Resonator removal, butterfly valve hoses, black vacuum box... questions/ideas.. - Honda Prelude Forum

thatchmaster · 05-30-2001, 08:16 PM

I removed the intake resonator in my car a few weeks ago, leaving the "2 stage" u-pipe still intact.

Today, I pulled the u-pipe out, and I capped off the hose that goes to it. That hose goes back to that little black vacuum box. I was wondering how many of those hoses are really necessary. I know that one of them has to control the vacuum pressure that's sent to intake butterfly valve. Since I capped off that hose, and removed the butterfly valve.. do I still need the hose that it starts from?

With the entire resonator removed now, it's really loud at WOT, starting at about 3000-3500 RPM. But, I really can't distingiush the VTEC crossover anymore. It's pretty weird. I was expecting it to be significantly louder. It does still pull harder when I hit 5000 though.

So, anyone who might still have a stock airbox in place, have you been in this situation? I really don't think there's a problem with it... but the fact that VTEC is not a lot louder, was a slight concern of mine.

Dr. James.. any input?

Thanks again guys..
Erik

thatchmaster · 05-30-2001, 08:24 PM

Well, I suppose Todd (Marcucci on here) didn't write this up for no reason...

http://www.ntpog.org/mods/fifth-intake/butterfly.shtml

I'll have to go out and look at it and find out what I can take off. So it seems that the plug on the vacuum box can just be removed. Hm...

Still looking for 4th gen input on this though..

-Erik

Cali Prelude · 05-30-2001, 09:01 PM

I took all that stuff out and just plugged the 'nipple' on the TB.
Everything seems to be running just fine like that.
I did bascially what was instructed on that web page.