Supercharger Pulley Modification
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Guys my dad is currently in in Detroit and his first cousin is a machinest.
My dads cousin said he can machine down my pulley to any diameter I want.
I have the Code 3 pulley which is 65mm I think? now I'm thinking of giving him my original pulley to machine down to 60mm BUT I'd only use it for drag racing I know it can overrev and fry the supercharger.
My question is how much extra boost and how much quicker will it make me in the q/mile? is it possible to make it even smaller then 60mm? with added bonuses?
John
My dads cousin said he can machine down my pulley to any diameter I want.
I have the Code 3 pulley which is 65mm I think? now I'm thinking of giving him my original pulley to machine down to 60mm BUT I'd only use it for drag racing I know it can overrev and fry the supercharger.
My question is how much extra boost and how much quicker will it make me in the q/mile? is it possible to make it even smaller then 60mm? with added bonuses?
John
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Okay I've done some reading and research and it seems that if it gets machined to 62mm it will rev the s/c to 15,000rpms which is what the 185 crank does, now does anyone know what the supercharger can take as a max? maybe 16,000rpms? remember I'm only planning to use this "super pulley" for drag racing no street driving lol
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Originally Posted by kolevski
Okay I've done some reading and research and it seems that if it gets machined to 62mm it will rev the s/c to 15,000rpms which is what the 185 crank does, now does anyone know what the supercharger can take as a max? maybe 16,000rpms? remember I'm only planning to use this "super pulley" for drag racing no street driving lol
here are some possible problems with your idea:
a) you will have ridiculous belt slip
b) you wont have enough fuel for that much boost. you'll need t upgrade the fuel pump and possibly injectors
c) it overboosts the supercharger way beyond the efficiency range (heck, the 185 is already in that area). WAY shorter life as opposed to just a shorter life
d) you will have overboost problems and will need a map clamp or something to resolve this issue
e) tuning for it
why not just machine the pulley down to 62 and then add a little spray to the car for a little more?
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Originally Posted by jturkel
i wouldn't go more
here are some possible problems with your idea:
a) you will have ridiculous belt slip
b) you wont have enough fuel for that much boost. you'll need t upgrade the fuel pump and possibly injectors
c) it overboosts the supercharger way beyond the efficiency range (heck, the 185 is already in that area). WAY shorter life as opposed to just a shorter life
d) you will have overboost problems and will need a map clamp or something to resolve this issue
e) tuning for it
why not just machine the pulley down to 62 and then add a little spray to the car for a little more?
here are some possible problems with your idea:
a) you will have ridiculous belt slip
b) you wont have enough fuel for that much boost. you'll need t upgrade the fuel pump and possibly injectors
c) it overboosts the supercharger way beyond the efficiency range (heck, the 185 is already in that area). WAY shorter life as opposed to just a shorter life
d) you will have overboost problems and will need a map clamp or something to resolve this issue
e) tuning for it
why not just machine the pulley down to 62 and then add a little spray to the car for a little more?
I just wanted to know if the car could take a little more seeing as I'm only going to use it for a few seconds at a time on the track.
I think people have run 191 crank pulleys and/or run a 181 crank with a Code 3 pulley aswell, these combinations would surley be reving the s/c to around 16,000rpms?
I'm only doing this because I have a spare s/c pulley and it will be machined by a proffesional for free, I'm just trying to get the best scenario here. Maybe this will be my easy ticket into the 11s?
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to answer your question, there is a post ,,do a search,, because i am going by memory the sc max is 220000 so to be safe i think it is around 170000,,, at the 22000 you may explode . you also have to remember that you are only running that speed at wot and 6000 rpm. jim
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I'm definatly keeping the groves, I sent it today so I'll see how he goes with it, I decided to get it turned down to 62mm, this will rev the s/c as much as guys that have a 181 crank pulley (15,000rpms) and it should still be big enough so I dont get belt slip. Ive got a belt wrap kit so I'll be okay in that department.
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Originally Posted by kolevski
I've got a C3 pulley at the moment, im not fussed if the original breaks, I just dont want it to break anything else under the hood while its breaking lol
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I would tell him to turn it down no smaller than a diameter which leaves you with at least .060" (60 thousandths) metal thickness (margin). And I would feel better with .090" margin but ask him, as margin is best determined considering metal composition, workpiece design and operating load. My vote is 90 thou. minimum.
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Originally Posted by tunaglove
I ask again, can we turn down the stock pulley and forget the grooves, or will slip become a problem???
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