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

underground

By underground,
in Engines & Forced Induction

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underground Collaborator

underground

Posted
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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...

umsportsrb26240sx3.jpg

Morgs Veteran

Morgs

Posted
Posted

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

underground Collaborator

underground

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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...

ferni Grand Master

ferni

Posted
Posted

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 Grand Master

whatsisname

Posted
Posted

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

Guest two.06l

Posted
Posted
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.

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