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???Super Short Belt Mod.....

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Old 01-13-2010, 02:58 PM
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Question ???Super Short Belt Mod.....

what size belt would i need to run a belt from a 25% underdrive crank pulley to the alternator only???

is BMR the only company that makes the adjustable alt bracket???
.....if not, what other company makes an adjustable alt bracket???
Old 01-13-2010, 03:11 PM
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use a string to measure around the pulleys and then go get one from a parts store.
Old 01-13-2010, 03:14 PM
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ok i did my research and found one answer...30.5"

someone chime in to confirm that
Old 01-13-2010, 04:45 PM
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you have the adjustable alt right now? with the tensionor, 50.5 is coing to mind? I bought one but can't steer anymore one hand with it. Stock pulley was 51.5 I belive.

you have a race EWP? and dont need the belt for that too? if not buget just run it up to the tensionor , and take the PS off. you probally already now this
Old 01-13-2010, 05:52 PM
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Originally Posted by studderin
you have the adjustable alt right now? with the tensionor, 50.5 is coing to mind? I bought one but can't steer anymore one hand with it. Stock pulley was 51.5 I belive.

you have a race EWP? and dont need the belt for that too? if not buget just run it up to the tensionor , and take the PS off. you probally already now this
there's no way its a 50.5. i have stock crank pulley and stock waterpump right now (deleted PS) and the belt is a 52.5. 51.5 is the same setup but with the UD pulley. short belt and super short belt are 2 different things. steering isnt that bad. ive deleted PS over 2 years ago. super short belt is running a belt from the crank to only the alt. no, u do not need a belt for the race EWP and no need for a tensioner. haha so yes i already know this. ive got the BMR alt bracket, UD pulley and meziere race pump coming in the mail

back to my original question, i was asking what size is the super short belt with UD pulley. which i researched already and believe it is 30.5
Old 01-13-2010, 08:06 PM
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i got my bracket from PCM 4 less
Old 01-13-2010, 08:25 PM
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Originally Posted by cbra-klla
i got my bracket from PCM 4 less
will check them also. thank you for the input
Old 01-13-2010, 11:05 PM
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The BMR instructions tell you the belt length for stock and underdrive pulleys. I used the one that the instructions recommended but had to do some serious cussing to get it on there, as it was a touch on the tight side. Once on it was fine and did not bottom out the adjustment. I am running the BMR bracket with a powerbond UDP.
Old 01-13-2010, 11:08 PM
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Here you go: http://www.bmrfabrication.com/INSTALL/AB001.pdf

The instructions do say 30.5. I ordered the gates belt with the number they have listed.
Old 01-14-2010, 12:00 AM
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thx 5.3LJimmy for the part# and confirming that the belt size for the UDP IS 30.5
Old 01-14-2010, 10:23 AM
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I mounted the OEM tensioner in reverse (used one bolt to hold it against the alt bracket and the interference with the alt bracket kept it from rotating)

the bmr bracket is probably a good way to go though...but this way was free



My belt was 38" long but the crank pulley was close to OEM diameter (maybe 10% UD)

Make GEO
Model STORM
Beginning Year 1991
Ending Year 1993
Engine Type L4
Liter 1.6
CID 98
Engine Size 1.6L/98
Engine Family Suzuki 4-cylinder
Belt Fitment Power steering, without A/C
Old 01-14-2010, 02:42 PM
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^^^props fireball for the free way to do things. that actually doesnt look bad at all and being free is another plus...but ya im just gonna go with the BMR alt bracket...no offense
Old 01-15-2010, 05:55 PM
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Fireball what dampener are you using?
Old 01-16-2010, 05:59 AM
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I tried it the way you had it set up Fireball, but hte tensioner wasn't sitting flat and it kept throwing the blet at idle... I ended up buying the BMR one because I couldn't get the thing to line up right, as soon as I tightened the bolt the tensioner kept getting pushed to one side, never really did figure out why, just stopped fighting with it before it gave me a complex

Last edited by Fireball; 01-16-2010 at 08:24 AM.
Old 01-16-2010, 08:22 AM
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Originally Posted by daschra79
Fireball what dampener are you using?
ATI dampener
Old 01-16-2010, 08:24 AM
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Originally Posted by JL ws-6
I tried it the way you had it set up Fireball, but hte tensioner wasn't sitting flat and it kept throwing the blet at idle... I ended up buying the BMR one because I couldn't get the thing to line up right, as soon as I tightened the bolt the tensioner kept getting pushed to one side, never really did figure out why, just stopped fighting with it before it gave me a complex
I didn't have a choice on mine due to how my header was positioned
Old 01-16-2010, 11:35 AM
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Makes sense, I just couldn't get the tensioner to line up right, thing was just off enough so it wouldn't work.
Old 01-16-2010, 06:30 PM
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Originally Posted by Fireball
ATI dampener
Thanks
Old 01-17-2010, 12:59 AM
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Can anyone verify if the bmr alt bracket works with the stock waterpump, alternator, and ud pulley? I have no ps or ac and would like to remove the idler and tensioner.
Old 01-17-2010, 01:20 AM
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Originally Posted by CAMARO_THUNDER
Can anyone verify if the bmr alt bracket works with the stock waterpump, alternator, and ud pulley? I have no ps or ac and would like to remove the idler and tensioner.
it would NOT work that way. the belt wouldnt even touch the waterpump pulley. the belt has to wrap under (backside touching) the waterpump pulley. u have to keep the tensioner for the stock waterpump


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