vortecpro wrote:
A 427 that makes 600 HP @ 6200 RPM
A 427 that makes 600 HP @ 7100 RPM
Nobody has yet mentioned the shape of the torque curve?
How would you build those 2 engines?
The first one.....drop the CR and ad a pair of small turbos. With low boost you might see those numbers?
The 2nd one......high CR, a hot cam and big breathing .
The easy way is to consider the most efficient transmission which is a 100% efficient cvt. keeps the engine at peak hp at all times which maximises torque to rear wheels at all times and thus maximises the propulsion forward at all times.
Yea Bob i agree with what you said, and have come to the conclusion that you have to have great cylinder heads to accomplish that, that being a greater distance between peak tq. and peak H.P. ?? Thanks Mark
I've always said a good engine is a good engine. Some people say you need XX for a heavy car, but YY for a light car. I've always believed the trick was gearing, convertor to match the engine, and car. I'd never really thought about RPM but it makes sense the screamer would go faster, assuming proper gearing ect.
Someone mentioned big truck diesels and torque earlier. Let's compare a DD13 Detroit diesel to a comparable 800ish cubic inch race engine. (I don't think the turbo "really" matters, just power) The DD13 has 470 horsepower and 1650 pounds of torque. An 800ish cubic inch race engine could have something like 3 times the horsepower, and 2/3s as much torque. (guessing) Properly geared ect I suspect the race engine would get the 80,000 pound load up the hill quicker. However, the 2000 rpm diesel with similar cubic inches will last a million or more miles.
I used to be a people person, but people ruined it.
vortecpro wrote:I'am going to ask the same question I asked on the Chevelle forum.
"Which engine is faster down a dragstrip and why"
A 427 that makes 600 HP @ 6200 RPM
A 427 that makes 600 HP @ 7100 RPM
?
Absolutely and without doubt the 427 making 600 hp at 6200.
I will explain when I return from down under next week.
DV
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