G/B for Underdrive pulley on CaymanClub - 986 Forum - The Community for Porsche Boxster & Cayman Owners

jderiansf · 01-11-2008, 01:20 PM

Just passing on what looks to be a decent deal on a bbi underdrive pulley kit on Cayman club.

http://www.caymanclub.net/cayman-chat/18986-bbi-under-drive-pulley-group-buy.html

I have no commercial interest etc. Participate at your own risk etc.

Looks to be for 987 and 996, 997 I'm not sure about 986's

Jason

CJ_Boxster · 01-11-2008, 02:01 PM

I think there site is down, doesnt even come up with just the index page only and no path after ".com"

jderiansf · 01-11-2008, 02:34 PM

the homepage is at caymenclub.net

I just tried the link, and can't get it to go through either. All I did was copy the http.

I'll try again in a little bit.

Jason

jderiansf · 01-11-2008, 03:29 PM

the site is currently down

Jason

Gary in BR · 01-11-2008, 06:08 PM

Do they make a underdrive pulley for the 2.5?

I have never seen one for sale or tested on this engine?
Does anyone know??

If there is one made have you seen a dyno?

jderiansf · 01-11-2008, 08:31 PM

Quote:

Originally Posted by Gary in BR

Do they make a underdrive pulley for the 2.5?

I have never seen one for sale or tested on this engine?
Does anyone know??

If there is one made have you seen a dyno?

Afaik, it will work.

Before the site went down, there was a post about it being available (or compatible) with a 986.

Most h.p. figures were in the 12 to 15 at the wheels. Its underdriven by 16%

The main reason for 987's to change it is to slow down the power steering pump, to avoid overheating the p.s. fluid during extensive track time.

Jason

Gary in BR · 01-11-2008, 09:02 PM

I tried an internet search to find the underdrive pulleys manufactures website but i could not find anything.

Does anyone have a link?

idheaton · 01-12-2008, 08:10 AM

here you go....

http://www.bbiautosport.com/

Gary in BR · 01-12-2008, 08:41 AM

BBI has a nice looking site but I did not see anything about the underdrive pulleys.

I must have in my back up brain.

jderiansf · 01-12-2008, 12:27 PM

Its a new product, and I don't think the site has been updated yet.

Jason

JP-s-in st. louis · 01-14-2008, 07:49 PM

Quote:

Originally Posted by Gary in BR

BBI has a nice looking site but I did not see anything about the underdrive pulleys.

I must have in my back up brain.

Gary....Be Careful! The underdrive pully IIRC will give you more boost and if you are already at 6SI that may put you over the top. I will check with IA on my kit tomorrow

Gary in BR · 01-14-2008, 08:04 PM

The pulley will effect the boost on the turbos??

JP-s-in st. louis · 01-14-2008, 08:08 PM

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 · 01-14-2008, 08:18 PM

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 · 01-14-2008, 08:42 PM

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 · 01-14-2008, 09:03 PM

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

NickCats · 01-15-2008, 10:17 AM

Quote:

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 · 01-15-2008, 10:56 AM

Thanks,

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

CJ_Boxster · 01-15-2008, 11:06 AM

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 · 02-15-2008, 10:03 AM

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

Quote:

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.