Power gain going from 93 to 100 octane
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Power gain going from 93 to 100 octane The local FS station sells turbo blue 100 octane (unleaded). I am wondering what kind of power/boost gains I could see on my setup (stock 10:1 compression) versus using 93 octane. I have seen a lot of guys make real good power with 110+ octane, but not much with 100 octane.
it will only help you not detonate if you are already detonating. Unless you increase boost or timing, no power gains will be made.
The reason you run higher octane is to increase timing/boost. by running the higher octane, it allows you to create more pressure without pinging (up to a certain point).
The reason you run higher octane is to increase timing/boost. by running the higher octane, it allows you to create more pressure without pinging (up to a certain point).
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Originally Posted by 2000 Tran Zam
it will only help you not detonate if you are already detonating. Unless you increase boost or timing, no power gains will be made.
The reason you run higher octane is to increase timing/boost. by running the higher octane, it allows you to create more pressure without pinging (up to a certain point).
The reason you run higher octane is to increase timing/boost. by running the higher octane, it allows you to create more pressure without pinging (up to a certain point).
Also, would 10 psi be doable on 100 octane?
harlan ran 10pis on a stock motor/incon car a long ago with race gas but i do not know what octane....put the 100 in and slowly easy up the boost and see if you get any knock.
Originally Posted by bowtieman81
Also, would 10 psi be doable on 100 octane?
Make sense?
Fill her up with the 100 octane. Then slowly up the boost and change the timing. Monitor your KR and when you start to see some back it down a little to keep it safe. Not exactly the safest way to do things, but it works. The power gains would hard to estimate, but it will be a very noticable gain.
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Originally Posted by 2000 Tran Zam
well just to give you an idea, look at my sig between the differences in power/boost and octane.
pump gas i ran 13.5 lbs, around 16.5 lbs or so i think on 101 oct.
pump gas i ran 13.5 lbs, around 16.5 lbs or so i think on 101 oct.
So me being a stock engine I could probably expect a 50-60 rwhp gain
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Originally Posted by bowtieman81
Now that is what I was looking for. Basically you picked up 100 rwhp by going to 101 octane, and upping the boost/timing.
So me being a stock engine I could probably expect a 50-60 rwhp gain
So me being a stock engine I could probably expect a 50-60 rwhp gain
Im not sure if it was the pistons or connecting rods that let go at around that power, but even with a safe/conservative tune your running on borrowed time.
I would say for comfort sake, dont go past 550 rwhp for an all the time tune.
JMO
Edit: i see your running a t76...
you dont need to run too much boost with that turbo to get decent numbers. If your on the stock motor, expect your heads to be the least efficient.
but at 10:1 or higher CR, i wouldnt run more then 4-6 lbs on pump gas, with conservative timing too.
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Originally Posted by Beaflag VonRathburg
Around those numbers the ringlands on the pistons start to go.
I am shooting for about 525 rwhp, and safely. I figure I can get 475 rwhp out of my setup on 93 octane safely, so I am hoping with 100 octane it will make about 525-530 safely.
I'm not sure of the exact number area of where the ringlands start to go. Some could go out on yours at 450hp and someone elses could go out a 650hp. Every car is different. That's why getting the tune spot on is so important if you're trying to push the limits or just wanting a reliable fast DD.
It doesn't matter what gas you have in your car, your ringlands/stock pistons/rod bolts are the weakest link. keep power conservative until you can afford a forged block. its not worth risking damage to your block trying to push out a higher number with a ticking time bomb
