cam shafts... stock or aftermarket??? TODA?

[DreadAngel]

dreadangel - what experience have you had with cams? have u every used any aftermarket cams? worth the trouble?

Hey philip,

I've played with cams [Not F20C specific though strangely enough but quite a few other JDM engines =P] so I know the general philosophy behind them. I've used JUN Auto, TODA and Tomei along with a custom grind set in my previous car [Redline 10,000RPM and Cut-Off 11,000RPM, higher than your F20C LOL].

F20C is very hard to squeeze power out of [This is in reference to seeing demo cars from Amuse, J's, Spoon, Toda] in NA form. Remember that dyno sheets from manufacturers, overseas or local S2000s will all be very different so think of them in context and indications. In general USA dyno's are usually happier than Australian ones lol.

Have you checked out comments made about the Stage 2 cams from BC? Personally they look ok on the dyno, minor gain but that's what happens when we play with a highly developed small NA engine [<2.5L].

Key points for camshaft selection:

• Loss of Low-Mid Range - This only happens when you go too aggressive | Increase displacement to offset, Tune can also help to a degree
• Increase idle/unstable idle - As above but also can be caused by overlapping cams | Increase displacement to smooth the idle out some, Tune can also help to a degree
• Increase Redline - In order to take advantage of the bigger duration and lift offered by cams, depending how aggressive you go, you may have to raise the redline by 500rpm - 3000rpm+ to reap maximum benefits. Disadvantage of this is expenses and possibily durability [upgrading/machine work head + bottom end to withstand the exponential stress by increased rotational speed & force which is multiplied by the ^nth]. Now this can be eliminated by reducing the redline but what's the point of going so big if you were to do that, may as well go for smaller cams lol

The rest is up to you to decide whether or not its worth the $$$ to invest in. If possible ride shotgun or test drive a mates car with your setup, failing that check out forums, YT, etc for feedback by owners that have done the mods. Some of the more articulate ones will provide more accurate reviews and numbers than others.