Engine Advantages Rollers - Whats peoples opinion of them?

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04-05-2007 | 11:07 PM

#81

kennyA

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From: Dresden

Hi chip

convert your BHP power figures to Kw. 40bhp ~ 30kw. a lot of power lost (not lost, converted)

thats a lot of heating.

I don't believe the RR.

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05-05-2007 | 01:13 AM

#82

Chip

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Quote:

Originally Posted by Billabong

Quote:

Originally Posted by Chip-3Door

Quote:

Originally Posted by Billabong

To get an accurate flywheel reading, engine dyno' it.

Yep, thats the way to get a SPOT ON reading of what your engine would do if neither it, or the exhaust, or the intercooler etc were anywhere near a car

Oh and potentially if it was run leaner too, if you look at all the SCS dyno plots of course!
(12.5 in the car? umm NO!)

Leaner than what?

Leaner than it is in the car, and hence a totally innacurate representation of what power the engine actually makes in the car

Quote:

When mapping for power, surely you 'map for power' and there's an 'ideal' AFR for power as I'm sure you're aware.

Ideal for power is 12.5, which is also pretty ideal for melting if its a YB driven hard, I see little point in Dyno'ing an engine to tell you what it would make if you accepted it was about to be destroyed by heat, why not map on the dyno to the same AFR as in the car, so the customer actually ends up with at least a vague indication of what power he actually has in his car?

Quote:

I'm not blinkered enough to think my car makes exactly the same power once in the car, as obviously there are things to be taken into account - hence why it's then tweaked/optimised once in the car.

Yes, two different roles:
1) map for a figure for the customer that it will never run
2) actually try and keep it in one piece at a lower figure

Quote:

Of course not everyone puts the AFR on their dyno printouts, which makes it harder to compare.... but are you suggesting a mapper should deliberately map a car rich on the engine dyno? There's still a strong possibility it's going to be different once in the car (AFR)