286 rwkw out of stock RB26DETT, 15 PSI, dyno!

[underground]

Hey Guys,

Well, we took the car back for day #2 of dynoing the RB26DETT 240SX..

Yesterday, we experienced some motor knock, and found out the timing was advanced to 22 degrees...

Today, we retarded the timing to 18 degrees and gapped the spark plugs to 0.8....

At factory PSI, the car dynoed 251kw, and 263.6 lbs of torque...93 octane pump gas..

At 14.7 PSI , car dynoed 286kw and 318.3 lbs of torque...93 octane pump gas..

I believe with a SAFC, we can smooth out the power curve and pick up another 12-19 kw....

Here's the dyno graphs showing baseline and high boost...chart shows rear wheel Horse Power as measured on Dyno Jet...

[Amaru]

Its definately not a stock motor to be pulling those figures (well from everything I have seen)

[Morgs]

For reference: Dynojet has nowhere near the drivetrain loss of a dynodynamics dyno, hence the large figure.

[Amaru]

For reference: Dynojet has nowhere near the drivetrain loss of a dynodynamics dyno, hence the large figure.

I retract my above comments then

[krzysiu]

Probably thats why it is so high. A good power for a stock engine would be around 230kw depending from which model skyline the Engine came from.

[Morgs]

For reference, my stock motor from a R32 made 253rwkw @ 1 bar dynodynamics, but that is the usual 98 octane.

93 octane would be a serious disadvantage, and, although its hard to estimate I'd figure with my basic math it'd be somewhere between 190rwkw and 205rwkw dynodynamics.

There is certainly a bit more power in a better tune

[raist60]

Morgs: Americans actually use a different octane rating, they have MON (motor octane) we have RON (research octane) his 93 MON is actually the same as our 98 RON.

http://en.wikipedia.org/wiki/Petrol

[Morgs]

You're indeed correct, something I've overlooked, apologies.

[underground]

My motor is a R33 RB26DETT....

Keep in mind, I am RWD! The motor is in a 240SX (AU 200SX/Silvia)

I don't lose anywhere close to the drivetrain loss you AWD guys do...

And while the difference in your dyno dynamics is different, it's not that big...

I will get some dyno comparisons, but its no more than 20kw from seing my friends cars...

[fatz]

american dynos

there a winner always reading higher

sound good anyway

what would i know i have never dynoed my car

lol

[ferni]

Most of us GTR boys don't do awd dynos, we drop our front shaft, and go on a RWD dyno...

My RB26DETT stock motor/ecu, with adjustable cam gears and an exaust, boost uped to 1bar (~15psi) pulls about 280rwkw in shootout mode, which is considered good on standard turbos/cams etc....

Maybe you have adjustable cam gears? where do you find boost coming on full?

My motor is a R33 RB26DETT....

Keep in mind, I am RWD! The motor is in a 240SX (AU 200SX/Silvia)

I don't lose anywhere close to the drivetrain loss you AWD guys do...

And while the difference in your dyno dynamics is different, it's not that big...

I will get some dyno comparisons, but its no more than 20kw from seing my friends cars...

[whatsisname]

You can't draw a "direct comparision" between the US Dynojet power figures vs. the Aussie Dyno Dynamics - simple as that! The same car run on both dynos back to back would give a markedly different result... the higher figure being on a dynojet.

The late Todd Wilkes did quite a bit of research into these two dynos and published the results for all to see on his website - http://www.twinturbov8.com/dynostuff.htm

This is not an attempt to take anything away from your results underground... just stating some basic facts bewteen the two dynos.

[Guest two.06l]

Its definately not a stock motor to be pulling those figures (well from everything I have seen)

THIS CAR WAS A STOCKER WITH A BOOST CONTROLLER AND AN EXHAUST.

[Guest two.06l]

Its definately not a stock motor to be pulling those figures (well from everything I have seen)

and this ones not...lol

[ferni]

two.06l: adjustable cam gears ? what ECU? what boost?

[ferni]

How much do the 240SX's weigh?

[underground]

two.06l: adjustable cam gears ? what ECU? what boost?

Stock Cam Gears, Stock ECU, 14.7 PSI...

The 240SX weighs 2950 lbs...

[ferni]

2950lbs = 1340KG, similar to an R33 Gtst.... take it to the quater mile strip, see what MPH it runs... compare it with similar powerd Gtst MPH...

[Squizz]

My stocker made 206.3kw in shootout mode at all four at .9 bar, for those who can be bothered to work out the 2wd/4wd conversion (if there is a definative one) it may be of help...

[Guest two.06l]

two.06l: adjustable cam gears ? what ECU? what boost?

no cam gears as yet, power fc running default map on 15psi. we are shooting for over 300rwkw. have just fitted engine pipes, will be fitting cam gears(with DIRTgarages secret specs) and going for a full tune.300 should not be too far away.