MILD THUNDER

iTrader: (3)

800 Holley DP

SB

iTrader: (1)

Something was out to lunch. You have a wideband a/f report on that run ?

MILD THUNDER

iTrader: (3)

We talked about that on his thread. I didnt build the engine dyno it or anything. He lives in Nevada, I live in Chicago. It was just an example of a 454,build another oso member built

SB

iTrader: (1)

Otay but it has brutal BSFC's.

MILD THUNDER

iTrader: (3)

Yes. I question the accuracy of that bsfc reading. I believe for bsfc numbers to be accurate several things need to be setup properly on the dyno/software.

SB

iTrader: (1)

Fuel Flow and Horsepower. That is all that is involved.

ramos45

iTrader: (1)

Yep, BSFC's were horrible with my carbs as they were. They were "normal" with the shop's carb and still had same power numbers, go figure..Carbs were set up out of wack I believe

MILD THUNDER

iTrader: (3)

There is a little more to it than that, but OK.

endeavour32

iTrader: (4)

Looking at that dyno chart- I would see zero reason to prop that engine anything past 5100…. 5200-5300 the engine is losing power, at 5400 it's up 3 hp , then its down at 5500, and at 5600 it's up 6 hp over 5100 rpms. In my book, that engine is done at 5100 rpms..

Knot 4 Me

I would use real world testing to determine where the engine is done at. In most cases, RPM = speed so if prop testing shows more speed at say 5,400 RPM than 5,100 RPM then in fact the motor is not "done" at 5,100 RPM.