Power Pulley???

sander288 "Bolt-on Master"

1,404 posts · joined Aug 2008 · 14 Feb 2013, 2:04 pm

#943661

Hi Guys;

Seeing that I've got a weeeee 1300 I wanted to waste as little HP as possible; so was considering getting a power pulley.

I know the EMPI variety all require a sand seal that either machines in or bolts into the front of the case; I don't like the sound of this so was looking at some other pulleys.

The ones below have a steel hub and grooves like the stock pulley. Do these pulleys need a sand seal or any changes to the case? I.e. do they install like a stock crank pulley?

The other cooler option is the 356 pulley (see link to Flat4 Japan... you'll need google translate). I'm not sure how big these pulleys are though

http://www.cbperformance.com/ProductDetails.asp?ProductCode=2020

https://www.flat4.co.jp/products/detail.php?product_id=6995

BMW R65 LS
1967 1300 Deluxe
Swing-axles FTW ❗

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 14 Feb 2013, 2:33 pm

#943664

the sand seal on the empi pulley pushes in......it doesn't need bolts or mods to the case.

bajachris88 The international telephone dialing code for Antarctica is 6

6,661 posts · joined Apr 2005 · 14 Feb 2013, 3:04 pm

#943671

its a sleeve

(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 👍
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta!

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 · 14 Feb 2013, 5:24 pm

#943686

But a sand seal is a weaker pulley. Most aftermarket have incorrect dimensions on the crankshaft ie loose fit that can wreck cranks. Go steel hub JC or Berg IMO

Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

69bug Officially Full-On Dubber

300 posts · joined Jan 2012 · 14 Feb 2013, 6:53 pm

#943694

I've bought a gene berg one,
Could not be happy has made a huge difference to the motor

1969 1500

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 14 Feb 2013, 7:25 pm

#943695

I bought a Berg for the motor I'm building atm......quality is excellent.

sander288 "Bolt-on Master"

1,404 posts · joined Aug 2008 · 14 Feb 2013, 8:52 pm

#943714

Did you guys get the achiever or equalizer pulleys?

BMW R65 LS
1967 1300 Deluxe
Swing-axles FTW ❗

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 14 Feb 2013, 9:07 pm

#943717

I bought this one.

http://www.geneberg.com/product_info.php?cPath=7_3036&products_id=3050

not very good for the street, but should be good for hillclimbs ! 😎 😂

ClockworkMonkey Seriously Crusin Dubber

199 posts · joined Oct 2009 · 14 Feb 2013, 10:39 pm

#943736

What does changing the pulley size actually do? More hp or better response, something like that?

sander288 "Bolt-on Master"

1,404 posts · joined Aug 2008 · 15 Feb 2013, 8:15 am

#943763

It slows down the fan so that when the engine is rev'd your fan is still cooling efficiently; its ideal for motors that sit above 4000rpm most of the time. Your basically not wasting power on turning a fan more than you need to.

Alot of vee guys run their fan belts loose to waster as little hp because their rules don't allow power pulleys.

http://www.geneberg.com/cat.php?cPath=7_229_2836

Had a look at the pulley Craig; seems a little small for a roundy roundy car; the other power pulleys are 5.7in from what I can gather

BMW R65 LS
1967 1300 Deluxe
Swing-axles FTW ❗

69bug Officially Full-On Dubber

300 posts · joined Jan 2012 · 15 Feb 2013, 2:12 pm

#943796

I got the one that is a standard diameter, but balanced.

1969 1500

empi Compulsive Aussie Vee Dubber

4,131 posts · joined Aug 2002 · 15 Feb 2013, 2:40 pm

#943797

why do it to a 1300?

"If at first you don't succeed, skydiving is not for you." - Anonymous 🥷

sander288 "Bolt-on Master"

1,404 posts · joined Aug 2008 · 15 Feb 2013, 4:19 pm

#943803

My 1300 isn't stock 👍

BMW R65 LS
1967 1300 Deluxe
Swing-axles FTW ❗

hellbugged 48's and straight cuts

5,080 posts · joined Apr 2003 · 15 Feb 2013, 4:52 pm

#943807

Power pulley sized achiever for you Sean..... But I would go to dog house cooler if so

I run both achiever on the stocka and equalizer on the hotty.... Both stock size

Don't expect to be able to swap out at the track, they are a tight fit and don't come off without pullers

sander288 "Bolt-on Master"

1,404 posts · joined Aug 2008 · 15 Feb 2013, 5:10 pm

#943810

Thanks for the help fellas

BMW R65 LS
1967 1300 Deluxe
Swing-axles FTW ❗

Gracey Wolfsburg Wizard

511 posts · joined Feb 2003 · 16 Feb 2013, 11:54 am

#943922

I've used a Berg pullley in the past, great quality however super tight fit, as said above you'll need a puller to remover.

I've got a Scat alloy power pulley that I use and it's a good fit, about the same as a std pulley, I got it from Aircooled.net.