Hughes stroker cam recommendation
maybe; I'll see what I can do.......
When it comes to fuel economy;with street power;
Long-period,wide-LSA, lumpy idle, hydraulic roller cams are a poor choice.
Fast-ramp,SFT cams are the cams of choice.
If your block is already set up for rollers,
solid rollers can be/ probably are, the best way to go. and
A modest HFT cam can be a reasonable compromise, if the block is not set up for a roller.
The longer your stroke is, the more you can get away with, but, the more cubes you have, the less cam you need in the first place.
end paragraph 1.
The camsize, namely a 223/230/
[email protected],that you showed in post 13, I like, and here's why; for an install at 106*;
as an hydraulic roller it might be a 276/282, Ica of 64*
as an HFT it might be a .............. 268/274, Ica of 60*
as a SFT it might be a ................ 262/268, Ica of 57*
as a solid roller, it might be ........ 254/260, Ica of 53*
As a
[email protected], these are all gonna make similar absolute power; with the rollers possible making a lil more midrange. And as we all know, a 223* cam is very streetable.
But from the generated advertised numbers, the Ica is gonna be all over the map,so to get the best low-rpm and Part-Throttle performance out of a 223*cam,every engine build has to be biased towards the cam-type being used. For instance,to make each engine generate about 185psi, to all make similar Part Throttle/low-rpm power, the Scr will have to be adjusted from
10.9 for the Ica of 64*, to
10.1 with the Ica of 53*
At WOT, the .050 is still a 223* so they will all make similar WOT-power.
As for fuel economy, the 254/260/ is likely to be head and shoulders above the 276/282. And, in fact, a guy could go up about 3 cam sizes with a solid roller, to contest the poor fuel economy of the hydraulic roller , lessee, hyup I get 275/281 advertised, but now
[email protected], and that is a game-changer right there.
end paragraph 2. Sorry;
Ok waitaminit; I just gotta add that the 254/260 solid-roller type cam is gonna accept a lower cruise rpm, than the other longer period cams, and so if you take advantage of that with gearing, you will increase your fuel economy yet again, over and above what the numbers might point to.