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Power Pulley???
sander288 - February 14th, 2013 at 02:04 PM

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://jayceevw.com/yahoo_site_admin/assets/images/power_pulley.244132939_std.JPG

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

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

Craig Torrens - February 14th, 2013 at 02:33 PM

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

bajachris88 - February 14th, 2013 at 03:04 PM

its a sleeve

matberry - February 14th, 2013 at 05:24 PM

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

69bug - February 14th, 2013 at 06:53 PM

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

Craig Torrens - February 14th, 2013 at 07:25 PM

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

sander288 - February 14th, 2013 at 08:52 PM

Did you guys get the achiever or equalizer pulleys?

Craig Torrens - February 14th, 2013 at 09:07 PM

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 ! :cool: :lol:

ClockworkMonkey - February 14th, 2013 at 10:39 PM

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

sander288 - February 15th, 2013 at 08:15 AM

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

69bug - February 15th, 2013 at 02:12 PM

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

empi - February 15th, 2013 at 02:40 PM

why do it to a 1300?

sander288 - February 15th, 2013 at 04:19 PM

My 1300 isn't stock :yes:

hellbugged - February 15th, 2013 at 04:52 PM

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 - February 15th, 2013 at 05:10 PM

Thanks for the help fellas

Gracey - February 16th, 2013 at 11:54 AM

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.