Notices
1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
Sponsored by:
Sponsored by: Moser

302 max bore

Thread Tools
 
Search this Thread
 
Old Jul 10, 2025 | 05:02 PM
  #1  
Old Guy F-250's Avatar
Old Guy F-250
Thread Starter
|
Laughing Gas
5 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2020
Posts: 821
Likes: 292
From: Pelham Alabama
302 max bore

Just curious as to the max a 86 302 can be bored.
Found a nice engine but has been bored ,040

Any thoughts
Thank you
Alex
 
Reply
Old Jul 10, 2025 | 06:41 PM
  #2  
52 Merc's Avatar
52 Merc
Hotshot
15 Year Member
Liked
Community Favorite
Top Answer: 3
Joined: Oct 2009
Posts: 16,192
Likes: 4,801
From: Burbank, WA
That's about .010 past the recommended max, but you might get away with it. Being a later block it may be even thinner than the early blocks, which many back then had problems going .040. You could have it sonic checked ($$$), but personally, I'd hold out for a better one.
 
Reply
Old Jul 10, 2025 | 10:59 PM
  #3  
85e150's Avatar
85e150
Super Moderator
20 Year Member
Community Builder
Liked
Community Favorite
Joined: Apr 2004
Posts: 34,517
Likes: 2,826
Club FTE Gold Member
How many miles on it at .040?

is it a recent rebuild that the guy just doesn't want? Or an older one that's half or more worn out? Or a recent one that overheats?
 
Reply
Old Jul 11, 2025 | 08:06 AM
  #4  
atitagain4's Avatar
atitagain4
Tuned
Photogenic
Liked
Loved
Community Favorite
Joined: Aug 2024
Posts: 406
Likes: 248
.040 is the comfortable max.
 
Reply
Old Jul 11, 2025 | 10:02 AM
  #5  
Old Guy F-250's Avatar
Old Guy F-250
Thread Starter
|
Laughing Gas
5 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2020
Posts: 821
Likes: 292
From: Pelham Alabama
Originally Posted by 85e150
How many miles on it at .040?

is it a recent rebuild that the guy just doesn't want? Or an older one that's half or more worn out? Or a recent one that overheats?
well,, GUY SAID he was building the engine for his 77 100,,, Guy came along and offered him stupid $$ for the truck.
This is a 1986 cobra roller engine.
Clean
Fresh bored
new pistons
Polished Alum dual plane
Mallory YL512CV Dist
And of course the Cobra V covers.
I really appreciate the feedback,,,, as I was also looking at a 64 Futura to run it in..
Thank you, Alex





 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Oaktree
General Automotive Discussion
2
Apr 1, 2008 07:42 PM
335clevo
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
8
May 27, 2002 06:48 PM
Mil1ion
1973 - 1979 F-100 & Larger F-Series Trucks
2
May 10, 2002 06:52 PM
airharley
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
1
Jan 30, 2002 08:27 PM
lf_9659
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
2
Jul 7, 2001 11:16 PM




All times are GMT -5. The time now is 08:55 PM.

story-0
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-1
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-2
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-3
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-4
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-5
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-6
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-7
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-8
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-9
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE