it all depends on the car.. the only way to find out is to test yourself.. even if you get 20hp/tq increase its worth it.

get whatever has the best fitment imo.

 

Yeah that is a good point. I'll have to figure out which one I am going to go with.



-Bink

 

i had the map intergrated downpipe with an open dumb on my fp black set up. It felt like the car spooled quicker and made more power when I made the switch from my old set up. Map was a perfect fit as well.

 

Good to know, thanks man


-Bink

 

Havent seen the Toxixfab in person yet.

 

Word, thanks for the reply Aaron


-Bink

 

Just picked up a map o2 dump from a guy getting out of the game.....$200 with a new sensor...i just hope i can tolerate the noise.

 

Dumps are only loud when you are on it. No worries, its worth it for the extra power.

 

do people port the 02 dump besides the 3d porting on the dump side?

 

Kind of curious why the 02 dump made the turbo laggier. Not questioning you on your results just find it odd. The graph should have been identical prior to the waste gate cracking open and then the dump should spool slightly faster with less back pressure.

 

It didnt really. I just didnt start the pull at the same exact RPM as the other one so it held that offset till it surpassed it.

aaron

 

I'm going to do a 2" dumptube with a stepped section to 2.25"

Using a larger diameter dump tube will help as well as reducing the bend radius on the turbine discharge...and smoothing the transition from the turbine outlet into the o2 housing...

I think it would behoove us to port the turbocharger out to nearly 3" from the turbine wheel to match the o2 housing... then you have a smooth transition from the turbine wheel into the o2 housing... somewhat UNLIKE what some of the manufacturers have been doing. It may only make a few more horsepower, but I figure it would be worth it.

 

OK. I have read through this entire thread and I am still trying to determine if this is a thumbs up for the JMFab O2 dump or a thumbs up for using any O2 dump. I have always figured that any O2 dump would add power due to elminating restriction but these numbers are pretty impressive. I previously had the MAP O2 dump on an older EVO and I really loved it although I never knew how much power it added. I now see that JMFab as well as Toxic Fab both have O2 dumps. For this build, I wanted to try something just a bit different and was looking to purchase the Comp Gate 40 set from MAP. I am hoping to take advantage of the O2 dump set up at the same time hold boost alot better.

http://www.maperformance.com/map-com...-cg40-o2h.html

 

Well swapped out old ported an coated o2 with map o2 dump lastnight....took 30 min and butt dyno is happy.

 

Thanks for clarifying. I attempted to port my muse 02 dump...
https://www.evolutionm.net/forums/ev...g-02-dump.html

Let me know what you think if you get a chance!