Fuel
Dr. Detroit
Joined: Mar 2012
Posts: 10,093
Likes: 4,019
From: New Braunfels Texas
The 390 should run on Pump 93 if the curve isn't too aggressive and timing not too far advanced.....
Some will tell you to run lead additive but it takes tens and thousands of miles to beat the non-hardened seats in......
I ran my 427/400 on pump 93 with 37 degrees total timing and about 16 initial......it was fine but WOT in 4th at 50-60 mph you could hear a little spark knock.....
Jebby
Some will tell you to run lead additive but it takes tens and thousands of miles to beat the non-hardened seats in......
I ran my 427/400 on pump 93 with 37 degrees total timing and about 16 initial......it was fine but WOT in 4th at 50-60 mph you could hear a little spark knock.....
Jebby
Pro
Joined: Aug 2000
Posts: 610
Likes: 167
From: Vancouver B.C.
Try to avoid gas with ethanol. Creates problems with some fuel parts, and if your car sits in storage for an extended period, gas with ethanol goes bad quickly. Also, as mentioned use higher octane fuel.
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
As mentioned, if the car sits a lot, avoid ethanol gas. Here's station's that sell non-ethanol gas. Be aware there are different octanes with this type gas also.
https://www.pure-gas.org/
https://www.pure-gas.org/
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