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  #11  
Old 04-24-2012, 09:13 PM
zav6a zav6a is offline
 
Join Date: Dec 2005
Location: Sedalia, Colorado (KAPA)
Posts: 320
Default Not all need a recess

I used one of the chech governors, starts with a Z that whirl wind sells and it fit a 6a without the recess. Most said it could not be done. A 4 is certainly a different animal but the moral of the story is to measure.
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Duane Zavadil
RV-6a, IO-320
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  #12  
Old 04-25-2012, 08:32 PM
Skysailor Skysailor is offline
 
Join Date: May 2011
Location: Atlanta, GA
Posts: 238
Default Watch the governor speed ratio

The prop governor for a 540 runs at a different ratio than one for a 4 cylinder. Make sure you talk to a governor shop to determine if yours will work on a 4 cylinder without modification. The shop I talked to said most could be modified to get the gearing correct but be aware you will incur cost to have this work done.
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  #13  
Old 04-25-2012, 09:14 PM
zav6a zav6a is offline
 
Join Date: Dec 2005
Location: Sedalia, Colorado (KAPA)
Posts: 320
Default Sorry

I said the manufacturer's name began with a z. It is actually Jihostroj.
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  #14  
Old 04-27-2012, 09:18 AM
nmarshal nmarshal is offline
 
Join Date: Jan 2005
Posts: 11
Default

Vans sells the materials and plans to make this cut-out - no need to re-invent the wheel.

Nigel Marshall
RV-4


Quote:
Originally Posted by Mr Charles View Post
I purchased a 4 built in 93 and am trying to convert from FP to a CS...someone mentioned older 4's didn't have a firewall recess for the govenor...can someone provide info on this for me? Pics of the recess...how to retrofit...ideas? I have a PCU 5000 located, which I understand is a fairly small govenor...will it work without firewall modification? Also, I am concerned because I have a Christianson inverted oil system, and think I may have a lot of stuff "in the way" for govenor installlation...anyone have this combination on a completed 4 ?
Thanks!
Charles
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