nahledge 7

has anyone with an h22 ever have any r/s (rod/stroke ratio) problems with their engine. i have heard that h22's probably have the worse ratio than any other honda engine beside a ls/vtec. How durable are these engines in the long run and can there be anything done to bring the ratio to a better number (closer to that of b16a)? im interested in the swap, but not if its is not going to be reliable on the street or the track after a year or so.

nahledge 7

ttt

Newman

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nahledge 7 &raquo;</TD></TR><TR><TD CLASS="quote">im interested in the swap, but not if its is not going to be reliable on the street or the track after a year or so. </TD></TR></TABLE>

I had my H22 in for about a year, before I sold my car, and used it on both the drag strip and road course throughout the entire year, pushing the motor to its limits everytime (otherwise, what's the point when racing?) and no problems with it. Still no problems to date with the new owner. If you take care of it and do basic maintenance and tune ups, then there isn't anything to really worry about (until you start adding forced induction).

msilbernagel

Specs from: http://raceseek.com/honda_specs.htm

Stroke = 3.571 in
Rod Len = 5.630 in

R/S = 5.630 / 3.571 = 1.577

Honda designed the engine to work with that R/S ratio and last for 100k+ miles under 'normal' driving conditions.

What over-revving a sub-optimal R/S does, in part, is push against the walls of the cylinder more during excursions (high RPM) -- increasing the liklihood of breaking down the lubricating film and accelerating wear on the cylinder walls.

In addition, under more extreme circumstances (RPM++), possibly push the rod through the side of the cylinder because of the higher side force a poor R/S produces.

It is a matter of degree.

If you're not formula racing, it probably won't be an issue for most people 'like us' that have limited budgets and a desire to have some fun doing it ourselves.

I read someone else's post today that talked about oil starving with his H22 at high-rpms -- so other matters will probably end the life of the H22 before R/S does.

?
Mark

nahledge 7

thanks alot for that helpful post. that was the same problem that i heard ls/vtec's have (piston being forced through side of the cylider wall, bent rods, etc.) glad to hear that it shouldnt be that big of a problem.