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Why not? :P

Ive seen other manufacturers put out difference power figures man v auto, maybe they are?

Because they're quoting the engine power as measured at the flywheel - i.e. before the drivetrain. Aside from different components or a different tune-up, there's no other way to account for the difference in power.

They're not accounting for the drivetrain because they're not talking about rwhp.

Because they're quoting the engine power as measured at the flywheel - i.e. before the drivetrain. Aside from different components or a different tune-up, there's no other way to account for the difference in power.

They're not accounting for the drivetrain because they're not talking about rwhp.

B-I-N-G-O and bingo was his name O. :P

Hi guys just thought i would add my 2 cents worth .i have a r33 gtst with a twin turbo rb 30/25 ..and with a manual ,at the moment im running 488.9 rwkw .and im about to put a c4 auto in from als race glides .and a dominater convertor .i will be running everything the same but from manual to auto ,so i will post up how much power i lose when the job is done .

cheers

There's little point in doing that aside from pure interest's sake. Racing converters are very different between stall speeds and this is where all the difference will come from. A 3000rpm converter will be different from a 5500rpm converter probably in peak hp but almost certainly in terms of the area under the curve.

Hi guys just thought i would add my 2 cents worth .i have a r33 gtst with a twin turbo rb 30/25 ..and with a manual ,at the moment im running 488.9 rwkw .and im about to put a c4 auto in from als race glides .and a dominater convertor .i will be running everything the same but from manual to auto ,so i will post up how much power i lose when the job is done .

cheers

i would look at a AOD aswell, it will give you a mech lock on over drive for street duties and still handle nines (800hp) (quick look on TCI, B&M and LenTech will confirm) all day long. Can race glides build decent AOD's as they are pretty specialised trannies? after speaking to a few Trans building companies in the states the AOD is the obvious choice for a tough street car with friday night drag action in mind.

Im currentley building a combo atm that will make around 360rwkw through a C4 (now an AOD) 5500rpm stall its running 3.55 gearing, so around 1600-1800rpm @ highway speeds depending on final tyre hieght choice.

Disregard the whole lot above if your car is not regulary street driven :D

ps i prefer to tune the car firs twith a stock stall (or up to 2500), then dial it in with the race converter...... tuning anything with decent power and a stall speed over 5000rpm can be a night mare.

Edited by URAS
ps i prefer to tune the car firs twith a stock stall (or up to 2500), then dial it in with the race converter...... tuning anything with decent power and a stall speed over 5000rpm can be a night mare.

It becomes a dollar issue with custom converters though. If it was a Windsor/C4 combo then a stock converter will work. But when you start mixing your manufacturers it means getting a second custom job made just to tune. PITA.

It becomes a dollar issue with custom converters though. If it was a Windsor/C4 combo then a stock converter will work. But when you start mixing your manufacturers it means getting a second custom job made just to tune. PITA.

too true but the end result is far superior and $800-$900 dollars is pocket change compared to the average 10-15k engine package.

If anyone saw the thread I posted in the Drag section on that 8-sec daily driver they might have noticed it runs an AOD variation too. They're certainly becoming a serious option now. I reckon they will be in aus in about 10 years. :D lol

Whats an AOD guys ? Some sort of lock up clutch in the converter ?

Thats the best part of my jatco i think, and why i didnt mind going to 3500 stall. Once locked up, no difference in fuel ecconomy when crusing.

Mike at MV autos said while i was talking about custom auto controllers, that i could try locking up the converter once in top gear at drags, . I was worried it wouldn't hold but he said it would. Said one of his customers had gained nearly 10 mph doing it !

Locking up the converter is also great for tuning the low end/light load on the dyno....

Without it though , thats where the mainline dynos rpm tracking is real handy !!! very handy feature when working with autos !

Gary

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