i thought that someone told me once that a after market intake mainfold for a gsr actually makes more power that the stock dual plenum manifold is this true?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sloweredcivic &raquo;</TD></TR><TR><TD CLASS="quote">i thought that someone told me once that a after market intake mainfold for a gsr actually makes more power that the stock dual plenum manifold is this true?</TD></TR></TABLE>

That's the whole point of an aftermarket intake manifold..To make more power..

Are you ok?

 

i under stand that my freind and i were arguing about it he said that the iab's made perform better than a single plen mani and i said why would they make the after market mani single plenums if they didn't make more power we were just wondering how much more?

 

The dual-stage manifold helps out with low/midrange on the b18c1's. If you just slap a skunk2 manifold (or any other single stage manifold for that application), then its not going to run very well.

The stock VTEC point on GSR's is like 4400 rpms. The butterflies open up at 5500 or so. Just putting the single-stage manifolds on without changing the vtec point or tuning will run pretty crappy.

I have a skunk2 manifold on my b18c1 in my CRX, and when I was running the stock ECU, it would bog down as soon as it hit VTEC until about 5500 or 6000 rpms, and then it would pull hard all the way to redline. Once I moved the VTEC point up to 5500, it pulled nice all the way through with a smooth crossover.

Theres a lot of people making great power with the stock dual-stage manifold, but for the most part, the single stage will make more power up top with tuning. You usually just lose a bit of power down low.

I didnt care much for losing a little bit of low-end because I have a CRX. There's not much to push around.

 

I've also got a Skunk 2 intake on my B18C and TOTALLY agree with what Mr-CRX is saying. (one of these days, I'm going to hit him up for one of his chips)

The reason that I went with it was due to the added clearance it adds between the engine and firewall. It can be an issue when putting the motor in an EF.

Wes

 

would a vafc solve this problem?

 

bump

 

the reason why they make the single runners is because it's like putting a single carburator on a single cylinder. (example only so don't Jone on my ****) you have four cylinders and one intake mani. lets say your mani has a flow rate of 200 cfm, divide that by 4 and you get 50 cfm per cylinder. Now put a single plenum on each cylinder that has a 200 cfm flow rate, multiply that by 4 and you get 800 cfm. Thats just a rough idea, I'm not saying that your car only flows 200 cfm.

 

no i did not mean itb's i meant a single set of runners mani because the gsr is dual with the iab's i wanted to know what i needed to tune it if i changed it because i can pick up a vafc really cheap so if the will change my vtec crossover points will that work??