Intake manifold vacuum vs a vacuum block
#1
Intake manifold vacuum vs a vacuum block
Like the title states, I'm trying to figure out which would be the better setup for vacuum to run all the components on my turbo build. Ie; wastegate, bov, boost gauge, boost solenoid, brake booster, etc.
manifold currently has no vacuum sources at the moment, alum manifold, previous holes in manifold, threads were all stripped, welded them up. Now trying to decide whether to drill and retap for new connections or just put one going to a vacuum block.
manifold currently has no vacuum sources at the moment, alum manifold, previous holes in manifold, threads were all stripped, welded them up. Now trying to decide whether to drill and retap for new connections or just put one going to a vacuum block.
#3
Honda-Tech Member
Re: Intake manifold vacuum vs a vacuum block
what ^he^ said.
If you T into the brake booster hose, just make sure it's before the check valve lol, as visible in his picture.
Also, the key to using a vacuum block is to make sure the hose for the vacuum source is large enough, 1/4" should do the trick. reason being that a lot of air needs to flow in and out of the block at all times, and you want it to be capable of flowing enough to not cause a delay in pressure equalization, otherwise you can get incorrect readings for sensors, and improper operation of certain parts, and boost level issues of compressor surge.
If you T into the brake booster hose, just make sure it's before the check valve lol, as visible in his picture.
Also, the key to using a vacuum block is to make sure the hose for the vacuum source is large enough, 1/4" should do the trick. reason being that a lot of air needs to flow in and out of the block at all times, and you want it to be capable of flowing enough to not cause a delay in pressure equalization, otherwise you can get incorrect readings for sensors, and improper operation of certain parts, and boost level issues of compressor surge.
#4
Re: Intake manifold vacuum vs a vacuum block
Thanks guys.
How about a particular place in the manifold to place the new port for the most vacuum? Top, bottom, middle, end of the manifold?
How about a particular place in the manifold to place the new port for the most vacuum? Top, bottom, middle, end of the manifold?
#6
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Re: Intake manifold vacuum vs a vacuum block
Question I see that's the vibrant vacuum block the hose the connects from the vacuum block to the t fitting. What size fitting is that on the vacuum block? I see the vibrant vacuum block comes with 1 3/8npt port. And 6 1/8npt ports from what I've searched. Also what size is that T fitting? 3/8? I would like to run this exact setup on my eg hatch soon to be boosted. Thank you.
#7
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Re: Intake manifold vacuum vs a vacuum block
Question I see that's the vibrant vacuum block the hose the connects from the vacuum block to the t fitting. What size fitting is that on the vacuum block? I see the vibrant vacuum block comes with 1 3/8npt port. And 6 1/8npt ports from what I've searched. Also what size is that T fitting? 3/8? I would like to run this exact setup on my eg hatch soon to be boosted. Thank you.
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#8
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Re: Intake manifold vacuum vs a vacuum block
I'll need to confirm as the car is in another building right now, but the barb hose from.the VB to the large brake booster T fitting is 7.93mm or 5/16th (shown on the 2nd photo) the T fitting itself I believe it's 3/8ths , but I do believe if there was an adapter male barb fitting between the 3/8ths and 5/16ths. I.know we just used what we had available. But that's the best I can remember without being there
#10
Re: Intake manifold vacuum vs a vacuum block
Certainly relative to the topic.. I mounted a vacuum block once before. I used the brake booster source that I tee'd my boost gauge from, so a good source.. After all was said and done, I had a pretty rowdy surging idle. All barbs used were connected well, the couple that were not were tightly capped. No problem before it.. I removed the block and put it all back as it was and no more hunt.. What went wrong?
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