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Old November 13th 05, 10:00 PM
Jim Carriere
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Default Chevy LS2 and Trans??? any real issues besides weight

MrV wrote:
Hey Dan good info. Question what is considered "High Load"? My plan
is to run the system at a max of 65%. from personal exp i know running
my auto at 5k rpm will shorten its life but i also know that it'll run
damn near forever at 3500 rpm.


Question for you: What torque/rpm setting do you use to arrive at 65%?

Take a generic direct drive aero engine, and some ballpark figures for
the sake of an example to explain my question:

Let's say cruise flight is at 7,000 feet, wide open throttle, and near
max rpm. Max power is at sea level, wide open throttle, max rpm. More
numbers- let's say this cruise setting translates to 2,500rpm at 24".
Max power is 2700rpm and 29". Use some simple math and simplifying
assumptions (flat torque-rpm curve) about the engine to calculate
"percent" power...

2500/2700 x 24/29 = 77%

(pretty close to the popular definition of cruise power, 75%)

Anyway, just curious what numbers you use to get 65%. Note I don't have
any issue with the figure, I realize it's an arbitrary decision in
performance/reliability tradeoff.

By the way, the first hit on Google for keywords 'chevy ls2 rpm
horspower' gives 400hp at 5200rpm.