OT: Corvette ZR1 to get NA DOHC 6.2L V8?
01-12-2017, 06:46 PM
#1
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OT: Corvette ZR1 to get NA DOHC 6.2L V8?
This thing will be fast (swan song for the front-engine Vette before Mid-Engined Models come next or maybe this is the engine for the next gen mid-engined car - some debate on their forum):
http://www.corvetteforum.com/article...mpaign=content
http://www.corvetteforum.com/article...mpaign=content
01-12-2017, 07:07 PM
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DOHC V8s are not really sensible in an environment that lacks displacement regulations. OHV provides a lighter and smaller engine that allows for better weight distribution and a lower center of gravity. Given that the LT1 equipped Corvettes get around 30 mpg highway, better than many cars with significantly smaller engines, I do not understand why GM wants to go DOHC. There simply exists little tangible advantage for a DOHC V8 in this situation.
01-12-2017, 07:31 PM
#4
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They have a new 6.2L race engine in the Caddy DPi. OHV though.
01-12-2017, 10:07 PM
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The last 7.0L Z06 OHV only made 505hp - that would be a huge improvement...
The large cylinders at that point make it difficult to spin the motor easily with such heavy parts to achieve good power (even 6.2L is pretty limiting in that respect).
The lack of a displacement ceiling provides a lot of freedom, but you can't fully leverage that into an optimum sports car engine, unless you also are not limited to 8 cylinders (7.0L makes more sense in a 10 or 12 cylinder engine to keep reciprocating parts light).
The large cylinders at that point make it difficult to spin the motor easily with such heavy parts to achieve good power (even 6.2L is pretty limiting in that respect).
The lack of a displacement ceiling provides a lot of freedom, but you can't fully leverage that into an optimum sports car engine, unless you also are not limited to 8 cylinders (7.0L makes more sense in a 10 or 12 cylinder engine to keep reciprocating parts light).
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01-12-2017, 11:55 PM
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We could argue about the character of an 8.0L or larger V8 and its suitability as a sports car engine (my first car was a Caddy 472 with 575 ft-lbs), but I think we would agree that's not going to happen with CAFE standards and GM's desire to sell its cars abroad. A smaller displacement DOHC motor is more realistic in the future, right (probably eventually decreasing to 6 cylinders)?
01-13-2017, 12:14 AM
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We could argue about the character of an 8.0L or larger V8 and its suitability as a sports car engine (my first car was a Caddy 472 with 575 ft-lbs), but I think we would agree that's not going to happen with CAFE standards and GM's desire to sell its cars abroad. A smaller displacement DOHC motor is more realistic in the future, right (probably eventually decreasing to 6 cylinders)?
Just look at the Challenger or Hellcat. Both V8s (albeit the latter comes with a bolted on superhcarger).
01-13-2017, 12:27 AM
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CAFE is a domestic standard and they are scheduled to become much more strict soon...
01-13-2017, 12:37 AM
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Could be, but we're probably going to see a very powerful ZR1 in the current body. Just the engine is a mystery...
