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Post by 2strokd on Feb 11, 2015 20:25:22 GMT -5
With your squish set closer to 1mm you might be ok with a bit lower otc?
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Post by iwiketuddlz on Feb 11, 2015 21:09:06 GMT -5
Man can't seem to get rid of this horrible sputter rich at low throttle, Mmm any ideas? Once it hits above 8k it clears right up, I dunno it's a bit anyoing, I'm guessing it's this cylinder.? Oh my squshn is. 94 ATM is that OK for 93 octane not 94 lol
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Post by iwiketuddlz on Feb 11, 2015 21:23:27 GMT -5
I'm running a 120 main and 45 pilot does that sound right? Pilot is about 1 1/2 turns out... Also cuts Out at wot bit I can hold it in a sweet spot and it will stand straight up
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Post by iwiketuddlz on Feb 11, 2015 23:01:08 GMT -5
I fix! My main was tooo big I moved down to a105....much better me likey  |
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Post by niz76 on Feb 11, 2015 23:05:53 GMT -5
Awesome Tuddlz! Man get that video! We wanna hear what the fox says!
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Post by Lucass2T on Feb 12, 2015 1:23:58 GMT -5
Man can't seem to get rid of this horrible sputter rich at low throttle, Mmm any ideas? Once it hits above 8k it clears right up, I dunno it's a bit anyoing, I'm guessing it's this cylinder.? Oh my squshn is. 94 ATM is that OK for 93 octane not 94 lol Well, my opinion is you just don't run a .94 squish on a full-race Polini BIG EVO 94CC, but more something like .6 (check the Bell book). If that means you need to use fuel with higher octane, so be it. It aint a daily driver (i guess  ). A tight squish gives you more detontation safety eventhough most of the times compression gets higher. You can mill out the head to lower compression. But try to stick to that tight squish! It makes the squishband and workings more efficient. |
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Post by iwiketuddlz on Feb 12, 2015 6:25:21 GMT -5
Thanks lucas yes it is a daily driver as well lol, OK so I will adjust the squish in a few days, but right now at what it is set at the thing is a rocket,when I tighten the squish it will have even more power! I just have to drain all my antifreeze and stuff now dangit. Oh well is what it is... Thanks guys video soon trying too figure a way mount my phone because I can't drive this thing with one hand! My main is still too big bit I will leave it rich untill I break it in..I'd say a #95 main will be the ticket...
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Post by stuckchuck on Feb 12, 2015 9:03:54 GMT -5
a little bit of a rich stumble or miss when cold and not up to temp is fine, that also tells you its not ready and warmed up yet? as it warms up it should lean out some and not be as noticable after a lap around the block, kinda like setting the air-fuel mix after its warmed up i cant speak from exp with this cylinder but 2-strokes in general that have a powerband up there like the Big Evo won't like to run smooth at a low rpm @ 1/8 - 1/4 throttle. it will like load and lots of throttle!!! get a bunch of new spark plugs and run it, then cut the threads off and do "proper plug chops" at several throttle positions. a lean spot any where could well you know... a water cooled cyl can run leaner than a air cooled just always use "high quality" oil!
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Post by 2strokd on Feb 12, 2015 9:52:39 GMT -5
You gotta update your sig! Stock ignition? If so you really need to update! These OEM boxes are flat-liners with no real curve in the map... You run that big evo into the 11,12-14,000RPM range (if it will even rev that high) and its gonna probably hurt it if you hold it for any amount of time when it never pulls enough timing out.
That being said, FUCK man i bet that thing would be fun fun with the right tune!
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Post by 190mech on Feb 12, 2015 10:16:46 GMT -5
Agreed!Get the squish down to spec and live with the part throttle richness,it'll save the engine!!
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Post by iwiketuddlz on Feb 12, 2015 10:38:32 GMT -5
Awsome thanks guys I'll fix the squish today after work and keep y'all posted, in meantime I'll make a video of the scoot idling or something so you can hear it... Muwhaha I may have the fastest damned scoot in NC..... Hehew
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Post by Lucass2T on Feb 12, 2015 13:32:32 GMT -5
Love this build
Updates every day!
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Post by Jwhood on Feb 12, 2015 13:48:13 GMT -5
Yeah that pipe is nice bro!!
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Post by iwiketuddlz on Feb 12, 2015 20:51:00 GMT -5
Thanks peps so fix squish to. 63 and me likey much better throttle response and Sher power! Still stutters pretty bad at wot I'm thinking they main is still too big I'll have some smaller ones tomorrow give that a try.
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Post by iwiketuddlz on Feb 13, 2015 6:32:16 GMT -5
Well- I just blew it up!! It just shut organic off 11k and I have no compression, bet I burned a hole in the piston. I'll be ordering a new one in a min... Had to push it to work luckily one wasn't to far Away man I'm so pissed
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