Max stable rpm
- Thread starter Dude
- Start date
I would bring that to the macdizzy forum, they are slide rule toting 2 stroke motorheads... Im just a suspension guy.
Stoichiometric for a gas burning engine is 14.7 which is the perfect balance. 13.7 on the way to peak trq is great and 15 after peak is awesome any leaner and i would burn holes in pistons after peak trq.
when i tune boosted cars i start to tune in on boost at 12.5 and below.
Sorry my use of a semi instead of a point messed this up woops.
when i tune boosted cars i start to tune in on boost at 12.5 and below.
Sorry my use of a semi instead of a point messed this up woops.
I will check that out i know you gotta pay there but if there is Scientific data to back up the talk i am in.
I am not one to just go ok it works and this is how you do it. I wanna know why
I have gotten alot of strange looks with my logging gear strapped to my quad on the trail though lol. One guy said he was gonna go out and buy a wideband lol. There better than plug chops and can tell you lots of info as well as egt gauges. I am already gonna turn some new needles to play with for the carb. Brings back memories of the SU days on Mg's and Jag's
I am not one to just go ok it works and this is how you do it. I wanna know why
I have gotten alot of strange looks with my logging gear strapped to my quad on the trail though lol. One guy said he was gonna go out and buy a wideband lol. There better than plug chops and can tell you lots of info as well as egt gauges. I am already gonna turn some new needles to play with for the carb. Brings back memories of the SU days on Mg's and Jag's
I love my egt. REmember too, that you will have some exhaust mixed with the incoming charge and from scavanging of the pipe to mess with afr numbers, and the amount of burnt gassed will vary with rpm.
Indeed the oil might play a part in a false reading but the heated o2 is far enough down stream to avoid most of it. Plug chops confirmed wbo2 gauge findings. I moved it down right before the can because i figured the scavenge effect of the chamber would play hell in the wave form. From my experience also with the bosch o2 it cant pick up oil in the stream. I have cooked plenty of turbo oil seals and the spray has never directly effected the reading. It is possible though but i dont believe there is enough in this application to effect the read.
A CT240 kit peak hp is around 8500rpm, and if you get a more aggressive port job done to it you may get a higher peak hp rpm, but you will lose some bottom end power. I have a standard port ct 240, and i dont like the bottom end power but i love the top end power, i can ride above the peak hp rpm all day, the motor ripes over 1/4 throttle.
BLASTER
BLASTER
i know it may not have anything to do with these blaster engines, but we used to race kt100 go karts. there a yamaha single cylinder 100cc air cooled two stroke. we had 3 karts, and one had a stock engine from yamaha, one blueprinted by yellow fin racing, and one blueprinted by adkins racing. the stock yamaha engine we always geared it to hit right about 14,500 rpm's as you hit the brakes in the longest straight, and the two blueprinted engines about 15,200 to 15,500 and if i remember right they hit peak power about 12,500 to 13,000. i know these engines are built for this, but to me it shows that if a good engine builder tries, they should be able to get these engines to hit peak power around 10,000 with the right port mapping. and heat shouldnt be too much of an issue
Oh and i rode on a rotary shifter kart last year. It scared the sh*t out of me. Cant remember what company made the keg somewhere in europe. SOB was the fastest thing i have ever been on even felt faster than a turbo busa. I specialize in rotaries and build several 4 rotors yearly for clients.
i know its a little off topic but i have never seen a rotary shifter. i would like to see more info about that. i rode a 125cc shifter and that thing was scary fast itsself. they are just so light and have such a high power to weight ratio. i think a well tuned machine will do something like 0-100mph and back to 0 in under 10 seconds. at mid ohio raceway the 250cc shifters do like 140mph on the long straights i believe
i've heard the name but i never met or dealt with him. my family got pretty heavy into kart racing but it got expensive real quick like any kind of powersports. i only raced two seasons and we got back out of it
wait a minute, does he live somewhere in central ohio? if i remember right, we may have bought a pipe engine off of him at one point in time
wait a minute, does he live somewhere in central ohio? if i remember right, we may have bought a pipe engine off of him at one point in time
alot of the kart guys are good guys and have tons of knowledge. i used to run an adkins motor on my kart, and its amazing how with all the guidelines they have, like in kt100 motors, you cannot touch the stock sleeve of the cylinder if your doing anything in the ports and all that stuff. anyways, with all those guidelines they still find a way to make something like a stock kt100 feel like a turd. at circleville raceway i took a full second and a half off my lap times from the stock kt100 to the adkins motor.
Sorry dude, for jacking your thread
Sorry dude, for jacking your thread
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