I've done a lot of porting and polishing on f/i engines, but I'm new to n/a. I was thinking about porting my stock intake manifold as opposed to buying a skunk2.

Has anyone else tried this? I bet you can make enough of a gain at the cost of a few die grinder bits that a skunk2 is pointless... but I haven't looked too close at the stock manifold, is there enough room for improvement?

 

yes you should open that manifold up it will deffinitly alow more air into the engine

 

Your stock manifold will do all you want it to w/o being ported in a NA application. All it will really help is throttle responce and maybe give a slight hop(not jump) in mid range tq.

 

Interesting... then why are people dumping so much money into those skunk units?

I do plan on getting a larger throttle body though, I need a snappier throttle.

 

Most of the porting I've done had been on forced induction engines, like my laser race car or the dodge I used to have... I did some porting on the monte race car (406) but it was minimal.

I know that N/A engines are a lot less forgiving. When I ported for forced induction, I actually left the walls rough on purpose because it got the air tumbling better.

So on the intake manifold, should I polish it smooth and just make all the runners smooth and even? I would just port match it to the size of the runners in the head and smooth it out basically...

 

People dump that money on them because they are mis informed and do not know how good a stock honda intake manifold actually is. On the porting I have allways been of the mind that you port but not polish so that there is some what of a rough surface to atomize the fuel into the air.

 

Yeah, I heard that the 99-00 Y8 manifold was one of hondas best. PLus all the horror stories people had with Skunk 2's manifold it just don't seem worth it. I have to get mine p & p basically, cause the HX was quite small compared to the EX and such. I would just switch it for the Y8 Manifold but the HX has the damn EGR valve and if I were to switch it I would throw a check engine light. But yeah, I'd stick with just the Y8.

 

What is the most popular throttle body size for an upgrade on the y8? I hear a lot about the 62mm... can you get those off a donor car or does it need to be an aftermarket unit.

Will my aem v2 hook up to the larger throttle body?

 

I'd say go with between 60-62 mm. You can either get your throttle body bored out, or buy an aftermarket one. Yes, the intake will fit.

I also hear that B series throttle bodies are interchangable, but I could be wrong.

 

all honda I4 TBs are interchangeable.

i agree with marty. you wont get much of a gain anywhere but throttle response. like he said...not many people are aware of how good stock honda manifolds are...both intake and exhaust.