Port my 2G o2 housing or get a EVOIII?

stevo · Sep 26, 2002

Well, I am getting my turbo back put on next week and was thinking about my o2 housing.

I know the evoIII is a good size bigger than the 2g housing. My plans for my car are to hit a high 11 sec with a street setup.

I am thinking the 2g ported will be plenty big enough for me, i plan to get either the big28 or l2r turbo (probally the l2r).

Any opinions and suggestions are appreciated.

Blackboost · Sep 26, 2002

Just port your 2g O2...

RippinGSX · Sep 27, 2002

They are about the same size but the advantage of the 2g over the EVO is the angle the DP attachs at

The 2g will take more portwork than the EVO on the other side. Stick with the 2g if you already have it

stevo · Sep 27, 2002

Thanks for the help...just seems like it would be easier for the 3" dp to fit on the evo housing (i think the flange to the dp is bigger?)

How am I supposed to fit a 3" pipe onto the flange that is on there already? or am I supposed to start at say 2.5" and then flex to 3" right after the flange?

Blackboost · Sep 27, 2002

If you go with the EVO O2 you can start with 3" right from the flange...

RippinGSX · Sep 27, 2002

A 3" will work on a 2g housing but it will require much more portwork. The main advantage will still be the exit angle so it's a trade off. More portwork or cut off the flange on the DP and reweld your DP angle.

stevo · Sep 28, 2002

Imma just save my money and just port the hell out of my stock housing and just figure it out as I go along... Thanks again.

dsmawdturbo · Sep 29, 2002

hey you said u can out a 3 inch up to the evo housing. The flanges u get form rre is a 2.5 do u need to port it for it to fit the 3 inch. You made it sound like you could just slap on the 3inch downpipe without doing anything.

Blackboost · Sep 29, 2002

dsmawdturbo said:
hey you said u can out a 3 inch up to the evo housing. The flanges u get form rre is a 2.5 do u need to port it for it to fit the 3 inch. You made it sound like you could just slap on the 3inch downpipe without doing anything.

http://www.roadraceengineering.com/newproducts.htm

Look for the info on the EVO O2 Housing. Then read the part where it mentions the custom 3" downpipe...

RippinGSX · Sep 30, 2002

You will need to port it to match 3"

am00re34 · Sep 30, 2002

porting the evo o2 housing is really easy and quick. i dont know what its made of, but a few hours and your done. the exhaust mani took much much longer! and also can anyone give me a site that i can find nice carbide bits cause the ones i have go to sh*t pretty quick

dsmawdturbo · Sep 30, 2002

cool thanks I figured as much .Im working on putting it in right now ill be running no exhaust for a day or so

untill the guy makes me one.

RippinGSX · Sep 30, 2002

am00re34 said:
porting the evo o2 housing is really easy and quick. i dont know what its made of, but a few hours and your done. the exhaust mani took much much longer! and also can anyone give me a site that i can find nice carbide bits cause the ones i have go to sh*t pretty quick

www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=38686

This is the bit I used to do all my portwork and it hardly wore down at all. Industrial strength man

stevo · Sep 30, 2002

RippinGSX said:
www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=38686

This is the bit I used to do all my portwork and it hardly wore down at all. Industrial strength man

How much work did you get out of this bit? It it strong enough to port my exhaust manifold and my o2 housing? What bit did you use to smooth it out?

RippinGSX · Oct 1, 2002

I did all my portwork with the one bit and the finish was smooth at the end using that bit. Keep moving, that's the key.

stevo · Oct 1, 2002

That bit got it really smooth? I thought you needed a finer bit to make it really slick..

RippinGSX · Oct 1, 2002

Smooth as silk man

stevo · Oct 1, 2002

Thanks...

Think one bit can do two manifolds and two o2 housings? Or ya think I would need two?

RippinGSX · Oct 1, 2002

I got 2 of them but only ended up using one with minimal wear in the end. I did my turbine housing and wastegate hole, manifold and O2 sensor housing and compressor outlet to match up to my new J pipe and I'm sure I could have done more. Hell, for $13 each you might as well get 2

stevo · Oct 1, 2002

Damn, you went port crazy...

Yeah that is true..$13 a pop isnt bad at all....

Port my 2G o2 housing or get a EVOIII?

stevo

Blackboost

RippinGSX

stevo

Blackboost

RippinGSX

stevo

dsmawdturbo

Blackboost

RippinGSX

am00re34

dsmawdturbo

RippinGSX

stevo

RippinGSX

stevo

RippinGSX

stevo

RippinGSX

stevo

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