Scalded-dog
RCTalk Member
Still trying to fine tune my tuning skills.
I have a savage x 4.6 that runs well for the most part. But i think i have something that needs tweeked. I double checked all the mechanical possibilities i could think of and they are solid.
It seems to run well.. blue smoke wheelies no bogging out etc... but!!... When i let it sit and idle for say 20 seconds the carb loads up and if i dont baby the throttle forward it instantly dies. Does this sound like it is running too rich?
I started by setting carb to hpi factory standards.
I have idle set to .8mm via feeler guage (paperclip measured with calipers). Then i set the Hsn and lsn flush. Warmed up engine... leaned out the hsn till it had a lean cut out at full throttle and richened it up about 3 hours. I then monkeyed with the lsn until i got a nice slowish camed out sounding idle... and a pinch test speeds engine up in about 1.5 seconds then kills it in about 1.5 secs later. (Total pinch time approx 3 seconds). When comming in from a full throttle run the idle drops down almost instantly (no hi idle then slow idle at all) The engine is running about 245 to 260 F... (temp was checked with 2 dif temp guns with similar results). And the temp is a lil tiny bit higher than i would like for a fomfort zone.
When at idle on a stand it slobbers a goodly amount of oil on bench.. and if i remove air filter it a little bit of fuel out the top. Glow plug comes out pretty wet when i pull it to put after run oil in.
I am shy to lean it out any further as to not increase the temp more.
Lsn is almost at factory flush setting and even an 1/8 turn more rich wont let it idle at all without trimming the throttle open more. Hsn is about 1 3/4 turned in lean from flush. Idle screw is still set to .8mm and has been untouched.
I followed about every part of tuning guide i could think of. Factory carb.. hsn then lsn. To me it acts like the lsn is slightly on the rich side.. and the hsn is about as lean as i dare go.
Sorry for the rambling .. i just wanted to explain my thought process and the tuning method i am trying to follow.
Am i overlooking something? Maybe just turn idle up a bit? Is the 20 sec idle and load up and slightly hi temps ok? I normally dont let it sit and idle that long unless i get distracted or the truck is upside down waiting to be flipped over. But it sure is a pain when i forget to baby the throttle and it dies mid bash session.
Thanks guys
I have a savage x 4.6 that runs well for the most part. But i think i have something that needs tweeked. I double checked all the mechanical possibilities i could think of and they are solid.
It seems to run well.. blue smoke wheelies no bogging out etc... but!!... When i let it sit and idle for say 20 seconds the carb loads up and if i dont baby the throttle forward it instantly dies. Does this sound like it is running too rich?
I started by setting carb to hpi factory standards.
I have idle set to .8mm via feeler guage (paperclip measured with calipers). Then i set the Hsn and lsn flush. Warmed up engine... leaned out the hsn till it had a lean cut out at full throttle and richened it up about 3 hours. I then monkeyed with the lsn until i got a nice slowish camed out sounding idle... and a pinch test speeds engine up in about 1.5 seconds then kills it in about 1.5 secs later. (Total pinch time approx 3 seconds). When comming in from a full throttle run the idle drops down almost instantly (no hi idle then slow idle at all) The engine is running about 245 to 260 F... (temp was checked with 2 dif temp guns with similar results). And the temp is a lil tiny bit higher than i would like for a fomfort zone.
When at idle on a stand it slobbers a goodly amount of oil on bench.. and if i remove air filter it a little bit of fuel out the top. Glow plug comes out pretty wet when i pull it to put after run oil in.
I am shy to lean it out any further as to not increase the temp more.
Lsn is almost at factory flush setting and even an 1/8 turn more rich wont let it idle at all without trimming the throttle open more. Hsn is about 1 3/4 turned in lean from flush. Idle screw is still set to .8mm and has been untouched.
I followed about every part of tuning guide i could think of. Factory carb.. hsn then lsn. To me it acts like the lsn is slightly on the rich side.. and the hsn is about as lean as i dare go.
Sorry for the rambling .. i just wanted to explain my thought process and the tuning method i am trying to follow.
Am i overlooking something? Maybe just turn idle up a bit? Is the 20 sec idle and load up and slightly hi temps ok? I normally dont let it sit and idle that long unless i get distracted or the truck is upside down waiting to be flipped over. But it sure is a pain when i forget to baby the throttle and it dies mid bash session.
Thanks guys