Jowee

I was thinking about getting some 00 ITR cams for my GSR swap and was wondering how many of you guys just swapped the cams without the valvetrain. I'm not planning to rev past the stock ecu, but just want a little more power.

How many of you guys are running or have ran ITR/CTR cams on stock internals?

I've been told I could just add inner valvesprings to the exhaust valves and be safe. What do you guys think?

mmuller

You'll be ok if you keep stock redline. If you gonna take the head apart, then change all of the springs, not just the inners.

Revhard92si

Running itr cams in a gsr is perfectly fine. Just install the cams and go. You don't need to change springs or anything. You'll have no problems taking it to 8500. That's if your ecu lets you.

gsrvx

Might want to raise your VTEC. Stock crossover for me resulted in lag/boggin. Right now set at 5600.

Valvetrain should be good. Hell...I've actually hit 9300 plenty of times

mingbling

i just installed ITR cams on my stock gsr. kept my butterflies working and it drives good. good low end torque.
About to swap the manifold for a skunk2 soon.

Kataku2K3

It sort of depends on the chassis you are working with but I too would recommend swapping ECU's... As I've said 1000's of times I personally hate the stock P72 ECU as it's VTEC is too low (especially for ITR/CTR cams) and it's mapping is ****... If you're working on an OBDI chassis I would go with a chipped P28 or even chip your GSR (I'm really not into ECU chipping but the only proggy I've come to like is the SK2 with the 5700 VTEC x-over... PYR, Mugen, Spoon, etc. all suck)... Even if you have an OBDII chassis, you could still run either of the ECU's with a jumper... What I most commonly do with '1996-98 Civic's or '1996-99 Teg's is just recommend a '96-99 JDM ITR ECU... It makes the world of a difference, trust me... I really doubt you'll even see much gains from the cams till you bump up your VTEC a bit... Sorry to babble on so long off topic but it truely does make a HUGE difference... As for the stock valvetrain, we've taken them to ~9000rpm (mis-shifting, etc.) but there's no reason to be up there under normal conditions as your power is already taking a dip... Just my $0.02

alfaaay

Get the valvetrain if you can, just for added security. You don't want to be like me and bend your valves or throw your car out of whack (mine kinda runs like sh*t right now) . If you're trying to save a little cash, you can move your GS-R intake springs to the exhaust side and just get ITR intake springs.

Jowee

Are the ITR intake springs stiffer than the GSR? Couldn't I just get ITR exhaust springs and just replace the exhaust instead of moving everything around?

IS3Fifty

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alfaaay &raquo;</TD></TR><TR><TD CLASS="quote">Get the valvetrain if you can, just for added security. You don't want to be like me and bend your valves or throw your car out of whack (mine kinda runs like sh*t right now) . If you're trying to save a little cash, you can move your GS-R intake springs to the exhaust side and just get ITR intake springs. </TD></TR></TABLE>

I agree nothing wrong with an upgraded valvetrain. In the future you could run a little more powerful cam if you decide to.

alfaaay

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITR 98 1162 &raquo;</TD></TR><TR><TD CLASS="quote">Are the ITR intake springs stiffer than the GSR? Couldn't I just get ITR exhaust springs and just replace the exhaust instead of moving everything around?</TD></TR></TABLE>

GS-R intake springs = ITR exhaust springs

Jowee

So are the ITR intake springs any better than the GSR?

Y2K Si FBP

itr cams with a proper ecu will give a gsr motor a niiice bump in the midrange..mediocore in the high end..it's a good value per hp for solid relaible all motor power.

i had these cams in my gsr motor and took them to 8400 rpm quite a bit.

3 yrs ago in a stock b16..8600ish.

for keeping stock redline..stay wit stock valvetrain. you will be fine.

and buy my cams

alfaaay

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITR 98 1162 &raquo;</TD></TR><TR><TD CLASS="quote">So are the ITR intake springs any better than the GSR? </TD></TR></TABLE>

Yeah, they're stiffer. If you run those, you should be safe up to a little over the ITR redline.

Seedc2

iTrader: (1)

whats the best option for a 98gsr OBDII? going to install 00' ITR cams. What program should I run (im not too familiar with what program is good or bad)? Like mentioned above should I just get the stock jdm itr ecu?

alfaaay

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kendogg &raquo;</TD></TR><TR><TD CLASS="quote">whats the best option for a 98gsr OBDII? going to install 00' ITR cams. What program should I run (im not too familiar with what program is good or bad)? Like mentioned above should I just get the stock jdm itr ecu? </TD></TR></TABLE>

If you get an ITR ECU, or anything that's not a p72, your car will not run right since none of those ECU's are set to recognize the GS-R's "dual-stage" VTEC. On top of that, a "program" might give good gains, but you'd get more gains from having a fuel/vtec controller and adjustable cam gears.

Seedc2

iTrader: (1)

Okay im gonna give you a scenerio. Say I decide to get a skunk2 IM (in conjunction with my itr cams) what would you recommend me doing/getting exactly. Just list them and vice versa without a skunk2 IM. Keeping in mind best bang for the buck.

if it matters. current setup on stock b18c1
-(to be installed ITR cams)
-comptech icebox
-jdm 4-1 header
-smsp 2.5" cat
-greddy evo catback

GOLDBERG

is there any difference between the usdm and jdm itr ecu?

alfaaay

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kendogg &raquo;</TD></TR><TR><TD CLASS="quote">Okay im gonna give you a scenerio. Say I decide to get a skunk2 IM (in conjunction with my itr cams) what would you recommend me doing/getting exactly. Just list them and vice versa without a skunk2 IM. Keeping in mind best bang for the buck.

if it matters. current setup on stock b18c1
-(to be installed ITR cams)
-comptech icebox
-jdm 4-1 header
-smsp 2.5" cat
-greddy evo catback</TD></TR></TABLE>

Since you're getting a Skunk2 IM, there won't be any butterfly issues so you'd be free to run the ITR ECU if you wanted to. I don't think you'd see any gains from just an ECU. The ITR one would just let you rev higher and your VTEC would be activated whenever the ITR's VTEC is. Your best bet would be to find an OBDI ECU (a few people sell them on here) + conversion harness (if your car isn't already OBDI), and a Hondata. You can get a reprogrammed ECU to have fun with, but you won't see as many gains as you would from dyno tuning.

...hope that makes sense, I wasn't exactly sure what you were asking.

Kataku2K3

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alfaaay &raquo;</TD></TR><TR><TD CLASS="quote">I don't think you'd see any gains from just an ECU.</TD></TR></TABLE>
Not that I really care but you're wrong here. I'm not saying that the absolute best thing to do would be to run a JDM P73 but it's definately a simple setup that works well. I would take it over a lot of chipped P28 progs (as I've said many times before I hate PYR, Mugen, Spoon, Jun) anyday for a relatively stock setup (something like what we're talking about). It also is basically an OBDI ECU as you will NOT get any OBDII diagnostics from it and lacks input for several sensors (CKFS, SHT02S, VTM, etc.). I'll tell you on my friend's B18C1/EJ6 (and a couple other similar setups) it makes all the difference in the world. It's nothing special at all but his setup is composed of a '98 B18C1, CTR IN cam, SK2 IN manifold, JDM ITR header, ACT clutch, S4C tranny and on the same surface that the tires (Yok. ES 100's on 15" Circuit 8's) wouldn't break loose with the stock P72, they easily spin with the JDM P73. Like I said it's not that big of a deal but the ECU definately is. You could go with an OBDI ECU and Hondata but that really is overkill for a setup similar to these. If I get some time later I'll put Albert's (B18C1EKhb) EJ6 on the dyno and do a comparison of the ECU's... Just my $0.02

alfaaay

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kataku2K3 &raquo;</TD></TR><TR><TD CLASS="quote">
Not that I really care but you're wrong here. </TD></TR></TABLE>

Hmmm... well thanks for the heads up. As far as I knew, it didn't make a difference.

GOLDBERG

does the p73 have the secondary o2 sesor input??

Katman

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">does the p73 have the secondary o2 sesor input??</TD></TR></TABLE>


Not on the JDM P73.
only the US P73 is programmed to look for two 02 sensors.

Katman

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kendogg &raquo;</TD></TR><TR><TD CLASS="quote">whats the best option for a 98gsr OBDII? going to install 00' ITR cams. What program should I run (im not too familiar with what program is good or bad)? Like mentioned above should I just get the stock jdm itr ecu? </TD></TR></TABLE>

If you stick with your GSR ecu, it would be best if you bought a VTEC controller and bumped vtec up to about 5300rpm. Stock GSR vtec crossover varies between 4400-5000rpm depending on load & certain variables. The reason for keeping your GSR ecu is because it controls your secondary butterflies, whereas an ITR ecu would not, and you would lose about 10ft lbs. of torque because of inactive secondary butterflies. Those butterflies help create low-end torque and its a good idea to keep them active if you're still using your GSR intake manifold.

Now if you upgraded to a Skunk manifold, theeen using an ITR ecu would be the better choice, because there are no secondaries in a Skunk manifold. Bumping vtec up to 5700rpm would be recommended as well, when using a Skunk manifold, to mimick an ITR head setup.

sorry if this redundant information ...it seems some people on here have their info jumbled up.

Katman

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GOLDBERG &raquo;</TD></TR><TR><TD CLASS="quote">is there any difference between the usdm and jdm itr ecu?</TD></TR></TABLE>

Yes, the US P73 ecu will make a tad more power over the JDM P73.

I've dyno compared either type's of ITR ecu's on a friends stock '98 US ITR back in '99.

Here's the dyno graph:
http://www.ff-squad.com/tech/d...o.jpg

(ignore the single green line on the graph)

The dyno test was comparing an OBD2 Spoon ecu, US & JDM ITR ecu's.
The OBD2 Spoon ecu pretty much prevailed over both ITR ecu's.

In contrast, there *may be* different dyno results if using a stock JDM ITR engine with a JDM + US ITR ecu & spoon ecu.

Nickolas Xiong

Can I run 440cc injectors with Itr cams on a stock B16 head with a Chipped Ecu with B20v base map???