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Big Valve 1.6 Head
by
UnderPSI
on 16 Jul, 2010 10:56
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Putting 39mm intake and 34mm exhaust valves in a 1.6 head. Just got the seats and vavle guides in. Need to do some work on the exhaust and a ton of work on the intake to get the ports to blend with the seats.
Intake
Exhaust
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#1
by
Rabbit on Roids
on 16 Jul, 2010 11:40
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anyone know what comes in an AAZ head? valve size wise?
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#2
by
truckinwagen
on 16 Jul, 2010 20:33
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very cool, I was going to try this myself.
quick question though, how close does this put the valves to the side of the bore?
also, do you think there is enough meat in the head to port it to that extreme without getting too close to the water jacket?
is it a hydro, or a mech head, and where did you get your valves/seats?
-Owen
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#3
by
UnderPSI
on 17 Jul, 2010 08:31
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It's a mech head.
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#4
by
UnderPSI
on 17 Jul, 2010 14:25
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#5
by
truckinwagen
on 17 Jul, 2010 15:59
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very cool, would you mind taking a pic with a headgasket on it to show how close the valves get to the sides of the bore?
-Owen
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#6
by
UnderPSI
on 17 Jul, 2010 18:05
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Don't have the headgasket with me. Putting a 1.9 metal gasket on it. Should have room, block is done .5mm over that will give a little exta.
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#7
by
arnold
on 18 Jul, 2010 08:14
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Where did you get those valve's and seats ?
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#8
by
UnderPSI
on 18 Jul, 2010 10:17
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Machinest got the seats for me, the valves are of the shelf parts but I'm not sure if they will work quite yet.
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#9
by
truckinwagen
on 18 Jul, 2010 14:11
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when I was thinking of doing the same, I was thinking of using valves built for the aircooled VW.
they are cheap, available in a wide range of sizes(and in stainless) and have the right stem diameter to use the stock guides. the stems are too long, but any good machinist can cut them down to the proper length no problem.
you can get the stainless aircooled valves in just about whatever size you want for $10 per valve, and most of the retailers of the aircooled valves sell seats to match them too(but your machinist can probably get them for you cheaper)
are you willing to tell us how much you paid for the parts and machining?
I may just do this while I have my motor apart...
-Owen
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#10
by
UnderPSI
on 18 Jul, 2010 14:16
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Seats and guides were around $350. Trying to make it work with off the shelf parts to keep cost down use readily available parts. Also going to be using a hydro cam, hopefully everything will work without custom parts.
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#11
by
RabbitJockey
on 18 Jul, 2010 17:07
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are 1.9 and 1.6 valves the same size?
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#12
by
MJF
on 18 Jul, 2010 17:18
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1,6 34in 31ex
1,9 36in 31ex
mech valves ~105mm long, hydr ~95mm.
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#13
by
Aki-76
on 18 Jul, 2010 21:09
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#14
by
UnderPSI
on 18 Jul, 2010 21:20
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41mm in / 35mm ex
Maybe just a hair big for a 77mm bore.
