Dyno day FINALLY
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- Опубликовано: 21 май 2024
- After a few little struggles we FINALLY got this thing back together and on the dyno, only thing I changed besides fresh rods and springs was titanium intake and exhaust valves, and taller lifters to change the angle and fit a bigger pushrod as I was having valvetrain stability issues and just short shifted the car for 3 years since it was a perfectly fresh engine that just had some heavy stainless valves holing it back. never seeing it make peak power, but at 7600 or so it would experience bad valve float, and while at a deficit made a hair over 1100. I’d like to add we definitely left HP on the table here as I have to jet the carbs up to compensate for my scoop on the car. When it’s perfect on the engine dyno… it’s lean going down track where it counts. So this thing was a point rich here, but what I really wanted to see is where the thing wants to live. I chase numbers at the track, not on a dyno. Here are the results of pretty much nothing but a happier valvetrain, still leaving hero numbers for power on the table, because I know they’ll be there where I need them… on the drag strip. Hope you enjoy.
Impressive!! 😎🏁
There it is! Hemi life must be nice!
Somebody has to do it
Nice. And didn't have to rev high to get it.
Yeah it just needed about 600 more rpm honestly. It’s much happier!
Wow that’s impressive. What’s the specs of the engine? Cubic inch compression, cylinder heads, etc
It’s a raised cam Indy max water block, Indy 1RA6 325cnc legend heads, 4.50” bore/4.50” stroke (572), 14.75:1 compression, Callie’s crank, grp aluminum rods, comp 48 degree cam .285/.296 .826/.785 solid roller deal. Nothing crazy exotic here. If this thing had a 5” stroke I likely wouldn’t need as much rpm for the same power, 572” is just kind of on the small side for the size of these runners so I need the rpm so I can get the good out of what I got. This is why I just changed the lifters and fit the biggest pushrod I could in it and did titanium intake and exhaust valves. The pushrods are kind of a pain in the butt because you really don’t have enough real estate to fit anything massive and they are close on these engines anyway. It turned out pretty good I think. Thanks for watching and for the interest.
Best pass before this refresh/rebuild was 5.09@133 in the dart on 275 radials. Upgrades are looking promising to go a little faster now. I had power out of it Saturday and traction issues and in the heat it was trapping over 136 now. More to come this weekend I hope. Taking it back out.
@@michaelyielding hell of a lot of power! I agree if you had the extra stroke with the 1RA6 head would drop the rpm. But hemis love RPM lol. When my dads 540 was built, my builder and I clearanced the Indy block to fit 7/16” pushrod. But we are using stage V heads which gave us the room to do so. Were you able to fit the 7/16 pushrod with these heads?
@@michaelyielding dude that things an animal! 5.09 wow. Weight? Gear? Trans?
@@rjpolitowski6057 2700ish lbs, 1.80 first gear glide, 4.10 gear with the 28x10.5 radial. 1.08 60ft. Thanks, I’m trying!