sh 28 p-6 question's.
06-19-2006, 08:48 PM
#1
sh 28 p-6 question's.
i'm having a problem getting the bottom end set. i'm looking for needle setting's after breakin. high and low. right now the low end is real sluggish and smoking like a pig if i lean it a little it get's real lean. so i'm thinking my high is off even though the temp's are 220-250. can anyone help out that has this engine. thanks.
06-20-2006, 04:25 AM
#2
Senior Member
RE: sh 28 p-6 question's.
you are most likely way too lean on top end and too rich on bottom end...the overly rich bottom end is hiding you lean top end... I just went thru the exact same thing...
I had a hard time properly setting my high speed because I couldn't find anywhere smooth and big enough to open the motor up, its jjust too fast... So it was hard to set the top end properly.
You are running a stock tuned pipe which also doesn't help.
and any new motor will take about 1 gallon before its broken in and tuneable, so be patient...
Also run a med plug like and OS 8
I had a hard time properly setting my high speed because I couldn't find anywhere smooth and big enough to open the motor up, its jjust too fast... So it was hard to set the top end properly.
You are running a stock tuned pipe which also doesn't help.
and any new motor will take about 1 gallon before its broken in and tuneable, so be patient...
Also run a med plug like and OS 8
06-20-2006, 06:50 PM
#4
Senior Member
RE: sh 28 p-6 question's.
ORIGINAL: fourwheels0
how many turns out on the hsn? how many on the lsn? i'm running a #8 plug.
how many turns out on the hsn? how many on the lsn? i'm running a #8 plug.
dude my settings are irrelevent.....you must tune for all your conditions.... I run a different tank, different tuned pipe, different brand of fuel...So my settings are useless to you.
06-22-2006, 03:45 AM
#5
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RE: sh 28 p-6 question's.
Start with the hsn flush. Then go from there. The lsn start at flush as well.
Now, granted it is winter here and i am at sea level. My hsn is about 1mm in from flush. My lsn is slightly out from flush. Dont go by my settings though. You must tune for where you are. I also use a SH exhaust which is more restrictive than most tuned pipes but is a lot quieter as well. My engine produces great power and runs around 180-200f. I tried tuning for temps around 250f and got no more power and poor performance. Dont just tune for temp. Tune for performance.
Now, granted it is winter here and i am at sea level. My hsn is about 1mm in from flush. My lsn is slightly out from flush. Dont go by my settings though. You must tune for where you are. I also use a SH exhaust which is more restrictive than most tuned pipes but is a lot quieter as well. My engine produces great power and runs around 180-200f. I tried tuning for temps around 250f and got no more power and poor performance. Dont just tune for temp. Tune for performance.
06-30-2006, 09:53 AM
#6
RE: sh 28 p-6 question's.
UPDATE!!! after playing with this thing for way too long and not getting the result's i was looking for i think i found the problem. a bad carb.i think the lowend needle is no good i never could get any bottom end.so i thought i'd try a different carb (sportwerks) and low and behold the engine actually run's pretty good on the low,mid and high. now i just need to do a little fine tuning and i think all will be good. keeping my fingers crossed i'll pound on it this weekend and see what happen's.
06-30-2006, 08:54 PM
#8
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RE: sh 28 p-6 question's.
bad carbs are few and far between, but i had a Picco .28 that was a beee otch to tune and low and behold it was the carb as well, it happens
