TechnoTorque or Underdrive Pulley

[BudmanV24]

Has anyone noticed higher operating temperatures due to under-driving the water pump too? Or does the decreased load from spinning the other components at a slower speed make up for that? I don't think I've seen anyone discuss this.

[Keith Newby]

I think previous posts stated that there was no increase in engine temp. attributed to the under drive pulley. Of greater interest to me was the mention of a power steering under drive pulley on the market. I may be wrong but I would think the power steering pump takes more power to run than the water pump...and as a person who would never grind away an engine boss, the more elegant steering bolt -on strikes a chord.

[Topless]

Originally Posted by BudmanV24

Has anyone noticed higher operating temperatures due to under-driving the water pump too? Or does the decreased load from spinning the other components at a slower speed make up for that? I don't think I've seen anyone discuss this.

Tests by Flat6 indicate that engine temps run lower with the UD pulley. I don't know if it is due to impeller cavitation at higher RPM with stock pulley, or just a better heat transfer flow match.

[ProjectM96]

Is this TechnoTorque product from Pedrosgarage safe to buy? What I mean is that the website looks fishy. No security in http(should be https) And he wants us to send him an email with all of our credit card info. I want the product but I don't feel safe buying it that way.

Any opinions?

Also, earlier in this thread someone mentioned getting the CEL from the fabspeed exhaust and secondary cat-bypass pipes. I emailed fabspeed and they insist that their bypass pipes and exhaust systems do not activate the CEL and that I should pass emissions testing with no problems.
Is everyone who installed the bypass pipes getting the CEL light?

[ddb]

Hi ProjectM96,

I ordered a TT2 from Pedro a couple of years ago without any issues. In fact, he sent me the TT2 and I mailed him a check later. He is a great guy and asset to the Boxster community. I don't think he has the https because there aren't credit card transactions on his site. At least not when I was on there the last time.

I don't have any experience with the Fabspeed system, but installed a complete system from another company without any CEL problems. I don't think installing secondary cat delete pipes and a muffler on a 2000 or newer will cause a CEL issue. If you install headers without the needed cats you will have an issue.

Best of luck,

ddb

[Johnny Danger]

Originally Posted by ProjectM96

Is this TechnoTorque product from Pedrosgarage safe to buy? What I mean is that the website looks fishy. No security in http(should be https) And he wants us to send him an email with all of our credit card info. I want the product but I don't feel safe buying it that way.

Any opinions?

Also, earlier in this thread someone mentioned getting the CEL from the fabspeed exhaust and secondary cat-bypass pipes. I emailed fabspeed and they insist that their bypass pipes and exhaust systems do not activate the CEL and that I should pass emissions testing with no problems.
Is everyone who installed the bypass pipes getting the CEL light?

Deleting the secondary cats will not cause a CEL. Also, Pedro has a very laid back and honest way of doing business . I purchased a TT2 from him a couple of years ago as well . And, like ddb he told me to simply mail him a check . No worries with Pedro . There should be more like him in the Porsche world .

[stateofidleness]

at the risk of sounding like the village idiot, can someone explain what an underdrive pulley does exactly? Do you lose/gain functionality of any other systems (AC, etc), and what is all involved with the installation?

-Village Idiot

[Johnny Danger]

Originally Posted by stateofidleness

at the risk of sounding like the village idiot, can someone explain what an underdrive pulley does exactly? Do you lose/gain functionality of any other systems (AC, etc), and what is all involved with the installation?

-Village Idiot

In layman's terms, by reducing rotational mass and under driving the vehicle's "accessories", the lighter weight pulley draws less power from the engine . No functionality is lost. However, some have reported that under extreme conditions when all of the vehicle's accessories (i.e. a/c , headlights, radio, wipers ect..) are being used at the same time, rpm's may fluctuate at idle . As far as installation is concerned, it's chicken scratch at first. However, once someone has done one - it's a breeze.