Gollum Posted September 22, 2011 Share Posted September 22, 2011 ...I see people quoting manufacturer's engine specs (some of which are known to be generous)... For claims of 80+ ft/lbs of torque per liter, I feel it should be pointed out that F1 engines are only slightly more efficient than that. Manufacture specs are regulated and the few times that there have been cars that don't live up to ratings there's costly recalls for the manufacture. Some examples are the early RX8's, and the early DOHC Cobras. In both cases the manufacture took back cars and rebuilt engines, and then later fixed issues or changes the rating in subsequent years. By contrast though, there's no laws or regulations mandating that manufactures can't underrate their performance. The new 2011 Mustang GT's with the Coyote V8 are an example, where even the very low dynos are showing figures that show that Ford probably underrated the engine a good 3-5% at least. Some of the dynos that are known to be "pretty number" dynos can show nearly at the wheels what should be at the crank, which definitely starts to indicate that something is up. Same thing happened with the 03-04 cobras, but it wasn't as impressive I think because it was a supercharged engine and Ford was just being cautious with their previous flops. Point being - it's more common for there to be underrated engines than overrated engines from every shred of evidence I've experienced and seen. And on the second point you brought up. F1 engines by what HP they're supposedly running, at the RPM limit they have, they're making AT LEAST 100lbs per liter at peak HP and that's with a bunch of regulations that restrict power. If you believe what has been said that they're capable of over 1,000hp if there weren't restrictions then assuming the RPM stays close (which might not be true) then that would put torque at over 116lbs per liter! All that said, I do believe that things vary dyno to dyno and comparing figures against each other can be taken way too seriously and is best left to just the realm of speculation. But that said some of the people that have posted have actually had their engines on ENGINE DYNOS which are incredibly accurate. I'm sure tony could chime in here, but just looking at what RPM some L engines we know operate at, and calculating what HP the engine is actually putting down via performance numbers, it's amazing what torque has to be created in order to get those numbers. It's certainly not F1 numbers, but it's certainly more than most NA production engines. Quote Link to comment Share on other sites More sharing options...
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