got my afm mr freeze boost cooler kit in and pured in 50/50 methanol/distilled water. it make take advantage of the cooler intake charge i took off my 3" pulley and put on a 2.75" i used to get 9psi of boost no i get 4psi. what the hell happened? i also lost hp. i can see the hp loss because im not done tuning, probably have to have the dyno tuner do it cause i have the fp set at 42psi getting a 10.5:1 afr which is close to what my tuner set the afr to when i ran the 3" pulley so afr hasnt changed much but i lost boost and power.(he had it set to 10:1 for some conservative reason) the belt is tight and i dont hear any slipping. why did i loose boost with a smaller pulley?
put on a smaller sc pulley and now i make less boost?
- Thread starter luckythirteen13
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speadfreak
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- Oct 13, 2005
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probably a stupid question, but have you checked for leaks between the sc and throttle body? It's the only explaination I can think of. It doesn't take much of a leak to loose that amount of boost.
im checked all the clamps, all are tight.
Rick 91GT, i dont see any belt powder and i dont hear any slipping. and if it was slipping it would have to be slipping like crazy to get that low of a boost (4psi with a pulley that should get 12). yes i am spraying the mr. freeze. should i try disconnecting it and going from there?
i have a longer belt which would cause the belt to rap further around the sc pulley.....should i try putting that one on?
Rick 91GT, i dont see any belt powder and i dont hear any slipping. and if it was slipping it would have to be slipping like crazy to get that low of a boost (4psi with a pulley that should get 12). yes i am spraying the mr. freeze. should i try disconnecting it and going from there?
i have a longer belt which would cause the belt to rap further around the sc pulley.....should i try putting that one on?
I would see what it does with out the Mr.Freeze kit, maybe it is getting to much methonal/water that will kill power.
Just remember to listen for detonation so you do not hurt anything.
What blower do you have? You can actually get to the point you are spinning the blower so hard it is less efficent and will make less boost. I have delt with that on a 2.75" pulley on a A-trim when using a 8" crank pulley.
If you are not seeing dust it most likely isn't slipping.
Just remember to listen for detonation so you do not hurt anything.
What blower do you have? You can actually get to the point you are spinning the blower so hard it is less efficent and will make less boost. I have delt with that on a 2.75" pulley on a A-trim when using a 8" crank pulley.
If you are not seeing dust it most likely isn't slipping.
ok just went to the gas station....that was an excuse to go for a drive. i tried flooring it. uggh the belt IS squeeling. horribly! sounds like a pig being led to slauter. and when i got home i could smell burning rubber. i have a longer belt (the belt i used for my 3" pulley) i know it fits with the 2.75" pulley ive already tried. if i run the longer belt the center of the belt (the space between the 2 pulleys) will be pushed in further. the longer belt will cause the belt to almost touch itself in the middle as it goes around the tensioner but it doesnt touch and this would get me maybe .25" more surface coverage around the sc pulley. you think that will help? does what i just said make any sense?
what else can i do, i cant afford a 10 rib pulley set
i plan to go to the dyno tuner in about 2 weeks. grand opening of a new one offering 3 pulls for $45. i have to find out if they can do anything with the custom chip i already have though.
what else can i do, i cant afford a 10 rib pulley set
i plan to go to the dyno tuner in about 2 weeks. grand opening of a new one offering 3 pulls for $45. i have to find out if they can do anything with the custom chip i already have though.
Well what I find I have to do on Vortech set-ups is re-drill the hole that the factory tensioner pin sticks in so you can get the belt away from the water pump pulley and get proper tension on the accessory belt.
If the blower belt is that close to touching you may need a shorter belt, I also like the aftermarkt billet tensioner jack screw set-ups.
If the blower belt is that close to touching you may need a shorter belt, I also like the aftermarkt billet tensioner jack screw set-ups.
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