Originally Posted by Fabian K

Ok, Let me see if can help you sorry the bad english ;

I have race LRP .12 engines since the first one ,later sepc2 an spec3 now,

of course your head shims need to be correct by the % percentage ok

this engines likes and works perfectly with the botton en needle too rich, try to use aroud 9 turns opened dont worry its too much ok but works,

later this maybe you will never need to touch/tune again on the booton end
needle , to check if the botton end is fine , try this; run the car same way you run on the race, fastest you can around 3 laps , come to the pit, stop the car, and lift the front end of the chassis your car you will put the car almost on vertical the engine this time will want to rich a lot and want to die , here is the best point, if not you will need to rich a little bit more the low end needle, if the engine die before this the low end is too rich, this tip works because the car on vertical position makes the fuel inside of the tank goes easy to the carburator and make the engine rich alone,


Of course before you tune the botton end is better you tune the main needle , go to the track with main needle rich, your second speed maybe does not shift or shitf too late , start to lean 1/8 of turn each time until your engine show you a very good power so later this stop to lean or just go moore 1/8 maximum , later this go to tune the botton end like i told above,

The LRP engines does not work same procedure like nova based or anothers to have a good power on botton you need to work too rich on botton needle

Dont be afraid to rich a lot the botton end the more you rich better will be until the point of the engine die when stops

Try,
I hope will work for you

Originally Posted by Sp Racer

...so the saga continues


the top of the piston is very dark ( obviously hot) , yet the engine still runs cool

Damn strange...

Originally Posted by stefan

9 turns, damn!
Doesn't the needle fall out?

I have been running 6.75 turns, like LRP recommends, but I'll try your suggestion.

Originally Posted by Sp Racer

...so the saga continues

Fabian K - check your PM

I have tried richening up the bottom as you suggested, the problem is when I run it so rich, after straight when the excess rich mix clears out, the engine wants to run on, if I lower the idle speed then it loads up and wants to cut out.

Even though I ran the engine like this, after 10 min - lean bog, the top of the piston is very dark ( obviously hot) , yet the engine still runs cool

Damn strange...

Originally Posted by jelayne

OS plugs fit and work great

Guys how do you resent you reset your main needle and mid needle, do you all back them in all the way and start your turns from there ???

Originally Posted by Dynamite

about the carby q.

generally wind the needle all the way in until it stops, and count from # turns out.

so if the setting was say 5 turns on the high speed: wind high speed all the way in until it stops. then count 5 complete turns out from closed.

hope this helps