B18CR 98 SPEC Mod Recommendation?

[VTec1987]

NO I don't want a 2.0L bottom end, wanting to do it at one point but I have drifted away. I want to keep the OEM spec

Currently havebasic mod IHE and have hondata s200 ready for tunning after my next mod

Big Tube Tri-y
2.5inch catback
Fujita Intake
Hondata S200
65mm TB ( not used yet)

My question is what is valve for the money that gives better results

CAMs or ITB?

Tunning is a must, waiting to do the next mod before i tune it.

What would u guys recommend? Been reseaching on the forum but no luck, only found bc3 cams used by vinny, but the thing with bc3 cams, they are just light bigger cams then type r cams.

Any advice would be good guys

thanks in advanced

[fatboyz39]

Ditch the big tubes. Get something like toda or hytech tri-y's.

If you want to keep it legal then keep stock manifold.

[jks24]

what car that engine going in?

[dougie_504]

I don't think there's any point doing ITB's until you've had the head built up nicely. At the moment I don't think there's a huge need for larger air intake, the stock head can only breathe and burn so much and a good CAI (like Fujita) should cover this no problem (pros correct me if I'm wrong here please).

I recommend head work next.
- Valves
- Valve springs
- Titanium retainers
- 3-angle port grind
- Stage 2 or 3 cam shaft
- Cam gear

With a good tune you'd get another 15KW +/- for sure. You can also replace gaskets and clean/recondition the head while you're in there if you want.

[Chr1s]

You need to get her breathing.

Free up your intake and exhaust, get a set of cams in there with supporting headwork and tune it till the cows come home, does that even make sense? :p

These motors love to breathe.

[ewendc2r]

.... I hear time and time again that ITB's won't produce results on a relatively stock B18CR engine which runs comparable compression to a 4AGE 20V which comes FACTORY EQUIPPED with ITB's. Don't you think that they would've omitted this item if it in fact, didn't provide benefits that offset its cost?

At the end of the day I have seen several ITB'd B18 motors -- Some are shit, some are FANTASTIC. The shit ones are installed on the cheap, tuned badly and shit design (sticking buterflies etc)..

The good ones have MASSIVE midrange gains, and reasonable top end gains.. Depends what your goals are, but I want TORQUE over HP anyday of the week, its all about area under the graph.

If you then go and cam the motor, you will see increased benefit & again with increased compression after a rebuild. But it is a part that effectively doesn't wear out --- Remember that.

Personally, I'd go ITB as throttle response and midrange is more important to me than an overall increase in Peak HP figures... Anything more than Toda B is probably not appropriate for a stock bottom end B18CR motor..

With regards to ITB's you can actually use the 4AGE design and get a fabricator / welder to join the intake flange and some custom length bells / trumpets .. This is a cheap way to get quite a good result. I think the TODA design is actually very similar to the 4AGE setup in any case...

[geeang]

I don't think there's any point doing ITB's until you've had the head built up nicely. At the moment I don't think there's a huge need for larger air intake, the stock head can only breathe and burn so much and a good CAI (like Fujita) should cover this no problem (pros correct me if I'm wrong here please).


Unsubstantiated opinion.


.... I hear time and time again that ITB's won't produce results on a relatively stock B18CR engine which runs comparable compression to a 4AGE 20V which comes FACTORY EQUIPPED with ITB's. Don't you think that they would've omitted this item if it in fact, didn't provide benefits that offset its cost?

At the end of the day I have seen several ITB'd B18 motors -- Some are shit, some are FANTASTIC. The shit ones are installed on the cheap, tuned badly and shit design (sticking buterflies etc)..

The good ones have MASSIVE midrange gains, and reasonable top end gains.. Depends what your goals are, but I want TORQUE over HP anyday of the week, its all about area under the graph.

If you then go and cam the motor, you will see increased benefit & again with increased compression after a rebuild. But it is a part that effectively doesn't wear out --- Remember that.

Personally, I'd go ITB as throttle response and midrange is more important to me than an overall increase in Peak HP figures... Anything more than Toda B is probably not appropriate for a stock bottom end B18CR motor..

With regards to ITB's you can actually use the 4AGE design and get a fabricator / welder to join the intake flange and some custom length bells / trumpets .. This is a cheap way to get quite a good result. I think the TODA design is actually very similar to the 4AGE setup in any case...

Great advice with information to back it.


I had A-sport ITB's slapped onto my 100% stock JDM B18C(R) and the midrange gain was ~20kw, turned the beast into a completely different animal.

Sure there's a ~5kw sacrifice at the very limit, but compare that to a 20kw gain in the midrange I wouldn't look back.

Green line - JDM B18C(R) with CAI/similar headers + exhaust (it might have had skunk2 IM + TB but I'm not sure)
Red line - Same engine with A-sport ITB's/similar headers + exhaust

http://img.photobucket.com/albums/v352/viet_mafia/_DSC7403.jpg

[ewendc2r]

The above graph is absolutley what I am talking about -- You will feel midrange more than Peak Power.. And look at the area under the graph (Which = Acceleration for those who don't know), the lower Peak HP engine has considerable additional area everywhere but for the last 1000rpm or so.. In fact, you could probably shift at 8000 rpm (approx) and retain close to the same acceleration as the other car which has to go to rev limiter each gear because its peakier. My point is it is also easier on the engine to provide, in the end, similar speed results.

Of course --- The benefits then of a well ported head, increased compression and Toda C cams would be better realised.. Treat ITB's as the BEE'S KNEE's OF INTAKE UPGRADES FOR YOUR NA OR FI CAR.. Remember, GTR (King of response, twin turbo yada yada) comes with ITB's factory so there is still a benefit clearly.

Now -- If only I could find a set of ITB's on the cheap ... Oh why is there ALWAYS money to be spent.