Opus Dork
Nov. 27, 2009 3:28 p.m.

I just had my block magnafluxed and it came back OK, but it will need to be bored .060 over. Any one have words of wisdom to either do it or not. The car does not weigh that much and the engine will be put back into fairly stock form (no major power adders). Any thoughts or tips are appreciated.

Thank you

Travis_K Dork
Nov. 27, 2009 3:31 p.m.

I dont have any ford specific knowledge, but for a stock engine boring it that much is usually ok. I wouldnt put any expensive machine work into it though, becasue thats probably last rebuild for that block. I have heard of a chevy small block (just a cheap remanufactured one) that was bored .080 over and lasted a long time with no problems.

John Brown SuperDork
Nov. 27, 2009 3:34 p.m.

Depending on your intentions I rebuilt a .060 5.8L with a roller cam conversion from Crane, a TFS cam, GT40 aluminum heads, 1.7:1 roller rockers and 10.5: CR, with an Edelbrock Performer RPM intake and a 750cfm carb. It was a stout runner. Never on a dyno.

pres589 Reader
Nov. 27, 2009 5:27 p.m.

Have a machine shop sonic test the block for a read on wall thickness and if there's enough meat to safely bore to .060. I don't know how much wall thickness is recommended though, but the information has to be out there somewhere, the shop itself should have manuals that explain this for this specific application.

cwh SuperDork
Nov. 27, 2009 5:38 p.m.

I've done .60 over on a 351 for a boat motor, no problems at all. A good set of heads (VERY important) and a bit of cam, you will have an excellent motor. Cam selection will decide what you get out of it. They are stout.

tuna55 Reader
Nov. 27, 2009 8:24 p.m.

.060 over isn't usually a big deal except on castings that are well known for core shift - don't know specifically, but sonic testing can tell you for sure. Keep in mind you're actually getting a bigger engine - small difference but hey - not in a bad direction.

dean1484 Dork
Nov. 27, 2009 8:56 p.m.

Are you doing the assembly?

If you have the time I would recommend working on oil return to the pan. Get some of your favorite libation and spend some quality time with the block grinding off all Th casting slag and what not in the motor. Other than that I would get the rotating assembly balanced. You can do alot of this your self with a scale and a grinder working on the pistons and rods. Then send it out. I think I had it done for $150 the last time. I do this to every motor I build even if the rest of it is going to be stock components used in stock form. When you get things balanced make sure to include the clutch assembly and the flywheel. This basic recipe has had many otherwise stock 4AGE's I have built go places in the RPM scale that I would not have dreamed of and they survived. Motors like to be in balance and the cost is minimal. I look at as just good standard motor assembly practice.

jwdmotorsports HalfDork
Nov. 28, 2009 6:40 a.m.

What year block is it? I remember reading that blocks from the mid 70s through the mid 80s are poor casting and prone to cracking.

You'll need to log in to post.

Also on Grassroots Motorsports

Reader's Ride of the Week: Enviate Hypercar

4 hours ago in News

There’s fast and there’s FAST–and then there’s this thing.

Join the Grassroots Motorsports Dyno Day

3 days ago in News

Join us for a dyno day in Sterling, Virginia.

From the GRM Vault: The Art of Understatement

4 days ago in Articles

The Harvey brothers dominated autocross in an obsolete Datsun a couple decades ago.

2017 Volkswagen Golf TSI SE

4 days ago in New Car Reviews

The quintessential European hatchback continues to pour out of Volkswagen's plants. Our test car featured four doors, a turbocharged 4-cylinder ...

We're Giving Away a $500 Race Ramps Certificate

5 days ago in News

Joining the drawing is totally free.

25 Project Path

5 days ago in Articles

A walk through 25 of our favorite project cars from the past.

Our Turbo Miata Goes Boom

6 days ago in Project Cars

Engine swap and suspension revamp before our race in two weeks? Challenge accepted.

The Ultimate Weekend Getaway for Your Car Club

1 week ago in News

Save a corral space just for your club at the Mitty.

Reader's Ride of the Week: V8 Jag

1 week ago in News

It’s a long-wheelbase 1974 Jaguar XJ6 fitted with a 350-cubic-inch Chevy V8.

Honing Cylinders

1 week ago in Project Cars

We hone our LS1's cylinders

Break Maiden

1 week ago in Articles

Creating a turbocharged road racing champion from a vintage Ford Mustang.

Meet Us at Sebring

1 week ago in News

We'll be at the Mobil 1 Twelve Hours of Sebring. Will you?



Grassroots Motorsports Magazine

Subscribe Today

Also get your instant access to the digital edition of Grassroots Motorsports Magazine!

Learn More