cams, sohc vtec vs non vtec

[redefine]

i tried, but all i got were swap guides and the 'this is a better engine' thing, not what is actually different about the engine.

i know what they were designed FOR, i'm looking for how they were designed for that

[nd55]

> the B was designed as a performance engine

The single/dual cam difference is less important than the geometry of the
engines.

D16's came in DOHC versions, but aren't the same fire breathing animal as the B16's.

Conversly, 8000rpm is within the capability of a SOHC design, but the offset spark plug necessary isn't the best design, nor is the marketing.

The B16 is actually a detuned motorcycle engine.

The D16 had better output numbers at cruising rpms. The B16 is much superior at high revs and is where it shines.

IMHO, the biggest differences are.

D16 75mm bore x 90mm stroke. 31mm intake valves.

B16 90mm bore x 75mm stroke. 33mm intake valves.

[redefine]

thanks nd55, thats what i was wanting to know

[trism]

dude you could have found all that information by using google

ozhonda isnt the only honda website in teh world

[twing]

The D16Y5 is a i-vtec. This means there's only one cam profile.
ie: exhaust - intake - nothing - exhaust

the valve with the missing intake cam lobe does nothing up until about 3000rpm, when it locks to the other intake cam lobe and they move together.

i-vtec is vtec + vtc (valve timing control).
All D series don't have VTC. D16Y5 is vtec-e (economic) = 12 Valve Low RPM, 16 Valve High RPM.

[SeverAMV]

Conversly, 8000rpm is within the capability of a SOHC design, but the offset spark plug necessary isn't the best design, nor is the marketing.

with arp rod bolts on stock rods and lumpy cams, people have hit and made power at 9300rpm on a d15b4 before.

and NA power isnt too bad when tuning a D either. actually costs cheaper to get the same power from a D than it does for a B if you know where to look.

[nd55]

> i-vtec is vtec + vtc (valve timing control).


touche.


> made power at 9300rpm on a d15b4 before

Bisi aside, a parking lot of d15's still don't qualify as power.



Nick.

[redefine]

dude you could have found all that information by using google

ozhonda isnt the only honda website in teh world

i realise that, but i didnt want to sift through 100 pages of fanboy drooling and flamewars to get to what i wanted to know (and i did sift through quite a few when i searched) so i came here and just asked. i figured there wouldnt be a problem with that, as i couldnt see any other threads on it (i searched again).

[trism]