Lillee wrote:
That's not quite right there kev... The plate that you have there has been modified for Ben's turbo By Graham and has a slightly different curve.
Graham Russell did my plate and modified my dissy. There needs to be modifications to the spring as well as and welding/cutting and grinding the slot is not a case of "remove this much" but a case of "make it a total of this long". Also the radius of the slot is important too.
Graham has asked me to tell you all that he will mod your dissy for you for an Ausmini special price that is a fraction of the price he normally charges, as he wants to help all of Ausmini out. Give him a call on 02 9630 2195.
Chong,
I've done a couple now, and my dimensions above are correct for 10* with the plates I said.
I'm not talking about Ben's modified plate that's now in mine... :lol:
BTW the 2 slots in these plates are not exactly the same length. One of the D4R85 slots is 10.3mm and the other is 10.7, the slot is 5.0mm wide with a 2.5mm radius at outer end. I make them each exactly 2.0mm shorter at 8.3 and 8.7mm.. WELD THE OUTER END OF SLOTS ONLY.
The D4R83 plate slots are shorter and angled more, I make both 1.5mm shorter to get 10* advance, as they have a much bigger offset angle.
For a D4R83 with the slot lengths of 8.9 and 9.3mm, I make them exactly 1.5mm shorter at 7.4 and 7.8mm.
<edit>
NOTE there is another advance plate in some of these D4R83s, it's marked +15 and 14.5. It has less of a slot angle than the one above. Slot lengths here are 9.5 and 9.8mm. Make these both 1.75mm shorter to get 10*. Lengths will then be 7.75 and 8.05mm.
Precision is needed for this work, don't attempt it if you don't have the skills.
I don't touch the springs, full advance comes in soon enough.
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.