Doing a B20 Vtec build and recently bought a 2000 ITR Intake camshaft because I got a great deal. I was originally going to run stock B18c1 cams but that changed with the itr.
My question being: Would running an ITR exhaust cam over a GSR B18c1 Exhaust cam be
a noticeable difference??

Cause if it isn't going to make that much of a difference I'll just run the GSR and save the money I was going to spend on an ITR exhaust cam and put it towards something else. Thanks for any info you can give me.

 

Somebody?

 

Exhaust air has to leave for intake air to enter the engine. Since intake/exhaust are two sides of the same coin, I think an intake cam upgrade won't do much for you if you don't properly match it with your exhaust cam. I'm not speaking from experience here, but I'd think an ITR exhaust cam would be a worthwhile investment.

 

Not noticeable when you are driving; probably a couple of hp over the whole tq curve, as it is a larger cam. Only upgrading one cam just isn't going to do a whole lot.

 

Well I actually be upgrading from stock b16 exhaust cam to stock b18c1 exhaust cam. The cam profile
for the b18 is an upgrade isn't it? It does make sense that the itr cans would work better when paired
together though. Just want to know how much of a difference and if it would hurt or be detromentle to
stay with the b18 ex. Cam? Thanks for the input though.

 

The GSR cam will be better than a b16 cam. Not by much, but its worth the 20-30 min it takes to install it and adjust the valves.

 

I am amazed how many people here are saying that without the exhaust cam you won't see any good gains. This is entirely NOT the case. I have personally installed ONLY the intake cam on several setups without touching the exhaust side. I can assure you its unmistakeable that there are gains to be found from just the intake side alone.

 

Alright this is what I want to hear. From someone who has actually installed one and knows. The valvetrain is going to be all skunk2 (valves,springs and retainers) and a mild port and polish. Both cams have low miles itr intake and the gsr exhaust so with this set up i should see a difference then?
I also have dc header and intake along with b20 beefed up block.

 

In his "Honda/Acura Engine Performance" book, Mike Kojima claimed 6-8hp gains from switching only the intake cam to Type R.

 

First, he is talking about the exhaust cam, not the intake.

Second, I have never seen more than a few hp on the dyno from just a slightly bigger intake cam. The sound changes noticeably and the vtec crossover is more noticeable until it is re-tuned, but I have never actually measured much more than a few hp increase.

What were the specific increases you measured on the dyno and what else was done to the motor?

 

I think this is his situation, but I'm not sure: has an ITR intake and is trying to decide which exhaust cam to get.

While it's true that you can gain power by installing just an ITR intake cam, the cam is going to perform much better with an exhaust cam. If you were expecting a 15 whp increase from the cams, and intake gives you 7 all by itself, that means adding the exhaust will get you another 8. Just putting an exhaust cam on (with GS-R intake cam) wouldn't net that much of a gain, but these things work like a system and it's best when both parts are there.

I mean, you could port your intake for only two cylinders and you'd see an improvement, but why would you want to half-@$$ it? Same with the cams. Especially since you invested in a Skunk2 valvetrain, you might at least begin to take advantage of it by having a properly matched set of cams. And why bother with a port and polish if you aren't going to properly build the most important component in the head?

 

I still stand by this post. Its worth the few minutes to install if you already have it, but I wouldn't go buy one in this situation.

 

If you have all that money in the head you might as well get a real set of cams so you can get the best results. You have full Skunk2 valvetrain yet you wanna skimp out on the EX cam?

 

I also ran CTR intake cam gsr exh. and saw improvements. ITR exh. cam in the mix will only be a few hp gain 2-3 id say depending on your setup its up to you whether or not its worth it

 

Actually it's not that I'm trying to cut corners,with all builds it comes down to one thing:MONEY. If I had thousands to spend I'd have killer build but right now it's about saving money where I can to finish my build. I've read several build write ups where they matched different cams and got some nice HP from them. What I'd like to know is, how big of a difference it would be if I ran the b18c1 exhaust cam with my 2000 itr intake can instead of an itr exhaust is it really going to hurt my build performance wise that much. I think Honda makes great stock cams. I wish someone could answer who's actually run this set up. But don't get me wrong I'm taking everyone's opinion into play here. Thanks.

 

Search team-integra.net; there's been some discussion on single ITR cam setups there. There probably has here, too, but this forum is a PITA to search. The number 6-7 whp gain sticks in my mind. As far as money goes, I hear you because I'm in the same boat. Stretching your money requires research, and that's what you're doing. If you really want to save money, my advice is this:

You've already got an ITR intake cam. Spend the money to get the needed ITR exhaust cam, and get one set of ITR intake valve springs (or a full set of aftermarket springs if you can find them cheaper). Skip the valves and retainers and save money for a tune. If you've got money left over, spend it to complete your breather mods, if you haven't already. That means CAI, high flow cat, header, and catback. When you've done all you can do and still have money for a tune, get that done. The tune will net more whp than the cams did. Next, think about a new IM, fuel injectors, or a port and polish. That's just my opinion, but it's how I'm executing my strapped-for-cash build.

Don't forget the adage that the head makes the power, and don't forget that the cams are the MOST important factor in determining how much air an engine can move (after tuning).

 

Thanks dude I appreciate the advice. Not a huge fan of this site because if you don't know everything you get ripped to shreds. I thought that was what a forum was for-help/advice.
Here's my build so far,my first b series build so be kind.
B20b block,stock bore,stock crank,scat rods with around rod bolts,arias hi comp pistons,b16a2 head,with skunk2 valves,springs,retainers. Got an aem v2 cai,DC gsr header,itr Im. You know what I'm thinking with cams. May take your advice and splurge for the itr exhaust cam. Appreciate your opinion,there are still some good peeps still on this forum. Thanks dude.

 

With your proposed build you could take advantage of a much larger camshaft selection for not a lot more than you would have in skipping the exhaust cam and selling your ITR intake cam. Something like a skunk2's tuner stage 2 has proven to be a great cam in builds similar to yours.

 

Yeah I thought of that,but I just got a great deal on the itr cam and couldn't
pass it up. Eventually that's what'll probably get put in. Being broke sucks. I have
heard good things about the itr's too. My final goal is to have a finely tuned Crx si 230 horse
daily driver.

 

If you want to sell your itr intake cam ill buy it lol, or if u want to buy my itr exhaust cam you can

i have a gsr intake, itr exhaust

 

Specific increases? Never went to a dyno and did back to back results. You can definately TELL a difference. Run somone before the cam, change the intake cam, go back and run again. I don't have the time/money to hit up the dyno every time I make one change. I guess because I don't have an official dyno print out that I obviously was hallucinating and didn't actually gain anything.

 

There's no need to act like a punk; I was asking a legitimate question.

As I said, I have swapped those cams and had the car sound faster and the VTEC crossover felt more obvious, but on the dyno it really wasn't much of change. If you believe it made a difference that's fine, but there is no reason to get your panties in a wad because someone asked you how you came to that conclusion.

 

Its not about what I chose to believe, its about what my personal experience has shown me. You run someone, you loose by 1 car to 100mph on the highway from a 20mph roll (example)... you go home and install a CTR cam. You make no other changes. You run the same car, from the same 20mph roll to 100mph and now your cars are even. Obviously there has been an improvement in your car. Wheather you feel it or not, it has made a difference for the better. Agreed?

 

I think everyone can relate to what you're saying but the problem is that your experience is somewhat subjective. In a debate like this, quantifiable data is ideally what everyone wants to see since butt dynos and street races only mean so much no matter how you look at it. I'm sure adding the ITR cam will increase power but without someone having specific data from a dyno, it makes it very difficult to say he should or shouldn't purchase the ITR exhaust cam as well.

I personally think he should do what Natural Aspirations suggested and sell the cam and install some used S2S2 tuner series cams.

 

Yeah butt dynos and street races FTL. You gotta have 1/4 mi. or dyno data to really back up performance-related changes.

From only a couple sources I've read an ITR intake cam can give a 6-7 hp increase on a B18C1. That's an improvement, but not as much of an improvement as you can get by putting on a properly matched set of cams.

If I were the OP I'd sell the ITR and put the money towards a set of Blox A, B or C ($350 for the set), or get an ITR exhaust cam to pair with the intake cam.