Smallest pulley

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sikvibe
Posts: 67
Joined: Tue Feb 23, 2010 11:37 pm

Smallest pulley

Post by sikvibe »

What is the smallest pulley anyone has heard of being used on the trd supercharger for the 1.8L? I'm thinking about having a custom one made out of billet aluminum at the tiny size of 1.4" or 1.2" and then having the idler upsized one inch..just trying to double my boost.
*03 SIKVIBE*Performance mods in order:18x8 Konig illusion rims w/ falken ziex 235/40R18 tires~1.5" lowered TEIN S. tech springs~GM performance parts supercharger~TRD add-on ECU for S/C~Drop in spectre high flow air filter~Tripod center dash oil pres.,egt/boost, a/f guage pod~Homemade .5" custom S/C thermal intake spacer~1.9" aluminum S/C pulley~150 psi>530cc nozzle water/alcohol injection system~2.5" single cat proflow muffler opposite exit install
midnighthunder89
Posts: 178
Joined: Tue Sep 01, 2009 11:00 am

Post by midnighthunder89 »

I am not sure put the higher stages of the cobalt ss has a 2.5"
2010 Vibe 2.4L 5 speed manual.
sikvibe
Posts: 67
Joined: Tue Feb 23, 2010 11:37 pm

Post by sikvibe »

Yeah, the trd supercharger comes with the 2.4" I looked around and the smallest I could find was 2.0, but I'm looking to at least double the boost, so I'm not sure if that would do it..anybody have experience with this?
*03 SIKVIBE*Performance mods in order:18x8 Konig illusion rims w/ falken ziex 235/40R18 tires~1.5" lowered TEIN S. tech springs~GM performance parts supercharger~TRD add-on ECU for S/C~Drop in spectre high flow air filter~Tripod center dash oil pres.,egt/boost, a/f guage pod~Homemade .5" custom S/C thermal intake spacer~1.9" aluminum S/C pulley~150 psi>530cc nozzle water/alcohol injection system~2.5" single cat proflow muffler opposite exit install
djkeev
Posts: 1357
Joined: Sat Mar 14, 2009 8:51 pm

Re: Smallest pulley (sikvibe)

Post by djkeev »

Hmmm,My question would be at what RPM's does the thing explode?Everything is designed to work in a given situation thus there are limits to what it can do. If you over rev it, it can come flying apart.find out before you go modifying too much.Dave
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DiveNut
Posts: 382
Joined: Tue Apr 06, 2004 5:53 am

Re: Smallest pulley (djkeev)

Post by DiveNut »

Quote, originally posted by djkeev »Hmmm,My question would be at what RPM's does the thing explode?Everything is designed to work in a given situation thus there are limits to what it can do. If you over rev it, it can come flying apart.find out before you go modifying too much.DaveTrue, the smallest I recall seeing is 2.1" (Water injection is a must). At some point after that you get diminishing returns. The blowers have max RPM...heat buildup will also negate gains. There is a detailed thread, it think in MO in which a member breaks down a lot of the pulley size questions.
Bare Bones Base, Abyss 2004 Vibe, Debadged, Auto, ABS, GM Performance Supercharger, Injen CAI, 2.3" URD Pulley, Unichip,Tru-Cool Tranny Cooler SOLD
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sikvibe
Posts: 67
Joined: Tue Feb 23, 2010 11:37 pm

Post by sikvibe »

Cool, thanks, I will check there...
*03 SIKVIBE*Performance mods in order:18x8 Konig illusion rims w/ falken ziex 235/40R18 tires~1.5" lowered TEIN S. tech springs~GM performance parts supercharger~TRD add-on ECU for S/C~Drop in spectre high flow air filter~Tripod center dash oil pres.,egt/boost, a/f guage pod~Homemade .5" custom S/C thermal intake spacer~1.9" aluminum S/C pulley~150 psi>530cc nozzle water/alcohol injection system~2.5" single cat proflow muffler opposite exit install
-x-
Posts: 2
Joined: Fri Apr 02, 2010 9:44 pm

Post by -x- »

you can go to about 2.1, with a good water/meth cooling system...after that you're just gonna overspin your blades...and over heat em...
Man I'm gona miss my Boost...
sikvibe
Posts: 67
Joined: Tue Feb 23, 2010 11:37 pm

Post by sikvibe »

Yeah The guys over at the MO site say there getting about 9psi of slowness with a 1.9" pulley. I found one at pulley boys for $75 The only problem is they won't respond to my emails..I also read in tuner mag this month that 13 psi is the holly grail that everyone agrees on for max boost on a stock engine, also learned the mazda speed boosted motors are exactly the same ones used in there na cars.
*03 SIKVIBE*Performance mods in order:18x8 Konig illusion rims w/ falken ziex 235/40R18 tires~1.5" lowered TEIN S. tech springs~GM performance parts supercharger~TRD add-on ECU for S/C~Drop in spectre high flow air filter~Tripod center dash oil pres.,egt/boost, a/f guage pod~Homemade .5" custom S/C thermal intake spacer~1.9" aluminum S/C pulley~150 psi>530cc nozzle water/alcohol injection system~2.5" single cat proflow muffler opposite exit install
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