Engine Dyno info from Mercruiser

[tpepmeie]

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.

[boostedmaxPSI]

Interesting things... Fuel was race fuel 103 octane for the LT1 and 98 octane for the LT5.

Did you catch the Engineers names for the LT5 test. Both names appropriate...

Thanks for sharing.

[Kevin]

Originally Posted by Blue Flame Restorations

This is an actual LT5 Engine Build Booklet. This documents the entire build of the engine and is all hand written by the assembly technician. LT5 Engine 046. Look at the engine closely. There are several characteristics that differ from typical production LT5 motors.

any chance you could scan/copy that and send me a copy? would love to add it to my zr-1 stuff folder

[Ronstar]

shouldnt the HP and Torque curves cross at 5252? something seems amiss

[ZZZZZR1]

Dyno sheet's have been discussed for years....

http://www.zr1.net/forum/showthread.php?t=12340

[Blue Flame Restorations]

Originally Posted by ZZZZZR1

Dyno sheet's have been discussed for years....

http://www.zr1.net/forum/showthread.php?t=12340

And I'm guessing they probably will be for years to come. LOL

[ZZZZZR1]

I've spent hours talking to the NCM and GM lawyers....

They aren't even interested to hear a valid arguement about why it's worth releasing them. (even selling them)



David

[Fully Vetted]

Originally Posted by Kevin

any chance you could scan/copy that and send me a copy? would love to add it to my zr-1 stuff folder

I'd actually be interested in a copy as well if it's possible.

[mike100]

Ignorance is bliss... I don't really need to know what my particular engine put out, but it would be interesting to know what the variation from unit to unit would be (much of which would likely be cam timing variations).

Like I said, not really losing sleep over this one.

[LGAFF]

I kind of let it go, there was some talk that pushing it GM might just destory them to avoid the hassle....