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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!! |
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. |
Great, could you provide any tips on what you used to hold the stock pulley in place in order to break the bolt free?
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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. |
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
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Seems like a good mod to me.
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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. |
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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. |
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: |
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.
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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. |
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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.
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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 |
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!!!
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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 |
hey Randall -
Here's a nice write up in the DIY section http://986forum.com/forums/showthread.php?t=23057&highlight=pulley |
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. |
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!
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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. |
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 ! :)
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how has this missed my attention? i was thinking "nah, can't be /that/ pulley" but look at that.
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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. |
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.... |
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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? |
it has green thread locker already on the bolt. like the caliper bolts.
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That's great - thanks again jh. I suppose the OPC will want extra for that too........ :rolleyes:
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Well if we could put the Audi R-10 or R-15 Le Mans TDI in a Boxster I would go for that!
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LOL!
Just ordered mine so fingers crossed will be able to report back in a week or so. First one in the UK? |
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! |
Can someone with the flat6innovations underdrive pulley tell me what belt they used??
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