The PROPER way to drill holes for Greddy BOV, retain 1g bov option. Pics

[GSLENK]

(Begin story)
I bought a used 1g cxracing FMIC kit. The bov flange was warped, not perfectly flat, so after having to silicone my bov on (emergency move) I had to remove it to troubleshoot a bov leak... great.

This gave me the opportunity to flatten my flange perfectly (belt sander + 200-500-1000-2000 wet sand paper finish)

I decided to fill the greddy (knockoff) holes and try it again. ( I used an aluminum braze from harbor freight, it surprisingly does a really good job, and I cannot afford a tig setup now...)

Flange came out perfectly flat and fits 1g perfectly without leaks
(end story)

Now, I want to see if there are any problems with my idea, and maybe use it as a refrence for the newbs. The previous owner of my FMIC kit should have read this...

Instead of lining up the holes for the greddy with the 1g bov holes, I decided why not CLOCK IT ANOTHER WAY. This eliminates leaks for when (not if) you decide your type S is ghey. I found this out the hard way when i wanted to take the greddy off and put my better 1g on. I took measurements and made a million paper mock gaskets to confirm that there will be no overlap or leak through the holes.

Without further babble, pics:
1- Flange finished/resurfaced. Shiny spots are where old holes were.
2- Gasket to show proposed holes
3,4,5- Visual of how the greddy will look clocked, I chose clockwise clocking, but I suppose counter clockwise would work just fine.

REMEMBER TO CLEAR THE REFERENCE PORT/RECESSION AREA OF THE 1G BOV! (its only on one side of the bov)

I can forsee only 2 minor/moot/possible problems (lmk if you see more):
-Will my offset placement weaken the structural rigidity of the flange? (i dont believe so)
-Is it ok if the bov valve hole is slightly off from the flange vent hole (the one big hole in the middle)? (I also think this wont matter)

BTW I am only doing this so I have a BOV while I DDG mod my 1g and use the BCS and link+nitrous control to manipulate it. I will go back to 1g bov.

 

[jpmxrider489]

Looks like you did a great job. I dont see any issues. As long as most of the air is coming out of the center than it should be good. Like you said this is a temporary fix. Because you drilled the holes the flange is weaker but I dont think it will make a huge difference.

 

[GSLENK]

yeah I dont think it will weaken. Im waiting for more to chime in as I have not yet drilled the greedy holes.

I really dont want to, but I want to try the DDG mod before I splurge and buy a TiAL. I think I can really get it to work with link controlling the BCS.

 

[Jkorny169]

The way you have the greddy gasket laid out is fine, you can drill them in that location. As long as the gasket makes a good seal around the center hole on that flange your fine. If your still worried you can use a tough of silicone to seal it.