Blow thru questions

[kantista]

I am in the process of switching my sand rail from draw thru to blow thru. motor is a VW 2276, I will be blowing thru two 45 dells. T3 T4 turbo.
My question has to do with vacuum source from below the throttle plates. I was planning on drilling and tapping the intake manifolds and running vacuum line to boost/vacuum block with multiple ports. Was curious if tapping all four intake runners would be the way to go? Or just need to tap one cylinder?
Thanks,
Keith

[V8Nate]

I'm wanting to say cb sold some vacuum takeoff spacers that go between the carb and manifold for webers. I would personally do all 4 runners and bring the lines up to a vacuum block like I did on my 2058. Use better hose than that clear stuff though it didn't last long. I ended up going with 1/8th fuel line if I remember correctly

Sent from my SM-S918U using Tapatalk

[kantista]

Thanks for the reply!! That is exactly what I was thinking I was going to do.....Have you ran the engine with it set up like that?

[V8Nate]

Yeah i ran it for 1k miles and started having a slight miss. I was cleaning my idle jets and dropped and oring between the intake and fan shroud and noticed that clear hose was gummy and falling apart.

Sent from my SM-S918U using Tapatalk

[kantista]

Anyone have any thoughts or experience with only tapping into one runner or maybe two, like the 1 and 3 cylinders?

[Kafer_Mike]

I'm wanting to say cb sold some vacuum takeoff spacers that go between the carb and manifold for webers.

Looking good, Nate! If you wanted to stay with fuel-safe clear (or another translucent colors), look at minibike fuel line.

And here's the link to the CB Vacuum Reference Kit -- https://www.cbperformance.com/product-p/2040.htm

[V8Nate]

I'm wanting to say cb sold some vacuum takeoff spacers that go between the carb and manifold for webers.

Looking good, Nate! If you wanted to stay with fuel-safe clear (or another translucent colors), look at minibike fuel line.

And here's the link to the CB Vacuum Reference Kit -- https://www.cbperformance.com/product-p/2040.htm

You're the man Mike!

Sent from my SM-S918U using Tapatalk