Quick question about head valves.

Legacy · 2008-10-10

Does the 1989 GT 2.2 Turbo Head have E0 or E1 valves? Thanks in advance.

SixSick6

· #2 · Oct 10, 2008

E1, E0 are non-turbo. They'll fit the same but according to Mazda aren't the same, hence twice the pricetag.

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Legacy

Discussion Starter · #3 · Oct 10, 2008

SixSick6 said:
E1, E0 are non-turbo. They'll fit the same but according to Mazda aren't the same, hence twice the pricetag.

Nice...

The car I bought has E0, someone swapped the head from a non-turbo I am assuming?

They work fine apparently, what is the real difference between them? Ceramic coating?

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Keeloh

· #4 · Oct 10, 2008

On the cylinder head theres some numbers and it says F220 thats for turbo and F201 is N/A

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defiler

· #5 · Oct 10, 2008

They work fine apparently, what is the real difference between them? Ceramic coating?

The turbo ones supposedly have a high sodium content.

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moebius

· #6 · Oct 10, 2008

defiler said:
The turbo ones supposedly have a high sodium content.

Gah,

They don't have sodium in the middle.
They aren't sodium filled.
shame on you for perpetuating that myth.

IF *anything*... the exhaust valves on the GT *are* different because they have been heat treated, and are harder than the non-turbo exhaust valves.

Which makes some sense as the GT exhaust temperatures are higher than the non-turbo exhaust valves, so you'd want valves which maintain their strength better at higher temperatures.

everyone who has cut the exhaust valves apart has noted that it was significantly more difficult (ie. they when through more cutting wheels) than the intake valves, or the exhaust valves of the non-turbo.

Keep those exhaust temperatures down, and it simply doesn't matter.

But there is no sodium in those valves.

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Legacy

Discussion Starter · #7 · Oct 10, 2008

So...

If I am boosting 1 bar, will I see any possibly valve failure/damage with the type E0? And the fact my car has a BOV now, occasional backfires have been occuring, will that cause any damage?

Funny my GT has non-turbo valves, possible head swap, hence the crappy head gasket I found on it.

:shrug:

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compnut21

· #8 · Oct 10, 2008

well if really necessary i have some E1 valves on my junk head. if i can pull them out i'll ship them to you if you'd like.

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Ragnarock01

· #9 · Oct 10, 2008

I ran non-turbo, after market valves on my head for almost a year with no problems. I didn't run insane amounts of boost but my head is ported and I have a bigger turbo. However I have official E1 valves now just because I didn't want to take any chances, so really it's about how much you're willing to spend.

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Zach

· #10 · Oct 10, 2008

moebius said:
Gah,

They don't have sodium in the middle.
They aren't sodium filled.
shame on you for perpetuating that myth.

IF *anything*... the exhaust valves on the GT *are* different because they have been heat treated, and are harder than the non-turbo exhaust valves.

Which makes some sense as the GT exhaust temperatures are higher than the non-turbo exhaust valves, so you'd want valves which maintain their strength better at higher temperatures.

everyone who has cut the exhaust valves apart has noted that it was significantly more difficult (ie. they when through more cutting wheels) than the intake valves, or the exhaust valves of the non-turbo.

Keep those exhaust temperatures down, and it simply doesn't matter.

But there is no sodium in those valves.

He never said they had sodium in the middle nor sodium filled, just high sodium content. Are you a metallurgist? Have you taken the time to analyze the metal and it's chemical properties?

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Legacy

Discussion Starter · #11 · Oct 11, 2008

Well if anyone can answer this:

Will running 14psi lead to catostropohic (ThAts RighT, BiG wErdS) failure eventually on E0 type valves?

I would like to know if anyone has experience of problems, so I can figure out if I need to save up money now and replace them before I will need to replace alot mo'.

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Zach

· #12 · Oct 11, 2008

F1 MCL said:
Well if anyone can answer this:

Will running 14psi lead to catostropohic (ThAts RighT, BiG wErdS) failure eventually on E0 type valves?

I would like to know if anyone has experience of problems, so I can figure out if I need to save up money now and replace them before I will need to replace alot mo'.

Well first off, if you're going to use BiG wErdS, lrn2spell catastrophic. As for running 14psi, my head had two E0 valves in it, #1 and #4. I ran 15psi on a tbird for quite a while with no issues.

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Legacy

Discussion Starter · #13 · Oct 11, 2008

Zach said:
Well first off, if you're going to use BiG wErdS, lrn2spell catastrophic. As for running 14psi, my head had two E0 valves in it, #1 and #4. I ran 15psi on a tbird for quite a while with no issues.

Freaking awesome, thats all I needed to hear. LOL was waiting for someone to point out my horrible mispell, after I noticed it...I was to lazy to fix it, you r winnar!

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defiler

· #14 · Oct 11, 2008

He never said they had sodium in the middle nor sodium filled, just high sodium content. Are you a metallurgist? Have you taken the time to analyze the metal and it's chemical properties?

I'm glad someone actually READ what I wrote:tup:

Gah,

They don't have sodium in the middle.
They aren't sodium filled.
shame on you for perpetuating that myth.

IF *anything*... the exhaust valves on the GT *are* different because they have been heat treated, and are harder than the non-turbo exhaust valves.

Which makes some sense as the GT exhaust temperatures are higher than the non-turbo exhaust valves, so you'd want valves which maintain their strength better at higher temperatures.

everyone who has cut the exhaust valves apart has noted that it was significantly more difficult (ie. they when through more cutting wheels) than the intake valves, or the exhaust valves of the non-turbo.

Keep those exhaust temperatures down, and it simply doesn't matter.

But there is no sodium in those valves.

Shame on you for failing to read what I wrote. I have to give you an F- today in your Internet Reading class.

Try again, and come back when you've read it all. I'll re-grade you then.

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Stealth

· #15 · Oct 11, 2008

many lulz for such a simple question

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moebius

· #16 · Oct 14, 2008

Sigh.

I read what you wrote. Yes, technically I accused you of perpetuating a myth which you did not mention, but similarly, technically you are starting another myth that the valves have extra sodium in them.

Why would you assume they have extra sodium in there? --
Why?

Let's put it this way, I'm not metallurgist, but you don't use sodium in steel alloys. It doesn't help with strength, it doesn't help with melting point..

The only way you'd find more than a trace amount of sodium in steel valves is either as a ceramic coating, or inside as a cooling agent.

Suggesting that there is sodium in the valves is just plain silly.

defiler said:
I'm glad someone actually READ what I wrote:tup:

Shame on you for failing to read what I wrote. I have to give you an F- today in your Internet Reading class.

Try again, and come back when you've read it all. I'll re-grade you then.

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moebius

· #17 · Oct 14, 2008

Zach said:
He never said they had sodium in the middle nor sodium filled, just high sodium content. Are you a metallurgist? Have you taken the time to analyze the metal and it's chemical properties?

Am I a metallurgist, no. However, there is no practical reason for there to be sodium in the valves.

Technical defiler is not perpetuating the sodium filled valve myth, but he is starting an equally incorrect one by suggesting that some how there is extra sodium in the valves... which some how makes them different.

There is no supporting evidence that there is any appreciable sodium content in the valves, ergo, defiler is starting a myth.

If you are gonna chastise me, chastise me for mistaking the word "starting" and "perpetuating" ...

I'll be happy to retract my rejection of defilers statement, as soon as defiler retracts his suggestion that there is sodium in the valves, something you ought not do claim, unless proof can be provided.

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defiler

· #18 · Oct 14, 2008 (Edited)

I didnt say there was, or that there may be, I was saying "supposedly" there is, because that's what's been said on here, with no real proof. Thats what the term "supposedly" means. If I had wanted someone to beleive there was sodium in the valves, I would have said there was..

That is IF I had wanted to perpetuate that myth (Which I know isnt true anyways). Which obviously, I didnt.

Dictionary said:
sup·pos·ed·ly [ sə pṓzədlee ]

adverb

Definition:

as people believe: as some people believe, or as people were led to believe
He was supposedly going to pick us up after work.
a supposedly instant remedy

You completely took my comment out of context, when everyone knew what I meant. If you want to bitch and rant, go find a thread on this "myth" and do it there. Dont just look for some glimmer of something and lash out in a thread where it had no purpose of being in.

But back to whatever the fuck it is you have issues with, let's go to an example:

So if my donut is jelly-filled, or has jelly in the center, would that not mean that my donut contains some jelly? Or how would you say it... has a "jelly content"?

Again, you need to brush up on some definitions.

You saw the comment how you wanted to see it and want to pick it apart based on a word that is correct in being there. Your bad interpretation, not my bad usage. If you want to play "Mr. English Teacher", GTFO and do it somewhere else. You're the only one here who doesnt know what was meant by the statement.

I'll be happy to retract my rejection of defilers statement, as soon as defiler retracts his suggestion that there is sodium in the valves, something you ought not do claim, unless proof can be provided.

Read up again. And try and comprehend it correctly this time, as everyone else would read it. Not how you want to twist it to your own views and interpretations.

Suggesting that there is sodium in the valves is just plain silly.

Going on a long rant about absolutely nothing (Other than your misnterpretation) is more than silly....

Am I a metallurgist, no. However, there is no practical reason for there to be sodium in the valves.

But I thought you just said you were not, in fact, a metallurgist. So how would you have any idea on the applications of sodium in metals?

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Legacy

Discussion Starter · #19 · Oct 14, 2008

My question was answered a few posts ago, you can close this thread now, thank you.

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