My first trip to the dyno, s13 RB25det

Discuss the RB20, RB25 and RB26 series engines.
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matafied
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Joined: Mon Jan 08, 2007 8:15 am
Car: 1989 240 rb25det 1992 240 rb25det

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Well I finally made it to the dyno with my daily driver. Just not sure what to think of it yet. Ran the first run on stock boost, then the second on 10psi.Let me know what ya think??? My temp gauge crapped out on me and the car was running super cool due to a stuck thermostat, plus it was reading a little on the lean side, I think idk anyways.Everything is stock except for exhaust, walburo fuel pump and mbc. I was using the safc for monitoring, mods are in my signature

http://is.rely.net/3-117-6453-...A.jpg

http://is.rely.net/3-117-6454-...Q.jpg

if anyone wants the graphs on stock boost let me know i'll post em up
Modified by matafied at 4:59 AM 3/26/2007


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Shocker
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Car: 89 240sxHB rb26/30

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healthy, almost the same numbers mine put down at 11 psi Ish. Nice.

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s14kouki
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Car: 1998 240SX SE

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what was holding you back from going over 10psi?

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matafied
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Car: 1989 240 rb25det 1992 240 rb25det

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Well I did do a 13ish run but didn’t see any improvements; I think my timing needs to be tweaked on. I wanted to see 300 but maybe next time when im not in such a hurry. i just realy wanted a good base line number to get an idea for my other rb car

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95-S14
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so what are the usual numbers for a RB25 swapped car that is mostly stock still?

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Shocker
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95-S14 wrote:so what are the usual numbers for a RB25 swapped car that is mostly stock still?
who puts a 25 in and leaves it stock?! If you mean boost... with supporting mods. Stock boost should be around 250whp give or take.

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95-S14
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Thats what i meant, like without major mods. Still stock turbo and boost.

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matafied
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Car: 1989 240 rb25det 1992 240 rb25det

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yea on 7psi i put down 252whp, stock turbo! i really dont have anything done to this car. about as stock as you can get. i drive this car everyday

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midnightsliding
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looks good wish i could of made it out their. 270 is nice for any DD s13. **** all my friends are making around 20rwhp in their s13s and its feels pretty nice pretty sporty and nice for city driving with good response

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s14kouki
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Car: 1998 240SX SE

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250whp at stock boost is pretty dam high considering the stock 25 is rated at 250 to the crank.

your 252whp at 7psi is a good number, but im assuming you had the power fc in there with some tuning done and probably a few other small mods.

Stock boost, stock tuning, stock everything with and intake and exhaust(since everyone is going to have those mods), should probably put down around 225-230whp.

i myself put down 251whp @ 10psi, but i had a silencer in my exhaust, no greddy intake manifold(so my fmic piping was getting hot over the radiator) and a mildly tuned Mine's ecu. So bring boost down to 5-6psi and lose the ecu, i would probably go down to around 230whp.

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midnightsliding
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i think he was using the SAFC for tuning and he is running the stock intake manifold.

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s14kouki
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Car: 1998 240SX SE

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Oh yea i didnt see the daily driver part, i assumed it was the garage project listed. Nevermind

Now i know why you didnt want to push it past 10psi.

Those are awesome numbers then with the stock turbo and no power fc. Are you sure it was only at 10psi? Either you were running more boost then you thought or my silencer in my exhaust is restricting a lot of power.

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eh?
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s14kouki wrote: Either you were running more boost then you thought or my silencer in my exhaust is restricting a lot of power.
Why did you dyno with a silencer installed? Probably pick up atleast 20whp without it

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matafied
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yep only 10psi, and safc. all stock intake and exhaust manni +turbo

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s14kouki
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eh? wrote:
Why did you dyno with a silencer installed? Probably pick up atleast 20whp without it
Kind of curious to see how much power i was putting down on a daily basis and i really didnt think it was going to make that big of a difference.

gawdzilla
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s14kouki wrote:
Kind of curious to see how much power i was putting down on a daily basis and i really didnt think it was going to make that big of a difference.
silencer removed makes a big difference

RBKIDD
Posts: 282
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Car: 92' RBsilvia
07' TBSS
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nice man looks good how did u first start it aftr u did all those upgrades.bc i did a gt3071 turbo,bigger injectors and a z32 mas,the speed shop told me that i cant start it ,so i was wondering what u first did to get it started after u did the upgrades. thanx

RBKIDD
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Car: 92' RBsilvia
07' TBSS
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talking about the garage project

zdrifter
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Car: 1978 Datsun 280z

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I just made 234whp on no tune, and ran rich above around 4,000rpm. So rich it disappeared off the chart haha, I just wanted a base number before I get my ECU. That was 4th gear pull, at the top of 4th wheels were turnin 140mph.

RBKIDD
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Joined: Thu Mar 22, 2007 10:30 am
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07' TBSS
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so with the garage project you were able to start it on the old tune.thanx for the response

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matafied
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Car: 1989 240 rb25det 1992 240 rb25det

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powerfc allows you to change maf's in the settings before you start your motor. all the other stuff turbo, exhaust, intake etc. is fine for the warm up and before you tune. i would not go screeming down the road! i dont have my injectors yet so i didnt have to acomadate them

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blurrbosi
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nice

RBKIDD
Posts: 282
Joined: Thu Mar 22, 2007 10:30 am
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07' TBSS
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how user friendly is the powerfc.do u think i will do ne damage if i start the car wit bigger injectors wit the stock tune


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