So, there is somebody that has tried to put a these head on a 3.5? I have read that these head have a better flow and bump up the compression. Is it faseble ?? There is some substantial gain to have with these?? Thanks!!


P.S I'm french canadian and I know that i have a bad grammar etc.. but I try

 

first of all, I'm sorry to hear that your canadian...

anyway, i don' think it's possible. different engine and everything. it's almost like putting a 3G 3.5 type-s head on a 3G 3.2 engine block, won't work.

 

The J35 type-s block has a different transmission bolt pattern. Now you can take the internals from the J37 and throw them in your J32 block to make a J36.

 

When was a transmission mentioned

 

3.2 type S heads? where??? 03tl-s?? last time i checked type-s IS the 3.5. your question sounds better if you change the 5 and 2 as in:

3.5 type s head on a 3.2 types block??
So, there is somebody that has tried to put a these head on a 3.2? I have read that these head have a better flow and bump up the compression. Is it faseble ?? There is some substantial gain to have with these?? Thanks!!


Is that your question??

 

I'm not sure about what that mean but I really don't care!

 

Ok! I try again! I ask if a head of a 3.2 type s(2001-2003) can go on a 3.5 type s (2007-2008)?? What I hear is that the 3.2 has a smaller combustion chamber and has conventionnal exhaust port, and a better flow! And I want to know if someone hear have done this??

 

Ok! I try again! I ask if a head of a 3.2 type s(2001-2003) can go on a 3.5 type s block(2007-2008)?? What I hear is that the 3.2 has a smaller combustion chamber and has conventionnal exhaust port, and a better flow! And I want to know if someone hear have done this??

 

I don't understand, what's the point??

 

This sounds like a very good idea. Also a way to be able to install hedders. I've often thought of doing this on my 04, but if I put those heads on my 3.2, I'm going to have 10.5 : 1 compression, then theres the money to. How much would it be to get the car to pass inspection but perform well too. On the 3.5, the compression would probably be more than 11:1 with those heads. Hopefully some other members give their thoughts on this. Sounds like a good idea to me.

 

What's the point of all this?

 

I can't answer if the 3.2 heads will bolt to the 3.5. My guess is yes but I honestly don't know.

However, you don't want more compression than stock unless you plan on running it on race gas. We already have 11:1 compression which is pushing the limits of 91 octane.

I'm not sure how Acura kept compression the same. Either a bigger chamber in the heads with the 3.5 heads or lower compression pistons with the 3.5 to arrive at the same ratio. If this was a race engine and the 3.2 heads have a smaller chamber, it makes sense to use these over the 3.5L heads assuming they flow just as well and you don't mind paying the premium for race gas.

 

The point is, the only mod that we can see hear is bolt-on or supercharge and a few one with turbo, but there is maybe other option for those who wants to get more serious. The j32a2 is the better head of the j-serie it has bigger valve and a better head desind, you can put a real headers on, and thrust me a headers flow much more than a log type manifold like the j35a8. Plus the j32a2 bump the compression I don't know how much but if it's to much, it's possible to play with a head gasket, like the s2000 guy do went they go FI. I see some b-h-d-k-f- serie run has much has 12.5 on pump, so. And I think that the F/IC can tune the timing.

In fact it's just to give and other idea, if someday I have the money I would try this!

 

ahh, cool

 

Regardless of whether you can physically do it, you will never get the kinds of gains from a set of heads as you will a supercharger or turbo. On top of that, the powerband will be shifted higher and assuming you get larger cams to compliment the heads and additional compression, you're talking about a higher strung engine with less low end.

The only thing you *might* look at if you want to run 12.5:1 compression on pump gas is one of the huge cams that are now offered. They will lower effective compression at lower rpms just a little and you may be able to pull it off. Having manual control of the timing maps is a must though. You will have no chance of passing emissions with different heads, no cats bolted to the heads, and off the charts hydrocarbons emissions from the giant cams.

The 3.5L uses a longer stroke with the same bore as the J32. You would be so much better off if Honda offered a larger engine with a larger bore. It would breathe so much better than a J35 with a good set of heads and it would keep piston speeds down at high rpms allowing a higher redline.

 

Just keepin this thing alive.............. On another note I have done this this with a 350 and I used 305 head and cleaned them up just for the shear fact that the cc chamber was smaller and gave me much better compression. with just a mild build we put a 79 malibu in the high 12's with no problem. it was just a good runnin motor granted freak motors are out there. I'm sure there are some Tl's or what have you that just run real good.

 

On j32a.com many member there have done this mod but not with the j35a8, they take others like the j35a3. They make 300+whp

 

believe me when I tell you, that they're not making the power because the heads flow better.
I'd love to chime in with every reason why there's no good point in this, but when I do, it always leads to arguments, because somehow ppl don't accept anything other than the beliefs they've planted in their heads. So i keep my mouth shut

 

I wish I had this talent, it would save me (and the moderators) so much headache.

 

that is sad...

a healthy debate is always good as we try to improve the knowledge base of our members, but i can see where it turns into arguements when you have fanboys who have been sold on incorrect knowledge want to jump all over you for saying something they don't like...

sucks but that is life i guess...

 

Ok men if you react like that, it was just to give an idea no need to be mad. Breath and enjoy the life, I don't want to jump over anybody. No need too feel attack. Rest in peace!

 

What needs to be done is flow numbers on each head to determine if there is a difference in flow. We need actual CCs of the head volume to determine compression. Just because you can run a true header on the early heads doen't mean you can make more power with them. The later heads may merge exhaust together very well internally, as well as headers on the early heads.

The only valid test would be the new heads with PCDs vs old heads with headers and a dyno for each with no other changes.

 

I think buddy was being ignorant to either you being canadian or french who know who cares.

I have a few J35Z3 blocks here im gonna try to slap on some J32A2 heads on it. I would love to make 300whp .

 

Take the j35 heads, get them ported and polished. Take the intake manifold, do the same thing.

Has it ever been done before? No idea. But that will yield way more power than swapping heads.

 

Problem with the j35 heads are the 3 into 1 combined exhaust post and the 3.2 has individual ports. I'll take pics tonight of the j35z3 heads I have they realy cramp up in the exhaust port. Only way to port them would be to extrude hone them.

 

I'm assuming you can still do bowl work with the valves out which will be a large part of your gains. Is there no way to get the the exhaust ports with a long tool?

 

Yes you can do the bowl work from the combustion chamber side. But the exhaust port side is about 5" deep I'll take a pic tonight. And the design is supper tight on the outside ports.

 

I agree. You start cuttin out metal with no numbers.... You will feel the pain if it doesnt go right and you lose. Bench numbers are very important. You think Acura put those heads on theses car without atleast 90 percent optimal flow? Cuttin the seats is a good place to start. Talk to a local head shop.

 

How could the 3.7 internals fit and which parts would you need to make it a 3.6 because im trying to build my 3.2 with out swapping ?