This completely disagrees with every other vendor. Everyone else said the regular downpipe upgrade provided zero gains and gains were had in the o2.

I wouldn't believe perrin on this one unfortunately.

 

Chris, why don't you include another O2 bung in the downpipe? One for the stock location and another for a wideband?

Or at least have it as an upgrade option on the site?

 

I'll get it added sir

 

Maybe Perrin will see this and chime in. There's a few reason why this could be the case.

1. The Perrin downpipe makes HP and adding the O2 housing didn't improve it any. For some reason the other vendor's couldn't get any HP out of a regular downpipe but Perrin could.
2. Perrin's prototype with an O2 housing had a design flaw which is why it didn't make any more power than the others.
3. Perrin is lying.

I haven't been around here long enough nor know Perrin well enough to comment on either. They seem like a reputable vendor so I really doubt they are lying so possibly they found a way to get HP with a regular downpipe or else their O2 downpipe prototype was flawed in some way.

Nevertheless I will be buying their full TBE because it seems to be the best bang for the buck. And if I buy the Cobb AP from them first I get Perrin maps as well as a coupon for 15% off my next purchase, which makes my TBE about $200 cheaper than normal.

Additionally, if you look at Ultimate Racing's site, they compare their regular downpipe versus their O2 downpipe:

Catback + Intake + Test Pipe + Downpipe
Max Horsepower: 320.38 whp
Max Torque: 327.14 ft.lbs

Catback + Intake + Test Pipe + Long Downpipe
Max Horsepower: 322.42 whp
Max Torque: 330.24 ft.lbs

So 2HP and 3TQ increase is basically nothing. It's possible that Perrin saw something similar with their designs and didn't think it was worth a couple hundred dollars for 2-3HP.

 

Aside from the overall hardware ETS vs AMS the 2 MAJOR differences in Stage 3 and Stage 4 below was the MXP o2 housing vs the ETS FULL Downpipe and the AMS Test Pipe vs the ETS Hi-Flow Cat. In the end I gained 18WHP and 39WTQ

Stage 1 - 309AWHP292AWTQ with HKS-Drop-In only
Stage 2 - 318AWHP/303AWTQ with HKS Drop-In/AMS FMIC/AMS TP/Buschur Cross Flow CBE
Stage 3 - 312AHWP/295AWTQ with HKS Drop-In/AMS FMIC/AMS TP/Buschur Cross Flow CBE/AMS Intake/AMS UICP/MXP Downpipe
Stage 4 - 330AWHP/334AWTQ with AEM CAI/ETS FMIC/ETS UICP/ETS LICP/ETS HFC w/ CEL Fix/ETS Downpipe/Buschur Cross Flow CBE

 

You have a LOT of variations between stage 3 (which somehow has both a drop-in filter and an intake) and 4. Also all of your numbers seem to be a bit high in every stage. Were these runs tuned or untuned?

 

typo:

Stage 3 - 312AHWP/295AWTQ with AMS FMIC/AMS TP/Buschur Cross Flow CBE/AMS Intake/AMS UICP/MXP Downpipe
Stage 4 - 330AWHP/334AWTQ with AEM CAI/ETS FMIC/ETS UICP/ETS LICP/ETS HFC w/ CEL Fix/ETS Downpipe/Buschur Cross Flow CBE

These #'s are from a retune on the same dyno each time the configuration was changed. Again the major difference aside from the manufacturer of the parts is
the

MXP downpipe - http://www.evasivemotorsports.com/Me...pipe_evo_x.jpg

vs

ETS Downpipe - http://www.extremeturbosystems.com/p...=18256&image=0

for a gain of 18WHP/39WTQ not to mention that the ETS FMIC was 3" vs the 3.5" AMS FMIC

 

It's hard to believe you got 39WTQ from a different downpipe. It sounds more likely that the tunes are not comparable or a lot of parts in stage 3 were junk.

 

Understood. As far as the tune it was the same Dyno, same boost, similar air temp etc. All I can say is after trying a few different combinations of parts I finally found what works best with my Evo X MR.

 

Koach,

Sorry to chime in so late here. The response was actually wrong! (not one of your 3 options! LOL) The person that responded to you somehow mixed up what really happened. We actually didn't test a new O2 housing, because from what we could see with the new housing, it didn't look like it would make too much of a difference, and we've heard from other shops was that it didn't make too much of a difference either. It is something that we might devolop in the future if there's enough interest, and if it's proven to actually make a difference!

 

This is what i thought i heard before, so good to know.

I can see why people wouldn't think a new o2 would make too much power since the stock one is pretty free flowing, but better to have and not need, so i will get one seeing as how AMS showed gains so I am sure it is a worthwhile mod, they are pretty trust worthy.

 

looky what i got!!!! should be fitted and tested by next week.

amazing quality , fast shipping, ceramic coating is very nicely done and fit and finish is top notch.

 

Looks good
MAP is test fitting their o2 dump version on my car now, its at their shop However they are then throwing my AMS downpipe on for me, lol. Along with my ported FPred that they are coating and porting my exhaust mani and coating it. Been there since last week. I haven't boosted my car for like a month

 

We can still leave ours on there if you wish Dave Thanks again for letting us mock up on your baby, I'm sure you can't wait to get it back on the road even with this snow today lol.

 

I am tempted to try an externally dumped downpipe but my car is pretty loud as is with the bullet catback and cams/test pipe, lol. I don't know if I want any more power right now...I keep thinking lately that something is bound to break now that I will be making close to 500whp when all is said and done.

I am always happy to help a local shop...you guys take care of me so I take care of you by buying all sorts of parts and letting you mock stuff up