Converter change required mucho less fuel

[Ed Valvo]

Changed from Yank 10.5 lockup to PTC 9.5 non-lockup and I was leaning out the fuel on every pass to get back to where I normally run. Anyone experience this? Not a bad thing because now I'm not so borderline on fueling. I'm assuming the PTC is way more efficient.

 

[John Wilde]

Changed from Yank 10.5 lockup to PTC 9.5 non-lockup and I was leaning out the fuel on every pass to get back to where I normally run. Anyone experience this? Not a bad thing because now I'm not so borderline on fueling. I'm assuming the PTC is way more efficient.

Sounds like less slippage I bet your transmission is running cooler too even with out the lock up. Anyway I spoke to Dean and Manny but I am still waiting for your report.

 

[bison]

Without data logs and time slips you cant make a good comparison. The bsfc of the engine will not change if the converter is changed. The converter may make the engine spend more time in different rpm range but id bet the bsfc a any given rpm is the same if the power at the crank is the same. Slip occurs after the engine and is wasted power.

 

[John Wilde]

Without data logs and time slips you cant make a good comparison. The bsfc of the engine will not change if the converter is changed. The converter may make the engine spend more time in different rpm range but id bet the bsfc a any given rpm is the same if the power at the crank is the same. Slip occurs after the engine and is wasted power.

Thanks for the sanity check Brian!

 

[John Wilde]

I bet your chips programming was lost when the converter was installed.
Most shops will disconnect the battery...

 

[Ed Valvo]

Nevermind. Was running less boost. Duh. Idiot behind the wheel...