earlhly

I have a base 2005 TL I'm thinking about putting Type S heads on it . Has anyone ever herd/performed this application is so could you guys give me some advise On the install , where I could find the heads , and any other tips that could help me

justnspace

iTrader: (1)

https://acurazine.com/forums/problem...32-j37-915065/

mzilvar

iTrader: (3)

There's a set in the blackmarket that are ported & polished already with titanium springs and retainers.

There's also a set of J37A1 heads there with the intake runners that will be needed if you put the J37 heads on the car. The intake port design is different on the J37 as well as the exhaust flanges so you'd need different flanges on your precats and you'd need the lower runners as well.

The J35A8 (Type-S engine) has the same exhaust flanges as your J32A3, it also uses the same lower runners.

The major difference between the J35A8 & J32A3 is the J35A8 flows better, and has 36mm intake valves, whereas the J32A3 heads have 35mm intake valves.

Camshafts are different too, while your J32A3 cams would fit in J35A8 heads the profile is different. The J32A3 has different profiles on the non-VTEC lobes, so one intake valve is open more than the other during the intake stroke. This causes the intake charge to swirl in the cylinder and promotes better mixing of the air/fuel charge.

The J35A8 (Type-S cams) eliminated this altogether and has both intake valves open at the same rate during the non-VTEC intake stroke.

If you do the heads, might as well do the cams too

Go to forums --> Black Market --> Car Parts for Sale

earlhly

So which would you recommend the j37 or the j35 performance wise?
Also does anyone have videos of cam and head install because I never did one .

mzilvar

iTrader: (3)

I couldn't tell you. The j35a8 may be a little more straight forward given you can use your existing pre cats.

It's a big job may want to reconsider if you're not very familiar with the car.

screaminz28

iTrader: (1)

Are you sure the J37A1 heads (aren't these the same as what Justn used, from an MDX?) have a different exhaust flange? I thought they were a direct bolt on. There are also a couple other guys with J37 heads on AV6s and I didn't think they had changed their pre-cats.

RV6's website also lists the same Pre-cat delete part for all TLs 04 -08 and MDXs 03 - 09.

Did they have a mix of different A1 heads available?

anx1300c

iTrader: (2)

So you want to swap heads solely for a power increase? What other mods do you currently have? Heads/cams should be the last area you look for more power. That said, in a direct swap, cams included, I'd guess most gains will come from the cams, not the heads. Didn't Yungone speculate the J37 heads will probably hurt power on the J32? And Accord 325 (?) actually didn't gain any power on the J30 and is going back to ported stock heads I believe.

OP, if all the standard power adders are in place (exhaust from heads to bumper, pulley, 3.7 manifold, TB, ported runners, 3.5-4" CAI, Flashpro if you're 6mt), only then would I consider head work. Although I think a cam swap and maybe a 5 angle valve job on the stock heads would yield the best results.

mzilvar

iTrader: (3)

Could well be correct, not sure which flange they are. I know the ones in BM say you need the 8G accord pre-cats, but you might be right they might be the 3G TL flanges.

I think justn did use the J37A1 heads and looked like he used his old PCDs which have the 3G flanges.

kingkong_dav

Swap the block for type s, keep ur head n add type s cams

Sonnick

The J37a1 from the 07-09 MDX utilize the same PCDs as the J30/J32 & TL Type S. The 2010+ MDX heads (the heads I have that are currently in the BM) use the 8G Accord Precats, I verified this last night when I tried putting my stock Precats on them and the top 2 bolts did not line up.

In terms of these heads losing power on the J32, it could be possible, I don't know. No one has used the newest J37a1 heads on another motor yet that I've seen. All I know is the cams are more aggressive and the valvetrain is stronger than the previous J37a1. Other than that, I have no knowledge on how these heads will perform on a J32. They are the same bore though, @ ~89mm. The problem with the J30 is that it's 86mm and throwing the 89mm heads on top created an overhang. But again, I don't know how they will perform.

But OP, if you haven't done any mods this is the last thing you should do. Listen to anx.

justnspace

iTrader: (1)

I had never done the swap before and look at me!
My car is up and running with NO CHECK ENGINE LIGHTS!
yay!