On the fly.....
A small diversion from assembling shiny bits. Back into the workshop.
As I have the BOFO 32 valve V8 and 6 speed manual gearbox it is customary to have some type of clutch device between the two.
It will come as no surprise that I had already bought two clutches for the car (1 x single plate Puk clutch and one twin plate), neither of which I was 100% happy with, but a couple of weeks ago I found a larger, sexier twin plate clutch which came on an LS flywheel. Good for 1000bhp and over 800lb/ft it fits the bill nicely.
'But" I hear you cry, 'the LS 6-bolt flywheel will not fit on the 8-bolt mod motor crank.' No, so the plan was to unscrew the clutch cage from the steel LS flywheel and bolt it on to the stinky Boss cast flywheel:
But to scupper that plan slightly, the ring gear on the LS is only about 4mm smaller than the Boss one with the same tooth pitch, so I figured that if I can move my starter by 2mm (easy-peasy) then modifying the LS flywheel would give me a better, stronger and probably lighter set-up.
So starting with the LS part:
I turned up six 'slugs' to fill the bolt holes, welded them in place, and smoothed them off:
But not only does the LS have fewer bolts, it also has a larger centre hole. What it needs is a 'top hat' type flange to reinforce the 8 bolt fixing and step down the centre hole.
I didn't want to pay the $50 that the local steel merchants wanted for a bit of steel to make it out of, but I did have a Toyota Hilux halfshaft (that I'd previously cut up to make spacers) which had a hub easy large enough to get my flange out of (I'd already faced it off in this pic) :
So I made the stepped-flange with LS size outside diameter and Boss size inside, then made a madrel the same size as the Boss flywheel, then dropped the flange and flywheel on the mandrel to drill the holes through. Top tip is this bolt 'spigot' which has been cut down and drilled to accurately mark and pilot-drill the centre of the holes. Nicked that idea from those Binky boys:
And after all of the holes have been drilled in the flange, this was fitted to the LS flywheel, and once again using my little centre spigot the holes were marked, piloted and drilled:
And after far too much time, the LS/Boss flywheel lives!
Sneaky-peak of the sexy clutch grippy bits:
More on the clutch mods later.