Do you run premium or regular in your 1965 383 2 barels

[70bigblockdodge]

Well anyone coming to Carlisle you better fill up before Pa because we are straight up ethonol state, low, mid ,high if they tell you it is e-free it's a lie.

 

[BillGrissom]

For any gas today, change your rubber fuel hoses to "fuel injection" type (30R9, if I recall). The older "carburetor" fuel hose is still in stock at some auto parts, but most softens w/ ethanol. I ran into that in 1989 during a cross-country trip in our 1969 Dart. As we drove west, it began stumbling above 55 mph. I found the suction hose at the fuel pump was soft and collapsing. They must have just started adding ethanol then in the middle states. It also seemed to eat up the accel pump diaphragm in my Holley 1 bbl carb, since several times it leaked at that shaft and had to rebuild. One reason to avoid NOS carb kits. Re knocking, you need to adjust timing to the fuel. Modern engines since the 1990's do that via a knock sensor. I plan to retrofit to my 1965 Newport, using a 85-95 GM truck sensor/module, which my Holley Commander 950 fuel controller can use to adjust timing (8-pin GM HEI module).

 

[GG-1]

I run 100 LL Avgas in my '67 Imperial, my '73 Imperial when I still had it, my '79 300, my '72 MGB, my '77 Lotus and my '89 Lotus. Great stuff. Obviously you don't want to put it in anything with cat.
It's nothing more than good old fashioned leaded gas, 100 octane of course, tinted blue (like windshield washer fluid).
Even smells good when burning it. Oh, I also run it in my lawn equipment to towards the end of the year, that way everything starts in the spring.
As far as the road tax thing, the FAA gets the tax revenue as well as your states' DOT Aviation Branch. The money collected from the sales of aviation fuel goes into a big pot and is used for airport improvement projects, so don't feel guilty, believe me you're paying taxes.
It's not cheap however, $4.75 Here at my airport.

$4.75 seems cheap!
I just looked up the current price for 100 LL AVGAS at my local airport... it's $6.66 as of May 22, 2018
I'd like to try it in my '67 FURY 383 4bbl
This is at The Westchester County Airport, NY

Here's a site that lists the best, current deals by location/airports on AVGAS 100 LL nationwide:
AirNav: Great Deals on 100LL Avgas

I'll have to drive over an hour to an airport that gets me in the $4.50 per gallon range.

 

[78Brougham]

Location, location, location.... sorry to say, but Bill and Hillary are the root of your problem. You're in the high rent district because of them.

We just got a new load of 100LL at our airport. We're going to have to raise the price to $4.99 tomorrow. We had a fly in breakfast yesterday and we didn't want to discourage anyone from coming in.

 

[moper]

Wodering how many octane 1965 383 2-barels in my stock 300 need?

I run premium in everything these days. My daily, my truck, my mowers.... The low octane stuff is just horrid and all over the board as far as consistency and quality. So I use Shell or Mobil (with the corporate stickers on the pumps) and always go with high test.

 

[jct]

Top tier gas

 

[Russell Sullivan]

Funny story I heard from a fellow Mopar guy. He always got aircraft fuel for his stuff, but when he took his chainsaw to get rebuilt he brought a gallon of 93 octane pump gas (ethanol) and told the guy rebuilding the saw that he wanted it to run on that fuel. The guy asked how fresh it was, because if it was more than a few weeks old he should just use it to kill weeds because that's about all it was good for.

 

[Pete Kaczmarski]

If near a farming community try calling a Co-op. In Wisconsin Mills Fleet Farm offer non ethanol regular grade that is approx. 30-40 cents more than regular unleaded. Around here non ethanol premium is about 70 cents more than regular unleaded.

 

[Droptop 500]

Since I got my engine completely rebuilt all I use is 92 oct and when I get down to about 1/2 to 3/4 I fill up with some 110 oct and she runs real good

 

[rapidtrans]

Dad always ordered the 383 2bbl. in a c-body.
Those cars dragged a travel trailer and 7 people across the country and back. Through the mountains, across the deserts and down the PCH without pinging. Even on Gultane. Probably the lowest, meaning cheapest, gas available then. The low perf. 4bbl cars like NYs and Imps really pinged when put the low octane stuff in it.

Nowadays I’ve found the ethanol is a bigger issue than octane. E free fuel around here difficult to findat the pump. Premium and regular seem to run the same in my 383 4bbl. Best performance I’ve found is with any octane BP fuels.