Drag Racing Discussions > Front Engine Dragsters

Rear Diff

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Racing6:
What is the most common width for a FED?

jspell:
Depends on main hoop dimension, mine is a 21" with a 32.375" housing.

fuel749:
Depends on the width of your shoulder hoop and what you have for wheel back space. Don't forget tire bulge. Be careful of the dimensions you get, some might give you bare housing width while others might give you axle to axle width. Pretty easy to figure out what you need if you own the wheels, tires and chassis.

dreracecar:
21" OD shoulder hoop
Tire bulge to wheel flange surface  5 1/8"
Olds bearing ends
27" bearing flange to bearing flange
works out to 3/4-7/8 tire side to body if using drum brakes or early airheart style (hat behind axle flange)
If useing over flange brake hats (example- Wilwood) you can either have more clearence or reduce the overall flange to flange by 1/2"

wideopen231:
mines 33" bearing to bearing 39 flange to flange. Should have been 40 but I forgot to allow for spread at rear of chassis.

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