Engine Dyno info from Mercruiser - ZR-1 Net Registry Forums

tpepmeie · 12-10-2012

Really interesting stats on page 5. Test 1 is the net hp, as installed with fixed calibration. In researching this, test 3 has optimized spark timing ("mbt"), but standard fueling (12:1 or even richer). Conclusion - in stock trim, there is virtually no difference due to spark advance.

Test 4 has optimized spark and fuel (Leanest Best Torque). Here there is a small gain over the baseline of 4 lb-ft and 1 hp.

Test 20 is with synonymous headers and optimized calibration.

Great info. Thanks for sharing.

12-10-2012	#21
tpepmeie Join Date: Aug 2005 Location: Fishers, IN Posts: 815	Re: Engine Dyno info from Mercruiser Really interesting stats on page 5. Test 1 is the net hp, as installed with fixed calibration. In researching this, test 3 has optimized spark timing ("mbt"), but standard fueling (12:1 or even richer). Conclusion - in stock trim, there is virtually no difference due to spark advance. Test 4 has optimized spark and fuel (Leanest Best Torque). Here there is a small gain over the baseline of 4 lb-ft and 1 hp. Test 20 is with synonymous headers and optimized calibration. Great info. Thanks for sharing.