invidia catless down pipe test pipe combo

[MikeW-RRE]

"O2"... derives from "O2 Housing" which derives from that on the DSM and EVO 8/9 the Oxygen Sensor was bolted into the cast steel turbine outlet piece of the turbo. The part that takes the exit air coming out of the turbo and makes it make a 90 degree turn downward. One side of an "O2 housing" bolts to the turbine housing of the turbo, the other side bolts to the down pipe. So in internets jargon it somehow turns into an O2 down pipe when you get a big long one piece down pipe that replaces the down pipe and O2 housing all at once.

On the EVO X and RalliArt, the oxygen sensor actually screws into the down pipe. Not the cast turbine outlet piece. You have no O2 housing that can be called an "O2" by further shortening the name :-/

Now... since the turbine housing of the RalliArt has a different bolt pattern than the EVO X, any of the EVO X long, wide mouth, one piece, O2 Eliminator down pipes will not bolt to a RalliArt turbo. You will see none listed for them. If you did put an EVO X turbo on your RalliArt, then you could use an AMS style long DP. I dont see the gains to be worth the cost involved with a long DP on a stock EVO X turbo. But they are pretty much a necessity on an upgraded larger than an EVO X stock turbo.

If it was me (and it has been me :-) ) then i would do it like this:

Stock RalliArt turbo - stock cat and stock DP
EVO X Turbo - Short DP and high flow cat or no cat (for the track of course)
FP Red/BBX/Garrett 3076 etc - AMS Long DP and a 100 cell metalic core cat or no cat.

For the EVO X turbo, you had better have really good tranny cooling. For the last option you need some serious clutch upgrades too.

Mike W

[ralli_kid]

Well I just got an evo x turbo for 200 of evoxforums..... and right now with the mods I have I am pushing 240 whp and this is just with an upograded intercooler, ic piping(not upper yet only lower), cat back exhaust, ams boost pill, and UR intake.

Now my question is how much more power will I get with an evo x turbo and then adding a down pipe and high flow cat?


I do plan on going up to the bbk later next year so i think I will hold off on the downpipe O2 combo until then....

what down pipe and test(or high flow cat) do u recommend for now?

[zeRep85]

Originally Posted by ralli_kid

Well I just got an evo x turbo for 200 of evoxforums....DAMN CHEAP! How old? Or how many mileage?.

Now my question is how much more power will I get with an evo x turbo and then adding a down pipe and high flow cat?

I do plan on going up to the bbk later next year so i think I will hold off on the downpipe O2 combo until then....

what down pipe and test(or high flow cat) do u recommend for now?

The majority of the power will come from the turbo, the DP and Cat (or lack there of) will only help the exhausts flow faster resulting in a faster spool.

Mike's Ralliart with an Evo X made 300 whp according to his post w/ stock DP and stock cat.

Correct me if im wrong..

Also, dude! BBK turbo! You daily drive this beeeotch? My ultimate goal is 300 whp DAILY driver.

[ralli_kid]

but what mods does mike have on his????


ayeah i daily drive it when i feel like it. i switch off this car and the truck

[zeRep85]

^oil coolers galore!

lol

[MikeW-RRE]

Progress Springs
Whiteline Rear Sway Bar
Volk RE-31 18x9.5
Bridgestone Potenza RE11 265x35x18
Stoptech Brake Pads
RRE SS Brake Lines

RRE 24" FMIC
RRE Upper and Lower I/C Pipes
EVO X BOV
Stock Intake Box

EVO X Turbo
MXP Tubular Exhaust Manifold
Stock DP and Cat
2.75" Cat Back Exhaust

RRE Engine Oil Cooler
RRE Dual Tranny Coolers
Removed Fog Lights for more air flow
Cut air flow slots into the bumper cover and reinforcement

The car is usually at the shop in the evenings. Stop by between 6 pm and 9 pm when traffic is less and I can take you for a ride to see what it feels like.
Just e-mail first. [email protected]

Mike W

[E46byeRAhi]

mike --- you are the best. very good insight into the DP/cat topic for stock turbo RA owners.

[ralli_kid]

Originally Posted by MikeW-RRE

Progress Springs
Whiteline Rear Sway Bar
Volk RE-31 18x9.5
Bridgestone Potenza RE11 265x35x18
Stoptech Brake Pads
RRE SS Brake Lines

RRE 24" FMIC
RRE Upper and Lower I/C Pipes
EVO X BOV
Stock Intake Box

EVO X Turbo
MXP Tubular Exhaust Manifold
Stock DP and Cat
2.75" Cat Back Exhaust

RRE Engine Oil Cooler
RRE Dual Tranny Coolers
Removed Fog Lights for more air flow
Cut air flow slots into the bumper cover and reinforcement

The car is usually at the shop in the evenings. Stop by between 6 pm and 9 pm when traffic is less and I can take you for a ride to see what it feels like.
Just e-mail first. [email protected]

Mike W

Mike you answered my other thread in this one hahaha I guess I am going 18x9.5.... did u have to roll your fenders like crazy or what???


and about the intercooler piping I am in need of an upper one badly I got everything else except the upper and the mxp tubular exhaust manifold....

Now with that said... do you see getting any more power out of the car if u added a downpipe with a high flow cat? I know a downpipe wont make much difference with a stock evo x turbo until u uprgrade. but what about with the bbk or something better than the evo x turbo?

[MikeW-RRE]

With these mods, yet with a stock cat and DP on a X MR, I can usually get another 10 whp. I hear that the RalliArt cams are different. I suspect that is where the missing potential power is from. I might try a HFC one day before that. BBX or bigger, maybe when I am ready to try to fit a 5 speed manual tranny in it.

MRs I have driven with Biggee turbos and cams tend to lose the fine driveability that is what you bought the MR for.

------

For the front fenders to clear, you get two bug guys and pull hard on the frnder lip. It opens up the gap at the rear bottom fender to the door. If you go nuts pulling (like I did) then you get the slightest kink on the sharp body line to the wheel arch curve.

In the rear, used a notmal fender roller tool to the max. No heroic measures though, didny get out the rally hammer or anything. These are a 35 offset. If they were set inwards a little then you need to do a little grinding on the rear trailing arm. But they would clear the fender lips a little better.





Mike W

[ralli_kid]

So do the wheels sit flush with the fenders or no????

But with that much power dont we need a new clutch????

I dont know of anyone making an aftermarket one for the ralliart yet either =(