I am toying with the notion of "dropping in" a CTR intake cam into my B20/VTEC. It's a B16 head from '89. I just had a 5-angle valve job done on it with new OEM seals from Honda. I dropped in a pair of '98 GSR cams and bolted it all back up, but now I'm thinking I want more NA power from this OEM parts build. I am not looking to go aftermarket because I may compete in H1. I know that Honda engines come with dual valve springs already on the intake side, but is this cam too aggressive for these springs and retainers (especially given the age)? They are fresh from the machine shop but I don't want this engine to blow quick. Otherwise, if some of you have gone with this setup (CTR int., GSR exh.) with stock valvetrain I'd love to hear about it!

 

It's safe to do as long as you don't rev higher then the stock redline, also tuning should be done for this.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ***$nyper &raquo;</TD></TR><TR><TD CLASS="quote">It's safe to do as long as you don't rev higher then the stock redline, also tuning should be done for this.</TD></TR></TABLE>
The stock redline of what? A CTR or a GSR? I wasn't planning on going past 8200 (when the CTR stops making power)

 

The stock redline of whatever valve springs you are using. Also make sure you have dual valve springs on the intake side before you put that cam in.

 

CTR cams stop making power at 8200, which is (correct me if I'm wrong) the redline for a B16a, so to play it safe, I should set my rev cut to 8200 and CEL shift light to 8k? It's going to be awfully tempting to rev all the way up to 8200 but I guess I shouldn't if I want to have longevity form the engine...

 

I had a ctr intake cam in my stock gsr head for around 30k miles, I took it to 8400-8500 all the time.

But i am probably really lucky nothing ever happened.

 

want my opinion. even honda added dual valvesprings with those cams, from the factory. I wouldn't use the cams without them.

Could it work, probably.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by junkyard racer &raquo;</TD></TR><TR><TD CLASS="quote">want my opinion. even honda added dual valvesprings with those cams, from the factory. I wouldn't use the cams without them.

Could it work, probably. </TD></TR></TABLE>

Intake side has dual valvesprings y0

Its the exhaust side that doesn't.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BMo Tuning &raquo;</TD></TR><TR><TD CLASS="quote">I had a ctr intake cam in my stock gsr head for around 30k miles, I took it to 8400-8500 all the time.

But i am probably really lucky nothing ever happened.

</TD></TR></TABLE>How did it run? A lot quicker than the GSR cam?

 

[QUOTE=SolAssassin] CTR cams stop making power at 8200, which is (correct me if I'm wrong) [QUOTE]

I have stock 96-97 ITR cams and the CTR intake cam is a bit more larger then mine. On the dyno my car stopped making power after high 8500ish If I remember correctly or even 8600 rpm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SolAssassin &raquo;</TD></TR><TR><TD CLASS="quote">How did it run? A lot quicker than the GSR cam?</TD></TR></TABLE>

I felt a little difference on a stock B16A2 with CTR intake/exhaust cam. Car was never tuned, but the person was running a 96-97 ITR ecu..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SolAssassin &raquo;</TD></TR><TR><TD CLASS="quote">How did it run? A lot quicker than the GSR cam?</TD></TR></TABLE>

Ran well, the AFR changed a **** ton after install of the CTR intake cam so you could see it def. drew in more air.

I never dyno'd my usdm gsr block but with a nicely setup jdm gsr block and a stock port gsr head i hit 182whp with just the ctr intake cam, skunk2 manifold, hytech replica header, 2.36" catback and a 3" intake.

 

So, are you really thinking about running 19 year old springs with larger cams in H1? I can repair broken heads, but 19 year old heads do not weld good. I would buy a spare.

 

I just double checked on my dyno graph, my CTR cams peaked at 7600rpm in my GSR. The car can rev up to 8600rpm, I'm running ITR valve springs and lightened rocker arms. Not sure about the power you guys have 8200rpm.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OH_1fstgsr &raquo;</TD></TR><TR><TD CLASS="quote">I just double checked on my dyno graph, my CTR cams peaked at 7600rpm in my GSR. The car can rev up to 8600rpm, I'm running ITR valve springs and lightened rocker arms. Not sure about the power you guys have 8200rpm.</TD></TR></TABLE>

is your dyno basically flat after 7600? also how much compression do you have? i'm just getting my engine back togeather but speculate that it will fall in the 180-185whp zone.

 

The torque is flat up to that point and starts falling off. My compression is 11.6:1. I made 182whp with my set-up.

 

I would get some ctr valvesprings just for added safety. Those old springs might float on you

 

I had a ctr intake in my gsr for like 25k and redlined at 8300 stock valvetrain and when i was doing burnouts my rev limiter was at 8400. Nothing wrong happend and Yes I felt a gain of power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jintegragsr97 &raquo;</TD></TR><TR><TD CLASS="quote">I had a ctr intake in my gsr for like 25k and redlined at 8300 stock valvetrain and when i was doing burnouts my rev limiter was at 8400. Nothing wrong happend and Yes I felt a gain of power.</TD></TR></TABLE>

So your rev limiter changes whenever you do a burnout?

he has a head that's older than some of the people on this forum.

 

ive been running 00-01 itr cams (same as ctr) on my 91 b16 head (100% stock head outside cams) on my b20vtec for 5 yrs now, no problem.

 

... My rev limiter was at 8400 but when ever i raced i never took it to 8400, I took it to 8300 the most to be a lil safer. But when I was doing burnouts I didnt know my rev limiter was at 8400 so it ended up going all the way up to 8400 while doing burnouts. So what I'm trying to say is that my car is still fine after heavy burnouts reving to 8400 with stock valvetrain.

 

Did you ever dyno that setup? I'm thinking about putting a ctr intake cam in my stock gsr. All it's got is a 3" intake, shitty DC header and soon a skunk2 pro intake manifold...2.25" exhaust. Right now as it sits with stock everything(besides, header, intake and exhaust), it's slow as ****. Got my *** handed to me by a formula firebird.

 

Well as far as I know gents, CTR/99-01 ITR cams make power up to 8845. B16 cams stop making power around 7800 or so.

The cams are safe on stock valvetrain as long as you go only as high as the stock GSRrevlimit as was previously said. I took my ITR cam to 8333 all the time in a stock B16 head.