hi

when I got my hyper 7 it ran fine however from sugestion of another I used 5% instead for one litre. he also changed the settings. I have been to sites that show the factory settings but the engine still doesnt run ok, does anyone have the exact factory settings for the idle screw, master needle and barrel stop/idle screw for hyper 21. Please put measurements in how many turnes from being completely wound in point.
thanks

Engines aren't all the same.
And also ambient temps and nitro used and plug used,and..., and... have different effect on each engine.
What you HAVE to do since i suppose you know nothing about tuning nitro engines,DO a search on the internet on "how to tune nitro engines" OR "tuning nitro engines".There are some great articles on this.
Also do a search here on this forum and you will find great info on it too.
If you have time to play with your car you NEED to have time to learn more about it.

from the manual

BREAK-IN NEEDLE SETTINGS
• MASTER NEEDLE - 5 TURNS OUT
• LOW-END(BLK) NEEDLE - 3.5 TURNS OUT FROM FLUSH
• MID/LOW-END(BRASS) NEEDLE - FLUSH


NORMAL NEEDLE SETTING
• MASTER NEEDLE - 4 TURNS OUT
• LOW-END(BLK) NEEDLE -3 TURNS FROM FLUSH
• MID/LOW-END(BRASS) NEEDLE - NO TURNS

http://www.ofna.com/pdf/eng-hyper21.pdf

My ones from the manual are differnt. I got the .21 4 port.

Main Needle Valve (High Speed) = 3 full turns open from fully closed
Supply Fuel Nozzle (brass srew + brass case) = flush with brass case
Throttle Adjustment Screw (Idle) = Approx 1mm asperture
Sub Throttle Needle Valve (Low Speed) = 3.5 turns open from fully closed

hi are you running 5% nitro, thats too low, buy some 20% and try tuning from there.

sry for post a ? on your fourm but i need to no.i have a hyper 7 8 port and i want to no what should i put my needles at.i want to no like the best place to run my car at.and i am running 20%.thx

The best thing that you can do for that Hyper 21 8 port is to put an O.S. RG carb on it. All of your tuning troubles will likely be solved.

ok I didnt say, I know a bit on tuning engines. I am running 20 % in it. I tried setting it to 'loweboy' settings but still need some work.
thanks

That "some work it needs" it's what you have to learn.
Search!!!!!!!!!!!
A lot of info are out there on fine tuning engines!!!!!!!!!!

Read these:

http://www.*********.org/cars_eng-tuning.htm

http://www.storacingproducts.com/rc-...tes/tuning.htm

thx i will just mass around with it wheni get the parts i ordered tommorrow

i just started my rc it been a while and it like sprays gas out the muffler when i hit the gas.i no it sposed to do that but.its spraying alot.should i just put it where the manual saz to put the needles????

hi the low speed needle is too rich, 1/8th of a turn at a time until you get a good take off, but make sure you still have some smoke.

hi
I went racing on the weekend and had one of the profesionals tue my car, It runs great now. thanks for the info too