Originally Posted by
mjealey
All right guys, help a brother out. I bought a brand new Plus-4btts about a month ago and have slowly breaking it in. I used the heat method and broke it in just like the "break-in" bible says, then been running conservatively on the track in practice. The motor was so tight new it took me 1 hour to get it started. As soon as it would go up in the sleeve it would freeze, used comp heat to heat it up to 220 every time. Finally it turned over and got it started and idled the first tank through...... That is just a little history.
Now the motor has 1.5 gallons on it and is just not running very well at all. You can turn it over by hand, but barely, which I think is the root of my problem. The motor idles for day and everything is good to go. The needles are now set to flush both the HSN and LSN. Nice crisp low idle to it. The thing has no power to it at all!!!!!! It really bogs on the LSN and is really rich! I try to lean it out an hour or 2 and it starts pinging like it is lean!!!! Problem is driving it on the track it has no bottom to it!!!!!!! Does not have a very strong top to it either. Even with these conditions it is temping at 260. If I lean it to race trim on the bottom it will get up close to 300 pretty quick. I have ran, and ran, and ran this motor at its rich settings and 250 and it never really wants to get any better!!!!! I take my 3 other motors, drop them in with same clutch, pipe, tank and lines, and they scream at 220! I can tune anything and am sort of puzzled. I know it is not clutch, tank, fuel lines as they are all new other motors run great!!!!! I have inspected front bearing and see no signs of leakage.
Should I keep running it now they way it is and eventually it will loose more pinch and problem solved?????? I ran it for an hour straight last night and never improved, still really tight!!!! I think I can't get rid of the pinch, I know it is unbelievable but 1.5 gallons and I really cant turn it over by hand??????? This one is going to need a new rod if it ever breaks in.
Any thoughts by the Nova experts???????
Nova C5tgc (for Break-in)
Byron's 30/11%
Nova 9886
Okay, so I decided to take the motor apart and inspect. The motor was absolutely clean as a whistle and looked very good for a motor that was 1.5 gallons in. I went ahead and cleaned everything inside even though it looked new and reassembled. I went to the track and ran the engine, and ran the absolute $#@% out of it for about 3 tanks, all I had time for tonight. I was so close to it being broke in I think becuse it was running better and had a better top to it and first tank was around 255. Said the heck with it and ran it in the ground, and sure enough, it started making more and more power and temps ended up after 3 tanks at 228. So, the motor is finally starting to drop and wear in. Mine is just coming aong a little slower than some! It still is really tight but is starting to run on the track!!!! I feel like all is well!!!!!! If I just would have ran 3 tanks more the other day, i feel like I would not have had to post the first post!!! I was all so close!!!