Originally Posted by
codeman
IMO a stock FX is perfectly fine, and to me it's powerful enough already that there's no real difference from a clocked Picco Boost 5TR I have, and the FX seems to pull even harder off the line. If I had to guess, I might say the Picco revs a bit higher though. From direct experience
Not to knock anything about modified engines, but a high performing stock engine where one of the internal bypass ports isn't blocked is preferable to me, especially when running on dirtier tracks.
The reason is if your tune is a bit rich (and in general) its way more prone to leaking right out of the front of the crankcase... which will do more harm than good in attracting a whole shit ton of dirt in the process. Also from experience. Don't get me wrong, the modified engines improve on stock to differing degrees so I'm not knocking it at all, but when you have an already high end engine your money is well spent on the excellent service and break in service etc.
Stock vs stock the FX is much higher timed and much more powerful then the Picco....... But the Picco tunes easier and idles better and is much smoother...
Stock I found the FX lacked on the top end....had crazy bottom end but was nothing special on top end.....
when judging modified engines you really need to judge the same engine before and after mods...the Picco Boost is one of the smoothest engines there is, and the Hudy FX is one of the most dynamic..... Put that stock FX next to a Clocked Bonito and that FX is going to look very tame...heck even putting the stock FX against my Clocked FX the stock FX is going to look very tame...
Also the last thing you want is the bypass open when running in dirty conditions as your front bearing will fill with dirt that will eventually run thru your engine and cause damage...A Blocked bypass may create a leak with a rich tune but dirt will never get into the bearing...... To date I have had a few hundred engines with blocked ports pass thru my shop and not a single one has dirt in the bearing, by contrast about 75% of non blocked engines have the bearings full of dirt....Blocking the bypass protects the bearings there is no question on that...... Having a little leaking out the front does absolutely no harm ....having the front dry worries me more then having the front wet.......