Ok so I have a skunk2 pro manifold for my gsr that i am thinking about keeping if i cant get a performer x. any modifications that you guys would recommend? maybe smooth out the runners with sand paper or get the runners ported? i dont need to port match since the head is stock. i was thinking about port matching it to my jdm itr tb. but i read about an anti-reversion step where you bore the manifold 4mm over the tb bore and its suppose to increase hp. any truth to that? any suggestions will be appreciated.

 

the skunk2 is 64mm at the opening so it shouldn't need to be "matched" to the ITR 62mm throttle body

 

Reversion is usually referring to the exhaust side, where spent exhaust gasses can re-enter the combustion chamber and dilute the charge. On the intake side, everything is fresh air, so I'm not sure what you'd be trying to fight. Up for info, though.

 

according to my itr tb and oem gasket the opening the the manifold is slightly smaller

https://honda-tech.com/forums/all-motor-naturally-aspirated-44/70mm-tb-am-i-losing-power-2564040/ post #15 and on

 

just wondering about what mods are beneficial because i read donf say something about him never using them as they come. he never answers pm's so i wanted to see if anybody knows exactly what to modify.

 

I find it ironic that you don't feel a need to port match the ports to a stock head, yet you feel it's important to port match the Tb opening to a stock ITR TB. You have a lot to learn.

 

for everything to work its best, its a good idea to port match the TB, clean the runners up of any imperfections and to port match the Intake manifold to the head, Its not hard and if your swaping it all you might as well do it all then. Id also get a hondata IM gasket as your going to need a new one anyways.

 

my head is unported so thats what i meant about not having to port match the manifold since they are both unported. but your right i have alot to learn thats why i am here to learn. btw if you anything to contribute about my original topic that would be great .

 

Since you can't comprehend the "contribution" of my original post, I'll spoon feed you. Ask yourself these questions:
Why is it worth port matching an IM to a TB?
Does a stock head's ports match up perfectly to the the IM ports?
What will happen if a head's port is smaller in diameter than an IM's port?
Will the affect be similar to what will happen if an IM entry port is smaller in diameter than a TB port?

 

port match the intake side to the gasket, leave the intake manifold alone, if your using an ITR TB, leave the opening alone

 

honestly if your going to reply on my thread like this please dont reply. you dont have to be an expletive about it. I will check to see if the ports "match" i just though that if the head was unported there is no use in port matching the manifold since they should be the same size. like i said i am on here to learn as much as possible and i dont need your negativity.

 

so far 10 post and no real help....

 

What are you, like 12? all-mtr-teg, namewasdallas and 1.5slowmatic all gave you great answers. Since you're obviously slow to understand here it is in plain English
If you plan on using a stock ITR TB (62mm) don't bother porting the S2 TB port. If you want to maximize the gains from the IM swap, port match the runners to the head, even if the head isn't fully ported.
You get it now?

 

fixed.

 

S2 IM are not nicely finish and well matched port sa a stock one.
It need to be matched
*We say since long time,
S2 Pro-serie IM is called Pro serie cause it need to be see by a PRO before you install it LOL

 

port matching the intake to the head will get you the most peak HP, but are you shooting for that or more umph on the street in the low-mid range area?

 

really? nobody has answered my question about the anti-reversion step. all i see is people with big ego's telling me the generic answers.

 

yeah, apparently that is all you can see, since everyone is giving you good advice, but you just don't want to take it.

 

HAHAHA.. All I did was port match my 68mm Skunk2 TB gasket to the manifold, and matched the intake ports to the Hondata IM gasket. That's It.. that's all that's needed. Anti-reversion work is just not necessary. that relates to exhaust gases re-entering the intake air.

Skunk2 did all the work needed for it. Don't overthink this.. it'll just cause headaches for yourself

 

what did u use to port yours shodan i did mine with a dremel , tungsten bit and then sanded it with a semi rough peice on the dremel but yours looks silky smooth i did the same thing i put my hondata gasket on the head marked wit with a marker where it needed a tad bit of matching then sanded the gasket then put gasket on the mani and marked the mani with a marker. As for the tbody i held the plate open and marjed that with a marker then kinda hit it off with the tungsten bit then cleaned it up took about 3 and a hafe hours not bein **** with it

 

Im guessing he finished it off with a cartridge roll. That's how mines look when I'm done.

 

when you port match the manifold to the gasket how deep do you open up the manifold? or am i opening just the very begining? btw thanks for your reply these others guys are real ignorant.

 

that's about it. My machine shop used it when i gave them that and the TB Gasket as a template of the diameter size of the opening. they did the same on the intake runner openings when matching to the Hondata IM gasket. I really didn't need to have to go that deep.

 

i only went about a inche maybe a tad over a inch in i wasnt going all crazy with it .. i did it in my bedroom at 630am when i got home from work

 

i will be sending my 60mm tb to maxbore to get it bored to 64mm at the plate with 67mm taper