I let mine idle twice for 10mins, with a full cool down period inbetween.. Then I ran 5 tanks through it in front of the house bliping the throttle from idle to 1/2 throttle.. Then I took it to the field down the road and ran another 5 tanks through it bliping the throttle from idle to 3/4 throttle.. Then I ran 2 more tanks through it bliping the throttle from idle to full throttle.. After that I ran another 3 tanks through it with short 1-3 second bursts at full throttle.. Then I took it to the track and just ran it like I was racing it until it was fully broken in.. Now it idles like a champ and screams like a woman on PMS! All in all its a healthy little monster

BTW, I did run it slightly rich until the 15th tank, then I started to lean it out just a little bit..

15 tanks. Wow that's 1/2 gallon of fuel. Everyone has a method as long as it works then it's perfect.

Speaking of fuel, I used S&W break in blend for 3/4 of a gallon, then switched to the Trophy Blend... The engine wasn't fully broken in until right at about the 1 gallon mark..

IMO an engine needs at least a gallon to fully seat in and stabilize.....I prefer to go thru this stage in a non race environment..... track running is fine, but I don't like racing them before a gallon.....

Yea I still haven't raced it..For tanks 16-25 I would take it to the track on off days when I would have the track all to myself.. That allowed me to closely monitor the engine temps every lap, and adjust the tuning as nessessary..

haven't don ethis in a while... but i agree with this... .. its what i do with all my engines and will continue to do so..

Broke-in my clocked Ascendancy G5 and Clocked 28 xz,I will be going out to RIPP them tomorrow,these clocked engines have been tuning in better than my stockers did.gOOD Job Neal

JUST ARRIVED TODAY, PRO CLOCKED B6 AND PIPE. I COULDN'T WAIT TO INSTALL IT IN THE BUGGY, AND I PUT A CLUTCH ON IT. READY TOMMORROW FOR A BREAK IN. SUNDAY TRACK!!

Dam thats crazy make sure you have a lot of tire glue and extra dog bones

Played with my toys today,the 28 os is a torque beast i need a better clutch to hold it at low end.The ascendancy runs just fine a good match to b5 but not really any better THAN THE B5 but the head is shiney.

But not really better then what?

But not really better then what?

Nevermind, thought you were talking about clutches for some reason

The Ascendancy G5 has a little less bottomend and about the sams topend as the B5. DOLLARWISE ADVANTAGE TO B5.

Well got my Clocked XZB this week and put it into my D8T, put 8 tanks on it and I was having the front pull on me in the straight and coming out of the corners. I did not do any fuel tank times as I will be doing that on Monday. Wicked power and cranks long on the straights with no signs of topping out. I am VERY impressed with the work that the Neal did to this motor and this wont be the last motor I will be getting from him.

Way to go Clockwork Racing for making my favorite motor even better! Do you think we should call Neal Dr. Feelgood for the grin he puts on our faces??


Thanks again guys!

Jason M.

So are you saying the break in method you used on my B5 in Edmonton last year was not correct? (one and a half tanks bliping the throttle in the feild and then race tuning on the track).