cranking compression

Jeff Lee · 09-09-2010, 12:20 PM

IF dyno numbers / comparison is accurate AND it picked up HP/TQ with no dips that were not present before, AND the peaks are at the same RPM, then it should be a quicker car.
If it is not, it must be something external of the engine. Does anybody disagree?
And a -3 MPH should be more than .100 increase on ET. Right?

What is different about the ring package and how did that show a benefit to you on the dyno? Less leak-down? More / less vacuum in the engine? How much difference to the old engine?
Is the extra ring seal creating more HP at the same time creating more demand from the carb(s) & the fuel curve or float / needles & seats, now under par in the car as opposed to the dyno?
Does this engine have a vacuum pump?

09-09-2010, 12:20 PM	#9
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: cranking compression IF dyno numbers / comparison is accurate AND it picked up HP/TQ with no dips that were not present before, AND the peaks are at the same RPM, then it should be a quicker car. If it is not, it must be something external of the engine. Does anybody disagree? And a -3 MPH should be more than .100 increase on ET. Right? What is different about the ring package and how did that show a benefit to you on the dyno? Less leak-down? More / less vacuum in the engine? How much difference to the old engine? Is the extra ring seal creating more HP at the same time creating more demand from the carb(s) & the fuel curve or float / needles & seats, now under par in the car as opposed to the dyno? Does this engine have a vacuum pump? __________________ Jeff Lee 7494 D/S '70 AMX Last edited by Jeff Lee; 09-09-2010 at 12:25 PM.