Quote:
Originally Posted by ybbiz34
Whoa . . . no need to get so defensive man. Aren't we on the same team? lol.
The M156 and M159 don't differ in terms of design. They are both 6.2L NA V8s - just like the M177 and M178 will be 4.0L biturbo V8s.
That's the point that I'm trying to make.
The largest chunk of the output difference is represented by different software tuning between the motors.
Other power gains were achieved in the SLS Black (M159) due to new camshafts, specially coated bucket tappets, a more efficient intake tract, more-durable crankshaft bearings, and a titanium exhaust system. They beefed up the parts. They didn't redesign a new power plant from the ground up.
I think what you're doing is very misleading. You are making it seem like the M156 and M159 are different engines with different designs.
And you're also making the same misleading argument about the M177 and M178.
The power output between the GT and C63 will of course differ, but their motors will share 90+ percent of the same internals and the exact same design.
I would be willing to bet you $100 PayPal that I'm right.  |
Same but different.
They are obviously related & based on the same block/architecture but they're not exactly the same.
Take the USDM 8th-gen Civic SI 2.0L I-4 vs the JDM (FD2) Civic Type-R 2.0 I-4.
Yes, they are both from the K20 block, both displace 1998cc, same block, same design. But at the same time, they are quite different. K20Z3 in the former, K20A in the latter; 11.1 C/O vs. 11.7, 197bhp vs 225ps, different heads, cams, redlines, etc.
So while both the Civic SI & Civic Type-R are related & have related K20 engines (i.e., same block/architecture), they are different engines. K20Z3 =/= K20A
Similarly, while both the M156 & M159 are 6.2 AMG V8's derived from the same AMG 6.2 M156 base block and manufactured in the same foundry by the same people, the known differences (in addition to the ones you mentioned above) such as a different [more aggressive] valvetrain, dry-sump lubrication, individual throttles, etc. do effectively render them different engines. It is not just "tuning" that yields near 100 BHP in an NA engine.