Relocating Boost Vacuum Hose - Help

[QRI05E]

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

[mad082]

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.

[QRI05E]

did it need to be welded?? anyother method? im trying to avoid welding cause i dont have the tools or knowledge to do so...

[QRI05E]

I dont understand how the cooler air from the BOV hose could cause the acutator to spike boost... :

Edited May 26, 2006 by QRI05E

[Craved]

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]

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??

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

Edited May 26, 2006 by QRI05E

[mad082]

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.

[mad082]

HKS GT2835 Pro S Turbo.