73GT wrote:
Hi Kev
thanks for the insight into your build.
can you help with 2 points you mentioned.
1. breather out of fuel pump hole, doesnt it work, even with a long hose up to a breather tank?
2. I also have a 22G68 3 sychro box that i have started to fit to a 1300 engine, std 1.75" B/E crank & stroke. i fitted the box to the block i got the same fouling problem. Are you able to show how much has to be ground out so i can see how much welding/fab will be needed.Want to use this box because it is a SCCR & dont have a 4 synchro version.
Q1.
I say it doesn't work (with PCV), GR says the same. However you can buy a breather for there from MiniMania in US.
I've not tried a long hose into a breather tank.
My story is this- when I built this motor previously (1310cc, forged flat top Mahle pistons, VP3 cam etc) all was fine during running in. But the minute I went over 4500 rpm it sucked heaps of oilz up into the PCV valve and manifold. Made like JB007...
Apparently the spinning crank & rods throw wads of oil straight at that hole. Not a great spot for a breather. So I fitted one in the right place, to the flywheel housing.
Q2.
A 22G68 might be OK with a 1275 `supposedly' but I have one here which fouled there, with S crank and rods.
Most I've seen with a 1275 on had a bit of grinding inside.
I would inspect a 4 synchro box flange, grind it out to that- their front flange scallops are on the centreline of the boltholes.
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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.
