Q about boring out intake manifold..

[chris929]

Hey i've been searching and haven't been able to find anything but what is the max diameter that the stock intake manifold's thorttle body port can be bored out to?

[Matrixloader]

Carbonman may know this, he can also port and polish it for you.http://compactdivisions.com/catalog/product_info.php?products_id=82
i'd say go stage 1 if your staying N/A with the TB bored at 58mm

[slow 2K2GT]

Chris is already F/I, he runs an upgraded Alpine kit with a 13g turbo I believe.

[chris929]

ya sorry i guess this shoulda been a f/i thread but w/e...the compactdivisions manifold wont work for what im planning but thanks.

[Cypher]

the max is about 58mm, unless of course I'm thinking about the TB itself.

What I recommend, if you have the ability, is to take the stock manifold and cut it 3 times. Cut it right after the flange, cut the runners, and cut the "collector" as well. This way you can take and modify all parts of the intake manifold. Of course, you must know how to weld alumimum to do this but this would be the best way to go about it.

[RotaMan99]

I forget what its called but they run an aggresive mud through the manifold to bore it out. Crap, I went to their site to not that long ago if only I could remember what the process was called...

edit, I remember Extrude Hone. $500 for our manifold.
Here is the site.
http://www.gethoned.com/parts.php?get_price=yourparts&show=automotive

[Matrixloader]

what about the Kspec Air Ram intake manifold? The throttle body opening is 68mm. here is the link: http://kspec.com/list.php?ac_id=68&ai_id=657
http://www.kspec.com/img/item/658_l.jpg

[RotaMan99]

Sexy!

I think you may get uneven air flows in that manifold. Maybe not though. Im just looking at how its tapered. I have heard mixed messages on the net about stuff like that. Im no expert. Although their description says equal air distribution so what do i know... lol

I would get it though! :)

I think the best thing about that manifold is that its FREE!! Atleast they havn't entered a price for it yet :)

[Matrixloader]

there are some members here that have it, there was a group buy on this going on a while back.

you may need to contact Kspec to find out how to order one.

mayollo072R is one member that has it on his ride. I would pm him if you have any Q's about performance.
http://www.elantraxd.com/photopost/data/500/MyelantraPics2024.jpg

[Cypher]

That manifold is no longer made. Its $0 because they don't have it anymore.

[KeWLKaT]

The MAIN ISSUE it this:

The IAC port on the manifold is already very close to the edge of the inlet port. With it bored out at 58mm, there is already only about 2mm worth of metal seperating the two. I would say 59mm is pretty much the maximum you can port it to.

Unless you have a CVVT engine, which means the IAC port is on top in that extra hump you guys have. If this is the case, I have not looked at it to see how much more meat you have to play with before you go piercing into the IAC passage.

[chris929]

The MAIN ISSUE it this:

The IAC port on the manifold is already very close to the edge of the inlet port. With it bored out at 58mm, there is already only about 2mm worth of metal seperating the two. I would say 59mm is pretty much the maximum you can port it to.

Unless you have a CVVT engine, which means the IAC port is on top in that extra hump you guys have. If this is the case, I have not looked at it to see how much more meat you have to play with before you go piercing into the IAC passage.

Thanks this is what I was looking for.

[Denisst99]

i have a CVVT manifold at the shop
i'll get a look at it

[dmdicks]

I bored out my manifold to right up to the IAC port opening. It was exactly 60mm.

[KeWLKaT]

I bored out my manifold to right up to the IAC port opening. It was exactly 60mm.

On a CVVT?

[Denisst99]

61mm looks like doable,
it's gonna be tight

[Jonny666]

There are 65mm throttle bodies available so i would assume you would have to relocate the Idle air valve tis all, then bore to your hearts content.