I'm not sure if anyone has heard of this, I just thought I'd ask though.
Now I seen on facebook controversy over putting a non VTEC head on a VTEC block. For example, Ls head on a Gsr block. Is it possible? Is this really stupid?
What's your guys thoughts?

 

Yes it is possible.

 

I was reading through and someone mentioned the ports for coolant or something don't alight properly? I'm not 100% sure but someone mentioned between the head and block there were port or jackets? That didn't line up correctly.

 

It does work. It may not be 100%, but then again, neither is an LS/Vtec.

 

Yes it works, yes its stupid.

 

Why?

 

Why would one do this, ls blocks can be had for a lot cheaper and with no installation trouble?

Its been done in the past, and it was pointless then.

 

Way back in the day I wanted to do this. I had a ported LS head, cams etc... and thought it would be an upgrade over a VTEC head. A quick google search straightened me right out. LS head went on Ebay.

 

So your saying it wont work, along with the fact that there are really no gains to doing it?

 

I think Dark Teg means it isn't a perfect swap and a VTEC head is more efficient any ways. If you have franken-parts lying around, you can do it. If not, stick to the tried and true.

 

If you can put a VTEC head on a block that originally had a non-VTEC one on it then why could you NOT do the reverse? And why is it even important? Yes it has been done. Usually by people that just grab the first head they can get their hands on after the old one craps out.

 

VTEC heads outflows LS head by a mile. VTEC valve train is also far superior.

 

To be honest, I think that the VTEC valve train has too many moving parts. The fewer moving parts you have in the valve train the better. K.I.S.S.

What are you referring to when you say that it is far superior, quality or function? I would say they both have equal quality. If you are referring to superior function, I would say that is a matter of opinion.

I can handle a loapy idle..... SOHC4lyfe!

 

With that logic we should stick with sundials and toss our wristwatches in the trash.

 

Nope.... If you really want to know what I think. I think we should move on to direct injection and electronic/hydraulicly operated valves... no more cams, valve springs, LMA's or rockers! I'm not completely in the dark! I'm talking in terms of what we are working with here. I'm not a 90's VTEC nutswinger! The new technology in iVTEC is great, but that's not what we are talking about in this thread.

 

Normally I would agree with you but other than the LMAs needing replacement every 2-300k miles the b series VTEC valvetrains have completely defied any early fears that their complexity would lead to problems. If anything I prefer then to non-vtec valve trains which run louder and reougher and do not keep lash settings as long.

Objectively the b series VTEC heads are far superior in flow, which is why non-vtec will never perform as well even if the user prefers/puts up with a lopey idle and poor low end performance. VTEC also gives a wider power band which can allow users to decide whether they prefer low end power around town or a stronger midrange. I would also guess the design allows for a more aggressive profile with less wear (and hence greater power-specific valve train longevity vs non-vtec).

 

The VTEC heads are solidly built. I don't see how more "moving parts" is detrimental. My take on it? H22s are waaay better than H23s. Just an example.

 

Dem JDM H23 VTEC blue tops doe.....

 

The rocker arm assembly on LS heads sucks compared to a VTEC head. Its really not even debatable.

 

made my night, thanks for the lol.