Jump to content
SAU Community

Octane Booster Results

Johnny

By Johnny,
in Engines & Forced Induction

 Share

Recommended Posts

and3_3 Proficient

and3_3

Posted
Posted

I am using octane booster atm as my car was somehow tuned on 100 octane petrol and i can only get 98 octane petrol.

When I get some money and a tuner i will retune for 98 octane and everything will be sweet.

On my current tank and first tank of using octane booster knock hasn't been over 20 using 12psi, used hit 45ish.

Johnny Veteran

Johnny

Posted
  • Author
Posted
I am using octane booster atm as my car was somehow tuned on 100 octane petrol and i can only get 98 octane petrol.

When I get some money and a tuner i will retune for 98 octane and everything will be sweet.

On my current tank and first tank of using octane booster knock hasn't been over 20 using 12psi, used hit 45ish.

Sucks that shell got rid of their vpower racing huh.

I will buy a bottle to try out, you gave me a good idea about watching the knocks. Mine seems to reach about 15-25 but im not sure if its just engine noise or not but i will add the booster and see if it reduces down.

Alot of people think it dosent work but its worth a try at like 20ish bucks. Plus the website did a test and it seemed pretty worthwhile.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

erm, 15-25 is perfectly normal and acceptable.

You simple wont get it any lower.

If your using octane booster to try and lower the knock below 25 then you wont ever achieve that.

Under 35 is TOTALLY fine.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Not sure, but i tell you now it wont be 5.

Lower the better yes, but the fact of the matter is you will NEVER get it below 15-25, thats where the sensor sits on a well tuned car.

I see 30-35 on occasion, no harm at all

Johnny Veteran

Johnny

Posted
  • Author
Posted
What do stock ecu's usually run knock at? I would have thought under 5 always on 91 octane or something really low to prolong the engine.

The lower the better i say.

Is it because the stock ecu reduces timing to decrease the knock? Im a very paranoid person so because my power fc dosent have the ability to reduce timing im always afraid to give it the beans.

Im in process of booking in another dyno tune at CREATD motorsports as im getting my new version 6 hks evc installed and i will ask them to get the knocks as low as possible.

Is it possible that my 15-25 ish 'knocks' are just other engine noises picked up by the microphones? I wonder!

VB- Veteran

VB-

Posted
Posted

yes, entirely possible that its other noise picked up by the sensor, some people say that general road noises can be responsible for like a knock reading of 15 or so. cant tell you how much to expect in skylines etc though, most issues i've heard of are in older cars with rattly top ends

The Mafia Grand Master

The Mafia

Posted
Posted
Not sure, but i tell you now it wont be 5.

Lower the better yes, but the fact of the matter is you will NEVER get it below 15-25, thats where the sensor sits on a well tuned car.

I see 30-35 on occasion, no harm at all

I've heard loud pinging at 38 knock on the hand controller...

Don't always believe what you see

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

^^ Faulty knock sensor perhaps if its only popping 38

I couldnt hear an ounce of pinging and my car is as quiet as its gonna get these days.

Obviously might be able to hear more with ears etc, but that remains to be seen

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

    • Murray_Calavera
      Quieter performance exhausts (or muffler add-on options)

      By Murray_Calavera · Posted

      Nope.    Grab a varex and turn it down as you get close to home, win win? 
    • f00stx
      Quieter performance exhausts (or muffler add-on options)

      By f00stx · Posted

      So, I've had my V36 for about a month now and have already copped an "excessive exhaust noise" notification from QLD TMR, reported by someone in my local area. It's a twin as per the original, and can have a bit of a throaty note to it when idling cold 😄 and if I do get up it a bit, it can be noisy, but it did pass a roadworthy inspection before sale, so.... ... but in the interest of being a good neighbour, I do want to quieten it down a bit. Is anyone here running a quiet aftermarket cat-back on their V36 or 370Z? And the big, bold question: does an aftermarket cat-back really make much of a performance difference on these cars?
    • GTSBoy
      New kid on the block

      By GTSBoy · Posted

      The wiring diagram for the R33 RB25 is freely available, and is essentially the same same as most other RBs (just with differences as to which pin # does which job). To get the ECU to power up, you just need to provide power to the ECCS relay, and have the other power feeds that come in from the top left of the wiring diagram (wrt the ECU) that give perma power to the fuel pump relay, the ECU itself, etc etc, all connected. When you put power on all these it will just come to life. It's pretty clear from the diagram what needs to happen. Just follow the lines from the 12V + supply stuff in the top left over towards the ECU. I've even posted snips of such diagrams (not for vanilla 25, I think for Neo and 26) to various threads here in the last few months, talking about what it takes to get the fuel pump and FPCM up and going. Search these up and they will help get you started on doing the same with the vanilla 25 diagram. Hell, for all I know, I've done the same with that one in years past and have forgotten.
    • Duncan
      New kid on the block

      By Duncan · Posted

      Yep...so unless someone posts up the answer you will need to probe from the ECU connector to the dash plug with a multi meter in continuity mode to trace the wires.  Note the ECU has multiple - and + (and across different key settings - Battery, IGN and Start) and most likely the power is fed from the connector(s) that is normally near the left hand headlight.
    • Songo
      New kid on the block

      By Songo · Posted

      Thanks Duncan, I am actually just trying to get the Rb turning and running with the RB25DET S2 original loom itself  I am just trying to get it going outside the body and not thinking about the S15 or trying to match anything to the S15 loom at all I am only trying to see if anyone has done this and what pin they found to be the ignition trigger and ECU+/- on the dash connector, that's about it. Thanks  
×
×
  • Create New...