Lucas2504 Posted January 3, 2016 Share Posted January 3, 2016 Hi, I have a hyper 7 .21 8 port and I have adjusted the needles so that it idles correctly (I used the flowchart) however when I pull the trigger, even if I only pull it a little; the engine will rev lower! and die, sometimes it revs a little higher, but then again revs lower and dies. When this happens the exhaust spits a large amount of oil/smoke/fuel out. I have checked the throttle servo and it is moving in the correct direction. The fuel is brand new and all batteries have been changed. Any help would be great! Quote Link to comment Share on other sites More sharing options...
tomr Posted January 3, 2016 Share Posted January 3, 2016 Sounds like it's rich on the hsn try leaning the it out a little at a time Quote Link to comment Share on other sites More sharing options...
Lucas2504 Posted January 3, 2016 Author Share Posted January 3, 2016 but if I lean it out any more the wheels spin on idle and the engine revs really high. Even if its only by 1/8 of a turn Quote Link to comment Share on other sites More sharing options...
chrisknights Posted January 3, 2016 Share Posted January 3, 2016 lean the high speed needle and adjust the idle anti clockwise to bring the rev s down , but it sounds like you have played with the low speed neelde as well Quote Link to comment Share on other sites More sharing options...
Lucas2504 Posted January 3, 2016 Author Share Posted January 3, 2016 I have done that but maybe I didn't do it correctly, tomorrow when it gets light i'll do some adjustments. I have also searched online and found that engine compression could be the problem, do you think this is so. Quote Link to comment Share on other sites More sharing options...
chrisknights Posted January 3, 2016 Share Posted January 3, 2016 is this a brand new engine or second hand Quote Link to comment Share on other sites More sharing options...
chrisknights Posted January 3, 2016 Share Posted January 3, 2016 HYPER ENGINES - 21 A) High Speed Needle Low Speed Needle C) Idle Screw D) Midrange. Do NOT Adjust! Turn both the High Speed and Low Speed needles (screws) to flush in relation to the collar/sleeve. This means bringing the top of the screw head even with the top of the sleeve or collar in which its housed. Leave the LSN (Low Speed Needle) flush with it's sleeve. Do NOT adjust the Mid-Range Needle. Call tech support if you made adjustments to this screw. Then turn the HSN (High Speed Needle) in 1 turn from flush. Closer to 2 turns in from flush will make the engine run faster, but your temperature can get too high quickly. Stick to 1 turn unless you are more experienced. Quote Link to comment Share on other sites More sharing options...
Lucas2504 Posted January 3, 2016 Author Share Posted January 3, 2016 Second hand (may have been massive mistake) the previous owner said he used after run oil and treated it well but you can never be sure. I disassembled the car almost totally to clean it but didn't go inside the engine. Quote Link to comment Share on other sites More sharing options...
chrisknights Posted January 3, 2016 Share Posted January 3, 2016 well you can feel the pich when you pull the pull start plus another way is to take the engine out and hold it by the fly wheel and if the engine spins around then yeah its lost its pinch , so new liner and piston , but then again there are engines out there that are cheaper now that oyu can get , but then i would go back to stock needle settings and try again , if all fails , you then check for air leaks and then check the pinch ,also make sure your air filter is new or clean as that will effect the tuning Quote Link to comment Share on other sites More sharing options...
spannermonkey Posted January 3, 2016 Share Posted January 3, 2016 After reading this post I say rich settings are most likely. As has been advised, adjust to stock needles and tune from there. Remember that 1/8 of a turn can be too much. Try 1/16 at a time and be patient, after every adjustment try to punch the throttle a few times to clear fuel from the engine before adjusting again. Quote Link to comment Share on other sites More sharing options...
Lucas2504 Posted January 3, 2016 Author Share Posted January 3, 2016 Ok, I will set needle settings now and test tomorrow. Thanks for the help! By the way is it normal for the .21 8 port to not come with a pullstart? it doesn't appear to even have a plate for it, I just use bump start which is fine but I thought a starter cord was standard on basher engines. Quote Link to comment Share on other sites More sharing options...
Lucas2504 Posted January 4, 2016 Author Share Posted January 4, 2016 Ok I just tried to run the car and first I tried slowly making the engine leaner, then richer as I couldn't give it any more air, none of this worked and what I found was happening was that when I pulled the throttle, the engine revved lower and made a weird noise, wheels didn't move. Yet the exhaust spat more smoke out even though the engine sounded like it was revving lower...odd. So then I reset the lsn and hsn to factory, it didn't idle for a minute, so I tuned it until it idled at lowest possible revs, same issue as before occured, I'm probably missing something blindly obvious, any help? Quote Link to comment Share on other sites More sharing options...
Sayce97 Posted January 4, 2016 Share Posted January 4, 2016 Ok I just tried to run the car and first I tried slowly making the engine leaner, then richer as I couldn't give it any more air, none of this worked and what I found was happening was that when I pulled the throttle, the engine revved lower and made a weird noise, wheels didn't move. Yet the exhaust spat more smoke out even though the engine sounded like it was revving lower...odd. So then I reset the lsn and hsn to factory, it didn't idle for a minute, so I tuned it until it idled at lowest possible revs, same issue as before occured, I'm probably missing something blindly obvious, any help? I wouldnt worry about how long it idles too much, nitro engines dont like to idle. If i left my engine to idle for 1 minute and tryed to pull away id expect it to struggle or stall. Try tuning for performance rather than how long it can idle. It may well just be the engine if it is pre owned though. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Anthoop Posted January 4, 2016 Share Posted January 4, 2016 21 hours ago, Lucas2504 said: Ok, I will set needle settings now and test tomorrow. Thanks for the help! By the way is it normal for the .21 8 port to not come with a pullstart? it doesn't appear to even have a plate for it, I just use bump start which is fine but I thought a starter cord was standard on basher engines. Virtually all of the Hyper.21 engines are the same....you can add a pullstart if you wish. I always recommend these settings for Hyper.21 engines...1mm slide gap LSN 0.5 mm out from flush and HSN at least 3.5 out.....very rich...so get it started and adjust from there....HSN-LSN-GAP(after gap adjust will need more LSN adjust...they work together)..only tune a warm engine. What fuel and plug are you using? Quote Link to comment Share on other sites More sharing options...
spannermonkey Posted January 4, 2016 Share Posted January 4, 2016 Factory needles wont let your engine idle once run in. The idea of returning to those setting is to give you a solid base to tune from. Stock needles then tune hsn, then lsn and finaly idle if needed. Quote Link to comment Share on other sites More sharing options...
Lucas2504 Posted January 4, 2016 Author Share Posted January 4, 2016 2 hours ago, Anthoop said: Virtually all of the Hyper.21 engines are the same....you can add a pullstart if you wish. I always recommend these settings for Hyper.21 engines...1mm slide gap LSN 0.5 mm out from flush and HSN at least 3.5 out.....very rich...so get it started and adjust from there....HSN-LSN-GAP(after gap adjust will need more LSN adjust...they work together)..only tune a warm engine. What fuel and plug are you using? I'm using Byrons 20% and os 8 plug Quote Link to comment Share on other sites More sharing options...
Lucas2504 Posted January 4, 2016 Author Share Posted January 4, 2016 23 minutes ago, spannermonkey said: Factory needles wont let your engine idle once run in. The idea of returning to those setting is to give you a solid base to tune from. Stock needles then tune hsn, then lsn and finaly idle if needed. Ok, I'll try it that way next time, was doing it wrong I guess, thanks. Quote Link to comment Share on other sites More sharing options...
chrisknights Posted January 4, 2016 Share Posted January 4, 2016 get the engine warm on stock settings , run up and down and tune the hsn only till you got as much power as possible and then back off 1/8 of a turn so there is smoke still coming out of the exhaust then tune the lsn so you car shoots off like a rocket but has smoke still coming out of the exhaust then adjust the idle or watch this video https://youtu.be/ma2_CghxiUk Quote Link to comment Share on other sites More sharing options...
Anthoop Posted January 4, 2016 Share Posted January 4, 2016 1 hour ago, Lucas2504 said: I'm using Byrons 20% and os 8 plug 20% is the lowest nitro content you should run....it can and will run with lower but it will make running/starting much harder...25% will make tuning and running much easier for you....the OS8 plug is fine but a longer plug is what your engine was made to use.. Quote Link to comment Share on other sites More sharing options...
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