im putting my motor together and was wondering where this thing routes to. do i need it? ive stripped pretty much EVERYTHING un-necessary from the engine bay and was wondering if i can plug the lim where this thing goes. thanks for the help





why is it not on this jspec mani?

 

chunk it. and block it off.

 

That is the brake booster line on the jspecs. Most of them lack the larger vac nipple on the rear facing side of the UIM where the usdm brake booster hooks up to. Dunno why, but I sure somebody knows the reason

 

that is a nice engine bay
one question i am in the process of polishing everything just like that but how did you get the oil filler neck shiny is it painted or what cause my neck is not aluminum

 

mine is powder coated a "chrome" color.... looks just like it was polished.... i got it off of ebay

oh, and im not sure those are pics of his engine bay.... notice one is blue, one is red, and one is black

 

so i can just route the brake booster line to a different nipple on the lim? or can i route it to the uim? s4 coolant necks are metal (aluminum?) but s5's are plastic...powdercoating is the way to go.

 

Make sure it is good sized....since that was the way it was stock.

The jspec manifolds had to have that since their brake booster is on the right side of the car.

James

Edit - Your question for the last picture...it's not a jspec LIM. Thats why...

 

are you sure that the bottom one isnt jspec? mine looks like the top two and it does have that piece that im talkin about

 

Yes, positive. You can see the flat area on the casting that was supposed to be drilled and tapped for the brake booster line.

Here is the fun I went thru with my brake booster vac source problems.
https://www.rx7club.com/showthread.p...hlight=booster

 

i understand, thanks a lot

 

That last one is my engine bay and it is NOT jspec. I do have a Jspec I bought back in the day from mrmazda7 on ebay and it looks just like the top two. Which will be on my car soon (not for any other reason other than I sold the one that is currenlty on it in the picture).

 

cant you also run it from here and then block off the LIM?

 

^That is off a US spec manifold, if you had the 2 side by side you would see the US one has a drastically larger (8mm or so) vac nipple that is the booster source.

 

so use the one on the TB or on the LIM?

 

You have both? Cap one, (I'd cap the jdm one with a bolt and some thread sealant) and run the booster line to the other.

 

what do you mean the jdm one? should i cap the one on the lim or on the tb or does it not even matter? are you implying the tb or lim is jspec?

 

By the JDM mani, I mean the one that has the nipple on the passenger side under the BAC valve. It really doesn't matter either way though which one you cap.

 

sweet thanks, i didnt realize i had jspec manifolds i guess