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Relocating Boost Vacuum Hose - Help

QRI05E

By QRI05E,
in Engines & Forced Induction

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QRI05E Mentor

QRI05E

Posted
Posted

Hey guys, as im soon installing a FMIC kit on my R33, im going to need to relocate the vacuum hose that connects from the stock IC pipe to the acutator. Now i know everyone says to T-piece it of the BOV hose however i have read that due to using a turbotech or any boost contoller, its likely to spike. Why is this??

Any other suggestions with out having to weld a nipple on the FMIC kit??

Cheers

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mad082 Grand Master

mad082

Posted
Posted

spikes due to the changes in temp that you will get with the front mount. on a cold night the air will be much cooler than with the stock cooler. i had a problem with spiking when i was running it off the bov hose so i got the niple off the stock piping and transplanted it to the 'hot' pipe of the stock piping. its the only way you can do it. there is no vacuum hose on the hot side of the cooler.

Craved Grand Master

Craved

Posted
Posted

thats an issue with any T peice, cant explain why though

off the plenum somewhere is the best place to get the pressure feed from

if you put it on the piping before the IC you will notice more drop off with the intercoolers restriction.

QRI05E Mentor

QRI05E

Posted
  • Author
Posted (edited)

Ahh ok... well i currently have my boost gauge connected to my plenum hose (pic shown).. would this be a better place to run the acutator hose to prevent spiking? or is it going to be the same sh*t as the BOV hose??

post-23753-1148650390.jpg

Please post a pic of which hose you recommend I use... cheers!

Edited by QRI05E
mad082 Grand Master

mad082

Posted
Posted

depends on where you have your boost gauge running from. talking to guys with big hp cars they have their boost gauge hooked up to their wastegate lines as oppose to the plenum so they know exactly what the turbo is boosting to, as the engine gets less than the hot side of the cooler due to restriction of the cooler.

also i've seen turbo's (HKS i think it was) with the wastegate line running directly off the compressor housing, so it can't be that bad. i get less spiking now that i'm running it off the hot pipe than i was off the plenum. boost gauge is still off the plenum.

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