11-18-2009, 07:06 PM
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#1
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Registered User
Join Date: Jun 2007
Location: Colchester, CT
Posts: 489
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Underdrive pulley recommendations?
I've been wanting to put a new pulley on and wondered if someone can recommend one.
I looked around Flat6 but didn't see anything there. I see a few out there for sale but would prefer a word form someone who has experience with one.
Thanks
Chris
__________________
1999 986 2.5L, Stock Exhaust (S muffler), EVO Intake, 18" Stock rims (17" during winter), IMS Upgrade, 150k+ miles and counting!
87 944S brought back to life
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11-18-2009, 09:01 PM
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#2
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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I am still testing our 4" pulley in real world conditions to see how it effects the operation of the charging, power steering and A/C subsystems. Its the smallest pulley on the market and so far has out performed every other I have tested back to back in the performance category.
I have not added them to our site yet because they haven't proven themselves thoroughly enough as of yet. I hope to have them on line by the beginning of the new year.
I have almost 8K on the test pulley in my 996 and 14K on the unit in the Boxster test car.. I want to see how they perform in cooler weather.
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11-19-2009, 02:56 AM
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#3
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Registered User
Join Date: Jun 2007
Location: Colchester, CT
Posts: 489
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That's a very tiny pulley! How cold does it get in GA? I'm in CT and would be dealing with Zero temps sometimes.
Chris
__________________
1999 986 2.5L, Stock Exhaust (S muffler), EVO Intake, 18" Stock rims (17" during winter), IMS Upgrade, 150k+ miles and counting!
87 944S brought back to life
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11-19-2009, 05:42 AM
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#4
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Registered User
Join Date: Mar 2008
Location: Dallas, TX
Posts: 288
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Dragon
you can go to boxsterspec.com and do a search for under pulleys, a lot of the spec boxster guys are starting to use them. One the members, Chris Amond, has his own design that I put on my car and I have been very happy with it so far
__________________
2001 Boxster S
RUF front bumper, Techart side skirts, Gemballa rear bumper, PSS9s, Cargraphic 18" racing wheels, RUF exhaust, GT3 seats
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11-19-2009, 05:53 AM
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#5
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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I have the RSS UDP. Got it from stuttgartperformance.com Seems to be good.
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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11-19-2009, 07:48 AM
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#6
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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We see single digits here in the dead of winter, BUT the other cold weather data will be gathered by LN Engineering on their Boxster test car that I built the engine for in March of 09. They will certainly see temps well below zero.
In the heat of the summer this pulley did awesome both on the track and the street.
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12-01-2009, 04:35 PM
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#7
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Registered User
Join Date: Aug 2008
Location: DFW
Posts: 46
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This one works pretty good.
Have not had any problems with this 4" pulley.
Chris
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12-01-2009, 05:09 PM
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#8
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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Quote:
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Originally Posted by amondc
Have not had any problems with this 4" pulley.
Chris
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Me either ;-0
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12-03-2009, 07:31 PM
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#9
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Registered User
Join Date: Mar 2008
Location: CA
Posts: 726
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on a 2.7L 5 speed - would insalling this pulley create a noticeable difference in acceleration? would engine rev up faster... even if just a little bit..would it be enough to notice?
given the relatively modest price of a pulley - it might be a worthwhile mod if it didn't hurt anything and could actually make some gains that could really be noticed...
__________________
_____________________________
Cars:
2007 MDX - Wife's mommy mobile
2006 RL - My daily driver
2000 Boxster - Ocean Blue Base 5spd on Black Full leather. 18" wheels and M030.
Boxster mods I've added: Rear speaker kit, Painted Calipers, Painted Bumperettes, Painted Center Console, 987 Shifter Assembly, 3 Spoke Steering Wheel, Clear side markers, 03+ rear lights, de-snorkeled.
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12-04-2009, 05:15 AM
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#10
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Registered User
Join Date: Aug 2008
Location: DFW
Posts: 46
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I guess it depends on how sensitive your butt is. The pulley will add about 10hp.
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12-04-2009, 08:45 AM
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#11
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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So far these pulleys have proven to give me the best improvements in real performance. They bolt on more than an ECU flash or a 3,000.00 exhaust system.
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