Dyno'd today...

Discuss the RB20, RB25 and RB26 series engines.
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rbsileighty
Posts: 1694
Joined: Sun Feb 09, 2003 8:10 am
Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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Dynopack dyno...

Cond: 67.3 deg F

SAEhp: 174 @ 6139 - 11.5 psi 12.41 a/f tq: 146 @ 5793 - 10.6 psi 12.44 a/f

Base timing ~17degHybrid FMICApex Pod filter3" turbo back (no cat... RSR catback which has no premuff)RB25 turboSupra MKIV fuel pump (factory wired)Sard fpr set to 3 bar base pressure

Time to install the Power FC and PFC boost controller for round 2... purchased 3 rounds of dyno pulls... round 2 should come sometime soon

I have vids and graphs I'll post later... back to work


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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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numbers seem about right for a stock rb20 but for the rb25 turbo bit at 2psi more than stock seems abit odd...pfc should help out alot, nissan maps are VERY conservative.

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rbsileighty
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Joined: Sun Feb 09, 2003 8:10 am
Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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Definitely needs tuning...

Motor seems decent... comp/leak down numbers on a luke warm motor:

1- 150 3%2- 150 1%3- 145 3.5%4- 147 2%5- 141 2%6- 150 4%

...just needs to be dialed in... boost leak check tomorrow too

RB20DETodd
Posts: 3763
Joined: Thu Apr 07, 2005 10:30 pm
Car: 92 Nissan S13 coupe SE RB20DET

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rbsileighty wrote:Dynopack dyno...

Cond: 67.3 deg F

SAEhp: 174 @ 6139 - 11.5 psi 12.41 a/f tq: 146 @ 5793 - 10.6 psi 12.44 a/f

Base timing ~17degHybrid FMICApex Pod filter3" turbo back (no cat... RSR catback which has no premuff)RB25 turboSupra MKIV fuel pump (factory wired)Sard fpr set to 3 bar base pressure

Time to install the Power FC and PFC boost controller for round 2... purchased 3 rounds of dyno pulls... round 2 should come sometime soon

I have vids and graphs I'll post later... back to work

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Dano
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Car: '05 Nissan Frontier Nismo CC
'95 Nissan 240SX base
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Nice, I bet it's fun

-Dan

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blues14
Posts: 450
Joined: Tue Apr 19, 2005 2:16 pm
Car: 1995 Nissan 240SX GTS-t
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I would be dissapointed with those numbers, considering your running a fmic and rb25 turbo........definately sounds like some good tuning would make a world of difference.

TheOne
Posts: 1836
Joined: Mon Aug 09, 2004 4:28 pm
Car: 93 240sx FB
Location: Arlington, TX

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yeah how come you are makin less than a ka24de?, at more psi too.

just wondering, not tryin to say the car is better or anything cause i too like RB's.

what would the factory compression numbers be? is it 150-180 or so?

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rbsileighty
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Joined: Sun Feb 09, 2003 8:10 am
Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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Yeah, not to happy with the numbers... they are dynopack numbers, but still... car needs tuning

You have to remember it's only 2 liters... 2L is 2L if it's 4cyl, 6 or 8 etc...

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rbsileighty
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Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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l0nestar
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Hawt! I can't wait to get my RB25 swap started!

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Kansei240sx
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Joined: Mon Nov 01, 2004 10:17 am
Car: S13 - RB25 Circuit car
71 240z - street/track day car
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Thats rediculously low D: !

You should be making alot more than that!

Tuning needed badly, I hope you get that sorted out .

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rbsileighty
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Joined: Sun Feb 09, 2003 8:10 am
Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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Kansei240sx wrote:Thats rediculously low D: !

You should be making alot more than that!

Tuning needed badly, I hope you get that sorted out .
You and me both! I'll start tuning after I get my wheels, hubs, and brakes on... just got the Stoptechs in yesterday... should be soon!

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Hudsontec
Posts: 239
Joined: Tue Jul 05, 2005 3:40 am
Car: 1989 240SX w/RB20DET, 1991 S13 SE W/SR20DET

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Yeah I'm with TheOne. Why are you making less HP with a 25 turbo. My RB20 did 241 to the wheels stock with only a SAFC-II and manual boost controller. With my Side mount IC.

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rbsileighty
Posts: 1694
Joined: Sun Feb 09, 2003 8:10 am
Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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I think tuning has a lot to do with it... I'm hitting boost cut really early, so a lot more air is flowing than with the stocker (~4psi earlier than stock)

What dyno did you do your pull on? Remember dyno's are not a direct comparison unless you do a pull on the exact same dyno I did mine on... same brand should be close, but still won't be the same (dyno inputs etc)

What did you put in for your gearing?

Regardless... mine is low... got some work to do...

I've attached the files from my 3 pulls... if someone wants to put together some graphs... or just see the data feel free
Modified by rbsileighty at 1:24 PM 5/4/2006

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rbsileighty
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Joined: Sun Feb 09, 2003 8:10 am
Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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Run 2

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rbsileighty
Posts: 1694
Joined: Sun Feb 09, 2003 8:10 am
Car: 92 S13 Hatch w/ RB20 & 05 Audi S4 Avant 6MT

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Run 3


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