Good read here, I'm still hoping to get a O2 dump soon, but the boost issues are a concern

 

JMF dump is absolutely gorgeous. beautiful piece of art. Jim is the man and stands behind his products. I try to go JMF as much as possible. only other mani/dump i would look at is toxic fab, threads speak for themselves.

with that being said, there are dozens of threads on this. each thread, each car, each tuner has a diff opinion with diff results. some leak, some cause boost creep, some cause CELs, some run perfect, some add power, some do nothing but add noise etc. At this point i just think its like picking a number from a hat.

for what its worth, look at all the big shops, big race cars with proven results, and see if they are running open dump or big ported standard 02 housing. thats a good place to start your search.

they sound SICK. no question. but check out CBRD, Buschur, AMS, STM, Atlantic etc and see what there running in racing applications to get an idea.

and yes, install is straightforward but a HUGE PITA. be ready for broken bolts and bloody knuckles. claimed to help with creep and boost control, but as youve heard, it has done the opposite in certain instances.

my opinion, if you dont want it or LOVE the sound, just get a well ported titek/map etc and be good to go. gl in your decision brotha. cheers

 

The shop that's tuning this is running o2 dump on stock turbo 10sec car.


I currently have stock o2 housing so I'm sure I'll see improvement regardless. Just want to make sure it worth extra $.

Will jmf piece clear mishimoto radiator and ets Licp?

 

It will help with spool since any reduction in back pressure after the turbo will help with spool.

 

I had an Invidia and switch to a dump, I didn't really gain much . BUT the noise is embarrassing loud. I need to keep my boost at 25 for 93octane and it's venting a lot of exhaust out the dump. Maybe it's cause 2.3 has soo much more air volume but it's really loud. If it was at 35lbs it would probably sound perfect .

 

there are a few things to consider when looking at o2 housings---

one- is the design and angle of WG flapper in relation to dump tube or outlet--- other is materials etc---

megan style work ok but we've had them crack

invidia is very nice, and probably the best flowing

o2 dumps- many block the WG exhaust path which causes boost creept (aka power up top) inadvertently---

things to keep in mind-

we have made big 3" o2 housings... dump.. and also modified invidias to CREATE creep also for people that cant raise boost for autocross classes.. . lol

I simply HATE the noise of a dump pipe-

cb

 

On E85, my car was pretty maxed out HP/TQ wise. When I put on the O2 Dump I did not see any real increase in power(+5whp). On my car I had an ulgy boost profile, I was running the FP 25psi WGA.

I think the O2 Dump is the coolest sounding thing ever. If you have a FP18/25psi WGA, the dump will not open until much later.

The combo of the FP anti surge cover and the O2 dump just sounds killer in my book, I just have no contol of my boost under 26psi.

Still an awesome looking product, but I really think that it needs to be on an FPGreen/Red/Black. I dont think it is a good fit fo the stock trubo.

 

it actually will make a decent increase on the stock turbo because of the "Creep" affect-

it also depends on what type of boost control you are using!

cb

 

^ so what would you think works better on stock turbo (might upgrade to something like fp red or ef2 later)

Invidia or jmf dump? I"ll be running grimmspeed ebc with this.


I run open dump on my RSTI and its alright as far as noise. 2.5L with only 21psi in midrange.

 

with a 3 port id recommend an invidia-----

with the jmf you will see boost creep that will cause headaches with 3 port/ecuboost/correction.

cb

 

thanks for all the input.

anyone else has experience with both? pro's and con's of each.

 

For what's its worth, on a stock turbo STM went 10.5 at 128 with the stock 02 housing, then 10.1@132 with a Megan 02 and a few other changes. An open dump, although popular, will NOT be the source of magical gains like some think it is. People go very fast without upgraded wy/open dump on a stocker.

 

Lol had a ewg on my td04.. loved it.

 

I'm not expecting big numbers from either of the options. If dump makes 3-5hp more on stock turbo (comparing to o2 housing) then happy with that.

 

The titek o2 housing is great i love it but im putting mine up for sale only because my whole setup have changed