[Marlinman]

Decided to try and add some octane booster at my last fill up with 93 octane. I have been running 16 PSI on my stage 2 set up with stock fueling for a while now and no issues (straight 93 usually).
It was a little hot but nothing abnormal. I get on it maybe 20 minutes after driving and throw super knock codes at WOT with injection shutdown on two cylinders.

Can anyone lend insight as to whether the octane booster could have precipitated such an event?

The other consideration is that it was coincidental with some other cause. I've got 92K miles on the car. Coils and plugs are only 7K old, however I am running original HPFP and injectors. I suppose if there is an issue with fuel distribution I could have had a pre-ignition event for my boost demands.

[FastF30]

Originally Posted by Marlinman

The other consideration is that it was coincidental with some other cause. I've got 92K miles on the car. Coils and plugs are only 7K old, however I am running original HPFP and injectors. I suppose if there is an issue with fuel distribution I could have had a pre-ignition event for my boost demands.

My money is on the coincidental.... if anything the higher octane would of prevented detonation since your basically running on a 93 tune...

[Jimi1121]

octane booster is completely useless. Try to get some MS109 and toss in there. Early 2000's use to mix toluene with pump gas to make our own race gas

[Marlinman]

Yea I won't be using that again.

[Mouse]

Originally Posted by Jimi1121

octane booster is completely useless. Try to get some MS109 and toss in there. Early 2000's use to mix toluene with pump gas to make our own race gas

Agreed. I used Torco a bit but hated how it left my plugs. Off the shelf boosters are useless IMO.

[Jimi1121]

Originally Posted by Marlinman

Yea I won't be using that again.

Look at the bottle.. doesnt even add a point of octane

[Pray for Mojo]

Depends what octane boost you use. Boostane, Torco, VP Octanium, and Royal Purple seem to work, with Boostane being the best. The off the shelf garbage at your local gas station doesn't. I personally think race gas is overpriced compared to pump with a can of boostane.

[FastF30]

Originally Posted by Pray for Mojo

I personally think race gas is overpriced compared to pump with a can of boostane.

Boostane is $16 for 16ozs on Amazon... how many points does it raise the octane.... I hope at least enough to run E85map on a tune if I'm using 93octane... If so I'll probably try a can...

it takes 4.0 gallons of E85 if you have 93octane to begin with to get to 30% (96octane) to use E85map on MHD based on 15.8 gallon fuel tank ... Just found a place that sells E85 and it's only 20 minutes away! well until traffic hits.... I called and at this moment don't know how much it costs...

Update: Holy Moly!!!! Found the mixing chart .... One can of Boostane will raise octane of 93 octane to 100octane!!!!! ..... I'm totally in on this.... ease of Amazon Prime and no traffic and basically cheaper than E85 ounce/octane a gallon

[akgambino]

Originally Posted by Marlinman

Decided to try and add some octane booster at my last fill up with 93 octane. I have been running 16 PSI on my stage 2 set up with stock fueling for a while now and no issues (straight 93 usually).
It was a little hot but nothing abnormal. I get on it maybe 20 minutes after driving and throw super knock codes at WOT with injection shutdown on two cylinders.

Can anyone lend insight as to whether the octane booster could have precipitated such an event?

The other consideration is that it was coincidental with some other cause. I've got 92K miles on the car. Coils and plugs are only 7K old, however I am running original HPFP and injectors. I suppose if there is an issue with fuel distribution I could have had a pre-ignition event for my boost demands.

I had this happen a few times and tried to solve it with octane booster on ots stage 2 91 octane pwg because I was told it was only one thing that could cause it.... lack of octane. Lol.

In my case it was not octane related but 100% tune related. My car is 335i xdrive 2013 6mt and a custom tune solved this problem literally on the first revision from my tuner.

Is your car auto or 6mt?

[Marlinman]

Originally Posted by akgambino

I had this happen a few times and tried to solve it with octane booster on ots stage 2 91 octane pwg because I was told it was only one thing that could cause it.... lack of octane. Lol.

In my case it was not octane related but 100% tune related. My car is 335i xdrive 2013 6mt and a custom tune solved this problem literally on the first revision from my tuner.

Is your car auto or 6mt?

Wow that is good news, only I've been running the same tune for a while with no issues. I'm guessing it also could have been the ambient temps which were about 98 degrees outside. I'm auto. I just didn't understand it. I wondered if my HPFP or injectors were about to fail or there was some carbon build up that somehow got knocked off and pre-ignited. What custom tune did you go with.

[akgambino]

Originally Posted by Marlinman

Wow that is good news, only I've been running the same tune for a while with no issues. I'm guessing it also could have been the ambient temps which were about 98 degrees outside. I'm auto. I just didn't understand it. I wondered if my HPFP or injectors were about to fail or there was some carbon build up that somehow got knocked off and pre-ignited. What custom tune did you go with.

If you aren't 6mt and never had other issues on ots tune then maybe custom tune won't help u in this case. I had low rpm shudders under part throttle on ots the tune was calling for a crazy high load target with part throttle application and severely pulling timing.

[FastF30]

So I calculated this all out... Wow... In order to use the E85 map on MHD you need basically 96 octane... using the mixing chart from Boostane.... I went with 97 octane to be safe... equals just 4 ounces of Boostane Premium mix... which equals $4 extra a full tank fill-up.... now that is cheap and easy to do especially with Amazon Prime... Now your beating stock M3's....

But come to think of it... your not getting the same cooling as with an ethanol blend... so I'm wondering how well it will work out...

[bradsm87]

What tune?

[Marlinman]

jb4 with MHD backend flash
targeting 17 PSI up top tapered to 15

[akgambino]

Originally Posted by Marlinman

jb4 with MHD backend flash
targeting 17 PSI up top tapered to 15

Your pwg tapers to 15psi at the manifold near redline (I assume that's what you mean by up top)??? Ummmm..... ya right. Maybe you are looking at target boost.

[bradsm87]

Originally Posted by Marlinman

jb4 with MHD backend flash
targeting 17 PSI up top tapered to 15

I'd just target a bit less boost, do plenty of logs and add reduce timing if needed in any areas of multiple timing corrections. Better still, just get rid of the JB4 for proper logging etc.

[Marlinman]

Originally Posted by akgambino

Your pwg tapers to 15psi at the manifold near redline (I assume that's what you mean by up top)??? Ummmm..... ya right. Maybe you are looking at target boost.

Yes, read the sentence. Those are the numbers I target.

[Marlinman]

Originally Posted by bradsm87

I'd just target a bit less boost, do plenty of logs and add reduce timing if needed in any areas of multiple timing corrections. Better still, just get rid of the JB4 for proper logging etc.

Working on it....would like to go full flash soon. I've reduced to Map1 for now, targets 14 PSI across the board and car is doing fine. I think it was a coincidence of an overly aggressive tune and a hot day!

[tsiconquest88]

I seen this post and inclined to add to this, i was ok stage 1+ stock plugs ngk brand, i switched to 1 step colder ngk and 2 drives or so after although other day seemed to be ok i got superknock code for cyl 5. I think the step colder plugs arent the best choice. I switched back to stock ngk see what happens tomorrow or so.

[1bad14-F30]

1.28oz per gal. 20oz per 16 gal tank = 100 octane

Yes orange plugs and inside of exhaust tips. WGAF. Orange instead of Black. So what. Bought 5 gal. should net about 7000 miles of pure fun!

[1bad14-F30]

Originally Posted by FastF30

But come to think of it... your not getting the same cooling as with an ethanol blend... so I'm wondering how well it will work out...

True on the cooling, but Ethanol has less energy than Gasoline. Raise the octane (with Boostane Professional) with Ethanol free gas and get more energy. I have been running this for 2 months daily now. (Every since I had the VRSF Muffler Delete installed) Very happy with how it performs and the engine temps. Still need to run logs, but I am seeing 18.5 to 19 psi hot and 19 to 20psi when cooler out.

Also don't have to deal with all the fueling upgrades required to run E30 and above. LPFP, HPFP, etc. Yeah, E85 may net a few more HP. Not worth it for me at this point in time. When I upgrade the turbo and go to forged internals? Maybe.