Which under drive pulley to buy/use?

[Bigsmoothlee]

To the guy holding the temp gun directly at the vent and testing the AC at 70 degrees....

This test is a fail for several reasons.

#1. Holding the temp gun right in the stream of the cold AC makes the reading artificially lower.

#2. Its 70 degs, but what was the humidity?

#3. When its really hot at stop lights, I sometimes rev the engine to 1200 rpm to get some better AC.

Please revise your experiment and show us a AC manifold hooked up and before and after pic with the pressures.:dance:

[jb92563]

Originally Posted by Bigsmoothlee

To the guy holding the temp gun directly at the vent and testing the AC at 70 degrees....

This test is a fail for several reasons.

#1. Holding the temp gun right in the stream of the cold AC makes the reading artificially lower.

#2. Its 70 degs, but what was the humidity?

#3. When its really hot at stop lights, I sometimes rev the engine to 1200 rpm to get some better AC.

Please revise your experiment and show us a AC manifold hooked up and before and after pic with the pressures.:dance:

Really!!!!

OK, here is the new result:

[Bigsmoothlee]

Originally Posted by jb92563

Really!!!!

OK, here is the new result:

Well, either way, it isnt going to stop me from installing an underdrive pulley. Did you get any noticeable gains in power?

[jb92563]

Originally Posted by Bigsmoothlee

Well, either way, it isnt going to stop me from installing an underdrive pulley. Did you get any noticeable gains in power?

I think Raby documented a gain of 5 HP when he tested his own cars.

I do feel the noticable increased torque at the lower to mid range.
Couple this with my 2nd cat delete which improved throttle response quite a bit and I now have acceleration from a dead stop that you actually have to manage a bit more to keep traction under control. Plus I have an "S" so its doubly awesome.

Very worthwhile, you wont regret it.

If I only had $700 to do mods then the first would be the 2nd cat delete and after market dual mufflers and the 2nd would be the Under Drive pulley.

[sgt brad]

Originally Posted by jb92563

Really!!!!

OK, here is the new result:

Very funny. Best rebuttal I have seen in ages. Thanks for the laugh.

[Bigsmoothlee]

Originally Posted by sgt brad

Very funny. Best rebuttal I have seen in ages. Thanks for the laugh.

Just trying to educate the kids in the sandbox on how to use a temp gun!

[Lobo1186]

I have the Precision chassis works UDP for about three years now on a daily driver, only issue is a slight skip in audio sometimes at low RPM.

[Porsche9]

Originally Posted by Lobo1186

I have the Precision chassis works UDP for about three years now on a daily driver, only issue is a slight skip in audio sometimes at low RPM.

I actually have this same issue. It's happens more frequently when the headlights are on. Otherwise no problems including one 99 degree day last Friday. A/C had no problems cooling the cabin quickly and the coolant temp stayed right on the number 8.

[kcpaz]

I have more of those pulleys available. They are being anodized black now and come with a new OEM bolt. I have 10 more left.