G/B for Underdrive pulley on CaymanClub

[JP-s-in st. louis]

No never mind just theSC unless the turbos are running on a belt system..... I honestly do not know much about the systm you are running. i would check with your guy first though on that.

Also have you done the plenum yet?

[Gary in BR]

OH Yes, I would check with the turbo supplier first.
I am not into blowing anything up. I sent the shop an email today to see if they make these for the 2.5 and what sort of underdrive the pulley creates.

Ive looked around and can not seem to find the plenum for the 2.5

Do you know of a place that makes them. I dont think RSS is making them for my engine yet.

[blinkwatt]

I'd be skeptical about buying from BBI.

I sent them an email about the compatibility with the 3.2L 986 S and the response was;

Thank you for your interest in our under-drive pulley,

It will work on your 986 boxter great.

I don't want any products in my car that were made by people who don't know how to properly spell my car.

They've had great reviews on the caymanclub forum though.

[JP-s-in st. louis]

You know, the sad part is that we see Boxster spelled incorrectly so many times I almost did not catch it.

[NickCats]

Originally Posted by Gary in BR

OH Yes, I would check with the turbo supplier first.
I am not into blowing anything up. I sent the shop an email today to see if they make these for the 2.5 and what sort of underdrive the pulley creates.

Ive looked around and can not seem to find the plenum for the 2.5

Do you know of a place that makes them. I dont think RSS is making them for my engine yet.

Gary,

Plenum for 2.5 :

http://www.************************************************************/productpage.aspx?pid=110901&cid=11&sid=51

Nick

[Gary in BR]

Thanks,

I will look in to what it can do for my car.

[CJ_Boxster]

Isnt the Crank pulley on the boxster as far as function, the same as other vehicles?

What i mean is usually the Crank Pulley turns belts which we all know, HOWEVER it also is a harmonic balancer for the crank... with my experience with bolt on mods on other vehicles, removing your Crank pulley/Harmonic Balancer will throw off some balance that the crank needs in order to prevent premature bearing failure... and by removing the Stock pulley and installing a lightweight Crank Pulley (which commonly do not have harmonic balancer atributes) can reduce the life of the bearings.


I would recommend performing an oil analysis before and after installing the new lightweight Crank Pulley to check for increased wear in the Crankshaft bearings.

[cheetah]

On many cars the crank pulley is a harmonic balancer also, but not on the Boxster. The stock piece is a very lightweight item, and only used to turn the accessories. My custom-made one has been on my car without any problems, and can be seen here:

http://www.cheetahonline.com/products/n8039.html

This is a 20% reduction, has been tested, and it works great. A noticeable increase in power throughout the powerband. The voltage has been tested with all the accessories on during idle for extended time without any drop in voltage.

This also takes 2/3 the power to turn the pulley, as it was made as lightweight as possible. I have not been able to dyno it yet, but I hope to soon.

Paul

Originally Posted by CJ_Boxster

Isnt the Crank pulley on the boxster as far as function, the same as other vehicles?

What i mean is usually the Crank Pulley turns belts which we all know, HOWEVER it also is a harmonic balancer for the crank... with my experience with bolt on mods on other vehicles, removing your Crank pulley/Harmonic Balancer will throw off some balance that the crank needs in order to prevent premature bearing failure... and by removing the Stock pulley and installing a lightweight Crank Pulley (which commonly do not have harmonic balancer atributes) can reduce the life of the bearings.


I would recommend performing an oil analysis before and after installing the new lightweight Crank Pulley to check for increased wear in the Crankshaft bearings.

[insite]

10 - 15HP at the wheels is BS. Mantis (they race a Cayman S in PCA) has an underdrive pulley that fits all boxsters / caymans at mantissport.ca. they're good for 6HP, but the primary use is to slow the power steering pump slightly so the PS couplings don't melt (a problem on C7's and 987's in particular).

[blinkwatt]

Originally Posted by cheetah

On many cars the crank pulley is a harmonic balancer also, but not on the Boxster. The stock piece is a very lightweight item, and only used to turn the accessories. My custom-made one has been on my car without any problems, and can be seen here:

http://www.cheetahonline.com/products/n8039.html

This is a 20% reduction, has been tested, and it works great. A noticeable increase in power throughout the powerband. The voltage has been tested with all the accessories on during idle for extended time without any drop in voltage.

This also takes 2/3 the power to turn the pulley, as it was made as lightweight as possible. I have not been able to dyno it yet, but I hope to soon.

Paul

How hard was the install? What tools were required? How many miles have you had it installed for now?