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Re: Lsx Swap Thread 408 to ZF6

Subject: Re: Lsx Swap Thread 408 to ZF6
by Danspeed1 on 2022/1/6 21:18:07

Quote:

bogus wrote:
The problem with the quicktime bell housing is the built in problem with the clutch in the first place - screwed up geometry.

There just isn't enough room, and using that layout will cause more math problems than I can think of. The fork angle would be whack as hell, I suspect.

As for the input shaft from the ZR1... you would need to get into the transmission, but I think it can be machined... meaning, you can cut it shorter and machine new splines in. I would look into that.

The Aussie flywheel would be a good fix. Make sure the rotating mass is internally balanced, and the new flywheel, whichever one you use, is neutral balanced. The DMFW is balanced to the LT1... and weighs over 40lbs. From my experience, you don't want to go much less than 20lbs, the aluminum flywheels are just too damned light and store no energy in them... Also can be tricky to get started smoothly.

In the old days, so to speak, to convert the Fbody steel flywheel, it was advised to cut .090 off the flywheel and then get it match balanced to the DMFW. Problems solved.

All I can suggest - don't go cheap on this build. If done wrong, you will spend more money making it right!!

Well I made a decision and ordered the parts so I am committed at this point. This was a really tough one. I would have much preferred to take the whole car apart, measured everything and then worked from there but having done the C6 and the Chevelle over the past few years, I know the car will be off the road 3x the amount of time; and even with the LT1 we are thoroughly enjoy it so I do not want to do that.

I literally couldn't get in touch with the Aussie company, and considering the politics over there right now I really wasn't comfortable attempting to try and get ahold of them, get it shipped, and so on. The engine is at the machine shop and we are ready to go. I posted EVERYWHERE and nobody has ever seen a 153 tooth SBC to LS flywheel other than that one. Called all the major manufacturers, nobody had any interest in making one.

I decided to go with the quicktime bellhousing and a complete Fbody Clutch Setup from Monster. I wanted to cut down some of the weight but I made sure to go with their Billet Steel Flywheel (heavier) and I only selected their stage 2 setup which has a full kevlar disk but is sprung. I really don't want to listen to that ZF6 rattle if I can help it.

I agree, the pivot fork geometry is already a problem, and I saw a few failed attempts on the other site involving pull type clutches and adjustable pivot pins so after a week or so of reading I think the best course of action is a one piece hydraulic throwout bearing and the Fbody Push type setup. I did not purchase the TOB yet, I will wait till the car does come apart so I can measure the input tube and then I will find one either from McLeoud or another source.

Finally called TSP and they recommended the Torquer V4 Cam for my application which makes me very happy, since I have one sitting on the shelf from another project; so I saved a few $$ there!!!

And... my wheels finally showed up yesterday after 3 months of waiting, so I will get those on in the next week or so and post some pictures. They looks fantastic sitting in the box.

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