My 550 cube 440-1 headed, alky injected motor is going to get broken in this afternoon and then tuning is planned for tomorrow Am.
Line2line piston coatings take a number of heat cycles to wear in to the proper fit. So we will burn up some fuel ! Results later!

nice!!

I hope it all goes well!!

What did it make last time it was on the dyno?

Do you have a leanout valve on the injection?

Good luck Greg!

I look forward to the dyno results.

Let's see what the 550 cubes do compared to the previous version.
It gets tough to make HP above 900, IMO;
So I am guessing 899 this time.
My notes on your combo:

Good luck. Hope it goes great. Is there a support group for guys addicted to dynoing? Haha. I’m now one of the victims.

Thanks guys! Things went great and i got the coated pistons broke in properly so we had time to make some pulls!
OK, what do you all think it made? I will post the best pull in two hours. 8pm central time.
It made 847 hp last time (2003!) But less cam, less compression, 2 inch dyno headers.
This time 2 1/4 headers and increase from 2.25 intakes to 2.300. Cam went from 278/290/110 to 284/296/114 and .100 more lift. Better oil pan. Over 1 point compeession increase to 15.1..

I hope i’m low, but i’m going to guess 890 hp. I hope you break the 900 mark. You have alot of positive changes, so maybe you will. Best of luck.

Well, here it is. I am happy!

Very nice! Congrats!

Id be pretty darn happy with that improvement, guess that could depend on dollars spent overall, but a substancial improvement.

That’s totally awesome and impressive!! Very well done. Happy for you!

Thanks Chargerfan. I was hoping for over 880 hp. To see another 46 hp , well, not many builds work out this well. I must have hit a real sweet spot where all the stars aligned!

Thanks Markz and Wyoming!

I know nothing of engines at this level, but are those normal bsfc figures for this sort of monster? they look really high?
Might be some more tune left in it?

[quote=Alchemi]I know nothing of engines at this level, but are those normal bsfc figures for this sort of monster? they look really high?
Might be some more tune left in it? [/quot
We made several pulls, adding fuel (methanol) each pull. It just kept making more power the more fuel we threw at it. The bsfc numbers said it was fat, but the power just kept going up. We finally hit a point where peak torque stayed the same.
This shows the value of dynoing a motor. I was certain i knew roughly where the tune should be. I had run a calculation on a web site that said a .117 main bypass would be close. I started at .108 and ended at .092! That means i pushed about 16 percent more fuel at it than my already supposedly rich point of .108.
Also we found and fixed oil leaks that could have cost me a weekend.
Without seeing the results of the unexpected high horse power at 7200, i could have chased the tuneup at the track and never figured it out because of false assumptions i had about what the motor wanted and how high it would make power.

Awesome. Going to the track soon?

Hi Clint. I want to run the MSRA event on Aug 21-23 if possibe.

Greg...Congrats! Mopar Max is at Cedar Falls that weekend..5 grand a day for the winner on Saturday and Sunday!

Very impressive! Congrats and thanks for sharing. It's funny? when a build using orig. B1 heads with similar flow is expected to make another 50HP.