I read on page 100 (from 2006 postings) or what so ever that if I put 100 octane in my srt-6 the car will not take full advantage of the 100 octane, is this true? If so what will I need to mod to take full advantage of it and what are the estimated costs? The reasoning being for asking is that I was reading about people using e85 and not discussing about not getting the full potential of the 105 octane.

Thanks,
Nick

 

I tried 5-gal of Q-16 mixed with about 1/4 tank of 93. Used my laptop and reset the computer. Ran at the track for 2 days and say ZERO improvement for the $75 of Q-16... Unless you are tuned to fun race fuel, you (in theory) should not see any gain.

 

I run my N/A on Shell V-Power which is 99RON straight from the pumps. Its about 5p/litre more expensive than Regular which is 95RON over here.

Living in the UK does have some advantages.

 

UK rates fuel in RON. USA uses RON+MON/2 or simply AKI.
UK RON 95 = USA 91 "octane"
UK RON 99 = USA 93-94 (Super Unleaded)

With that said. Unless you are getting knocking, no sence in running a higher octane fuel than what you are tuned for. If you have no mods and the car calls for 91... than that's what its designed to run on.

I'm sure there are a lot of other opinions on this topic, but hopefully Eurocharged will chime in with thier Tuning experience.

 

Why? Does your car Knock? Do you have high compression pistons?

 

Not sure who that question was directed at...

But I have no knocking. I'm tuned for my mods and 93 AKI.

 

Not you sorry.. the OP. (slow typer)

 

There are four stations in my area that offer 100 octane at the pump. about $6 and change per gallon. Cheaper when compared to the 5 gallon pail price at a fuel store

Unless you race - there will probably be minimal gains to offset the higher costs.

The knock sensors in our cars will signal the ECU when pre-detonation occurs, the ECU in turn pulls the timing back to avoid knock. In theory, our engines should never knock, just lose power. (Unless you got really bad gasoline)

The higher the octane rating, the less likely the engine will knock (when performance driving) - and thus, the ECU won't pull timing - thus providing you maximum performance....

 

Sorry for the slow respnding, no knocking with the car whatsoever. Just curious as if my ecu would actually take full benefit of the 100 octane. I currently run 93, but should i run 91?
I like to sprint around in the streets. Thanks so much for the responses so far.

>Nick

 

waste of money unless your modified and on the track.

on the track i consistently trap 2+mph faster with 93 octane plus 2oz per gallon of klotz octane booster to make 98 octane.

 

yup, not worth it unless your tuned for it....

 

Would it be any use to put 87 plus klotz? Not that I would not just put 91 but I am just a curious person.

 

why? it would be cheaper to just use 91 octane.

 

With a stock tune it gives you an extra margin of safety, but the stock ecu is tuned so conservatively that you really shouldnt need it, unless you have a long modification list on a stock tune

 

i have been told by a reputable tuner that (for some reason i dont remember, probably because i didnt understand it) the car can only utilize up to 95 or so octane and see a gain in power. after that, you need to tune to see gains with above 95 octane.

 

Thanks for all the input,
much thanks!

>Nick