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-   -   Installed the raby under-drive pulley (http://986forum.com/forums/showthread.php?t=23645)

jhandy 02-11-2010 08:41 PM

Installed the raby under-drive pulley
 
I was avoiding this mod because i did not feel like messing with the trimming of the case.
Then I saw a commerical for the dremel multi-max. It is a flush cutting tool.

I got the pulley and belt from Jake, The nut from dealer, Incedently you can not get a new thrust washer. Has to be ordered from germany and for some reason hard to get.

Anyway. the dremel thing sliced throught the caseing like butter, took less than 1 min.

Total install- @45 mins.

Drove it and I am very impressed, there is a very noticeable increase in power. More than I have got from any other bolt on.

Alt voltage holding at 14.3volts.

I vote this the best mod ever!!

Jake Raby 02-12-2010 03:28 AM

Time and time again this install gives us the largest net power increase of any other bolt on.. I've installed a 3,000 dollar muffler and set of headers in the past and haven't gained as much power as this pulley provides.

Glad install went smoothly. The Dremel is the tool for this job when doing the work in-car.

syncspeed 02-12-2010 03:46 AM

Great, could you provide any tips on what you used to hold the stock pulley in place in order to break the bolt free?

Jake Raby 02-12-2010 04:57 AM

a 5/16" (or 8mm) steel dowel inserted through the crank pulley and into the crankcase locking boss does the trick just fine.
I am putting together a kit that includes this improvised tool for the job.

eclou 02-12-2010 05:48 AM

any idea if this is less detrimental to the crank harmonics than a ltw flywheel? There have been speculations that there are increased IMS and RMS failures in BSR's with ltw flywheels. This might also help avoid power steering fluid overheating

JFP in PA 02-12-2010 06:30 AM

Quote:

Originally Posted by Jake Raby
a 5/16" (or 8mm) steel dowel inserted through the crank pulley and into the crankcase locking boss does the trick just fine.
I am putting together a kit that includes this improvised tool for the job.

Jake, a quick question: Are you cutting away the boss used to hold the OEM pulley; and if so, how do you hold the new one or lock the engine position for service once the original boss is cut away?

root_werks 02-12-2010 07:07 AM

Seems like a good mod to me.

Jake Raby 02-12-2010 07:12 AM

Quote:

Originally Posted by JFP in PA
Jake, a quick question: Are you cutting away the boss used to hold the OEM pulley; and if so, how do you hold the new one or lock the engine position for service once the original boss is cut away?

This mod can't be compared to the LWFW. The LWFW won't add steady state tested HP because it only reduces mass. The UD pulley increases HP by slowing down the accessories of the engine.

JFP, the boss extends into the case, so after removing the 12mm necessary for clearance enough of the boss remains to be useful during cam timing and engine maintenance.

JFP in PA 02-12-2010 07:46 AM

Quote:

Originally Posted by Jake Raby
JFP, the boss extends into the case, so after removing the 12mm necessary for clearance enough of the boss remains to be useful during cam timing and engine maintenance.

Thanks Jake, I've been wondering about that and some customers have been asking about your pulley................

jhandy 02-12-2010 07:57 AM

There really is no tips for this. I used a large Allen wrech with the car
in gear to stop the pulley. There are holes in both pulleys. I would think
there is a special tool like the one for the screw on oil filter adapter that
could be used. But not needed. You need a 15/16 large socket and a breaker
bar. Same size used to lever the belt tentioner. Don't loose the washer.
New bolt is 9$. Tighten to 192 ftlbs.
I did worry about turning the crank too far in either direction as not
to turn motor backwards. I don't know if it matters or not.
This is too simple not to do.

I think the multi tool cutter made this go so fast. Otherwise
cutting the boss looks like a pain in the rear.

Allen K. Littlefield 02-12-2010 08:53 AM

torgue increase?
 
[QUOTE=Jake Raby]Time and time again this install gives us the largest net power increase of any other bolt on.. I've installed a 3,000 dollar muffler and set of headers in the past and haven't gained as much power as this pulley provides.

Jake, what was the torque increase after installing the pulley? Thanks for your work on these engines.

AKL :cheers:

Boxtaboy 02-12-2010 11:08 AM

What kinda hp gain are we talking about here? 5 or 10hp? I ask because if only 5 or less, then it would not be worth the hassle to me, but if something like 10hp gain, then I'd consider it.

Jake Raby 02-12-2010 11:42 AM

Despite any actual values, this mod is one of the few that can be felt in the driver's seat.
I see 5-7 HP at the wheels and a torque increase of generally 5 lb/ft after the installation on my dyno. What should be more considered is this mod creates more power across the ENTIRE RPM range, so the average HP is increased and thats a much bigger gain on a stop watch or in the driver's seat than just a peak HP gain.

Boxtaboy 02-12-2010 11:44 AM

Quote:

Originally Posted by Jake Raby
Despite any actual values, this mod is one of the few that can be felt in the driver's seat.
I see 5-7 HP at the wheels and a torque increase of generally 5 lb/ft after the installation on my dyno. What should be more considered is this mod creates more power across the ENTIRE RPM range, so the average HP is increased and thats a much bigger gain on a stop watch or in the driver's seat than just a peak HP gain.

Great. Thx for the reply Jake.

Topless 02-12-2010 12:20 PM

Quote:

Originally Posted by Jake Raby
Despite any actual values, this mod is one of the few that can be felt in the driver's seat.
I see 5-7 HP at the wheels and a torque increase of generally 5 lb/ft after the installation on my dyno. What should be more considered is this mod creates more power across the ENTIRE RPM range, so the average HP is increased and thats a much bigger gain on a stop watch or in the driver's seat than just a peak HP gain.

This really is the key here. An increase of 5rwhp from 3000-6500 rpm is a lot more valuable than a gain of 5hp only from 6500-7000 rpm in terms of lap times. How much time do we really spend above 6500 rpm? Far more useful than the average software reflash at 1/5 the cost. I did it as a reliability mod to preserve my power steering pump on track days but the bit-o-power increase is icing on the cake. :D

blue2000s 02-12-2010 12:42 PM

Quote:

Originally Posted by Jake Raby
Despite any actual values, this mod is one of the few that can be felt in the driver's seat.
I see 5-7 HP at the wheels and a torque increase of generally 5 lb/ft after the installation on my dyno. What should be more considered is this mod creates more power across the ENTIRE RPM range, so the average HP is increased and thats a much bigger gain on a stop watch or in the driver's seat than just a peak HP gain.

It should be decreasing the pumping losses exponentially as RPMs increase. At lower RPM, the gains are much less than at higher RPM.

JFP in PA 02-12-2010 01:32 PM

Quote:

Originally Posted by Jake Raby
Despite any actual values, this mod is one of the few that can be felt in the driver's seat.
I see 5-7 HP at the wheels and a torque increase of generally 5 lb/ft after the installation on my dyno. What should be more considered is this mod creates more power across the ENTIRE RPM range, so the average HP is increased and thats a much bigger gain on a stop watch or in the driver's seat than just a peak HP gain.

Jake, I went by your website, but could not find anything about the pulley; do you have info on it up anywhere yet?

root_werks 02-12-2010 01:43 PM

I was wondering the same thing. I have my debit card in hand, but cannot find a place on the web site to order the pulley.

BYprodriver 02-12-2010 02:36 PM

Quote:

Originally Posted by root_werks
I was wondering the same thing. I have my debit card in hand, but cannot find a place on the web site to order the pulley.

Send a E-mail before they are gone.

violametallic-S- 02-12-2010 04:11 PM

When purcashing the UP, do you have to buy another belt? Why not reuse the oem one? and again how can I purchase this.

thanks

RandallNeighbour 02-12-2010 04:25 PM

Can someone post pix or a diagram of the underdrive pulley? It's like reading gibberish because I really don't know what this is or where it's located on my motor, but I'm liking the whole idea of more torque and HP for $150!!!

jhandy 02-12-2010 04:29 PM

Not to speak for Jake. I just called thier shop and ordered it, sent in a check and 2 days later it was at my door.
Dont forgret the new belt. He has those as well.
New bolt from pelcan parts.

For randall, here is a picture

http://lh6.ggpht.com/_wrxsG6O0kbU/SyQYUfdA28I/AAAAAAAABD4/QUL2IRN1wsg/s400/DSC02639.JPG

lizBox 02-12-2010 05:31 PM

hey Randall -

Here's a nice write up in the DIY section

http://986forum.com/forums/showthread.php?t=23057&highlight=pulley

Jake Raby 02-12-2010 06:51 PM

Honestly I haven't finished all of my test work with it.. I'd like to continue gathering cold weather data with it through March before we start selling them. I also need to do an install DVD to ensure we don't end up having to support every install and that people don't make mistakes.

I did A LOT of work to jhandy's car back in the summer and knew he'd provide more information for the program, so I felt safe selling him one now.

I have a whole new site ready to upload after the engine class I am instructing next week is over, two dozen new product offerings and more details on other services.
We've been too busy developing to sell.... Thats my main objective; development.

jmatta 02-13-2010 04:39 AM

Spring would be perfect...my Box usually doesn't come out of hibernation until late April or early May. I'm putting this at the top of the list!

Jake Raby 02-13-2010 07:37 AM

I have 3 in stock and consider them proven well enough to sell.. The cost is 275.00 with the shorter belt included, plus shipping.

Email info@flat6innovations.com and Dean will get one shipped out to you.

Johnny Danger 02-13-2010 02:59 PM

I installed a light weight under drive pulley on my vehicle as well; albeit another brand. Unfortunately, at the time Jake's product was still under development. Nevertheless, I concur with his recommendation that its one of the best "bangs for the buck" a person can do to increase the performance of their vehicle. Go for it ! :)

tonycarreon 02-13-2010 04:39 PM

how has this missed my attention? i was thinking "nah, can't be /that/ pulley" but look at that.

syncspeed 02-13-2010 06:43 PM

Quote:

Originally Posted by Jake Raby
a 5/16" (or 8mm) steel dowel inserted through the crank pulley and into the crankcase locking boss does the trick just fine.
I am putting together a kit that includes this improvised tool for the job.


Thank you, I thought about this at first but I was afraid that I would snap the boss off of the case and be totally up the creek.


Take care.

Steve Tinker 02-18-2010 01:29 PM

Just ordered the Flat6 under speed pulley.
Can anyone help with the part number (or where I can find the part number) for the new crank bolt I must order from my OPC - its a 3 hour round trip and I don't want to get there and find I've ordered the wrong part....

jhandy 02-18-2010 02:54 PM

OEM-90008208509

3.50$

http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=OEM-90008208509&catalog_description=Genuine%20Porsche% 20Part%3A%20HEX%20BOLT%20M%31%36X%36%30

Steve Tinker 02-18-2010 03:22 PM

Many thanks for your prompt reply jh.
I'll get onto my OPC today and order, though I bet its more than US$3-50 - more like $350 here in Oz...
Did anyone use Loctite 243 thread locker on the bolt, or just tighten as per the Bentleys manual?

jhandy 02-18-2010 06:56 PM

it has green thread locker already on the bolt. like the caliper bolts.

Steve Tinker 02-18-2010 09:30 PM

That's great - thanks again jh. I suppose the OPC will want extra for that too........ :rolleyes:

yellowstonepart 02-22-2010 06:24 PM

Yellow stone diesel parts plant is one of the leading manufacturers
 
Yellow stone diesel parts plant is one of the leading manufacturers
of engine parts, in particular diesel fuel injection system
accessories for replacement, such as Fuel injection Nozzle, Plunger and
Delivery valve, ETC In south of china .

for more detail please visit our website : www.yellowstonediesel.com
www.dieselinjection.cn

Yellow stone diesel parts plant was founded in 1997.Over the years,
Yellow stone has grown and gained a reputation for producing
high quality products and delivering them on time.

Jake Raby 02-23-2010 05:08 AM

Quote:

Originally Posted by yellowstonepart
Yellow stone diesel parts plant is one of the leading manufacturers
of engine parts, in particular diesel fuel injection system
accessories for replacement, such as Fuel injection Nozzle, Plunger and
Delivery valve, ETC In south of china .

for more detail please visit our website : www.yellowstonediesel.com
www.dieselinjection.cn

Yellow stone diesel parts plant was founded in 1997.Over the years,
Yellow stone has grown and gained a reputation for producing
high quality products and delivering them on time.

We'll keep that in mind if anyone wants to convert a Boxster to Diesel...

Chinese Spammers- WOW.

landrovered 02-23-2010 05:11 AM

Well if we could put the Audi R-10 or R-15 Le Mans TDI in a Boxster I would go for that!

Gary H 02-23-2010 10:09 AM

LOL!


Just ordered mine so fingers crossed will be able to report back in a week or so.
First one in the UK?

Gary H 03-17-2010 02:45 AM

Fitted. Fairly straightforward as my local specialist had a tool to crank off the old pulley. Start to finish, less than 2 hrs with breaks and my limited ability :)

First reactions? Took it down the road and on to a Motorway and planted my right foot. Initial reaction...wasn't impressed. Didn't get the 'fizzy' quick response I was expecting...but then looked at speedo: 120!! OMG!

The net result is a smoother quicker car and it's definitely noticeable, so as a bang-for-buck upgrade, I'm very pleased.

I'm concerned with noise levels because I track my car, so this, a smoother air intake tract and a custom re-flash will be all I'll be doing from a power perspective.

Get one!

BYprodriver 03-17-2010 12:11 PM

Can someone with the flat6innovations underdrive pulley tell me what belt they used??


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