Quote:
Originally Posted by DanEC
I had Keith Craft build my 428 stroker more for torque than raw horsepower. I witnessed the dyno pulls but didn't really sit down and closely study the dyno data until later. The recorder didn't start recording until 4200 rpm and based on everything, I always assumed that was well above the torque peak - which I figured was down somewhere in the 3600 rpm area.
I finally got curious enough to email Tony at Keith Craft and ask if they had any additional data in their file that recorded the max torque and peak rpm. He advised that the recorder starts recording when the motor hits the torque peak - indicating peak torque was at the 4100/4200 area.
I'm having a problem believing this motor's torque peak is at 4200 rpm especially with max power at 5300 rpm. What would you think?
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Quote:
Originally Posted by ERA Chas
I question several other things.
The heading 'A/F Ratio' is listing fuel pressure which is fine but the actual A/F Ratio would be valuable.
I think the BSFC is a bit high for these days but then I see the motor struggles to make more than 50% V/E.
Dan can you post some particulars in the motor's parts list? A 'torque' build should not have a lot of overlap or duration...  |
I'd want another dyno run without conflicting figures like that.
A/F ratio in the sixes is certainly wrong, and VE in the fiftys?