Jump to content
SAU Community

Recommended Posts

I went to the 'Dyno B' and got my car

dyno'd. Except i only got about 163rwkw 'Dyno B', unlike 193rwkw which i got at 'Dyno A'.

The guys at 'Dyno B' said that peak power dropped off at about 5000rpm, when it actually

should still be increasing. The only thing i have changed since the first dyno was, i installed a S/S

inlet pipe between AFM & turbo.

The power curve was fine at 'Dyno A'. Have you ever come across this before?

Both dyno runs showed good AFR's.

What would be the more appropriate power output figure for my current mods.

Mods:-

1993 R32 Skyline

RB20DET

Stock internals

5-speed manual

R33 S1 turbo

Trust front mount intercooler

Full exhaust (Split 3' dump/front pipe)

GTR fuel pump

Boost controller running at 14psi

Re-mapped ECU

Air pod

S/S inlet pipe

Edited by lows_13
Link to comment
https://www.sau.com.au/forums/topic/166491-power-figure-issue/
Share on other sites

163rwkw sounds realistic

lots of things can affect the readouts, post both dyno sheets

one could have air temp correction, the other might not

one could be in a different gear or different ramp rate etc

Dynos can be calibrated differently therefore showing that some cars have less powerful then they do on a different dyno. The stainless steel intake pipe shouldn't have made any difference as the only problem i've heard of is with the stock plastic one contracting under suction and limiting air flow so if anything the s/s one should be better. my suggestion would be to go back to dyno A and get a re-run on that

most Rb20's with the 25 turbos make any where from 160 to 180 ish rwkw, even more if they are pushed to 14 psi. but for the sake of it we'll assume 12 or so psi.

dont be too fussed about different dyno reads out tho, does the car feel any different on road compared to both dynos?

maybe the stainless inlet pipe has made your car slower/less powerful? I mean if that's the only thing you've changed and your power has gone down... how does it feel to you?

maybe the stainless inlet pipe has made your car slower/less powerful? I mean if that's the only thing you've changed and your power has gone down... how does it feel to you?

Power feels about the same after the S/S inlet mod.

Theres a lot more turbo sucking sound, thats about it.

The ambient temps clearly show the 2 runs weren't done on the same day, probably not even the same month! Is it any wonder then that you encountered differences. Although I would expect the colder day to produce better power.

Are both dynos the same model? Same manufacturer?

They say that each 3 degree increase in intake air temp makes a 1% reduction in power.

So for a 20 degree (at least) increase in temp thats probably 8% power just there, compounded by the hotter air going through the intercooler...

So more like 10-15% power drop from increased temp and your getting to be in the same ballpark kW reading.

Rhett

  • 3 months later...

im going with the 160 mark because near on 200kw? on 14psi with a tiny 2lt engine?? hahah no chance... not with a standard r33 turbo.. ive driven one of those b4 and damn they are torqueless and slow :rofl: sorry dude but theres no chance urs makin near on 200rwkw

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • From there, it is really just test and assemble. Plug the adapter cables from the unit into the back of the screen, then the other side to the car harness. Don't forget all the other plugs too! Run the cables behind the unit and screw it back into place (4 screws) and you should now have 3 cables to run from the top screen to the android unit. I ran them along the DS of the other AV units in the gap between their backets and the console, and used some corrugated tubing on the sharp edges of the bracket so the wires were safe. Plug the centre console and lower screen in temporarily and turn the car to ACC, the AV should fire up as normal. Hold the back button for 3 sec and Android should appear on the top screen. You need to set the input to Aux for audio (more on that later). I put the unit under the AC duct in the centre console, with the wifi antenna on top of the AC duct near the shifter, the bluetooth antenna on the AC duct under the centre console The GPS unit on top of the DS to AC duct; they all seem to work OK there are are out of the way. Neat cable routing is a pain. For the drive recorder I mounted it near the rear view mirror and run the cable in the headlining, across the a pillar and then down the inside of the a pillar seal to the DS lower dash. From there it goes across and to one USB input for the unit. The second USB input is attached to the ECUtec OBD dongle and the 3rd goes to the USB bulkhead connected I added in the centre console. This is how the centre console looks "tidied" up Note I didn't install the provided speaker, didn't use the 2.5mm IPod in line or the piggyback loom for the Ipod or change any DIP switches; they seem to only be required if you need to use the Ipod input rather than the AUX input. That's it, install done, I'll follow up with a separate post on how the unit works, but in summary it retains all factory functions and inputs (so I still use my phone to the car for calls), reverse still works like factory etc.
    • Place the new daughterboard in the case and mount it using the 3 small black rivets provided, and reconnect the 3 factory ribbon cables to the new board Then, use the 3 piggyback cables from the daughterboard into the factory board on top (there are stand offs in the case to keep them apart. and remember to reconnect the antenna and rear cover fan wires. 1 screw to hold the motherboard in place. Before closing the case, make a hole in the sticker covering a hole in the case and run the cable for the android unit into the plug there. The video forgot this step, so did I, so will you probably. Then redo the 4 screws on back, 2 each top and bottom, 3 each side and put the 2 brackets back on.....all ready to go and not that tricky really.      
    • Onto the android unit. You need to remove the top screen because there is a daughterboard to put inside the case. Each side vent pops out from clips; start at the bottom and carefully remove upwards (use a trim remover tool to avoid breaking anything). Then the lower screen and controls come out, 4 screws, a couple of clips (including 3 flimsy ones at the top) and 3 plugs on the rear. Then the upper screen, 4 screws and a bunch of plugs and she is out. From there, remove the mounting brackets (2 screws each), 4 screws on the rear, 2 screws top and bottom and 3 screws holding in the small plates on each side. When you remove the back cover (tight fit), watch out for the power cable for the fan, I removed it so I could put the back aside. The mainboard is held in by 1 screw in the middle, 1 aerial at the top and 3 ribbon cables. If you've ever done any laptop stuff the ribbon cables are OK to work with, just pop up the retainer and they slide out. If you are not familiar just grab a 12 year old from an iphone factory, they will know how it works The case should now look like this:
    • Switching the console was tricky. First there were 6 screws to remove, and also the little adapter loom and its screws had to come out. Also don't forget to remove the 2 screws holding the central locking receiver. Then there are 4 clips on either side....these were very tight in this case and needed careful persuading with a long flat screw driver....some force required but not enough to break them...this was probably the fiddliest part of the whole job. In my case I needed both the wiring loom and the central locking receiver module to swap across to the new one. That was it for the console, so "assembly is the reverse of disassembly"
    • But first....while I was there, I also swapped across the centre console box for the other style where the AV inputs don't intrude into the (very limited !) space.  Part# was 96926-4GA0A, 284H3-4GA0B, 284H3-4GA0A. (I've already swapped the top 12v socket for a USB bulkhead in this pic, it fit the hole without modification:) Comparison of the 2: Basically to do the console you need to remove the DS and PS side console trim (they slide up and back, held in by clips only) Then remove the back half of the console top trim with the cupholders, pops up, all clips again but be careful at the front as it is pretty flimsy. Then slide the shifter boot down, remove the spring clip, loose it forever somewhere in the car the pull the shift knob off. Remove the tiny plastic piece on DS near "P" and use something thin and long (most screwdrivers won't fit) to push down the interlock and put the shifter down in D for space. There is one screw at the front, then the shifter surround and ashtray lift up. There are 3 or 4 plugs underneath and it is off. Next is the rear cover of the centre console; you need to open the console lid, pop off the trim covering the lid hinge and undo the 2rd screw from the driver's side (the rest all need to come out later so you can do them all now and remove the lid) Then the rear cover unclips (6 clips), start at the top with a trim tool pulling backwards. Once it is off there are 2 screws facing rearwards to remove (need a short phillips for these) and you are done with the rear of the console. There are 4 plugs at the A/V box to unclip Then there are 2 screws at the front of the console, and 2 clips (pull up and back) and the console will come out.
×
×
  • Create New...