Dyno Day! Question for engine builders - A/F correction factor for dry dyno headers?
05-29-2014 | 06:47 PM
#12
Fast Singles Club
Joined: Oct 2011
Posts: 4,042
Likes: 490
From: Raystown Lake , Pa.
We made several runs making various adjustments to timing and carb jetting. Last run of the day produced peak HP of 584 @ 5500 RPM and peak torque of 605 ft/lbs at 4750 RPM. Engine had a broad, flat torque curve with 604 ft/lbs available at 3250 RPM, and 580+ ft/lbs all the way from the start of measurements at 3000 up to where we stopped at 5750. This was with dyno headers through the stock flame arrestor, with alternator and water pump being driven. All in all, I am pleased. I'll post the sheets and details later on. Need to get this thing unloaded and in the garage before rain gets here.
05-29-2014 | 06:55 PM
#14
Registered
Joined: Nov 2004
Posts: 14,097
Likes: 3,686
From: On A Dirt Floor
We made several runs making various adjustments to timing and carb jetting. Last run of the day produced peak HP of 584 @ 5500 RPM and peak torque of 605 ft/lbs at 4750 RPM. Engine had a broad, flat torque curve with 604 ft/lbs available at 3250 RPM, and 580+ ft/lbs all the way from the start of measurements at 3000 up to where we stopped at 5750. This was with dyno headers through the stock flame arrestor, with alternator and water pump being driven. All in all, I am pleased. I'll post the sheets and details later on. Need to get this thing unloaded and in the garage before rain gets here.
Too bad.
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Jking of course. LOL.
Sit back and relax. Enjoy...for now...you've done good at this point.
Enjoy boating.........in a few years when you actually put it in.....LOL.
Will enjoy reading about that, I'm sure, also.
05-29-2014 | 06:56 PM
#15
Registered
Joined: Oct 2007
Posts: 8,439
Likes: 93
From: yorkville,il
We made several runs making various adjustments to timing and carb jetting. Last run of the day produced peak HP of 584 @ 5500 RPM and peak torque of 605 ft/lbs at 4750 RPM. Engine had a broad, flat torque curve with 604 ft/lbs available at 3250 RPM, and 580+ ft/lbs all the way from the start of measurements at 3000 up to where we stopped at 5750. This was with dyno headers through the stock flame arrestor, with alternator and water pump being driven. All in all, I am pleased. I'll post the sheets and details later on. Need to get this thing unloaded and in the garage before rain gets here.
