Quote:
Originally Posted by waterman
LS7 is NA 7 ltrs/427 ci. 505hp @ 6500 RPMs. 470-481 ft/lbs. TQ @ 4800 RPMs. 454 lbs. assembled.
LT6 is NA 5.5 ltrs./335 ci. 600-630hp @ 8000-9000 RPMs(est.) 480-550 ft/lbs. TQ (est.) @ ? RPMs. Weight to HP/TQ ratio will be significantly better than LS7.
As for FMCs 5 ltr. FPC. Yes, LT6s 335 is greater than GT 350s 305.
However, that LT6 has been homologated in C8.R for nearly 2 IMSA seasons in both sprints and endurance races... with great success.
Ford's Voodoo... not so much.
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Right, GM's FPC seems to be designed towards the orientation with lesser vibrations and
actually taking advantage of the FPC design. The Ford FPC is a compromised design for particular engine note and to try and take advantage of the combined-runner intake manifold as much as possible. Plus, GM has already ran the 5.5L FPC through several endurance races. The Ford FPC could only last typical ~2-hour or less races.
Quote:
Originally Posted by Katech_Zach
Torque wont be anywhere close to the LS7's torque. 480 ft/lbs at 8500 rpm is 775 hp. If it is peaking at 615 hp at 8500 rpm theoretically, it'd be about 380 ft/lbs. Peak torque maybe 425...
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I think it'd be wise to look at the Ford 5.2L FPC and it's power... 526HP @ 7500 RPM and 429 lb-ft torque @ 4750 RPM. Given the way you projected the torque figures, in a linear fashion through the RPM range, the Ford engine should be making 612HP @ 7500 RPM. I'm confused because then you say "Peak torque maybe 429..." where the assumed that people typically speak about are peak numbers... and I would certainly bet a 5.5L DOHC FPC will make at least the same peak torque as a [known] 5.2L DOHC FPC.