Okay another question here, does anyone know if the head castings are the same on the TL-P and TL-S?

I know the cams, intake manifold, throttle body and some other things are different, but I wonder if the heads themselves are the same. Anyone here know?

 

Yes the casting on both heads are the same.

 

Damn, its amazing what i started months ago

 

Cool, I kind of figured it might be. This is like the B16 head casting is the same as the Type R, but the Type R is ported and polished. I have thoughts of doing something similar when I get the cams...

 

Is there another post on this? I did a search but didn't see anything. What are you working on?

 

Exactly. That's the difference with the TL-P head and the TL-S. Same but the TL-S has a bowl port just like the type-r

 

I can't visualize how a head looks like. Can anyone post a pic or a link?

 

How can the increased compression ratio on the Type S be explained if the heads are the same?

Putting a "bowl" (machining more from a Type S head) would actually lower the compression ratio.

 

BTW, the Type S heads are different. If you change the pistons you will have to change the heads. You cannot put type s pistons in a regular TL's heads. Different part numbers. I have physically seen both heads.

 

its the port not the head, so it wont lower the compression. also they could make up the compression with a different piston

 

oh and im thinking about pulling my heads off port matching every thing shaving the heads to increase compression ratio and type s cams and tb this winter

 

Of course the piston's have different part number's cause the TL-S pistons are domed. Oh and yes you can put TL-S pistons on a TL-P. It will just raise your compression.

 

A buddy of mine is a tech at Westchester Acura and he has rebuilt a water damged TL-P motor with Type S parts. He said that when they put in the type S pistons in the TL-P head, the motor developed piston slap. When they switched out the heads for Type S heads, the motor ran fine.

 

Piston slap is caused by the bore on the block being to big for the bore size of the piston.

 

Yeah, that i know, having a Trans Am, that is a common Problem. I am going by what he said, since he has done the conversion before.

 

LOL I was at Westchester Acura yesterday... in PA right.

 

I'm thinking that if the head castings are the same, it should work, I haven't actually tried it so I can't speak from experience, but unless the combustion chamber is shaped differently, I don't see why it wouldn't work.