tonyown Posted August 6, 2009 Author Report Share Posted August 6, 2009 haha I know I know I passed from .042 to .056 cuz I've retried the solder compression on left side and i had a better result ty for help! Quote Link to comment Share on other sites More sharing options...
tonyown Posted August 6, 2009 Author Report Share Posted August 6, 2009 (edited) bought 5 gallon of c14 112$ canadian $ here's a pic of the sparkplug that came out of the right dome... its dark jeting was rich a lot Edited August 6, 2009 by tonyown Quote Link to comment Share on other sites More sharing options...
SAVAGE420 Posted August 6, 2009 Report Share Posted August 6, 2009 WTF? Your kidding right? You could be fine running 93-94 with those 21cc domes and where you are. :ninja: Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 6, 2009 Report Share Posted August 6, 2009 I misread his first post. I thought this was a 4 mil stroker, in which 21 cc domes would up the compression significantly....my bad on the read. With a mid 50s squish and 21cc domes on a stock stroke motor with only 4 degrees of timing, I agree. That should run on pump gas. If the motor is sealed, clearances are within spec, and the reeds look fine...I'd start looking at an electrical issue. Quote Link to comment Share on other sites More sharing options...
tonyown Posted August 6, 2009 Author Report Share Posted August 6, 2009 uh? i have a 4mm stroker 5 mm long rod hot rod crank, 795 series 64.5mm piston, 2mm 21 cc cut dome, port matched all by F.A.S.T racing and 4degree timing advance and i dont have any trouble the shee ran really great but a spark plug came lose ont the right dome i ran 21cc with my stock stroke engine and +4 timing with 91 gas pump but im on the first rides on the 4mm stroker and a spark plug came out of a dome we dont have 93 gas here 91 max Quote Link to comment Share on other sites More sharing options...
2strokespirit Posted August 6, 2009 Report Share Posted August 6, 2009 uh? i have a 4mm stroker 5 mm long rod hot rod crank, 795 series 64.5mm piston, 2mm 21 cc cut dome, port matched all by F.A.S.T racing and 4degree timing advance and i dont have any trouble the shee ran really great but a spark plug came lose ont the right dome i ran 21cc with my stock stroke engine and +4 timing with 91 gas pump but im on the first rides on the 4mm stroker and a spark plug came out of a dome we dont have 93 gas here 91 max 21cc dome on a 4mm with 91octane is WAY to small.... The UCCR will be way to high for that fuel.... You will have to go up to like 25cc... You can't say that all motors will run save under 150psi gauge reading.... The UCCR is what does the job and this is a 4mm......... Quote Link to comment Share on other sites More sharing options...
tonyown Posted August 7, 2009 Author Report Share Posted August 7, 2009 21cc dome on a 4mm with 91octane is WAY to small.... The UCCR will be way to high for that fuel.... You will have to go up to like 25cc... You can't say that all motors will run save under 150psi gauge reading.... The UCCR is what does the job and this is a 4mm......... ok ty Quote Link to comment Share on other sites More sharing options...
dajogejr Posted August 7, 2009 Report Share Posted August 7, 2009 21cc dome on a 4mm with 91octane is WAY to small.... The UCCR will be way to high for that fuel.... You will have to go up to like 25cc... You can't say that all motors will run save under 150psi gauge reading.... The UCCR is what does the job and this is a 4mm......... Thank you brotha...preach on.... Quote Link to comment Share on other sites More sharing options...
tonyown Posted August 7, 2009 Author Report Share Posted August 7, 2009 last question am i safe with 50/50 mix with 91/110 octane or only 110 or i must change domes Quote Link to comment Share on other sites More sharing options...
tonyown Posted August 7, 2009 Author Report Share Posted August 7, 2009 I took a little ride with 50/50 91/110 and everything looks as good as when I ran only 91 cant find anything wrong Quote Link to comment Share on other sites More sharing options...
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