B16A auto and manual

[D_clothes]

Arlo everyone can somebody tell me is there a diffrence in
B16A auto and manual in the sense of HP and when the vtec kick in ...
and other stuff which i might don't know about ?

 

[xerofighter]

power on engine is the same. but you will lose a lot through the torque converter of the auto. so power at wheel will be lower. but i am just stating the obvious.

 

[soulfly]

some people confirmed that the automatic b16a had less wilder intake cam, with single valve spring and lower rev limit. i'm not so sure about the differences regarding the cam duration, but for sure it had only single valve spring for the intake, while manuals got it double.

everything else are exactly the same.

but i don't know whether the situation is applicable to both big V and small V.

 

[D_clothes]

No wonder they are saying that the auto B16A vtec kicks in at 5800 rpm and ends at around

7000rpm... if that is the case . What can be done to improve the situation .



and also if is only single valve , aint it the same as a small V ?



really really blur man . i thought all b16A with the big Vtec word on the engine is the so call big V which comes in DOHC with double valve .



Can some one confirm this for me ?

 

[minivan]

Auto DOHC VTEC cams have the weakest profile out of the b-series cams... this is one of the things people forget when they convert from auto to manual... you should also convert the cams to a manual cam...
Someone earlier posted an article on VTEC cam ID... the article writer said he was'nt gonna bother with the DOHC VTEC auto cam coz "they SUCK"... :D

 

[D_clothes]

thanks for the info .. so if wanted to change we can still change the cams and valve together rite ?

 

[soulfly]

the valve is same... it's just the valvespring

 

[KeonG]

Auto DOHC VTEC cams have the weakest profile out of the b-series cams... this is one of the things people forget when they convert from auto to manual... you should also convert the cams to a manual cam...
Someone earlier posted an article on VTEC cam ID... the article writer said he was'nt gonna bother with the DOHC VTEC auto cam coz "they SUCK"... :D

nice info man.. thx!

 

[D_clothes]

izzit changable ?

 

[hattech-v]

which one u mean changable? if cam, then yes, it can be changed.

b16a auto to manual need to change ecu or not?

 

[D_clothes]

the valve spring i mean izzit changeable . i know converting an auto b16a to a manual one we need to change for sure the transmission and also the ECU . but the single cam and valve spring as well ? then an auto B16A is not a dohc but a SOhc ?

Actually can someone make it simple i am blur now ...
B16A auto have diffrent cams and diffrent valve spring ?

and if it is single valve spring then y izzit call a DOHC ?

heLp help help ! ! ! ! .....
the things is i want the auto transmission to remain but yet i want it to be a manual b16A is that possible ( meaning having the same time as the manual when opening its Vtec and to be able to REv as high as a manual B16A )

 

[soulfly]

Actually can someone make it simple i am blur now ...
B16A auto have diffrent cams and diffrent valve spring ?

B16A auto has single valve spring on both intake and exhaust cam
B16A manual has double valve spring on the intake cam, but single valve spring on the exhaust cam

Single valve spring does not mean that it is a single camshaft engine. Those are two different things.

B16A auto has less wild cams than a B16A manual, thus producing only 155hp at the crank, with the setup of automatic tranny and automatic ecu. However, I've heard somewhere that only the intake cam is different, the exhaust cam is the same as other B16A. But so far, from the sources found on the net, they only mentioned about 2nd gen B16A auto. Regarding 1st gen B16A auto, it was never mentioned exactly how different it is from a 1st gen B16A manual.

 

[D_clothes]

so izzit possible to change the single valve spring to a double valve to achieve the same hp for the b16a (auto) which waz mention is one of the diffrences between a B16a manual ?

i beeen searching on the internet for the diffrences but with no luck .
but thanks to all for all ur opinion . Really educate me alot .... if u all still have more to share to tell me the diffrences plz do tell . i am stilll wondering y , the b16A Vtec kick in so late n only last until 7000 rpm , izzit bcoz there is a rpm cut or is bcoz of the ecu or other reason plz do share .. bcoz i getting my car soon and would like to know more about it

 

[soulfly]

changing the spring does not increase hp, but it will allow you to rev a bit higher than with single spring

the stock vtec point is meant to be set at particular rpm because it is the best point to suit the cam profile. as far as i concern, rising or lowering the vtec point on stock cams does not give any benefit, unless you are changing to cams with different spec.

B16A with stock cams max power is around 7600-7800rpm. you still can rev safely up to 8000-8500rpm before shifting gears to reduce rpm drop below the powerband that you want. rpm cut is always there for stock ecu to make sure the engine is not over-revved

 

[D_clothes]

so are u saying changing cam would be the better solution ? changing cam also does it mean i have to change the springs as well?

 

[rimbawarna]

Arlo everyone can somebody tell me is there a diffrence in
B16A auto and manual in the sense of HP and when the vtec kick in ...
and other stuff which i might don't know about ?

evelything quite same, auto best for handling but for speeding manual is the best.