setups to prevent alt belt exit

Kris Kristofferson · 10-04-2010, 12:50 PM

Hey guys,
What are y'all doing to prevent the alt belt flying out? I guess the simplist is to use a electric water pump and no alt...

Run to Rund · 10-04-2010, 01:01 PM

Deep groove pulleys, correct pulley alignment.

Jim Kaekel · 10-04-2010, 03:29 PM

X2, plus larger dia. alternator pulley

Kris Kristofferson · 10-04-2010, 03:53 PM

Hey thanks guys,
I went with a deeper grove but I had to stay with the same diameter in order to keep the charging capabilities up..

Here is a post from another form I am on:

http://www.chevelles.com/forums/showthread.php?t=330257

Mark Faul · 10-04-2010, 04:09 PM

Once I used a stud instead of a bolt in one of the water pump mounting bolts that stuck out past the belt, and used some kind of sleeve over the stud to keep from chewing up the belt. I got lucky that the stud was less than 1/2' away from the belt. All it did was keep the belt under centrifugal force to not expand or "grow" and it kept it on. This was a street/strip car that had the alternator on the driver's side past the valve cover. Long belt!

gmonde · 10-04-2010, 05:42 PM

if your using a delco alternator with the internal regulator ,,you can get a one wire kit that will charge 13.50 at idle and 14.50 at higher rpm and thats with a bigger pulley ,and go with an electric water pump ,,it helps with cool downs gmonde

Bill Edgeworth · 10-04-2010, 06:26 PM

Depending on the design of your pulleys you may be able to use a narrower belt such as a 3L or 3VX which will sit lower in the groove. As I said it depends on your pulley design. You don’t want the belt to bottom out in the grove.

Kris Kristofferson · 10-04-2010, 11:15 PM

Good suggestions guys,
Tonight a friend dropped by and gave me some advice on aligning the pulleys. The alternator had to go back about about three eights of a inch..

I also improved the idler pulley by putting some more angle on it, It mostly acts as Mark Faul described..

It seems like in the case of alt belt retention there are a a lot of ways to skin a cat..

Kris

cad · 10-05-2010, 01:35 AM

Long or short pump?
GM makes a solid bracket for short water pump Corvettes from 75-81 which bolts to the front of the head. I use on my SBC in my 68 Camaro along with a Z28 alternator pulley. I spin it about 7200.

Kris Kristofferson · 10-05-2010, 12:23 PM

Hello Cad,
It is a long pump for a BBC, I had some original brackets but they didn't work well for my small casing CS-130 alt...
I had a friend over last night and he pointed me in the right direction in terms of alt alignment..The alt was too far forward so I shimmed it back..This should help a lot.
Kris

10-04-2010, 12:50 PM	#1
Kris Kristofferson Junior Member Join Date: Nov 2009 Location: Ottawa, Ont Posts: 68 Likes: 1 Liked 0 Times in 0 Posts	setups to prevent alt belt exit Hey guys, What are y'all doing to prevent the alt belt flying out? I guess the simplist is to use a electric water pump and no alt...

10-04-2010, 01:01 PM	#2
Run to Rund Senior Member Join Date: Sep 2007 Location: Henderson, NV Posts: 583 Likes: 8 Liked 54 Times in 27 Posts	Re: setups to prevent alt belt exit Deep groove pulleys, correct pulley alignment.

10-04-2010, 03:29 PM	#3
Jim Kaekel VIP Member Join Date: Jul 2002 Location: Michigan Posts: 1,226 Likes: 133 Liked 529 Times in 107 Posts	Re: setups to prevent alt belt exit X2, plus larger dia. alternator pulley __________________ Jim Kaekel 3836 STK

10-04-2010, 03:53 PM	#4
Kris Kristofferson Junior Member Join Date: Nov 2009 Location: Ottawa, Ont Posts: 68 Likes: 1 Liked 0 Times in 0 Posts	Re: setups to prevent alt belt exit Hey thanks guys, I went with a deeper grove but I had to stay with the same diameter in order to keep the charging capabilities up.. Here is a post from another form I am on: http://www.chevelles.com/forums/showthread.php?t=330257

10-04-2010, 04:09 PM	#5
Mark Faul Member Join Date: Jan 2002 Location: Tacoma,WA Posts: 341 Likes: 2 Liked 43 Times in 9 Posts	Re: setups to prevent alt belt exit Once I used a stud instead of a bolt in one of the water pump mounting bolts that stuck out past the belt, and used some kind of sleeve over the stud to keep from chewing up the belt. I got lucky that the stud was less than 1/2' away from the belt. All it did was keep the belt under centrifugal force to not expand or "grow" and it kept it on. This was a street/strip car that had the alternator on the driver's side past the valve cover. Long belt!

10-04-2010, 05:42 PM	#6
gmonde Senior Member Join Date: Nov 2007 Posts: 615 Likes: 56 Liked 165 Times in 59 Posts	Re: setups to prevent alt belt exit if your using a delco alternator with the internal regulator ,,you can get a one wire kit that will charge 13.50 at idle and 14.50 at higher rpm and thats with a bigger pulley ,and go with an electric water pump ,,it helps with cool downs gmonde

10-04-2010, 06:26 PM	#7
Bill Edgeworth Member Join Date: Oct 2006 Location: Tacoma, WA Posts: 258 Likes: 0 Liked 0 Times in 0 Posts	Re: setups to prevent alt belt exit Depending on the design of your pulleys you may be able to use a narrower belt such as a 3L or 3VX which will sit lower in the groove. As I said it depends on your pulley design. You don’t want the belt to bottom out in the grove. __________________ Bill Edgeworth 6471 STK

10-04-2010, 11:15 PM	#8
Kris Kristofferson Junior Member Join Date: Nov 2009 Location: Ottawa, Ont Posts: 68 Likes: 1 Liked 0 Times in 0 Posts	Re: setups to prevent alt belt exit Good suggestions guys, Tonight a friend dropped by and gave me some advice on aligning the pulleys. The alternator had to go back about about three eights of a inch.. I also improved the idler pulley by putting some more angle on it, It mostly acts as Mark Faul described.. It seems like in the case of alt belt retention there are a a lot of ways to skin a cat.. Kris

10-05-2010, 01:35 AM	#9
cad Senior Member Join Date: Apr 2009 Location: Omaha, NE Posts: 696 Likes: 198 Liked 91 Times in 51 Posts	Re: setups to prevent alt belt exit Long or short pump? GM makes a solid bracket for short water pump Corvettes from 75-81 which bolts to the front of the head. I use on my SBC in my 68 Camaro along with a Z28 alternator pulley. I spin it about 7200.

10-05-2010, 12:23 PM	#10
Kris Kristofferson Junior Member Join Date: Nov 2009 Location: Ottawa, Ont Posts: 68 Likes: 1 Liked 0 Times in 0 Posts	Re: setups to prevent alt belt exit Hello Cad, It is a long pump for a BBC, I had some original brackets but they didn't work well for my small casing CS-130 alt... I had a friend over last night and he pointed me in the right direction in terms of alt alignment..The alt was too far forward so I shimmed it back..This should help a lot. Kris