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I am nearing the completion of my twin turbo LS3 RX7 FD buid and need to know if my BOV and meth placement is OK, as i have a very short run from my intercooler to the throttle body.
From the below pic below -
The two red dots either side of the intercooler will be the two meth nozzles. That intercooler is divided up until the silicone coupler, does that matter? Should i spray the meth diagonally facing towards the air flow, away from it, or put them in straight so they both spray to the center of the pipe where the divider is?
The BOV is the Purple line. I was planning on running this either to the left, right or underneath in that area depending on clearance. Is it going to interfere with my meth and spray it all over my engine bay? Does it really matter if a bit comes out the BOV? i will be running 50/50 meth/water mix. The only other thing i could do is run two BOV's and put them by the turbos but that means spending another £300 which i dont have!
The yellow line after the throttle body is the IAT placement. I have already done this.
I will be replacing that coupler with a much shorter one and putting some 4" pipe in between the cooler and the throttle body so i can weld on the BOV flange.
BOV should be upstream (before meth nozzles) that way you don't get meth blowing out all over the place. I would mount the BOV before the IC, and mount the meth where you have it.
BOV after the meth isn't too bad, just don't run pure meth. Washer fluid is fine.
Even when its before the nozzle, any meth in the charge pipe is going to be vented out of the BOV when the throttle closes.
BOV after the meth isn't too bad, just don't run pure meth. Washer fluid is fine.
Even when its before the nozzle, any meth in the charge pipe is going to be vented out of the BOV when the throttle closes.
Very little though, as if the BOV sees vac to pull it open.....the meth controlled should also have already turned off the pump.
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Is this BOV and Meth Placement OK? 
