No power gain from Underdrive Pulley?...

		986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions
No power gain from Underdrive Pulley?...

Garage

LinkBack

Thread Tools

Display Modes

Boxtaboy No power gain from Underdrive... 01-18-2017, 10:15 AM

NewArt When I installed a UDP, it... 01-18-2017, 10:30 AM

WorkInProgressK Correct. Pumps cavitate (the... 01-18-2017, 11:00 AM

Boxtaboy I don't doubt that statement.... 01-18-2017, 10:50 AM

Nine8Six VJ should have included a... 01-18-2017, 10:50 AM

thstone +1 ^^^^ The dyno baseline... 01-18-2017, 01:52 PM

WorkInProgressK Considering the difficulty of... 01-18-2017, 02:46 PM

Boxtaboy I think he says in the video... 01-18-2017, 10:53 AM

Nine8Six oh did he. missed it 01-18-2017, 10:55 AM

steved0x * Torque the bolt to 50 NM... 01-18-2017, 11:46 AM

heliguy I don't wanna believe this. :( 01-18-2017, 01:23 PM

steved0x Me neither... Maybe... 01-18-2017, 02:12 PM

heliguy Agreed. I thought I could... 01-18-2017, 03:48 PM

Boxtaboy Any truth to some comments in... 01-19-2017, 03:01 AM

Quadcammer not on the 986. Its a simple... 01-19-2017, 04:08 AM

Gilles On my 987 the OEM pulley did... 01-19-2017, 07:01 AM

Porsche9 My UDP has been on my car for... 01-19-2017, 08:25 AM

Topless Wow, 273.8 RWHP sounds like a... 01-19-2017, 09:15 AM

Gilles I am sorry but forgot to... 01-19-2017, 10:22 AM

jaykay -parasitic engine torque load... 01-21-2017, 12:26 PM

Nine8Six Can't personally confirm this... 01-19-2017, 03:16 AM

Boxtaboy Hmmmm...interesting. Anyone... 01-19-2017, 03:35 AM

edc It's not wheel horsepower.... 01-19-2017, 06:09 AM

tommy583 Wouldn't you want to compare... 01-19-2017, 06:49 AM

heliguy Good point. 01-19-2017, 06:56 AM

Timco I have absolutely no doubt it... 01-19-2017, 06:50 AM

particlewave Placebo effect. ;) I see... 01-19-2017, 09:23 AM

The Radium King less rotating mass (lighter... 01-19-2017, 09:41 AM

particlewave Inertia. The difference in... 01-19-2017, 10:05 AM

jcslocum A lighter flywheel will add... 01-22-2017, 03:45 AM

Anker Getting 10HP from an... 01-19-2017, 10:22 AM

Boxtaboy Hey, it proved the mod gained... 01-19-2017, 10:33 AM

edc I've done this mod twice now... 01-19-2017, 10:35 AM

Boxtaboy So you're saying it's worth... 01-19-2017, 10:37 AM

edc I've never thought it would... 01-19-2017, 10:57 AM

edc The mod is cheap if you know... 01-19-2017, 10:58 AM

heliguy So what would an ECU flash... 01-19-2017, 02:10 PM

JFP in PA Not a lot. 01-19-2017, 02:20 PM

edc I dyno'd about 6 bhp from a... 01-19-2017, 03:35 PM

Anker The underdrive pulley reduces... 01-19-2017, 02:39 PM

j.fro Are we talking 4" or 5"... 01-19-2017, 03:19 PM

Steve Tinker I think there is some... 01-19-2017, 03:30 PM

Gelbster Makes perfect sense. 01-21-2017, 09:42 AM

itsnotanova I wish Jake Raby was still... 01-21-2017, 10:25 AM

Porsche9 Did I miss something? 01-21-2017, 08:42 PM

More replies below current depth...

rfuerst911sc I have a few comments to ad ,... 01-22-2017, 07:22 AM

Lapister That UK guys video on his... 01-21-2017, 07:55 PM

heliguy Has anyone seen this on... 01-22-2017, 04:38 AM

Nine8Six Blk on white bud:... 01-22-2017, 04:53 AM

BrokenLinkage Wait a minute. This forum,... 01-22-2017, 06:27 AM

Gelbster This Thread is a perfect... 01-22-2017, 09:04 AM

10/10ths Can't we all just get along? 01-22-2017, 09:42 AM

heliguy http://986forum.com/forums/upl... 01-22-2017, 06:43 AM

edc Looks just like the usual... 01-22-2017, 06:50 AM

Gelbster Agreed. The Jake-baiters won.... 01-22-2017, 09:58 AM

BrokenLinkage Jake- thank you, both for... 01-22-2017, 10:31 AM

Gelbster Yes, because it is a... 01-22-2017, 12:14 PM

njbray Sad that Jake Baby will no... 01-22-2017, 06:08 PM

WorkInProgressK Where is the nut? Then it's... 01-22-2017, 06:29 PM

JFP in PA Re read what the quote says;... 01-23-2017, 02:00 AM

01-19-2017, 10:57 AM

#14

edc

550 Anniversary

Join Date: Jul 2012

Location: Surrey, UK

Posts: 747

Garage

I've never thought it would make any significant power so have never bothered to dyno the mod. That's saying something as my 2 Boxsters have probably been on the dyno about 8 times between them measuring the mod difference.

__________________
Current: 550 Spyder Anniversary- Carnewal exhaust - 100 cell cats - stainless manifolds - 4" underdrive pulley - poly gearbox mounts - rear lower alu brace - adjustable rear toe links
Sold: 986S - Zenith Blue - 18" Sport Classics - Black Zunsport grilles - Stainless silencer and manifolds - K&N panel - shortshift - M030 suspension - 75mm throttle body - custom 83mm intake - SmartTop - custom remap - MDS underdrive pulley

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is On Trackbacks are On Pingbacks are On Refbacks are On Forum Rules

All times are GMT -8. The time now is 07:19 PM.