gas mileage. If this is so how much worse mileage would oyu guys think? Secondly my fuel system is crazy it has 36 ibs injectors and all this crap however when i boguht tha car i didnt remebr seeing anythign about a diffrent fuel pump. The car is putting out approximately 350 horses but from what parts it has on it should be at least 400. Could the car not be getting enough fuel? Any ideas. Also i cant launch what so ever i boufght new rear tires but they are slightly less tacky as the old ones just like one level above so i dont get osme lame 15000 miles per tire. But i spin them like crazy. How can i get more tractio? thanks guys

08-12-2001, 05:28 PM	#2
Mr 5 0 Conservative Individualist Join Date: May 1997 Location: Wherever I need to be Posts: 7,487	3.73 ratio rear gears are almost standard for performance-minded Mustangs. The difference in mpg from stock (2.73) gears is fairly small, but if you went that route (2.73 or 3.08 rear gears) it would certainly make launch traction improve and offer slightly better mpg. Cost would be around $400. installed. One option. Another option would be to leave the rear gears alone and get after-market control arms and shocks for better traction. Same cost. If you have 36# injectors you very likely have an aftermarket (higher lph) FP. You can check that out to be certain. The regulator may still be stock (non-adjustable) or if it's an aftermarket adjustable regulator, it may need to be re-adjusted for better performance.