KC Pond 482-580hp. Does that sound right?

[Rosco]

Originally Posted by Barry_R

I've only seen really high RPM out of hydraulic rollers in cars that were required to run them by the class rules. They "cheat" them into acting solid by nearly bottoming out the innards with the adjusters. They always seem to poop out on me around 6200 when run normally. But thats where they belong anyhow...

That dyno sheet looks like it had a safe and honest pull on it. I am pretty confident that you could wring more bragging numbers out of it with a leaner mixture - 12.0 coupled with BSFC around .5 shows it pretty safely rich. A bigger carb would also help with the glory part of the pull. I recently tried a 445 incher that made 455 on a 750 and 485 with an 850 - no other changes. Now - put that big carb and lean mixture on your motor and you'll have higher peaks but weaker throttle response, and a higher risk as far as fuel toreance.

Sounds like a nice engine to me....

Can you explain the A/F Ratio and what is optimal in a dyno "pull". I've seen several dyno sheets with different A/F Ratios and am confused...

Does an A/F Ratio of >13 or 14 mean to lean and not a realistic ratio or conversely, <10 A/F mean too rich and perhaps leaving power on the table?

Thanks to all,

R

[DAVID GAGNARD]

Keith;

If you would quit running around Arkansas and Louisiana with that dirt modified and stay home more, you'd have more time to work in the shop on weekends and build an Engine Masters engine!!!!!
BTW: when ya heading back to Thunder Valley?????

Besides being a "pretty good" engine builder,Keith is a racer, was probably a racer first, engine builder second.....is/has raced in some of the top dirt series/cars around these parts..........

BTW 2: I could use an engine sponsor for my road racer, about 550 hp/tq should do in a 331/347.......

I don't think I would ever go into the engine building business, no matter what someone paid me.....

seems you just can't build enough of those 700+hp/tq, 8,000 rpm,pump gas,idle @ 800 rpms,city driving motors that will last for 100,000 miles and run in the mid 9's on the quarter mile strip, for a measely few thousand dollars and warranty them for 5 years anymore!!!!!!!!!!!! seems that's what everyone wants now-a-days............

David

[RICK LAKE]

Diegokid If your run FI and lean the crap out of it. This will get you into the 20's. Remove the windshield and go with a helmet should be go for another 4-5 mpg. Coast down alot of hills for the differents. Get out and push up hill. Put the smallest cam you can find in your motor, lower the compression. That's about it. GOOD LUCK. Rick L.

[hi-tech cobra]

My initial question, "Does that sound right?" sounds like I'm not happy with the dyno numbers.

I am very happy it 'only' has 580hp. I just wanted to know what others have experienced with this setup to see if I was in the ballpark.

BTW, the dyno sheet is in my pic gallery.

[nmayes]

Originally Posted by hi-tech cobra

My initial question, "Does that sound right?" sounds like I'm not happy with the dyno numbers.

I am very happy it 'only' has 580hp. I just wanted to know what others have experienced with this setup to see if I was in the ballpark.

BTW, the dyno sheet is in my pic gallery.

hi-tech

It looks like your motor is close to what we had built. I had Keith build a 482 Pond Aluminum engine with Dual Carbs. It dynoed out at 606hp at or close to 6000rpm, with 589ft-tq at 4300rpm. More engine than I am experienced to run. I think I would have been happy with less. I told them what I wanted, and they went over and beyond what I asked. I will definitely have KC build my next engine, as I am sure you will too!

Neil