ctr cams in b16a2 question


1600_dohc

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Oct 16, 2015
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Ive put ctr cams into my a2 and the vtec crossover isnt ny more aggresive ive a big exhaust leak at the manifold were it bolts to the head and still have a cat and standard itr exhaust wud this dull down the crossover sound with the cams in it ??
 
Is it not advised that you swap the valve springs aswell on an a2 when putting b18c cams in?
I wouldn't expect the sound to be any different tbh.
 
Is it not advised that you swap the valve springs aswell on an a2 when putting b18c cams in?
I wouldn't expect the sound to be any different tbh.

Its advisable IF you up the rev limit. You can get away with stock springs if keeping the stock A2 rev limit.
To get the most from the cams, the car will need mapped to suit.
I remember when I fitted mine, the crossover sounded more sharp without mapping.
 
u need more revs to make the b16b cams to work. compared to stock b16a2 cams. that means u have to change valve springs to b18c6/b16b springs at least :)
u will need a remap to make the most of the b16b cams
Carsten
 
Im plannin on getting a ek9 ecu for it but already noticing a big power difference over a2 cams pulls harder in vtec now
 
i would recommand hondata s300 or equal instead. where u really can make the most of ur changes in the engine.

Carsten
 
Type R cams only need valvetrain if your reving over the b16a limit of 8400. But then the type R only rev to 8600 B18c and 8800 b16b so for the tiny extra 200-400rpm I doubt the difference is worth while the extra hastle. You would also need a Type R intake manifold and decent exhaust to have the setup to make those gains in the higher rpm. Simplest and cheapest option worth the money would just be to get it mapped with the Type R cams an keep limiter of 8400. IF you decide you Really Must have those extra few hundred RPM and 4-5hp then get the valve train and give the head a mill for extra CR while at it.
 
When i had my 16a mapped with 16b cams it never made power past 8k. So what KeiranEG6 is saying is correct and true.
 
Right ive the b16b cams in and the type r wvu when i start it from cold it idles at 2000-2500 and when it heats up its a litle over 1000 anybody any ideas y ? I was told the idle lobes on the cams are the same ? But its only since the ecu went in
 
I ran a b16a1 with a full Mardi Gras motorsport (works honda at the time) build and blue print with b16b cams and ecu. The head was ported and polished and very skimmed. Way past tbe service limit.

It ran brilliantly. Sadly it leaked oil and over a 40 min race I lost too much and blew it at Donny.

If you dont use dual springs, dont use the type r manifold. That sets how high the power peaks.
 
Right ive the b16b cams in and the type r wvu when i start it from cold it idles at 2000-2500 and when it heats up its a litle over 1000 anybody any ideas y ? I was told the idle lobes on the cams are the same ? But its only since the ecu went in

Think you missed something there. Don't run the Type R ECU as your stock Valve springs will not take the higher rev limit. Just leave your B16a ecu in until you get it tuned.
 
Ye was thinking off changing ecu back because off the standard valve springs just needed a confirmation ha. Have b16a got standard dual valve springs on the intake side read on a forum they do ??
 
Dual is not the rating. The B16a springs are not strong enough. The Type R ones are stronger to suit the higher revs and lift.
 
How much wud a set b roughly and is ig a head off job to replace so the valve dont frop onto the cylinder
 
No need to remove the head, there is several tools available that will allow you to swap them out with the head in place.
 
Well my b16a2 with ek9 cams/valve train b18c6 tb/intake manifold made peak power at 8500 real rpm, if i was running stock ecu i would never have got the rpms it takes to reach max power
and Yes offcourse u need a good exhaust/intake setup to make the best power/torque from the setup:)
 
Im going to look into dual springs and a decat are b16b intake mani much different to b16 ?
 
B16b and B18c inlet manifolds are the same casting, the B18 manifold is port matched to the larger throttlebody though.
 
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