How many vacuum ports do I need to add to my FFIM

[92nsx]

Yep, as the title states how many do I need? I will also need to add in 2 extr for elec. boost gauge sensor and boost controller. I want to finish up welding everything up this weekend.

Here is what I know (1) 3/8" nipple on back of intake for brake booster,

1/8 - boost controller, boost sensor, BOV, AFPR (fuel), cruse controll,

1/4 - Steering valve thing

If I descide to keep EGR stuff is one 1/8" also needed for that?

Is BOV correct, on 1/8

Added up (5) 1/8" nipples and (1) 1/4
Dose this sound right, am I forgetting some?

Should I add 2 extra just in case some day might need them?

 

[figgie]

1 really and tie that into a air distribution block like an eagle vacuum distribution block.

http://www.goldeneaglemfg.com/str_vacman.html

 

[92nsx]

Thank you Figgie, I thought you would charm in. Would that have any pressure/vac drop? Looks like one 1/4 or 3/8 in and 6 out..... Wouldn't things be more accurate, faster, if each thing was pulled straight of the bottom of the manifold? But that is also easy to make, just harder to hide in the engine bay.

 

[WhtMa71]

If you're worried about it, plumb one for the brake booster as well as another one the same size to a vacuum manifold like figgie said.

 

[figgie]

Thank you Figgie, I thought you would charm in. Would that have any pressure/vac drop? Looks like one 1/4 or 3/8 in and 6 out..... Wouldn't things be more accurate, faster, if each thing was pulled straight of the bottom of the manifold? But that is also easy to make, just harder to hide in the engine bay.

not really.

You will get quick readings for boost, fuel pressure, boost controller almost at the same time. Keep the lines small since it is for pressure and not volume readings

 

[92nsx]

Ok I will go that route. One for brake booster and one large one going to the distribution block. What size of fitting should I use coming out of the manifold going to the distribution block? NPT 1/4 with 3/8 hose be good? Also with the brake booster port on the back of the manifold (by fire wall) where would be the BEST spot to install the other port? Front center, middle, any where b/c it dosen't matter?

Also since Im in minnesota where there are no emissions check, Im not planing on installing the EGR valve. But since my car came out of Cal. there is a sensor on the EGR valve, with this not hooked up will it throw a check engine light? What dose is sence? EGT?

 

[Mr. Y]

And one more to remember...
Connectiong sensors (MAP) to the same line as actuators (Blow-Off, Wastegate, FPR) is not good idea, cause actuators can make MAP readings unstable.

In other words, I'd made separate port for MAP. Even If you don't use it right now, think about future ;-)

 

[IJ.]

I'd add at least 4x 1/4" bsp ports.

If you don't use em you can fit blank plugs, it's always easier than adding more later if needed.

 

[92nsx]

I knew I would forget one Mr. Y got it connectiong (MAP).

Ok so here is what I am thinking Go (3) 1/4 npt ports on the bottom of the manifold and one on the back. Use one for steering valve, one with 3/8 hose feed to distribution block and one for future map sensor. And the back one being used for brake booster.

Sound good?!?!?!?!:>

 

[IJ.]

Yep sounds good!

 

[92nsx]

COOL!! thank you every one for the help and quick answers. I just got done making a Vac. manifold out of t6061 alum.:icon_bigg It is 5" long, 1" tall and 3/4" thick. With the end having a 1/4 npt thread tapped into it and (6) 1/4-28 threaded holes on the top.

So there is 6 1/8 nipples or I can swap out 2 of them for 1/4 nipple if needed and (1) 3/8 nipple on the end.

Sorry all I have is the camera phone on me at the time but I attached a pic of it. It flows kind of funny thou, hooked up to 30 psi. the end 4 holes flow good and the first 2 have a vacuum effect to them. but it could be becuse the air is flowing into the atmosphere, and nothing to stop or block it like a BOV or other things would. I will have to test it out more.

 

[WhtMa71]

Nice looks good!