Short belt mod

firefighter813x · 2008-12-18 14:26:42

My belt contacts the lower alt. bolt.:bang:

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Jan 29, 2009 | 04:36 PM

#21

jcoker

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From: Griffin, Ga

My belt contacts the lower alt. bolt.

Jan 29, 2009 | 04:47 PM

#22

nemss1

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From: Edmond, OK

Quote:

Originally Posted by jcoker

My belt contacts the lower alt. bolt.

ive heard of people having this problem and leave the lower alt bolt out or trim the head of the bolt

Jan 29, 2009 | 05:06 PM

#23

the_merv

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From: The Beach...

^^I've seen that done.

Jan 29, 2009 | 05:51 PM

#24

nemss1

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From: Edmond, OK

Quote:

Originally Posted by jcoker

My belt contacts the lower alt. bolt.

u using the stock crank pulley?

Jan 29, 2009 | 06:16 PM

#25

jcoker

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From: Griffin, Ga

Its an underdrive, I may grind the face of the bracket a little so I dont have to cut the bolt down so much.

Jan 29, 2009 | 08:50 PM

#26

nemss1

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From: Edmond, OK

Quote:

Originally Posted by jcoker

Its an underdrive, I may grind the face of the bracket a little so I dont have to cut the bolt down so much.

ya underdrive pulleys can cause that prob. ya thats what id do, find what is making contact with the belt and grind'r off

Jan 29, 2009 | 09:31 PM

#27

chrs1313

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Quote:

Originally Posted by nemss1

ya underdrive pulleys can cause that prob. ya thats what id do, find what is making contact with the belt and grind'r off

i removed the bolt...just to post this again it absolutely gained nothing in back to back runs...

Jan 29, 2009 | 10:05 PM

#28

nemss1

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From: Edmond, OK

Quote:

Originally Posted by chrs1313

i removed the bolt...just to post this again it absolutely gained nothing in back to back runs...

very true chris, no gains. i removed mine because i do remove just about everything i dont need for the car to run down the track

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Jan 29, 2009 | 11:04 PM

#29

Z28/2002

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From: Your girl's back door giving her the long stroke while you're at work

I had to trim the bolt as well

Jan 30, 2009 | 03:39 PM

#30

jcoker

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From: Griffin, Ga

I'm just trying to get the weight down and I don't drive the car on the street very often. (looking for that 9 second motor pass)

Aug 16, 2009 | 03:17 PM

#31

Intercooler2

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From: North East, MD

I know it has been a while for this thread. I have a 25% underdrive now and was pondering the short belt bypass so dug this up to find the part number. In reading here I wonder if anyone had a gain. Seems a guy I saw at the track one time said yes. Instead of spending the $18.00 I was thinking just yank the A/C belt.... zero $$$ to do and see. Thoughts on this?

Aug 18, 2009 | 08:42 AM

#32

Intercooler2

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From: North East, MD

Not turning the A/C and bypassing the powersteering has to help just a little right? Might not be but 5 HP but still

Sep 9, 2009 | 01:07 AM

#33

Ls1Rook

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From: Texas

Did anyone else try this

Sep 9, 2009 | 01:33 AM

#34

LS1nut377

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From: Amarillo, Texas

im thinking about doing this in a couple of weeks for track day. but im not sure yet. a buddie of mine did the short belt mod on a dyno with heads and cam and pulled 10rwhp
from it on a dyno.so i dont know. might be worth it for track day

Sep 9, 2009 | 07:50 PM

#35

Ls1Rook

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From: Texas

Do it let us know, i might try it too

Oct 24, 2009 | 06:53 PM

#36

Gray86hatch

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From: Battle Creek Mi

Has anyone found a ribbed idler pulley to go on the alt bracket?

I have my advance auto girl working on it for me monday.

For the belt to bolt issue what about a 5 rib belt.

I have this on my ford motor with no issues

Tim

Feb 11, 2010 | 12:17 PM

#37

LS88FoxBody

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From: Demotte , IN

I have a 5.3 I'm putting in a fox body. Looking to go with a manual Rack. Currently Have a Truck water Pump ,and all other normal accesories. Can I get away with just going with the F body alternator bracket or do I need to change other stuff?

Feb 11, 2010 | 01:09 PM

#38

Gray86hatch

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From: Battle Creek Mi

I know that the balancer needs to match the alt braket.

Not sure on the WP.

I am Just modded the bracket the other night for the belt to bolt clearance. As soon as I get the crank in the block I will have it mocked up to verify all the fitment.

Tim