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Cayman Dyno ChartsThis is the forum to post your dyno charts showing the results of various performance modifications.
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That's a very worthwhile gain! How hard was the installation? Did you do it yourself? Were any special tools involved? How is this underdrive pulley different from the one supplied by Mantis?
That's a very worthwhile gain! How hard was the installation? Did you do it yourself? Were any special tools involved? How is this underdrive pulley different from the one supplied by Mantis?
Thanks for the posting!
I had BBI install mine, but I know someone who has installed their own pulley. It needs a special tool that is included as well as the crank pulley bolt for about $250. Keeps the power-steering cooler and ads some HP.
__________________
DISCLAIMER: I'm not an engineer, I just play one on the internet.
BBI Under-Drive Pulley | BBI Roll-Bar
BBI Brake cooling package | GT3 Lower control arms
GT3 Front Sway bar | Tarett Rear Sway bar
Tarett Drop links Front & Rear | Tarett Rear Toe arms
Quaife TBD | Nitto NT-01s | PASM Springs
Anybody have the tools for the underdrive install?
I think I'm gonna do the underdrive next. Now that some before/after dyno data has been posted, this seems like a good value in terms of $/HP, plus it eliminates the power steering problems reported by some trackers. I could save some $ if anybody has a pulley tool that I could borrow. And although I have a 32mm socket left over from my 911 days, I don't relish the hassle of grinding it down so it'll fit in the small space avaialable for the pulley nut. So does anybody have a ground-down 32mm socket I could borrow, and a pulley tool as well? I'm in Northern California and could pick-up and deliver, or I'd pay shipping otherwise.
Oh yes CCC4321 this is on my to-do list. There isn’t a better shop to have it installed at either; our zone 8 is a lucky zone for sure. Luckily others can also acquire his Under-Drive Pulley also directly from BBI (soon to be a sponsor!).
Oh yes CCC4321 this is on my to-do list. There isn’t a better shop to have it installed at either; our zone 8 is a lucky zone for sure. Luckily others can also acquire his Under-Drive Pulley also directly from BBI (soon to be a sponsor!).
zornet
Hey Z,
What are you waiting for? get it done. I had my installed from BBI last month. It is relatively cheap for the HP gain. You better get it done by the summer time if you are planning to track frequently.
I really can't read these. Can you render a simple explanation?
ThnaX!
__________________
Transplant from Alaska => Arizona. I like it HOT!
Don'tmiss scraping my master's windshield, winter oil, winter tires, chains, pluggin' in the car over night--block water heater! and interior warmer. And having to put anti-freeze in my GAS!
I really can't read these. Can you render a simple explanation?
ThnaX!
The under-drive pulley, under drives the accessories ( AC, Power steering , Alternator...) which in turn frees up HP/Torque. The original idea was to help the Power Steering from overheating malfunctioning by slowing down the pump, which has happened to many Caymans that have done DEs and AXs.
__________________
DISCLAIMER: I'm not an engineer, I just play one on the internet.
BBI Under-Drive Pulley | BBI Roll-Bar
BBI Brake cooling package | GT3 Lower control arms
GT3 Front Sway bar | Tarett Rear Sway bar
Tarett Drop links Front & Rear | Tarett Rear Toe arms
Quaife TBD | Nitto NT-01s | PASM Springs
Have you tried seeing if your alternator can keep up? Fire up the HID's and crank up your BOSE system and turn on your windshield wipers, fogs, and interior lights. Any flickering?
Have you tried seeing if your alternator can keep up? Fire up the HID's and crank up your BOSE system and turn on your windshield wipers, fogs, and interior lights. Any flickering?
Please let us know how much your lights dim, you wipers' speed slows and other possible untoward effects on your alternator!
Thank you in Advance
__________________
Transplant from Alaska => Arizona. I like it HOT!
Don'tmiss scraping my master's windshield, winter oil, winter tires, chains, pluggin' in the car over night--block water heater! and interior warmer. And having to put anti-freeze in my GAS!
There is no flickering or dimming at all. I have been in the rain at night and there were no problems. I have used under-drive pulleys in the past on other cars as well with no issues. Hondas and Acuras
__________________
DISCLAIMER: I'm not an engineer, I just play one on the internet.
BBI Under-Drive Pulley | BBI Roll-Bar
BBI Brake cooling package | GT3 Lower control arms
GT3 Front Sway bar | Tarett Rear Sway bar
Tarett Drop links Front & Rear | Tarett Rear Toe arms
Quaife TBD | Nitto NT-01s | PASM Springs
Have you tried seeing if your alternator can keep up? Fire up the HID's and crank up your BOSE system and turn on your windshield wipers, fogs, and interior lights. Any flickering?
For the Ride of Your Life: Drive the Alcan! 
G@@D QUESTION! Please Try & Reply!
