TechnoTorque or Underdrive Pulley

[Johnny Danger]

Originally Posted by dsisco

Thanks guys for the feedback,

My water pump has just blown so looks like ill be doing the pulley while im in there.

will order from Tarret engineering or flat 6,

any reccomendations? or are they all pretty much the same?

will let you know how it goes

thanks

I installed the BBI on my vehicle about a year ago . At the time, it was considered the lightest and best designed pulley of the lot. However, Jake at Flat 6 has since come out with his own which I'm sure is excellent also.

[dsisco]

ended up going with the newest design from BB1 from tarrett engineering,

will be installing over the weekend along with my engine mount, water pump and LN thermostat,

will let you know how it goes.

ps. is there any gains to be had from removing the cats on a 2.5?

thanks

[JAAY]

8hp. and a check engine.. Fabspeed makes some sweet bypass pipes.. That is what I am running.

[Mark_T]

"ended up going with the newest design from BB1 from tarrett engineering"


Are you changing to a shorter belt as well, or were you going to see if the oem belt works? Any trouble with grinding down the boss that apparently is in the way?

Be nice to see some pics!

Mark

[dsisco]

Originally Posted by JAAY

8hp. and a check engine.. Fabspeed makes some sweet bypass pipes.. That is what I am running.

how do you get rid of the check engine light?

[Johnny Danger]

Originally Posted by dsisco

how do you get rid of the check engine light?

To clear the CEL, you would have to reprogram the ecu in order for it to disregard the fact that the cats have been deleted. In my experience, going "catless" resulted in a significant loss of low end and mid range torque. Since the 2.5 engine only has one set of cats, you would be better off upgrading to a set of high quality lower cell units. This, however, can be an expen$$$$ive .

[JAAY]

Probably true on the 2.5. I have a 3.4 so in my case it is different.

[edevlin]

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

[dsisco]

Originally Posted by Johnny Danger

To clear the CEL, you would have to reprogram the ecu in order for it to disregard the fact that the cats have been deleted. In my experiencing, going "catless" resulted in a significant loss of low end and mid range torque. Since the 2.5 engine only has one set of cats, you would be better off upgrading to a set of high quality lower cell units. This, however, can be an expen$$$$ive .

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

[Johnny Danger]

Originally Posted by dsisco

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.

[JTP]

Originally Posted by ronoroa.zoro8

Techno pair is a piece of Peter, which replaces the T after the throttle body intake plenum. The interior has been modified to reduce the turbulence created when the incoming air reaches the pipe T. The 2.5L engine has a unique set of cats, it is better to get a set of high quality units lower than the cell.

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