Octane boosters

[corvettedad]

I found a thread on here but it was from 2008, what's your thoughts or experiences. There seems to be about 8 top products. I've got my old school 68 Nova with a 355ci 11/1 compression, 4-speed, 4.88 gear combo. I've always just bought VP 104 but now looking at alternatives besides AV gas. Comments.

[Monster]

Is this change financial based or for convenience?

[corvettedad]

Both, where I live there's not a lot of choices other than pump gas, and being a cast iron head it doesn't like it. Just don't want to order a drum of VP

[Dan Barlow]

Sounds like you need a alcohol carb.

[oletrux4evr]

I like to mix in a little Avgas. Makes the car smell like a Cessna.

[James_Stainbrook]

If you're looking for alternatives to AV gas, you can consider unleaded fuels like pump gasoline (87 octane), high-octane racing fuels (such as Sunoco Supreme, VP Race Fuel C16, etc.), or E85 (85% ethanol, 15% gasoline). However, it's important to note that not all fuels are suitable for all engines, and the fuel that works best for your engine depends on its compression ratio, ignition timing, and other factors.

[BangShiftChad]

Both, where I live there's not a lot of choices other than pump gas, and being a cast iron head it doesn't like it. Just don't want to order a drum of VP

Define "doesn't like it". Give me some more details on this thing. What's the camshaft like? The cast iron head definitely isn't as good as an aluminum head at that compression, but with a stick and 4.88 gears that thing should have zero issue with detonation. Detonation doesn't happen, in a naturally aspirated combination, when rpm goes up because there physically isn't enough time for it to happen. And in that kind of combination you should have enough camshaft in it to bleed off low rpm cylinder pressure. With that said, I have some octane booster suggestions based on stuff I've used. I've used both Race Gas brand and 104+. I know lots of people who use Boostane and love it and I've known folks that use Amsoil Octane booster too. I've used Race Gas most recently and it worked well for what we were doing which was on the chassis dyno with a naturally aspirated late model truck.