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> GERMANY'S TYPE 4 FLYWHEEL, HOW GERMANS LIGHTENED FLYWHEELS
Type 4 Unleashed
post Jan 15 2005, 10:47 PM
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Has anyone seen these before?
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Type 4 Unleashed
post Jan 15 2005, 10:48 PM
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Type 4 Unleashed
post Jan 15 2005, 10:50 PM
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Aaron Cox
post Jan 15 2005, 10:50 PM
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group buy! (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/drooley.gif)
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Type 4 Unleashed
post Jan 15 2005, 10:51 PM
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Type 4 Unleashed
post Jan 15 2005, 10:53 PM
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Type 4 Unleashed
post Jan 15 2005, 10:59 PM
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Brett W
post Jan 16 2005, 12:35 AM
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They weren't looking to take much out were they. Bet it probably weighs in at about 10lbs.
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Mueller
post Jan 16 2005, 12:43 AM
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Automotion used to sell flywheels lightened in the same fashion.....

Aaron, it's not that big of a deal for any decent machine shop to make one...figure a few hours of labor (setup and such) and then send it off to get balanced
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DNHunt
post Jan 16 2005, 07:38 AM
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Get it balanced with the rest of the rotating mass if possible. Course if you are not doing a rebuild, you can only balance the flywheel.

That sure looks cool. Too bad all the really neat stuff gets covered with other more boring stuff like bell housings and tin. You have to admit our engines are pretty boring to look at.

I found it really interesting on my engine when I mounted the pressure plate to the flywheel, Jake had indexed the bolts. They were numbered 1-6 and the holes were stamped 1-6. Balance is important I guess.

Dave
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machina
post Jan 16 2005, 08:14 AM
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QUOTE (DNHunt @ Jan 16 2005, 08:38 AM)
I found it really interesting on my engine when I mounted the pressure plate to the flywheel, Jake had indexed the bolts. They were numbered 1-6 and the holes were stamped 1-6. Balance is important I guess.

Gotta love those indexed bolts.

I think there is a problem using a FW less than 12lbs. Not sure why but someone will chime in.
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Brett W
post Jan 16 2005, 10:16 AM
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I ran an 11 lb flywheel with a six puck solid center metallic disk everyday for a year. Once you got used to it, it was no problem. Really grabby though. I wouldn't want to go any lighter than that for street use.
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machina
post Jan 16 2005, 10:58 AM
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QUOTE (Brett W @ Jan 16 2005, 11:16 AM)
I ran an 11 lb flywheel with a six puck solid center metallic disk everyday for a year. Once you got used to it, it was no problem. Really grabby though. I wouldn't want to go any lighter than that for street use.

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I got used to the rigid 6 puck in no time. I was worried about doing gentle starts like when I pull on and off the trailer but now I don't give it a second thought.
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Mark Henry
post Jan 16 2005, 11:26 AM
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Those look like two different flywheels...one has a welded center. Drilling holes near the center doesn't do much and I don't remove material from the back of the friction surface as the fly could warp.
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jd74914
post Jan 16 2005, 03:34 PM
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fours don't sound that bad buddy (IMG:http://www.914world.com/bbs2/html/emoticons/flipa.gif)
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TimT
post Jan 16 2005, 04:11 PM
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here is the way the factory lightened the 906 flywheel


the problem running superlight flywheel is the flywheel is an energy storage device. The mass of heavy flywheel helps keep the engine running at idle.. High compression engine with light flywheelssometime stall. With a distirbutor ignition this can be a pain in the butt. If you have EFI, you can dial in some etra advance at idle so that the engine makes more power, and helps keep the engine idling well.


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Aaron Cox
post Jan 16 2005, 04:42 PM
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QUOTE (Ralph @ Jan 16 2005, 03:40 PM)
QUOTE (jd74914 @ Jan 16 2005, 01:34 PM)
fours don't sound that bad buddy (IMG:http://www.914world.com/bbs2/html/emoticons/flipa.gif)

I’ve come to the conclusion that all fours sound bad. A while back someone posted a movie of a Speedster replica with one of Jake’s motors in it and I would describe the sound as a “cacophony of rattle cans”. Here’s a movie of the Grassroots Motorsports 914 project - btw, it’s for sale for $16,995 obo.


http://www.grassrootsmotorsports.com/IMAGES/914.mov

its all relative,.....

and thems fightin words (IMG:http://www.914world.com/bbs2/html/emoticons/finger.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
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nebreitling
post Jan 16 2005, 04:54 PM
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i love the sound of a six, too -- it's totally intoxicating -- but i've heard a few T4's that sound absolutely fan-friggin-tastic, like a horny wasp on crystal-meth out to rape you. yes, that good.

once you deal with the valvetrain "tapping", they can start to sound pretty good.
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Mueller
post Jan 16 2005, 05:22 PM
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QUOTE (nebreitling @ Jan 16 2005, 03:54 PM)
i love the sound of a six, too -- it's totally intoxicating -- but i've heard a few T4's that sound absolutely fan-friggin-tastic, like a horny wasp on crystal-meth out to rape you. yes, that good.

once you deal with the valvetrain "tapping", they can start to sound pretty good.

I have not heard a Nickies equipped engine(yet), but from what Charles said, they have a different cool sound from the air flowing over the fins (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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Mark Henry
post Jan 16 2005, 06:10 PM
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Nice way for a /6 snob newbie to introduce himself

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Bet it's Alfred (IMG:http://www.914world.com/bbs2/html/emoticons/screwy.gif)
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