dynoing with FULL wet exhaust??
02-14-2023, 07:02 AM
#51
Registered
Sounds good.
I agree on the ‘collector’ issues. Many dyno shops i see add collector length (ie: just using same diameter as risers / collectors) instead of putting exhaust into terminator box (ie: atmospheric) …….collector length influences power in big ways sometimes. Sometimes not peak power, but many times huge changes in power lower in the curve.
I agree on the ‘collector’ issues. Many dyno shops i see add collector length (ie: just using same diameter as risers / collectors) instead of putting exhaust into terminator box (ie: atmospheric) …….collector length influences power in big ways sometimes. Sometimes not peak power, but many times huge changes in power lower in the curve.
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articfriends (02-14-2023), hogie roll (02-14-2023)
02-14-2023, 09:01 AM
#52
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Looks like a 525 copy? Not too aggressive, I’ve heard 525s in Dyno trim can do around 550-560.
I think a cam with more overlap will give up more in the switch to non long tube boat exhaust due to losing the benefit of scavenging. Especially in mid range torque, the peak numbers won’t be off as far due to short exhaust runners getting closer to a scavenging frequency at high RPM.
Got an overlay?
I think a cam with more overlap will give up more in the switch to non long tube boat exhaust due to losing the benefit of scavenging. Especially in mid range torque, the peak numbers won’t be off as far due to short exhaust runners getting closer to a scavenging frequency at high RPM.
Got an overlay?
02-14-2023, 10:14 AM
#53
Registered
So Im buying 2 industrial grade silencers with 8" inlet/outlet to mount on outside wall of new dyno room for normal dynoing. Im also burying a 1500 gallon plastic tank that water from dyno brake is going to gravity drain into.Going to add extensions to top of both vents on that tank and when I dyno wet exhaust there will be a second set of exhaust holes thru the wall, will expand tailpipes from 4" to 8" pvc with 90s turning into the risers on tank. IF there isnt a clear expansion/size change on a tailpipe from its 4" or 5" and its extended with SAME diameter pipe, youve now created athe wolrds longest collector, Smitty
Attachment 577590
Attachment 577590
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articfriends (02-14-2023)
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02-14-2023, 04:29 PM
#55
Platinum Member
Platinum MemberThread Starter
I bought some used dyno equipment (that I ended up not using) from a race shop on Texas/Oklahoma border, they used air pressurized water outside to supply water to the dyno brake vs a 7.5 or 10 hp pump.
02-18-2023, 07:20 AM
#57
Platinum Member
Platinum MemberThread Starter
drove 1250 miles round trip to Troy Godfrey race engines in PA this week and bought me a nice set of stationary mufflers for new dyno room for when I dyno race car stuff.
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02-18-2023, 09:48 AM
#59
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Worlds largest set of Cherry Bombs. 
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