Jump to content
SAU Community

Tuning On An Inertia Dyno (not Braked)

180bfj20det

By 180bfj20det,
in Forced Induction Performance

 Share

Recommended Posts

180bfj20det Community Regular

180bfj20det

Posted
Posted

Hi,

I am located in France at the moment and unfortunately ALL dynos within a 500km radius of me are inertia dynos (not braked). I would like to have my car tuned (CA18DET 180sx) but can this be possible? This is the question I asked, and all 3 (yes only 3) shops with dynos say YES. They simply keep the engine on certain load points by using the car's brakes (as opposed to loading the dyno via eddy brakes etc which are found on braked dynos).

Frankly, they have me convinced!!!! Seeing the competition rally cars coming off these dynos and running so successfully and reliably, I have proof before my eyes that tuning all load points on an inertia dyno is accurate, viable and efficient (providing you have good rear brakes).

BUT....I have heard rumours that cars tuned on inertia dynos held on specific load points through the car's brakes run LEAN....I dont see how this could happen as really the concept is the same as road tuning except youre doing it in a safer manner.

I want to know people's opinions before I hand over 200 euros an hour for tuning on a dyno which may not give me the results i want....

Cheers

Link to comment
Share on other sites
DRFTR33 Contributor

DRFTR33

Posted
Posted

i have never seen a vehicle tuned on an inertia dyno but i dont see that it will cause you any problems as long as the person tuning your car know what they are doing

have you considered road tuning because it can be done anywere and the tuning is done in a real driving enviroment so in the end you can get a better running vehicle as long as the tuner knows what their doing

Link to comment
Share on other sites

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Darrel
      Theoretical Power Numbers

      By Darrel · Posted

      @Butters I can't tell you why but the bigger HKS step 2 cams improved low and mid end immensely. Turbos started spooling about 1k RPM less than before and the idle/vacuum was rock solid, it was an absolute thrill to drive, 3rd gear pulls hit 180kmh where previously only managed 160. Conversely, the milder poncoms in there now have a funky idle making it harder to get off the line, drives poorly in lower revs, laggy and makes less power/torque throughout. Feels better after I swapped the EBC but unless I put it on the Dyno again, I can't say how much better.
    • stasis
      Stagea Suspension

      By stasis · Posted

      Hi Sydney kid   do you still selling spring and blistein shocks for Nissan 260rs? Air any suspension upgrades? Please advice     yudy
    • Butters
      Theoretical Power Numbers

      By Butters · Posted

      Cams are not needed at this power level, they will create lag. The cam gears are a good idea though.
    • Darrel
      Theoretical Power Numbers

      By Darrel · Posted

      @Murray_Calavera yeah, I guessed as much, cooler temps, more boost, less knock, more timing, hello power. Unfortunately not quite within reach ATM, could upgrade my whole fuel system to support but still wouldn't have E85 to run it 😂  Anyway, I changed cams again, 260/260 poncam B and everything else the same except an EBC upgrade. Now I must say I was quite disappointed with the result as it was like running stock cams (didn't try to dial them in as they're supposed to be optimum already) but after awhile I suspected my new EBC was underperforming not to mention difficult to use. I recently swapped back my old EBC and it drives much better now, boost comes on sooner, more stable, no spikes etc, feels all quicker and faster than with stock cams. Planning to fiddle with the cam gears and see what happens but maybe skip the Dyno as I intend to revert to the HKS cams cos they really made the car come alive; low and mid end was unbelievable and it just wanted to rev to the moon, finally knew what people were raving about, RB26 really loves revs. Anyway, Dyno 03 is quite disappointing, in Dyno 02 although peak power was less and trailed off at the top, the low and mid end improvement more than made up for it.
    • Murray_Calavera
      Theoretical Power Numbers

      By Murray_Calavera · Posted

      @Darrel It's so tempting to say e85 is borderline magic. It cools the intake charge, so if you're flirting with the edge of the turbos compressor map it helps dramatically cool down the hot air the turbos are pumping. It is very resistant to detonation so you can crank the timing, I don't really want to say you won't be knock limited anymore.... but you probably wont be knock limited anymore lol. I wouldn't be surprised if you made 20% more power swapping to e85 (provided you have the fuel system to support them, bigger injectors maybe bigger pump etc). 
×
×
  • Create New...