TNT;
I didn't go as deep into the why and how of things as DASA did, but he is right.
At some point with the Teryx you will exceed the volume of air/fuel mixture able to pass through the intake runners and past the intake valve during the period when the piston is moving down and the intake valve is open.
This is drectly related to the camshaft profile, which, on this machine, I know zero about. DASA knows what they are talking about here.
DASA;
Thanks for the clarification, I ASSume everyone knows what the heck I am talking about.:nuts:
I know squat about the internal idiosyncracies of the Teryx engine. All of my 35 ish years in the the go-fast game have been spent delving into the mysteries of the V-8 engine.
If you look at my avatar, that is a iron block aluminum head single 4-bbl sbc Chevrolet, of the original style, that made 637 HP on the dyno at 7440 on race gas. Crower crank, 6 inch rods, Dart 220 Spread Port Heads, roller cam, Jesel drive, you get the idea...sounded like paradise uncorked at 8k climbing Sand Mountain.
I still have the dyno printouts.
It was a sort of a cheater sprint car engine for the 360 class on gas with a Braswell Carb.
It was in a 1540 lb. hillshooter I built, from a pile of tubing.
Had to give it up due to a very bad spine.
I miss it. Alot. I wish I'd been able to hold on to the little 368, but I couldn't.
Would have made a heck of a engine for a highboy roadster.
As far as applying the FI work to the carb engines like mine, if I had my druthers, someone would work out a pair of injectors and poor-man's Motec or some other style controller. Something that would cost less than a arm and a leg to convert to. (If that doesn't happen, well, I have jetted, powervalved, tuned and futzed with Holleys for what seems like forever. I guess I can fiddle with these things. I put it on the hoist or up on ramps so I don't hafta bend over too far to work on it.)
It would be neat if to see if some of the guys running super high RPM engines could get some HP from a wee bit longer intake runner, getting some ram effect to help pack the combustion chamber...I dunno.
I am just an old hot rodder, modern bike engines are another world.
The Bultaco I had in junior high don't seem as cool now as it did back then...