Original Posted By: "Dick Navratil"
Subject: Pietenpol-List: corvair heads / progress reportHey corvair people..When doing a valve job, according the the WW manual, you are to use "wide seats".Does this presume that for every valve job you're replacing the seats? Also,what are people doing for valves? Using new, existing, stainless??I found a local performance engine shop that is pretty good to work with, plusit's 3 miles from my house so I can inspect things at each stage very easily.Dropped the heads off tonight. WW has the crank, distributor and front startercomponents in the works... Clarks has the cylinders, pistons, cam, etc.. Prettysoon I'll have all the parts together for this thing and once I have theengine completed, hopefully that will spur on the rest of the project.Hopefully, by spring the engine will be ready to run and I'll have the fuselageon gear. Then over the summer complete the wings. Man - if all goes well Icould get this thing done in 2-3 more years... Sorry for the rant, just getting wound up again... Besides, tonight I flew the172 and fuel at KMIC is 4.45 / gallon. That equals about $45 / hour in fuelalone. OUCH. I'm setting the Piet up for Auto gas so at least I'll save a bucka gallon.Seeya,Tom B.________________________________________________________________________________
Pietenpol-List: corvair heads / progress report
Re:Pietenpol-List: corvair heads / progress report
Original Posted By: Hans Vander Voort
It sounds to me like there are two things being discussed under this same subject line... one is latches for a side entrance door and the other is the wing cutout 'flop'. On 41CC, the wing cutout flop comes up to the in-trail position if left alone in flight and has very simple slide latches on the underside of the trailing edge to keep it from lifting up to reflex. Nothing complicated.However, here's a thought (untested; just an idea). How about those spring-loaded roller ball latches that are used for closet doors and bifold doors? One of those on each side of the flop would be plenty of resistance to hold the flop in place, yet a push upwards would pop the flop and let Pop hop without a bop on his top ;o) And they are available in brass finish, too...Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________Subject: Re:Pietenpol-List: corvair heads / progress report
It sounds to me like there are two things being discussed under this same subject line... one is latches for a side entrance door and the other is the wing cutout 'flop'. On 41CC, the wing cutout flop comes up to the in-trail position if left alone in flight and has very simple slide latches on the underside of the trailing edge to keep it from lifting up to reflex. Nothing complicated.However, here's a thought (untested; just an idea). How about those spring-loaded roller ball latches that are used for closet doors and bifold doors? One of those on each side of the flop would be plenty of resistance to hold the flop in place, yet a push upwards would pop the flop and let Pop hop without a bop on his top ;o) And they are available in brass finish, too...Oscar ZunigaSan Antonio, TXmailto: taildrags(at)hotmail.comwebsite at http://www.flysquirrel.net________________________________________________________________________________Subject: Re:Pietenpol-List: corvair heads / progress report
Original Posted By: santiago morete
27, 2005) at 2005-09-27 16:39:32Tom,I would not replace the valve seats unless there are damaged or loose.Just check the valve guide wear and replace valve guides if needed.You can re-use existing valves if they are not worn out, just clean them upreal good.Just re-grind / lap the valve and valve seats, you can do this yourself ,with some lapping compound and tools from a auto parts store.I choose to replace all moving parts, springs, retainers, stainless valvesand some of the valve guides.Suggest you get a copy of Richard Finch's book on Corvair, it describes theoverhaul process more clearly than GM' shop manual (green book)Plus it clearly shows what not to do with valve seats!Hans________________________________________________________________________________Date: Wed, 28 Sep 2005 00:04:02 +0000 (GMT)
27, 2005) at 2005-09-27 16:39:32Tom,I would not replace the valve seats unless there are damaged or loose.Just check the valve guide wear and replace valve guides if needed.You can re-use existing valves if they are not worn out, just clean them upreal good.Just re-grind / lap the valve and valve seats, you can do this yourself ,with some lapping compound and tools from a auto parts store.I choose to replace all moving parts, springs, retainers, stainless valvesand some of the valve guides.Suggest you get a copy of Richard Finch's book on Corvair, it describes theoverhaul process more clearly than GM' shop manual (green book)Plus it clearly shows what not to do with valve seats!Hans________________________________________________________________________________Date: Wed, 28 Sep 2005 00:04:02 +0000 (GMT)