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View Full Version : evo x downpipe gains???



carlosf
09-11-2009, 04:18 PM
does anyone know the average power gains you will get with an aftermarket downpipe if your running the stock cat?

kenji815
09-11-2009, 06:14 PM
I would think it would 10-15 HP untuned.

Blaze
09-17-2009, 02:42 PM
I would think it would 10-15 HP untuned.


What are you basing that on?

jdmcwestevo
09-17-2009, 03:08 PM
it depends if its a downpipe that includes o2 or just a dp

Blaze
09-17-2009, 03:20 PM
It's really not a good question because there are so many variables.Â* That's why anyone advertising a product like this will state that it makes a % gain, or up to x amount of HP.

Several DPs have reported lower both power and torque on the low end, while making marginal gains on the top end.Â*

Choose wisely, young jedi....

Mike W
09-17-2009, 03:42 PM
I cant imagine much of a gain at all. Figger the stock cat and smallish flange flows less than the stock DP (long or short). So add all the big pipe you want in front of that with the same turbine wheel in front and same cat and flange behind it and what would be the gain in flow?

Mike W

earlyapex
09-17-2009, 05:38 PM
I've seen no gains with DP. If you do a DP and test pipe at the same time, all the gains are from the test pipe.

When going to a turbo that flows more, then upgrading the 02 or going with the all in one style like AMS will show some gains. On the stock turbo, I wouldn't even bother.

jdmcwestevo
09-17-2009, 05:43 PM
i think the o2 dump downpipes from ETS are awesome just because you get that atmospheric dump haha

earlyapex
09-17-2009, 05:44 PM
i think the o2 dump downpipes from ETS are awesome just because you get that atmospheric dump haha


Only gains I have seen from 02 dumps are noise.

00Evo
09-17-2009, 06:40 PM
http://forums.evolutionm.net/evo-x-engine-turbo-drivetrain/325742-downpipe-test-zero-gain.html

AMS put this on the other forum saying there are no gains from their 02 downpipe

jdmcwestevo
09-17-2009, 06:55 PM
i think the o2 dump downpipes from ETS are awesome just because you get that atmospheric dump haha


Only gains I have seen from 02 dumps are noise.


like i said its awesome because of the dump haha

JayDub514
09-18-2009, 02:06 AM
http://forums.evolutionm.net/evo-x-engine-turbo-drivetrain/325742-downpipe-test-zero-gain.html

AMS put this on the other forum saying there are no gains from their 02 downpipe


They were referring to fabbing just a DP, NOT the 02 DP.

I like to Smash
09-21-2009, 11:17 AM
ive noticed AMS o2 DP got good TQ gains! as well as overall power with DP and full Catback.

blkside
09-21-2009, 12:32 PM
Ok well this thread is nonsense.

I didnt notice a bump in power but what I did feel was a smoother delivery....

Mike W
09-21-2009, 11:04 PM
It started out as a question on if a big DP would help if you put it in front of a small stock cat. Then it turned into is a DP worthwhile at all? On a Garrett GT3076 with a 100 cell cat it made all the difference in the world. Went from why bother getting a biggee turbo at all to WAH-Hoo!

Mike W