Notices
1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

flathead gas

Thread Tools
 
Search this Thread
 
Old May 28, 2003 | 07:32 AM
  #1  
ddurant's Avatar
ddurant
Thread Starter
|
Senior User
Joined: Mar 2003
Posts: 197
Likes: 0
From: Richmond VA
flathead gas

do you guys use a gas additive for the unleaded gas. i have a 49 flathead.
 
Reply
Old May 28, 2003 | 08:28 AM
  #2  
286merc's Avatar
286merc
Posting Guru
20 Year Member
Joined: Jul 2001
Posts: 2,119
Likes: 2
From: Southern New Hampshire
flathead gas

Flats thru late 50 have hardened valve seats, they run fine on todays crap. All flats have stainless exhaust valves also.
 
Reply
Old May 28, 2003 | 08:35 AM
  #3  
ddurant's Avatar
ddurant
Thread Starter
|
Senior User
Joined: Mar 2003
Posts: 197
Likes: 0
From: Richmond VA
flathead gas

thanks Carl

i didn't know they had hardened seats that far back. should i use 93 oct. or 87
 
Reply
Old May 28, 2003 | 09:05 AM
  #4  
286merc's Avatar
286merc
Posting Guru
20 Year Member
Joined: Jul 2001
Posts: 2,119
Likes: 2
From: Southern New Hampshire
flathead gas

Ford had hardened seats in the 40's Dale, maybe even earlier.
As long as the compression hasnt changed much due to head milling, bore or carbon, then 87 octane is fine. Set the timing and give it a run, flattys do not like retarted or advanced ignitions, both cause hot running.
 
Reply
Old May 28, 2003 | 09:07 AM
  #5  
ddurant's Avatar
ddurant
Thread Starter
|
Senior User
Joined: Mar 2003
Posts: 197
Likes: 0
From: Richmond VA
flathead gas

great info
 
Reply
Old May 29, 2003 | 05:40 PM
  #6  
j gibbs's Avatar
j gibbs
Senior User
Joined: Mar 2003
Posts: 274
Likes: 0
From: SW Wyoming
flathead gas

That's great info!

I have a '50 with the flathead 6 we rebuilt about 10 years ago. I haven't driven it for 7 years except on and off a trailer once. When I drove it in High School I could still by regular (that's regular with lead not regular unleaded). I have been a little worried that I should be buying additive or get hardened seats for it. Now I just need to fix the brakes and about 10 other and get it registered to be back on the road.
 
Reply




All times are GMT -5. The time now is 07:06 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE