GSRBoi785

Im really close to boosting and was wondering if i should take out the butterfly plate for 1st stage vtec?
thanks
justin

Mighty Mintos

i dont think that would be a good idea. the butterfly makes really good low and mid range power whether you boosting or not. keep it in until you want to run high boost, then maybe ditch the stock gsr for something bigger like a JG or and Endyn.

GSRBoi785

wouldnt it be restricting since it isnt letting all of the air in?

B18Flip

i've heard you can gain some HP up top by taking the butterflies out but loose some bottom end.......just get the skunk2 mani

Johnyquest

I wouldn't worry about it until your making some serious big power... they don't do anything but help when your not in boost anyways... so don't sweat 'em.

Matt

GSRBoi785

well 1st stage is 4400 and i'll hit full boost before then. 8psi low boost ~12psi high. if i remove the butterfly plate and set vtec when i hit full boost wouldnt it be better?

PrettyLude

you will lose on the low end, but u get it back on the high end

GSRBoi785

how would i lose low end if im reaching full boost and vtec before 1st stage would even kick in?

GSRBoi785

bump

eg6turbo

skunk mani =

GSRBoi785

outta money=

Muckman

iTrader: (2)

If you want it open (short fat runners) all the time pull the vac line off the IAB actuator.

GSRBoi785

will it still effect my low end?

Muckman

iTrader: (2)

well yeah, it would be open all the time, disabling the effects of having a dual stage manifold. so would removing the plate.

GSRBoi785

would it be restricting power if i left it in?

94dxt

for the most power remove them, as that will create the least air restriction. This power gain will be minor though and your low end power will be diminish some too.
If it were n/a I'd recomend it since you need all the power you can get, but for FI I say it ain't worth it.

GSRBoi785

i still dont understand why my low end with be effected since i can change vtec to whatever i want and i'll hit full boost before 4400. can someone please explain?
thanks for all the replies

twkdCD595

it is going to cause some low end power lose (torque)... from off idle to just before the turbo spools.

although since you said your turbo spools quickly and before the runners are even open... I would say imo, ditch the butterflys... keep the plate in there for the extra area it makes in the plenum.

for what little you lose in out of boost performance, I think you will see better performance in the boosted area's of the powerband.

GSRBoi785

why does it cause power loss off idle if i dont even see vtec till 4400?

2point2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRBoi785 &raquo;</TD></TR><TR><TD CLASS="quote">why does it cause power loss off idle if i dont even see vtec till 4400?</TD></TR></TABLE>

because if you take them out then your essentially running a (big) intake manifold that wasn't designed for low RPM - it's the whole reason why the manifold is dual stage. My IAB is disabled and have no complaints.. not that i ever had them working though... and I'm ~2300lbs...

GSRBoi785

ohh i c so its like putting a skunk2 mani on a stock LS

94dxt

your power loss will be experienced during daily driving, crusing around, most likely not while boosting, and your gass milkeage will suffer some. It's going to be like the affects from a mild porting.

GSRBoi785

if i do keep it in when should i make 2nd stage come in
my set up:
neukin equal length manifold
garret t3/t04e 60 trim .63ar
tial 38mm WG
tial BOV
GReddy Profec B Spec II
750cc injectors
hondata S200 w/boost
walbro 255lhp intank
apexi TT
custom 3" down pipe and exhaust
custom intercooler w/ 2.5" piping
Fast-Turbo oil lines
i think thats it

GSRBoi785

hey i was just thinking... can i set both stages to open up at the same time so i wouldnt lose and low end and not lose any top end?

Muckman

iTrader: (2)

The IAB valve is positioned on the short (high rpm) runners. When it opens the short fat runners are the path of least resistance however the long (low rpm) runners are still open at all times. Air already flows through both stages when the valve is open.