Hacker News Reader

Comment by legitster | Hacker News Reader

> suitable replacements that provide the same benefits

Eh. It's basically impossible to get past 105 octane on unleaded fuel. Whereas leaded fuels could get you up to 118.

Obviously modern sports cars are designed with much lower compression ratios in mind. But if you are showing off historic engine designs, some of them won't even run without leaded fuels.

View on HN

No I'm not talking about street cars I'm talking about track only race cars. There is absolutely replacements for this that do not contain lead. Here is only one example.

https://www.epartrade.com/product/2f2ee087-highest-octane-un...

Yes, I understand. But most of the events that PIR runs are using street cars or modern racing series that use lower octane fuels.

But there are also certain events where people are absolutely bringing out 40-50 year old drag racers.

I don't believe that particular product you have linked to has been on the market for over a decade. I suspect the additives they used in place of lead were probably even worse. If you can find an unleaded racing fuel above 110 octane for sale today I will happily eat my words.

Ignite Red is 114 octane E90 blend... unleaded...

The product I linked is 116 octane and is unleaded and does not contain ethanol. I am not exactly sure how long it's been on the market but doing a simple search I can find people referencing it all the way back to 2017.

So at this point even for super high octane needs there is no requirement for running a leaded gasoline anymore and hasn't been for some time.

Reply on news.ycombinator.com