How much power is tended to be loss by switching to a skunk2 manfiold from a GSR manifold. Whats the best way to minimize the power loss without doing head work?.

 

why use the manifold if it loses power? honestly? what the hell?

 

what cams are you on? without ANY head work, why even get the Skunk2?

 

Umm...

Like mentioned, why would you get it knowing you will lose power. That's like asking someone to hit you with a baseball bat, knowing that it's gonna hurt.

You'll definitely lose low end torque with a Skunk2 IM, but you should gain power in the upper RPM range. It won't be as much as you could w/headwork though. You can tune to minimize power loss but really, it sounds like you should think about some other mods first.

 

Get some cams, cam gears, header, cat, exhaust then get the skunk2 IM and tune. then, you'll see great gains from it.

 

well I already have I/H/E/CAT/VAFC/FPR. I only want to get the manifold now because I need to get a chipped P28 and i was told that if i get the chipped ECU on the stock manifold I would loss power due to the butter flies

 

go get your car dynoed first before talking about losing power on skunk2 manifold.....

 

at this stage of the game, a chipped ecu is not gonna due you any better than tunning the afc

 

my primary reason for wanting the chipped ECU is to remove get rid of the speed limiter that I currently have on my JDM ECU.

 

DONT DO IT WITHOUT HEAD WORK. like the others said.

 

I wouldn't think headwork is all that necessary, but since the S2 manifold is pretty much an ITR manifold made to fit the GS-R head, you really need to run upgraded cams and valvetrain, either ITR, CTR, or aftermarket, to realize the gains from the manifold. Cam gears can help, too, and then of course tuning everything to get the best and smoothes power curve you can.

When tuning, try to get the hump at the VTEC crossover point to be as small as possible. You want a smooth transition between the smaller and bigger cam lobes. I've seen tuned cars with power curves where the VTEC hump is almost non-existant, which is what you want.

 

He wants the S2 manifold because with the P28 the stock manifold will only use the short runners. The P28 will not control the short to long runner switch. If I were goning to run a P28 I would do the same thing. I also agrre that some ITR cams would be the way to go with that setup as well.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by You_Get_Vapors &raquo;</TD></TR><TR><TD CLASS="quote">He wants the S2 manifold because with the P28 the stock manifold will only use the short runners. The P28 will not control the short to long runner switch. If I were goning to run a P28 I would do the same thing. I also agrre that some ITR cams would be the way to go with that setup as well.</TD></TR></TABLE>

Yeah I know that's why he wanted it, and he wants the P28 so that there won't be a speed limiter like on the JDM ECU.

I was just giving some good suggestions on getting noticeable gains from adding the manifold.

 

vacumm controls the butterfly opening..... so it doesn't matter the computer. he just wont have the correct timing advance and fuel curve for the switch, but he could tune that w/ the v-afc or get a program for the chip that includes the secondaries

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 3.504 &raquo;</TD></TR><TR><TD CLASS="quote">vacumm controls the butterfly opening..... so it doesn't matter the computer. he just wont have the correct timing advance and fuel curve for the switch, but he could tune that w/ the v-afc or get a program for the chip that includes the secondaries</TD></TR></TABLE>

the ecu does control it. theres an actuator switch on the manifold.

 

does the 95 gsr mani have the staged butterfly stuff? sorry to kinda jack thread

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSTEG96 &raquo;</TD></TR><TR><TD CLASS="quote">

the ecu does control it. theres an actuator switch on the manifold. </TD></TR></TABLE>
then howcome you can pull the vacumm line off the diaphram and the butterflies stay open all the time? i did it to a gsr and no codes were thrown or anything, just opened butterflies the entire time, car didn't do anything else different

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4g4drb17 &raquo;</TD></TR><TR><TD CLASS="quote">does the 95 gsr mani have the staged butterfly stuff? sorry to kinda jack thread</TD></TR></TABLE>?

 

yea all GSRs 94-01 have staged butter flies

 

ahh 96 and up for the secondary intake runners if im not mistaken

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gser67 &raquo;</TD></TR><TR><TD CLASS="quote">ahh 96 and up for the secondary intake runners if im not mistaken</TD></TR></TABLE>
nope blk99vtecr is right, gsr's from 94 to 01 all have dual stage runners.

 

your skunk2 manifold is designed to make power more or less on the top end. with your stock cams you're peaking at 7600rpms. therefore your cams can't orchestrate the airflow that your manifold is providing. best bet would be to to get some more aggressive cams with cam gears and a dyno tune for your optimum vtec switchover point. with all these mods together you'll see optimum gains.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 3.504 &raquo;</TD></TR><TR><TD CLASS="quote">vacumm controls the butterfly opening..... so it doesn't matter the computer. he just wont have the correct timing advance and fuel curve for the switch, but he could tune that w/ the v-afc or get a program for the chip that includes the secondaries</TD></TR></TABLE>

The ecu is needed to controll the butterflies aswell....Only the p72 has the ability to controll the gsr secondaries

 

If im right the Skunk2 only makes power over 7,000 rpm get more mods first

 

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