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Old 07-23-2009, 08:36 AM   #11
Vincent
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Nice build, it inspires me to do the same to mine. I didn't see it but what do you expect out of it?
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Old 07-23-2009, 10:42 AM   #12
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Its just being rebuilt for functionality. No porting/polising/bigger valves or cams. This is a spare head that I have.

If I were to install it on a duratec motor I wouldn't expect much but reliability out of it because the D23 head flows much better.

Who knows...maybe I will source a D20 block for cheap and build something fun like a buggy.
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Old 07-27-2009, 10:09 AM   #13
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I didn't see any shots of the valve spring seats. At what point did you remove them? I just received my supertech valve spring kit and it came with valve spring seats. I figure i should replace them!
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Old 07-27-2009, 10:27 AM   #14
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Valve spring seats?

Do you mean valve seals?

I am not sure what you are talking about. Maybe the supertech parts use a seat that goes on top of the valve seal???

Post up a pic of what you are talking about, and I can probably tell you what you should do with it.

Unless someone else with the experience pipes in before that happens.

By the way, the head in this thread is a D20.
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Old 07-27-2009, 11:13 AM   #15
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Needless to say, i'm a bit confused right now.

On your D20 head there were no metal spring seats that came out after the springs? Just the valve seals?

My supertech set came with springs, retainers, and valve seats. Not valve seals. They're cupped like they need to be on the bottom of the springs. I'll get some pictures when i get a moment today. I'm at work. Im sure it goes on the bottom of the spring. I'm going to be picking up my friend's ford workshop manual later today to research it. .

For now, here's the information that's on the box and on the packet of seats. I understand that you wont need all of this, but im posting it all anyways.

Sticker on packet of valve seats:

SEAT-DUR/1
Spring seat locator for SPR-TS1015 / Duratec engine


Posted on the box:

MAZDA/FORD 2.3 DURATEC SINGLE VALVE SPRING KIT
KIT# SPRK-TS/DUR-S

Spring: SPR-TS1015/SINGLE

Titanium Retainer: RET-TS5.5/T1

Spring Seat: OEM + SEAT-DUR/1

Seat Pressure: 55lbs @ 34.30mm installed height

Spring rate: 9.5lbs/mm

Spring coil bind: 20.7mm

Recommend Max Lift: 13.6
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Old 07-28-2009, 02:29 PM   #16
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I dunno. I'll start tearing my D23 head down today and let you know what I see in there.

I am sure someone else has already done one though...

And yes, you are correct about the D20 head. No seats.
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Old 05-06-2013, 07:47 PM   #17
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the tappets fell out of my head

is there a way to put the tappets back in the right spots
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Old 05-27-2013, 03:00 PM   #18
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thanks for the post. quick question though whats the difference between the D20 and the D23 head? Is it just the combustion chamber size? If i port and polish the D20 would it turn into D23?
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Old 05-28-2013, 04:32 PM   #19
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Quote:
Originally Posted by jonnmandy View Post
thanks for the post. quick question though whats the difference between the D20 and the D23 head? Is it just the combustion chamber size? If i port and polish the D20 would it turn into D23?
slightly larger port on the intake side. same exhaust, same CC size
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Old 05-28-2013, 05:06 PM   #20
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slightly larger port on the intake side. same exhaust, same CC size
so all you really need to do on a D20 head is port the intake ports a little more and then its a D23?
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