I drive an 01 GSR, would I have to chip or get a new ECU with a Skunk2 intake manifold to keep VTEC engaging right when it should? I know that you need a new ECU for BLOX IM, but is the same true for Skunk2?
Thanks.

 

I have never heard of this issue with Skunk2 IMs. My buddy has a SK2 IM on an LS/VTEC. His **** is chipped but he ran it w/o that for the longest time, no issues with VTEC.

 

you don't need a new ecu for a blox or skunk2 intake manifold. thats bullshit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B_CRUZ &raquo;</TD></TR><TR><TD CLASS="quote">you don't need a new ecu for a blox or skunk2 intake manifold. thats bullshit.</TD></TR></TABLE>

and this bullshit all starts because many places online have people talking about the secondaries in the stock gsr IM, and the loss of this function when going to the skunk2 and blox manifolds.
is this correct?

 

all I know is some *** hat posted a 'how to' here and claims that the set up needs a chipped p28.

It does not need it unless you are changing up your cams to at least ITR/CTR spec and if you are getting upgraded valvetrain.

If your motor is stock internally and you have a skunk2/blox manifold, you do not need a chipped p28 unless you love to pay for gas.

You will not throw any kind of check engine light with a non OEM manifold.

 

cool ...good to know...
sucks there is so much misinformation floating around.

 

Yeah misinfo suck, it caused me to put my pistons in upside down, JK. Sorry I'm drunk and bored on this 4th of July eve... Yeah when I read this post I was like WTF. It makes no ******* sense, why would a company even try to market a product if it requires another change. If that was the case don't you think they would put it in some sort of package deal?

 

no you don't have to do anything. all you might want to do is adjust your fuel curve with a chip and a fuel pressure regulator (mine's getting that done tomorrow morning) i also have the skunk2 but mine's non vtec but i looked at em for my friend's civic with a gsr motor.

you're good to go

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Papa C &raquo;</TD></TR><TR><TD CLASS="quote">no you don't have to do anything. all you might want to do is adjust your fuel curve with a chip and a fuel pressure regulator (mine's getting that done tomorrow morning) i also have the skunk2 but mine's non vtec but i looked at em for my friend's civic with a gsr motor.

you're good to go</TD></TR></TABLE>

cool cool, very good to know. Thanks everyone!

 

Some of what has been stated is true and not true. I did the skunk2 IM install on my gsr and went straight to the dyno. I tried my stock ecu, then my custom all motor chipped p28 ecu...i made 7whp and 12lbs of torque with the chipped ecu. The stock gsr p72 ecu looks for the iabs, which is eliminated when you use a single stage manifold such as the skunk2 or blox. You dont necessarily NEED a new ecu when you switch manifolds, but I noticed a night and day difference when I ran my custom program compared to running my car with the stock gsr ecu.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iH8RICERZ &raquo;</TD></TR><TR><TD CLASS="quote">Some of what has been stated is true and not true. I did the skunk2 IM install on my gsr and went straight to the dyno. I tried my stock ecu, then my custom all motor chipped p28 ecu...i made 7whp and 12lbs of torque with the chipped ecu. The stock gsr p72 ecu looks for the iabs, which is eliminated when you use a single stage manifold such as the skunk2 or blox. You dont necessarily NEED a new ecu when you switch manifolds, but I noticed a night and day difference when I ran my custom program compared to running my car with the stock gsr ecu.</TD></TR></TABLE>
Yeah....looking probobly for a chipped p28 ECU. Thing is, I really don't know too much about ECU's. I understand a p28 will recognize that you've got a single stage manifold, but what are the downsides to running a p28 as opposed to the p72 which is stock on the GSR? Will I lose functionality in any areas, and will it change my VTEC engagement point? Thank you so much for your help.

oh, and I'm in the bay area, could I just pick up an ECU from you for less than $185, since you wouldn't have to ship?

 

check your pm

 

The Skunk2 IM is basically and exact copy of the ITR IM.
It will run, but in the mid-range, specifically 4400 - 5700 RPM, it will lag.

In the B18C1 the IAB changeover point is 5750RPM. High torque at low RPM is achieved when the valves are closed forcing air to take a longer path. Whereas high power at high RPM is achieved when the valves are opened allowing the air to take a shorter path. The ITR/Skunk2 manifold only has the shorter path for high-end power.
In turn, the VTEC point is tuned to make the most power depending on the capabilities of the IM. This is why the VTEC changeover point in the Type-R is 5700 rpm, compared to 4400 rpm on the GS-R. The reason is mainly because the intake manifold works differently.

Anyone who has ever done an OBDII -&gt; OBDI conversion on a B18C1 without changing the polarity of the IAB (they changed it from OBDI-&gt;II) can tell you that there is a lag until it gets to the point the IAB normally activates to the other runners at 5750 RPM. Without the IAB working, you are basically using an ITR/Skunk2 manifold.

Sooo, to make it work properly and have all the power you can at all RPM, you need either a P73 OBDIIb (ITR ECU) or a chipped ECU and a OBDI-&gt;OBDIIb conversion harness. A P72, P28, P30, P61, P08J, P30J, & P72J can be chipped to work with your setup. With a chip the P72 won't send a IAB signal. I would recommend a VTEC crossover point around 5700, unless you've done internal mods. Then you need to tune it to find the best point.

Check out Hondata & more importantly PGMFI.org

 

RoaringTurtle made more midrange on his old stock B18C1 with a skunk2 mani with the X-over at 4400 than it did at 5700.

Up the X-over if you have cams.

 

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

In the B18C1 the IAB changeover point is 5750RPM. High torque at low RPM is achieved when the valves are closed forcing air to take a longer path. Whereas high power at high RPM is achieved when the valves are opened allowing the air to take a shorter path. The ITR/Skunk2 manifold only has the shorter path for high-end power.
</TD></TR></TABLE>

You sure it has nothing to do with the cams what-so-ever?

 

skunk2 IM and your facotry P72 GSR ECU will be fine

 

BIG thanks, Zuul. Very clear, now I got it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wayne99GSR &raquo;</TD></TR><TR><TD CLASS="quote">skunk2 IM and your facotry P72 GSR ECU will be fine </TD></TR></TABLE>
exactly.

miss-information