Underdrive pully, Jake says its THE bolt-on that regularly makes HP that can be measured, and I put a lot of weight on what he says.

That being said, I have the Techno-torque and like it. I just not had the time, money and energy for an underdrive pully, but its at the top of my to do list,

Ed

:cheers:

Cheapest and most effective bolt on that money can buy!

Please explain what Techno Torque is.

Red,
Techno Torque is a part made by Pedro and it replaces the "T" part of the intake plenum following the throttle body. The interior is modified to reduce turbulence created when incoming air hits the T pipe.

http://www.pedrosgarage.com/Site_2/TechnoTorque.html

my ecu already has powerchip software,
so u don't recommend removing the cats? losing torque is the last thing i wanted to do,

I am not a scientist, nor do I play one on TV . :) Again, however, it was my experience that going "catless" resulted in a significant loss of low end to mid range torque by virtue of the fact that there was hardly any back pressure left in the system. The astute exhaust designer knows that you must balance flow capacity with velocity . In some cases, reducing velocity by means of an exhaust system that is too free flowing can greatly impact low end to mid range torque . This is better explained through the concept of how delta pressure works. I am sure that there is someone on the forum far more versed in this topic than me.

WTF? This is some weird combo of other people's replies and BS.

This person also replied to my thread, "986 Turbo" ? I have no idea who they are, or what they were referring to ???

update:
 

got my car back, installed new water pump, engine mount and LN thermostat,
my car feels like a different car!

highly reccomend the low temp thermo, car runs alot cooler, so i think the ecu runs more aggressive ignition timing.

problem i had was with the underdrive pulley, my mech says its totally wrong for my car, even with shaving down the boss

gonna take it to another guy for a 2nd opinion.

need to know if anyone has fitted the new style BBI pulley see picture

[QUOTE=need to know if anyone has fitted the new style BBI pulley see picture[/QUOTE]

Yes I installed one, works great.. don't know what your guy reffered to other than the fact it's harder to hold when you tighten the bolt and does not have any TDC marks on it. Just keep your old pulley in case you ever need to do cam timing or install the LN eng IMS.

[IMG]smaller.jpg[/IMG]

I am using the BBI pulley on my vehicle with no issues whatsoever. Tell your mechanic that he is far afield on this one .
JD
p.s. Its important to know, that a shorter belt is required to accommodate the smaller pulley.

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.

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.

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.

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?

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

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 .

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.

What do you guys tus of this version of the underdrive pulley?

RSS Under Drive Pulley for Porsche Boxster, Cayman, Carrera, Targa