Building a 7 bolt... What clutch?

[EclipseGST]

Thanks Jason... I gave my you my parents fax number which also happens to be the home phone number, they werent expecting a fax at 10:30pm so thats why they were answering it. I'll give you a call tonight and let you know when to send it.


My friends 93 TSi AWD crankwalked, but that is a rare occurance.

I could have sworn I read something that there is a lack of tranny mounts supporting the 2g transmission in the right places, or not supported at all. I havent worked on many 2g's before, but I do remember reading something about that.

No one knows why 2g 7bolts walk so often, and no one probably ever will.........

I dont know about that. 2g's have 3 tranny mounts so it is definatly supported well. The only thing I could manage to think of out of that info is if the place you read that from meant the engine has a lack of mounts. I could see the crank being forced up by the weight of the engine pushing down on it while attached to the tranny considering there is only 1 motor mount on the engine (drivers side). Then by the crank pushing up it crushes the upper thrust bearing and while pushing in the clutch it moves the crank over and crushes the sides also. There for the crank is just flopping around in there. This is the only thing I could think of but if that was the case I think a lot more cars would have it.

[dsm95gsxer]

http://www.magnusmotorsports.com/crankwalktheory.htm

One of the better crankwalk articles.

[slowbubblecar]

I "think" barton had a 2600 but I know it was defenitly crankwalked. I thought I heard it was at like .030 whick is huge.

[Shane@DBPerformance]

I have stuck with the 7-bolt because I know I won't be putting many miles on the motor. Even a shitty 7-bolt can handle a few thousand miles without crankwalking enough to cause too many problems, and I am cheap.

[Goat Blower]

It's not just from a heavy clutch, 1/3 of the CW cases have been automatics. And the engine mount theory, no dice. I came up with that 4-5 years ago, no response from anyone in the know.

Just make sure you have someone build the engine that knows what they're doing, use the correct size main bearings(there are three different sizes if I remember right) and if you are using ARP's on the mains, make damn sure you had the mains line bored and are using the dowel pins.

Any engine can walk, the 7-bolts just seem to have the problem more often than most motors.

[Pimpin Dsmstyle]

Mike sure as hell knows how to build a motor, but Careys walked last year?

[Goat Blower]

Shindley has probably built the most 7 bolts around here.

[Pimpin Dsmstyle]

Shindley has probably built the most 7 bolts around here.
Most people are smart enough not to build 7 bolts. Jakes case is a rareity, more ppl dont basically get given a "built" 7 bolt.

[CDeutsch]

I have a built 2.4 seven bolt with Eagle rods and Ross pistons and I still wish I just would have gone with the 6. The damn thing makes me nervous everytime I hear any odd noise. It's just not worth the risk. Mine is still running but so far it's only seen a stock clutch (12.5 quater mile with it) and an HKS twin disk. My HKS gave me problems. Besides being a bitch to install, I was never able to get it adjusted between not disengaging enough and having pedal pump up. Eventually some how I managed to snap 3 of the 6 flywheel studs. :confused: I'm now in the process of intalling a Horse Power freaks feramic disk with an ACT 2100.

My HKS clutch may still be usable if you buy some replacement studs and/or a rebuild kit. The disks didn't seem to have any problems before the studs broke but I'm no expert just looking at it. If you want to take a risk I'll sell what I have for $100. I'm to fed up with it to give it another try.

[CDeutsch]

Oh and I still remember the advise someone gave me before I started my build. "When you're adding up all the money you're saving don't forget to add in the price of a new moter after yours walks." ;)

When it comes down to it, it's a gamble. And currently the odds are much better if you just do a 6 bolt.