vw cylinder heads, deli sliced

[volkaholic1]

I know I will catch some flake for this, but I needed to do it. I wanted to see how thick the metal was in the cylinder heads. I plan on going type plug on type iv heads, and I have only found 2 folks that will do it, and they only sell complete engines, so that is not an option for me. I cut them on the horizontal band saw a work, it did not take too long. don't worry, these heads are junk from broken fins.

type iv on the left, type 1 on the right

exhaust valve

intakes

spark plugs, note that angle and chamber shape differences

planned plug location, 100 thread, 16mm plug clearence, 22mm socket clearance

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Volkaholic

[Glenn]

Very cool... thanks for posting.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

עַם יִשְׂרָאֵל חַי

[modok]

Flack? heck no. Junk heads are more common than good ones,
I did a type-1 about 8 years ago and it looked just like the PICs from the one they cut apart in "how to hotrod" from 1970. Not much changes

Never seen a type-4 done tho that's cool

[Vanapplebomb]

Thank you for posting! That is pretty cool to see a Type 4 head sectioned like that.
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1800 Type 4 Berrien 295

http://www.thesamba.com/vw/forum/viewtopic.php?t=487021

[mark tucker]

been there done that,used to do v8 iron heads to see how far they could be ported saftly.there is a lot you can see with your head sliced up.

[VWCOOL]

Yes sections can confirm - or otherwise! - the validity of an idea.
Are you researching a twin-plug conversion?

[volkaholic1]

that is my plan, twin plug the type iv heads myself
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Volkaholic

[dawie]

Thanks for sharing.

While there are many pictures around of heads sectioned through the ports, this is the first time i see one sectioned through the plug hole position.

Personally, with a type 4 head, i would not mind removing pushrod tubes when replacing lower plugs. This is easy, as unlike a type 1, they just slide out without having to remove the heads. Valve clearances have to be adjusted in any case, so removing the rocker assemblies when replacing lower plugs would be no problem for me.

[58 Plastic Tub]

Thanks for posting, Clark. That's going to be fantastic!
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Stan Galat
"A single point in isolation is a reference point. Two points is a line. Three points is a trend. Trends don't lie."

[VWCOOL]

[volkaholic1]

yes, it looks like it might be easiest to plan on pulling 1 push rod tube, or mabye just make a special spark plug wrench, either way it can be done, we shall see
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Volkaholic

[Howard 111]

A nice job, thanks for posting it.
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1973 Karmann Ghia
Turbocharged, Fuel Injected
http://www.thesamba.com/vw/forum/viewtopic.php?t=531270

[KROC]

Damm, you really can see how crappy the exhaust port is on the T4 head this way.....

[raygreenwood]

Yes....there is a really nice set of type 4 sections on the STF about 6 years ago. They were section very well to show just what could and could not be ported on a type 4 head exhaust and the otherwise better that type 1 intake port and angle. Nice work! Always something to be learned. Ray

[mark tucker]

whats rong with the exhaust port?
might be able to relocate the pushrod tube some for better clearance.

[miniman82]

The mega exhaust guide boss, you could take a pound of aluminum out of that monstrosity.
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Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

[Vanapplebomb]

[raygreenwood]

I agree...stock to stock the type 4 heads flowed better.....but the issue with the exhaust port....and im going by like 6 years ago memory here so dont re quite this.....but from work that Jake Raby and HAM did....which spawned the original set of picture of deli sliced type 4 heads on the STF........
Where the type 4 exhaust port was found to benefit the most....getting greater exit velocity....was on the bottom side of the exhaust port....where there is very little meat as you can see in the picture.
Yss removing a hunk of guide boss gives more room for expansion/voulume....but with a bit more sectioning you find that right behind that hump is the exhaust stud. No much room to move and only so much deck holding that valve seat in.
.
Yes...its a better head than thpe 1 stock to stock but there is little room for modification. Ray

[mark tucker]

a good head porter should have no issues with that port porting it correctly for what it is. yes I saw the turd,but like I said...good head porter.