Ive read that the LS/Vtec setup has a worse R/S ratio than a B18C1 but why does it seem like the ls/vtec makes more power? Am i missing something?

I was thinking bout doing that Tech43 setup on my b16 but the ls/vtec would be cheaper. Wouldnt that setup have the same r/s ratio as the ls/vtec?

And what about b20/vtec. I saw this Best motoring vid when they were racing this b20vtec ek9. Revvin to like 9500 and i was like . I know they have thin side walls but that as long as your tuning is good ull be iite. True? This whole build would be tuned by "name brand" tuning shop so i think ill be good on tuning.

 

Just because they will be a "Name Brand" tuning shop, it wont make then the best. R/S stroke ratio really isnt that big of a factor when building a street engine. That b20/vtec was probably a built motor that was intended to rev that high, if you dont need to Rev high then dont.

 

I love how the R/S thing has been blown so out of proportion that people will think about that in terms of street motor reliability before they think about the fact that the Tech43 setup uses the pin pushed all the way through the oil ring for poor oil control, and uses a smaller piston pin at that, which is infinitely worse for the street than a 1.54:1 LS R/S ratio vs. the GSR's 1.58:1.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lekz &raquo;</TD></TR><TR><TD CLASS="quote">Ive read that the LS/Vtec setup has a worse R/S ratio than a B18C1 but why does it seem like the ls/vtec makes more power? Am i missing something?
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The longer stroke of the LS gives it more diplacement, so with all else being equal, more power. The importance of R/S ratio is over-hyped, and the difference between the B18C and B18B is only 1.8 millimeters of stroke.

 

Rod ratio is more important for longevity than power output.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt &raquo;</TD></TR><TR><TD CLASS="quote">Rod ratio is more important for longevity than power output.</TD></TR></TABLE>

Honda has 1.45's running for 150,000+ miles so I wouldnt say that was a definite.

 

I don't mean to jack the thread, but what is the point of the tech43 b16 package? Is it just so you have a 1.85 liter motor labeled as a b16? I mean its more expensive (than lsvtec) and is not as durable. The owner of tech43 himself on ht said that it does burn more oil than a regular 1.8. That in itself would make this motor completely unacceptable to me. I am going to pay good money to have a motor that burns more oil than normal and I am supposed to just live with it. Give me a break!!! What does everyone else think?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt &raquo;</TD></TR><TR><TD CLASS="quote">Rod ratio is more important for longevity than power output.</TD></TR></TABLE>

I would say rod to stroke ratio is more important to power band and power output then any of the above listed reasons. Logevity, sure... to a point. BUT it will directly dictate an engines powerband. Critical consideration to take into mind based on what the engines "duty" is going to be.