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Aussie Gremlin

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mbwicz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mbwicz Quote  Post ReplyReply Direct Link To This Post Posted: May/07/2022 at 11:38am
If nothing else, the Eddy heads would give you a chance to try a different valve spring setup.  If you get the valve float under control, then the extra RPM from slippage may not be that big of an issue, if the misfire goes away.

But it would be interesting to try!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: May/08/2022 at 5:32pm
I was saving the Eddys as an upgrade for the winder break, we only have 3 more weeks of racing this season, but I'm going to have a crack at getting them on before the track shuts.

I wanted to do a bit of work on them before installation and managed to get one finished this weekend, made a start on the other. Seems there is not that much to do to them really, just gasket match them and smooth out the runners, mostly sanding roll work, just need more sanding rolls now.

If they work beyond my expectations and drop me into the 10's at least I would have the winter break to install a cage in the car. Pretty unlikely I know, I'm thinking they might be worth a couple of tenths, 40 lbs off the front has to help if nothing else. 

Intake:



Exhaut:



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve Obertanec Quote  Post ReplyReply Direct Link To This Post Posted: May/08/2022 at 9:18pm
I'd check the valve job. The factory valve job is marginal at best. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: May/09/2022 at 3:49am
Hopefully I can get them in for a quick skim and a decent valve job before they go on. 

Got hold of some fresh sanding rolls today, so maybe I can sort out that area around the sides of the exhaust valve guide boss as well. I also have some upgraded valve springs to go on.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2022 at 2:49am
I've been working away on the head swap, but rather than post a heap of boring photos I've done a little video instead:



Just need to get to the track before it shuts for winter now to see if all of the trouble was worth it.

PS: Just realised that I haven't hooked up the brake booster hose yet.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PROSTOCKTOM Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2022 at 3:11am
Sound great. Has it changed your tuning curve or have you had time to get into that yet?

Tom
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Post Options Post Options   Thanks (0) Thanks(0)   Quote WesternRed Quote  Post ReplyReply Direct Link To This Post Posted: May/21/2022 at 3:26am
There is some little bloke from Holley inside twiddling the dials, i.e. mostly running closed loop so I guess it will sort itself out. Not sure if I should be changing the timing for the alloy heads, compression should be up from 10.5 to 11.0, but then alloy heads are supposed to like a little more compression.

Any bold predictions on what it will do, has run 11.6 @ 115 mph with the iron heads, some porting involved, but still factory valves.



Edited by WesternRed - May/21/2022 at 3:28am
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