Join Date: Apr 2005
Location: Great Pacific Northwet
I used a combo of Google search and Corvette forums to gather names and info, and then went to websites to gather specs to see if any would fit.
The 'usual suspects' were easy to find... RAM, Centerforce, Exedy, Advanced Clutch Technology, Monster Clutch, Hays, Fidanza etc... But all of them were too wide to integrate to the Alfa V6 flywheel (~11 inch diameter). Tilton was a last resort, but I didn't want to play that card if I didn't have to.
All clutches that mated with the GM 1.125" 26 spline drive shaft were too wide as they were all targeted for Chevy V8 use. Then someone on one of the forums mentioned a 'new kid on the block' from Australia, Mantic Clutches and their Mantic 9000 Dual clutch kit. (This hadn't appeared in my generic google searches) Sure enough, 9" wide clutch, capable of handling up to 900-1000 ft lbs, depending on configuration/disk composition. Seems like it would do the trick, and then some! Did some more research and found overall packaging/mounting would fit within the Alfa flywheel specs, but it would necessitate a custom flywheel machining to mate the clutch.
First order of business was to try and just buy the clutch... as all of the Mantic kits I saw included a LS1 V8 flywheel too... at considerable costs. Finally got a response from the Aussie mothership, who pointed me to the US Technical Director out of Atlanta. Geoff said they were working on a special kit sans flywheel but it would take a bit of time before he could offer me one.
In the meantime I needed to track down someone who could fabricate a custom Alfa V6 flywheel to the mounting specs I had for the Mantic. Again, talking with Turbonutter, he passed a long a person in the UK who had machined a new flywheel for him for his 24v Busso engine with Tilton clutch. Initial contact seemed positive and then the guy stopped communicating... as things moved forward on the actual purchase of the clutch assembly, things dried up for this UK contact. So I started searching US speed shops and all. Contacted a good 20-30 I think before Group2 found/provided a shop out of SoCal that was willing to take on the work. Phew!
While all that was coming together... needed to figure out how to connect the forward part of the Chevy torque tube bell housing with the back of the Alfa engine. What I really needed was an Alfa Sei bell housing that I could use to interface with the Corvette bits. But those just don't fall from the sky....or do they? Again, doing some searching I came in contact with the Euro/UK president of the Alfa Sei club.. who was more than willing to sell me a bell housing... for a very high price. For that price, I figured I might be money ahead to just fab something directly. Then not more than a few weeks later I went to the NWARC's 50th anniversary party, held at one of the founding members house/garage-mahal (2LiterLover). I was talking to another member who races Alfas & Bimmers. In mentioning my project and all, and that I was in need of a Sei bell housing, he immediately informed me that not only did he have one he was thinking about selling, but it was in the trunk of his car, not more than 30 yards away! After some more talking and pleading, it was mine for a very, very reasonable price. Manna from heaven. Sei bell housings really do fall from the sky!
Here's a pic of the Mantic with the V8 flywheel that it comes with. Pics of mine with the custom flywheel will be provided later on.
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