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Discussion Starter #1 (Edited)
I’m switching to an Explorer intake on my current engine build. In my current configuration I only run PCV and Evap from the front side of the manifold. Brake booster, EGR and FPR off the rear of the manifold with the bigger tube going to the brake booster.
On the Explorer upper I have, I’m ok on the front, but it only has one large tube and one small tube in the rear.
Question is: will I have enough vacuum running EGR and FPR both off that one little tube with a vacuum tee?
Alternatively I could run the big tube to a foxbody plastic tree and run everything off that, but I’m trying to keep it as tidy as possible. Not a lot off room in the engine bay. I may eventually ditch EGR so would prefer to not add another barb to the manifold if possible.
Also had considered drilling and tapping for the OEM branch, but the lower part of the Explorer plenum is much wider than the HO plenum so the tubes would end up sticking out the back too far. Again not much room in the Miata engine bay.
Pics show the 2 different plenums.
Cheers.
 

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Discussion Starter #3
Damn, it’s an Explorer upper. Sorry for the confusion- fixed original post. Thanks for catching that.
 

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Discussion Starter #4
Anyone know if I can use the one little tube to provide vacuum for egr and fpr? Will it provide enough vacuum?
 

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In the 1st pic, with the fitting that has one big tube and two small, the small tubes were for the EGR/emissions and the other for the FPR.
Your FPR should not share a line like you are thinking about doing. It needs to be dedicated.
 

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Discussion Starter #6
That reasoning means using the plastic vacuum tree is out too then. So the only option appears to be to tap another hose barb in there, right? Unless I run EGR off a tree to free up the little tube for FPR. Ya, that should work, then when the time comes if I ditch the EGR, I can ditch the tree too.
 
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