Hey guys

Im kind of stumped on how I should go about doing this setup.

First off the car is an 88 Crx Si with a D16 motor

Im stumped on how I should run this setup, I dont know where to put everything in what order and what the laws of rules of making the best power are.

Check out this pic first



Its small but you get the idea, now heres my questions.

Im going to run a 3" downpipe into a mechanically operated 3" exhaust cutout. you can see in the pic how it is curved, i want 1 90 bend and then almost straight down about 10" into the cutout

Now as you can see my wastegate comes out just above the downpipe but it about 3.5" BEHIND it

I need to know where to make the wastegate dump enter the downpipe and if I am allowed to make it enter 2-3" above the cutout or if it has to enter BEFORE the 2 02 bungs

Someone please clarify that for me

Im just lost really on the fact if I can make the wastegate dump enter AFTER the 2 02 bungs or if one has to be ahead or if there any rules like that?

If it matters its OBD0, I should maybe also mention that Im going to have a full 2" exhaust being routed back from the downpipe

Let me know if you guys need anything else or pics or whatever

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurblowEF &raquo;</TD></TR><TR><TD CLASS="quote">
I need to know where to make the wastegate dump enter the downpipe and if I am allowed to make it enter 2-3" above the cutout or if it has to enter BEFORE the 2 02 bungs</TD></TR></TABLE>

I would think routing the wg dump tube farther down stream would be better.

Say you route the dumptube after the cutout....I dont think that it would hurt performance at all because the wg is excreting a less amount of exhaust gas into the exhaust then what is coming out of the exhaust housing of your turbo...therefore I would be not worried at all about "backpressure" resulting from the dumptube placement...


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurblowEF &raquo;</TD></TR><TR><TD CLASS="quote">
Im just lost really on the fact if I can make the wastegate dump enter AFTER the 2 02 bungs or if one has to be ahead or if there any rules like that?
</TD></TR></TABLE>

I would put the o2 bungs closer to the cat where the stock ones are because I have had friends fry their o2 sensors from being so close the the exhaust housing...

I dont think that you would see any sort of deviations in o2 readings regardless of if the dumptube is routed before or after the o2 sensors....

 

Well my downpipe is going to be pretty much straight down and my 2" exhaust will be coming out of that at 90degrees with my dump either at the top of the downpipe or the bottom

I dont think having the 02 or wideband bungs in the smaller exhaust would work

Need some help

 

If you are planning open DP, there is no reason to have the WG dump merge into it. Just run the WG dump separate and open.

O2 sensor is supposed to be 6-12" from the exhaust housing.

 

I cant run open dumptube, Ive got e-test to pass

 

my innovate wideband reccomended a minumum of 18" downstream from the exhaust manifold..

.<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurblowEF &raquo;</TD></TR><TR><TD CLASS="quote">
I dont think having the 02 or wideband bungs in the smaller exhaust would work

</TD></TR></TABLE>

it WILL work just fine.... I think you are over analyzing this

 

Over analysing? No way

 

bump