Just wondering why I see people swap out there stock GSR intake manifold, with a single length runner manifold. What are the pros: and cons: of doing this? Is this something I should do when I go FI?

Thanks

 

Well they say it gives you more topend power . Some people remove the butterfly valves . I for one just left mine on . The stocker is very under estimated as i just ran a 10.6 @ 137 with mine in a 2650lb gsr . I would spend money elsewhere first .

 

really? man roger that one!! so is that what i'm hearing close to red-line, the butterfly's opening.

 

The butterflys open @ 5700 rpm so i dont know what you are hearing at or near redline .

 

Yeah sorry, thats what I meant.

 

upgrading to a aftermarket single runner intake will give you better top end power if tuned. but the con is you will lose some low end torque that was provided by the stock's 1st stage longer skinnier runner. so a dual stage stock intake would be more ideal for daily driving but a single stage intake would be better for racing when you always stay high up in the rpms and dont really use the 1st stage of the intake. i would spend money else where like already mentioned and keep the stock mani until you really need to upgrade it. i still have my stock intake mani and love it when the butterflys open!

 

Also, people probably like seeing the runners/plenum/throttlebody up in a viewable position rather then curled under.

I know most people wont admit that, but who are we kidding here

 

We did as much as 450whp on a 81.5mm motor with a stock GS-R manifold and cams.

We learned that the low runners max out at around 270whp when the first tuner clamped the short runners closed thinking it was open.

I recommend using it until you have some data that says the single runner manifold is much more efficient or faster than the stock manifold. We had intended to move up to a JG manifold to see what it would do but we tanked the motor before we could do that.

 

Okay great info, as I only plan on 300-320 whp for my Daily.
Thanks!!

 

switching up to a skunk 2 intake manifolds help make power up top due to the runners, and eliminate the butterfly valves that the stock gsr manifolds have, so instead of a 2 stage vtec, its a single stage when it crosses over all at once. nothing everyone else didnt say up there though ^^^ lol

 

2 stage vtec ????? never heard of that term used.... depending on what size turbo you have i can see where the gsr mani might limit spool of the turbo... or make it spool up later

 

or make it spool up faster ... wouldnt know till it was tested

 

stock gsr manifolds have 2 different stages for vtec

correct me if im wrong, its been a while since i explained this

@ 4400 rpms vtec is activated and the primary butterfly valves open

@ 5500 rpms the gsr manifolds secondary butterfly valves open

These skunk 2 and blox manifolds are sort of like ITR copys in their runner design and in the fact that they eliminate the butterfly valves so vtec is 1 crossover.

However, there is a way to eliminate these butterfly valves in stock gsr intake manifolds as well.



EDIT : My mistake, this article here explains the GSR vtec engagment

taken from Team-Integra.net

 

wrong! although the part you got from team-integra is right. vtec has 1 stage, at 4400rpms (gsr) it engages and the higher cam profile is used. the intake manifold has 2 stages, 1st stage 0-5750 rpms uses long skinny runners and the 2nd stage butterflys open and the short fatter runners are used. vtec has no butterfly's.

 

I was referring to the gsr manifold not vtec lol i get what you're saying i suppose my wording was goofy

 

so what if you just leave the butterfly open all the time what then

 

Yeah x2 ^^^

 

You will loose power and torque in the low end .

 

Is this manifold pretty much junk? Would I be better off keeping my stock manifold for boost?

http://cgi.ebay.com/ebaymotors/94-01...item19b5c57941

 

your manifold will be fine for boost. If you want to switch up to one and be easy on the wallet look at the blox one. Almost exactly the same as the skunk 2

 

Oh okay one of these ..http://cgi.ebay.com/ebaymotors/BLOX-...item2eb124bb7e

 

yup, I have a couple friends who are using those on their cars without any problems, unless you dont like "knock off" companies

 

Nah.. I dont really care. I would probly peell the sticker off anyways and shoot it with some wrinkle finish black paint.
Oh I found it a little cheaper here + free shipping.

http://www.autopartsdealer.com/blox_...tent=APD443784

 

Leave the stock manifold or pick up a blox. The minimal gains down low the stock provides vs a blox top end isnt worth it so if you really want to spend money geta blox, same as skunk2. otherwise stick with stick it will perform with stock configuration and some moderate boost with properly sized equipment

 

Oh okay, so I guess I can spend the money somewhere else.