The heads I put on my car were from a 93 coupe, a Type II, they were stamped with PY3. AM guessing they just got stamped with that for some reason.

 

Very, very sweet AcidFire52.

This is the exact response i'm looking for from this tread. To build a strong case for this fact I need more to reply with the same.

So if you've experienced this same stamping on your type II head, fill me in. It would also be nice to know if there is a difference or reason for the difference.

Thanks again acidfire52

 

I would like to know any differences too. After I put on the heads and a type II intake, she ran ok, but hesitated with the Type I FPR and ECU. Once I swapped them over, she ran good, not great, but good. I hopping the heads really were Type IIs.

 

I was just told yesterday that you can put a TypeII intake with TypeI heads and not have a problem, you would open up more at top end without sacrificing low end tq. If you put on TypeII heads and intake I would think you would have to put TypeII FPR and ECU. Good luck

 

I believe that the only major differnece in the heads are the cam shaft lobe heights and a spring with a sealing valve that goes on the end of the rocker arm oil tube(typeII does not have these).

 

When I said "Once I swapped them over" I meant I swapped them for Type II. My car should be fully a Type II now, just not 100% about the heads because of the stamp.

 

Got you, you meant that you swapped the FPR & ECU. I have a TypeI coupe that is the car I utilize and also have a non-running 95' coupe. I swapped the tranny(out of neccesity) and plan to swap the intake & exhaust(convert to typeII). I'm gonna have the typeII ecu chipped to run with the typeI head specs. I should end up having pretty decent gains with minimal work and $, I can't wait. Have you ever thought of doing the electronic steering column swap? It take a little bit of money and even more work but I like it much better, just a thought.

 

same here I just took apart a 94 type II engine and it is stamped py3.

 

Hmmm... Interesting... I bought my car from someone they had paperwork saying that the engine currently inside it was swapped in with a JDM one.. it doesn't have a type II stamp but I was wondering how would I check if it's a type2 engine.. i feel stupid =[ just wondering because my legend tends to kill everyone elses =[

 

Where are you guys seeing these PY3 stamps on the heads?

I have Y3-R and Y3-L on all three my heads middle runner(2 T2 & 1 T1).

The only distingishable place PX9 appers on a T2 is on the top back right of the intake manifold. Versus PY3 on a T1 I man.

Dont get me wrong, the T2's are superior, but I too am now tring to find a way to tell them apart. Valvetrain, cams, port sizes. ETC.

~Dv8

 

I haven't done real indepth research but what little I have found is that the heads are mostly similar. The cam-shaft just seem to be different(typeII lobes Are larger), also the typeI has an oil valve and spring located on the ends of either rocker arm oil tubes(I believe typeII does not have this either). Everything else I believe are the same.

 

I did some more investigative work and found the PY3 stamp at the exhaust manifold side.

What I noticed is that my T2 heads has a "Y" and a "B" off to the side of the PY3 -R or L

While

The T1 heads reads "2" & "C"

Both heads have a "2" above PY3.

Whats everyone else have?

~Dv8

 

That is what I have also I was looking at the exhaust manny side and saw the PY3 but on the inner part of the head there is the Y3-L or R

 

That is what I have also I was looking at the exhaust manny side and saw the PY3 but on the inner part of the head there is the Y3-L or R

You have a 7 there what about next to it?

Those are T1 or T2?

~Dv8

 

mines a 95 l coupe heres the head (kinda hard to read sorry)

_2
PY3-R and a circled 7 and a circled "8" or "B"

definately should be TII though...

i dont have a good pic of my intake manifold.... but i do believe it said PX-9

 

I'll post the pictures tonight from the heads I bought from andwhat03. So far I don't think they look like any posted.

 

Type II cams have 2 grooves around the ends of them

Type I cams have 1 groove.

 

Thats the heads. Whats everyones thoughts?

 

Ok I have to ask. for type 1 heads are the intake valves bigger then the exhaust?

If not then if the type 2 heads have bigger valves then all you need to do is look at the valve size right?

Moistical can you possibly get pics of your valves on the type 2 heads. Anyone have a valve pic of the type 1 heads?

 

Lets not get in to this...the differences between the two types of heads is well documented all over this forum all you have to do is search. What youre asking means you havnt searched well enough.

Lets simply find a way to tell if a head is T1 or T2 by way of marking. Someone could take an intake valve diameter measurement and compare to shop manual data. Since the T2 has 1mm bigger intake valves it should check. However if people cant use the search feature I doubt they can use a caliper tool.....

Using what Blkonblk mentioned about camshaft:

Type II cams have 2 grooves around the ends of them

Type I cams have 1 groove.

I can snap shots of a T2 camshaft, does anyone have a T1 they can take pics of?

~Dv8

 

u arent going to be able to see 1mm difference especially if you dont have both heads to compare.. blkonblkcpe has the best way id say

 

Shop manual data vs. Actual digital caliper measurement will work. I just might not trust the person measuring.

~Dv8

 

Hmm if you gys don't know by tomorrow shoot me a PM I have a set of TI heads and a digital caliper in the garage but I am off to bed right now and shipped my TI cams off

 

I have my Type Is sitting at home. I can snap a pic later tonight. Am glad to see my heads were Type IIs.

 

T1 are still in the engine. no dice here:thumbsdow

 

Well come on everyone lets post the information that will truely show they are type 2's. Because our search doesn't give great reasons. Besides the px9 which isn't on the heads.

Do the numbers on my head mean anything? Like 6 and 8 then in one spot it says 59?

 

As for the valves, I THINK type II intake valves are like 34.1mm, cause the type I's are 32.9-33.1 mm. SO the type II's should be 1 mm larger correct???????:headscrat :bootyshak

AND, I THINK this camshaft end will have two grooves on it for type II, and only one for type I.....

Or? Is it the rear end of the cam?:headscrat :dunno: :dunno: :dunno:

 

bump for telion

 

*2
PY3-R (7) (B)

vs.

*3
PY3-R (6) (A)

that would be the way to tell, methinks. problem is, theyre both supposed to be type 2 :nutkick: