race rearend tips

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race rearend tips

Postby 84foxbox on Wed Jul 24, 2013 8:36 pm

I have the stock 8.8 in my car with gears. But the car is gettin a sbc with glide installed right now. I know I'm gonna go and first pass hurt the rearend.. and mustang lovers out there that have 600hp and have a rear that holds up. Its a 84 foxbody. Small tire car. Apreciate any advice you have.. thanks
1984 Ford Mustang GT (sbc)
2005 Ford F-150 Lariat 4x4
2004 Dodge Neon SRT4 Stage 2
2011 Ford Fusion Sport
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Re: race rearend tips

Postby durty on Wed Jul 24, 2013 9:59 pm

ive been 10.72 @ 123 with a 1.54 60' on a bone stock 4 lug 8.8 rear with a 3.55 gear. had a 317 sbf, c4, and a 150shot
never bring show to a go fight...
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Re: race rearend tips

Postby amcamx on Thu Jul 25, 2013 6:45 am

The taller the gear (lower number) the better it will hold up.
So 5.13 and 30in tires will not hold up as well as 3.91 and 26in tires, even though the overall ratio may be the same.
Do you want to spend thousands, so it will never break, or rebuild it every several years?
Coming out of the water, one tire can bite before the other, and burn up a clutch style posi.
If street driven, a locker may be best, but they can cause noise.
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Re: race rearend tips

Postby 84foxbox on Thu Jul 25, 2013 9:17 am

Its strickly a drag car now. I just didn't know the carrect gear for having the glide 2 speed.
1984 Ford Mustang GT (sbc)
2005 Ford F-150 Lariat 4x4
2004 Dodge Neon SRT4 Stage 2
2011 Ford Fusion Sport
84foxbox
 
Posts: 129
Joined: Thu Feb 09, 2012 6:48 pm
Location: ottawa ks

Re: race rearend tips

Postby zziggy on Thu Jul 25, 2013 5:06 pm

A glide has a 1:1 hi gear as do all trannys except OD trannys of course.

112-115 mph with 28" tall slicks using 4.10 gears at about 6000 rpm.
You can do the math from there.
114 mph / 6 = 19 mph per 1000 rpm. so 120 mph = 6300 rpm
114 mph x 4.10 = 467.4 /4.56 = 102.5 mph @ 6000 rpm etc
71 Camaro 355 NA
11.1906 @ 118.92
60' time 1.5067
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Re: race rearend tips

Postby 84foxbox on Fri Jul 26, 2013 8:40 am

Ok thx for the advice.
1984 Ford Mustang GT (sbc)
2005 Ford F-150 Lariat 4x4
2004 Dodge Neon SRT4 Stage 2
2011 Ford Fusion Sport
84foxbox
 
Posts: 129
Joined: Thu Feb 09, 2012 6:48 pm
Location: ottawa ks


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