Posted by Hamish on September 18, 2007, 9:23 pm, in reply to "Re: This is one of the posts that started me on the HEI thing."
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I've never had too many problems with those clean South Island rivers. But the muddy slop we tend to have to live with around Wellington will find any weak point in most ignitions. But - I see Chev V8 with HEI covered in mud & slop that never miss a beat. I'm told it can be the same in a RR, but I think I'm about to give it all away as a hopeless task. Thanks for your thoughts though. Hamish --Previous Message-- : Well I can't say I have ever had real : problems with water in the dizzy / coil : in my Rangie and it spends a few hours : in rivers... : : Anyway, one of the comments in that : offroad express is wrong... the voltage : from the reluctor in to the primary : side of the HEI module does get very : high, at idle it may be 20-30 volts but : once you get up to 4000 rpm it is well : close to 200v peak to peak, you may not : see this with a meter but an 'scope : will show you that. Get water on the : primary side and you will have : problems..... : : Now who was who said they run their : rover to 4000rpm, not a good idea if : you want to keep the engine in one bit, : in my case with the Crow torque cam, : there is nothing left at 4000rpm, I rev : limint at 4500 and cut at 5000 and : think they are both high.... : : If you really want to get rid of water : on dizzy/coil issuse may be a direct : fire system is what you need, yes water : will stop it, but there is more of it : so you need water in more places to : kill it completely, not like a dizzy : which takes very little. : : Once I get rid of my kitset discovery : and a few other projects I can turn my : attentation back to megasquirt and 4 : coils and get rid of my dizzy... : : Max : :