Quote:
Originally Posted by Quinten_33
Does the Z/28 have to be faster? What if it’s just the better track car? GM is making at least 3 new twin-turbo DOHC V8s, and there’s bound to be N/A versions. A Naturally aspirated 5.4L DOHC V8 with 540hp would be lighter, smoother, and more fuel efficient than the LT4; all characteristics to look for in a track car, imo. Add Carbon Ceramic brakes, remove the rear seats, OFFER feature deletions and super lightweight seats, and you’ve got a Z/28. It’s got all the features you want in a daily driver, and all the capability you need to lap tracks.
I mention fuel efficiency because the LT4 is a gas guzzler and more MPG=more track time.
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A 5.4L DOHC engine won't necessarily be lighter then the LT4 which is about 530 pounds not to mention won't necessarily produce 540BHP. The old LT5 engine was about 600 pounds so if you want them to just stick a DOHC head on the Gen V SBC then expect that amount of weight taking off a few pounds. Also GM just generally doesn't tune its engines to the point where it will make 100BHP/L which I know is what you based that about 540BHP rating on.
Here is the thing, GM can take their 6.2L motor with the head and cam package and make that 540BHP on a lighter and more compact design then a DOHC head on an LT1 engine can pull off making it the superior choice for track use.