RPM Range –
Comer K80 - Absolute minimum 7,000 RPM’s – Useful RPM range 7,600 – 13,000
Carburetor Settings –
Tillotson HL166 2 5/8 – 2 ¼ ¼ - 0
When adjusting the needles, DO NOT OVER TIGHTEN THE NEEDLES when you are looking for the closed position. This will damage the needle and seat.
We recommend using the “Uni” style air filter when running the Comer engine. These are the filters used with the RLV air box. Do NOT oil the air filter between sessions; this will affect your jetting and carburetor tuning. We also recommend the RLV Air Box.
Comer K80 Engine Break In Procedure
Oil Mixture – We recommend using 8oz. of castor per gallon. We have had good results with the Burris Hi-Rev castor and the Maxima Castor 927 oils. Always check with your series for oil specifications.
Spark Plug - We recommend using the BR10HIX with a gap at 0.035”
For the break in procedure, you will want to run the engine on the stand until the engine reaches 125 -130 degrees. When on the track, you do not want the engine below 7,500 rpm’s at any time during the break in procedure. For the first 4 -5 laps, allow the engine to rev up to 11,000, then back off and allow the RPM’s to drop back down around the 8000 RPM range and repeat this procedure down the straights. You will want to utilize full throttle, and to maintain the lower RPM values, back off the throttle.
After the first 4-5 laps, repeat the above procedure, adding an additional 1000 RPM’s to the last RPM value. Continue this procedure until you are running at the desired maximum RPM range. Repeat the above procedure for a minimum of 3 sessions.
Normal engine temperatures while using a head temperature sensor should be around 400 - 460 degrees. We do not offer a baseline for EGT, although, EGT is useful for tuning. Record the EGT for each engine when you feel it is running at its best. This number should serve as a guide when tuning.