239kw, completely stock RB26DETT, dyno graphs!

[underground]

Hey guys,

Well, we dynoed my RB26DETT 240SX today...

The first time we dynoed at factory boost settings, which on my boost guage was 9 PSI...

We made 320 rwhp or 239 kw, I believe this is about average for stock ecu, stock motor, etc...

Our importer thinks the motor had cams, but we aren't sure... It does have a lope to it, and if I was a betting man, I would think there is...

Maybe you guys can took a look at my dyno chart and give me an idea of what you think...

On the second pull, we upped the boost to 15 PSI, or 1 bar...The car pulled timing and started knocking...

I'm not sure if it was the fact we only had 93 octane gas in the tank, or whether the timing might be advanced too much...

The first graph is of the stock pull at 9 PSI... The second graph shoes all three pulls, with the last two being at 15 PSI...

Thanks!

Chris

[underground]

Do you guys think the car has cams based on this dyno?

I was really impressed for having a totally stock motor, stock ecu, etc...

The only mods were downpipe and exhaust...

Boost controller turned to 15 PSI for the last two runs...major knocking...and not sure why...

[krzysiu]

Damn, from those results i think it would have cams. Dont think a stock rb26 would pull that hard.

[jaik]

93 octane fuel? We use minimum 98 over here in Oz.

JK

[robbo31]

The US uses a different octane rating system to us. We use RON (Reasearch Octane Number) and the US uses MON (Motor Octane Number).... Japan uses a combination of both...

more here.....

http://www.motorcycle.com/mo/mcnuts/fuelron.html

[Roy]

I think you will find that the US rate their fuels differently to us in OZ, so 93 isnt equiv to OZ 93RON, actually i cant recall the unit they use but its not RON.

I take it when you say stock motor, you arent including exhaust, filter, intercooler etc With exhaust, good IC and filters and 1 bar of boost id say that would be pretty typical rwkws for an RB26.

[Busky2k]

The US use a (MON+RON)/2 method. Not just MON. For all intent and purposes, our 98 octane stuff is around 92 "US" octane using the above method.

[Nismo_Boy]

Don't forget US dyno's also read a higher reading then our one's..

[underground]

No, it's the standard Dynojet... Mine is programmed for the Skyline, Silvia's, etc...

So, it shouldn't read any different...

[underground]

Yeah, for 9 PSI, it's very impressive.. The sound is so loud of those turbos...

The guys that were there were commenting on how nice it sounded..

You would have really thought it was two HKS turbos with all the noise...Very loud for stock...

[underground]

But, what do you guys think about the whole cam situation? Do you think it has them?

Also, why do you think we were getting knocking on the 15 PSI run?

We think that the timing may have been advanced by whatever Japanese person last had the motor... We assumed it was stock and never messed with it...

But after the knocking tonight, and the the fact that it looks advanced, we are going to check it...

Tomorrow we will be adding 118 octane race fuel and giving a 15 PSI pull...

[hungry6]

Just from the graph she looks pretty much stock, there are other stock rb26 pulling higher figures in oz.

Also i believe and knows dynojet dyno give a higher reading than our dyno dynamic ones.

Don't let the low number dicourage u, there are ppls on here with huge hp from a stock motor with some bolt on stuff,

A cam motor has a sharper rise ihp section dependant where it comes on and alot of time when u get a motor, you usually get the aftermaket turbo free before the cams.

Aftermarket cam gear is another giveaway.