Ob1 vs 247 SOB vs nf ultra whats best?

[bmw335ie90]

Hi i want to use one of the 3 octane boosters.
Nf ultra (least keen on it heard it leaves residue on plugs)
247 race fuel synthetic octane booster.
Or Ob1 (my nr one choice atm)

I want to run a 95octane 102 ron map
On mhd with a e15 blend.

Which one is best and why?
And also what blend ob1 or 247 must i make to get 102 -103 ron. So i can run a 95octane 102 ron map safely?
Going to add e15-e20 for safety and benefit of running cooler.

I know water meth raises octane so will that be the solution rather than using octane boosters?

Lastly how much faster will stage 2+ 95octane map be vs stage 2+ 91 octane on mhd.

Thanks guys

 

[bmw335ie90]

Anyone? :fencelook:

 

[" N1KHAR-ZN "]

I've used NF as well as OB1 fuels.. Similar results but prefer OB1 because it is known to be less harsh on plugs. OB1 is cheaper as well

I'm no expert but I recall reading that it's not recommended to use additives or ethanol to bump up your octane rating to use a 102ron map. The reasoning is that the map is designed for 102 unleaded fuel which burns ideally in a 14.7:1 ratio with air. This map will target around that AFR mostly. Now ethanol and other chemicals don't burn ideally at that AFR.. The ideal ratio for ethanol is lower than this IIRC. This is why fuel pressure drops with too much ethanol content.
Why not create 25% ethanol mix with 95ron and try the E25 map?

Water meth should be considered for cooling only..





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[Twinz]

You can google my meth threads and ethanol threads on this board and there are threads on octane booster testing i did somewhere. Only problem is photobucket may have blocked the pix :rage:

In short from your list i would start with the 24/7 synthetic product.
Mix the 5Liters 24/7 with 20liters pump...then log. Your logs will indicate how the fuel mix is performing....24/7 will clean up timing nicely and bump boost. But log & log and log some more when you start experimenting with fuel.