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Forced Induction Turbochargers and Superchargers..Got Boost?

Homemade Vortech pulley mod.

Old 05-18-2010, 03:54 PM
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Default Homemade Vortech pulley mod.

$47 and boost went up 1.5psi....WEEEEEE!!!

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Old 05-18-2010, 04:00 PM
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Nice job and looks great.
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Old 05-18-2010, 04:01 PM
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how is it done?
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Old 05-18-2010, 04:04 PM
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Old 05-18-2010, 04:15 PM
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Originally Posted by [email protected] View Post
how is it done?
1) Buy the smallest idler pulley you can find.
2) Loosen belt.
3) Mark where you want the pulley.
4) Drill a hole that goes through the SC plate.
5) Put enough washers to center the pulley over the belt ( I used 4 thin ones).
6) Pass the bolt from one side to the other and use a locking nut.
7) Tighten belt.

That's it.... 15 minutes tops.
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Old 05-18-2010, 04:54 PM
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not uderstanding why ur boost would go up unless u had belt slip before???????
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Old 05-18-2010, 05:11 PM
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Originally Posted by tylerxfire View Post
not uderstanding why ur boost would go up unless u had belt slip before???????
Exactly, and my belt was super tight before.
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Old 05-18-2010, 05:14 PM
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although expensive, I think an ATI or FLuidamper crank pulley is the best way to eliminate belt slip. bigger OD means more belt wrap so you dont have to tension the belts so tight.

but thats a great DIY pulley mod.
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Old 05-18-2010, 06:54 PM
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ford focus runs a 57mm pulley which is just a tiny big larger than gtm pulley.

I have a 60mm pulley from carquest on mine and it works great. Drill a hole, tap, use.

I used a left over spacer from my vortech kit (for another pulley i didn't use) for hte proper backspacing.
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Old 05-18-2010, 07:49 PM
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This was the smallest pulley I could find at autozone, it fit great though so I just bought it without even looking anywhere else...lol.
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Old 05-19-2010, 02:02 AM
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The GTM pulley MOD is a mitsubishi timing belt idler pulley. I purchased one off EBay shipped to my house for $25.00 plus a few bucks for the fasteners.
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Old 05-19-2010, 09:59 AM
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Originally Posted by HotRodG35 View Post
The GTM pulley MOD is a mitsubishi timing belt idler pulley. I purchased one off EBay shipped to my house for $25.00 plus a few bucks for the fasteners.
make model year of that car and all.

the timing tensioner pulley for a 2003 ford focus is pretty small too.
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Old 05-19-2010, 10:33 AM
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Wouldn't something like this work?
Link
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Old 05-19-2010, 10:51 AM
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Originally Posted by iStan View Post
Wouldn't something like this work?
Link
It doesn't say what size it is...I could stay under 3".
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Old 05-19-2010, 11:03 AM
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I've been having trouble with getting sizes. I need to contact Hayden and Goodyear and see if their part numbers can be deciphiered into sizes. I saw a few labeled 76mm, but that is much bigger than I care for.
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Old 05-19-2010, 12:24 PM
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Originally Posted by iStan View Post
I've been having trouble with getting sizes. I need to contact Hayden and Goodyear and see if their part numbers can be deciphiered into sizes. I saw a few labeled 76mm, but that is much bigger than I care for.
Ideally it should be about 60mm or smaller. Mines probably larger, I have yet to measure it though.
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Old 05-19-2010, 12:34 PM
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I'm a jackass. I should have just done a search for a xxmm idler pulley. Here is a 50mm
GATES Part # T42028
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Old 05-19-2010, 12:47 PM
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Hmmm...nice. If mine ever fails I'll get that one...or maybe I'll get it anyways and put it under the larger one...
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Old 01-08-2017, 10:39 PM
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Just a quick bump, I will be doing this on install
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Old 01-09-2017, 07:14 AM
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Could you not have put an spring idler tensioner pulley instead? That way it dynamically tightens and loosens the belt.
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