100 Octane stations in CA

[swifttal]

Originally Posted by LSxJunkie

Read post number 4. The OP was talking about stock motors, as were half the people who replied.



Yes, it makes a difference in cars that are rated for higher octane. What's your point? GM tunes the LS3 for 91 and lets the knock retard pull timing for idiots who put 89 or 87 in the car. Obviously they'll dyno lower. STILL doesn't mean it's going to run better on 100.

My point was clear, what's to argue about

[GrnMchin]

Originally Posted by LSxJunkie

Read post number 4. The OP was talking about stock motors, as were half the people who replied.



Yes, it makes a difference in cars that are rated for higher octane. What's your point? GM tunes the LS3 for 91 and lets the knock retard pull timing for idiots who put 89 or 87 in the car. Obviously they'll dyno lower. STILL doesn't mean it's going to run better on 100.

The other half talked about upgrades that could be done to help use the 100 Octane ie timing.

[stovt001]

To Sum Up:

Higher octane allows more aggressive timing/tune creating more power.

All agreed?

[TLSTWIN]

Originally Posted by stovt001

To Sum Up:

Higher octane allows more aggressive timing/tune creating more power.

All agreed?

So unless you are doing this, it is pointless to run higher octane?

I know I NEVER use anything more than 87 octane in my bike when I go to the track (not strip).

I know we have always said amongs our selves, that unless you are "pinging" "detonating", there is a reason to go to the higher octane.

[GrnMchin]

Agreed

[ShnOmac]

Wont the "brain's" of the operation sense the higher octane and and adjust timing accordingly??

[CamaroSpike23]

Originally Posted by TLSTWIN

So unless you are doing this, it is pointless to run higher octane?

I know I NEVER use anything more than 87 octane in my bike when I go to the track (not strip).

I know we have always said amongs our selves, that unless you are "pinging" "detonating", there is a reason to go to the higher octane.

the only thing is, then if you are at the track and start pinging with half a tank. then again, if ur like me and have an LT1, you run 91 or higher all the time regardless

Originally Posted by shnomac77

Wont the "brain's" of the operation sense the higher octane and and adjust timing accordingly??

it doesnt sense higher octane, it just makes repeated calculations based on info from the sensors on the car and start increasing the spark advance till it gets knock, then pulls it back.

my LT1 scanmaster has a setting to show my spark advance and retard, and im usually around 44-47 deg advance.

[camaro5]

Originally Posted by CamaroSpike23

the only thing is, then if you are at the track and start pinging with half a tank. then again, if ur like me and have an LT1, you run 91 or higher all the time regardless



it doesnt sense higher octane, it just makes repeated calculations based on info from the sensors on the car and start increasing the spark advance till it gets knock, then pulls it back.

my LT1 scanmaster has a setting to show my spark advance and retard, and im usually around 44-47 deg advance.

^ Motorhead Alert!

Spike, just throw some 101 Octane boost in the tank, and hold on!

It's interesting to note, that detonation, "ping", is caused by the explosion of combustion occurring too fast when the piston is still rising in the cylinder to TDC.

Lower octane fuel is actually MORE volatile than higher octane fuel. It burns faster.

Therefore, when we use higher octane fuel, the combustion burn is slower and does not bang down on the rising piston, which is what makes that "ping" sound.



The way ESC (electronic spark control) functions, is it places a piezo-electric microphone on or near the engine block.

This microphone controls feedback 5-volt current. The louder the detonation, the more voltage it sends back to the PCM.

The PCM has parameters burned into NVRAM, that include a complex algorithm of microphone voltage and the correlating reduction or increase in spark timing advance.

The PCM constantly pushes the timing as far as possible with just a little bit of detonation which s the preferred characteristic.



101 Octane Boost or high octane gas allows the PCM to push more timing, and create more horsepower, and efficiency.

It has been shown on Corvette Forum, that premium fuel pays for itself, by providing higher efficiency engine operation, increasing MPG significantly.

[CamaroSpike23]

Originally Posted by camaro5

^ Motorhead Alert!

Spike, just throw some 101 Octane boost in the tank, and hold on!

yeah... cus that shit works worth a damn....



ill post up some research on octane boosters tomorrow

[camaro5]

Originally Posted by CamaroSpike23

yeah... cus that shit works worth a damn....



ill post up some research on octane boosters tomorrow

She worky on new Corvette! SOP was wow!

I used it years ago in my Z28 too. SOP, says WEE!

You're probably saying it's not as effective as real, high-octane gas, and I believe that.

Your research is appreciated.

[ShnOmac]

Lucas makes a good octane booster.... its actually not street legal but it works!

[andyrew]

Just to clear up my posts,

Yes I run a separate tune specifically for the 100 octane file, increasing timing, and also increasing boost pressures.

However I agree that to make optimum power you want to run the least octane without detonation, as it ignites easier.

[swifttal]

Originally Posted by andyrew

Just to clear up my posts,

Yes I run a separate tune specifically for the 100 octane file, increasing timing, and also increasing boost pressures.

However I agree that to make optimum power you want to run the least octane without detonation, as it ignites easier.

which is why formula one and nascar use 87 right? What...no that's right, they use 100+ octane, my bad

Edit: I know this is a highly controversial subject, but the selling point for me is racing. Everyone in the business of making horsepower uses higher octane fuels. These people spend millions upon millions of dollars in research getting this right. That's my selling point. Much like the conventional oil vs synthetic argument. I didn't believe the hype until formula one finally started using synthetic. Change over the day after they did, because with this heavy of a machine running in the business of making the highest, most reliable horsepower, their word (or example in this case) speaks louder than anything. Won't catch me putting anything lower that manufacturer's recommendation at the minimum, and if I want HP, I crank up the octane - if it's good for multimillion dollar race cars, it's good enough for me.

[andyrew]

Originally Posted by swifttal

which is why formula one and nascar use 87 right? What...no that's right, they use 100+ octane, my bad

Edit: I know this is a highly controversial subject, but the selling point for me is racing. Everyone in the business of making horsepower uses higher octane fuels. These people spend millions upon millions of dollars in research getting this right. That's my selling point. Much like the conventional oil vs synthetic argument. I didn't believe the hype until formula one finally started using synthetic. Change over the day after they did, because with this heavy of a machine running in the business of making the highest, most reliable horsepower, their word (or example in this case) speaks louder than anything. Won't catch me putting anything lower that manufacturer's recommendation at the minimum, and if I want HP, I crank up the octane - if it's good for multimillion dollar race cars, it's good enough for me.

You know they run that octane because they are tuned for it, right? If they were tuned for 87, and 100 octane they would have slightly less power....

right?