Factory Five Racing Forum banner
1 - 20 of 24 Posts

·
proud builder&owner
Joined
·
201 Posts
Discussion Starter · #1 ·
I can get a cheap 390 block, wanted to know if it can be stroked to 427 ?
Also need to know if all the 390´s are FE engines?
Thanks guys.
Fernando.
 

·
The Never-Ending Builder
Joined
·
5,329 Posts
It's not stroking it that gets you to 427, they both have the same stroke, 3.784,
the bore is the difference, 390-4.052, 427-4.232, you would have to take a .180 over bore, which it won't.

Hank
:darkbluecoupe:
 

·
Charter Member
Joined
·
1,775 Posts
I have read that some of the 390 truck block will bore to 4.023. But you have the have it sonic tested to know before they bore it.

One of our member has a truck block bored to 427 size.


You may check with someone like Keith Craft or DSC Motorsports for a block.

link to DSC http://www.dscmotorsport.com/


Dwight
 

·
Too much is just enough.
Joined
·
5,872 Posts
FE's are never cheap. The 427 FE block was specially designed due to the large bore. I wouldn't risk boring a 390 that much, Ford didn't like the odds either. All 390's are from the FE engine family, but they are kinda like a red headed step child. You can't do much with them where it really counts. If you pony up for an aluminum FE block, you can do a ton of stuff with it. The parts just cost a lot.
 

·
Registered
Joined
·
1,149 Posts
With a stroker kit a 390 ( at .080 over bore ) will go as large as 441 cubes. I have a
397" FE in my roadster, (.040 overbore) and it has more torque than you can use and it is faster than you need. and it sounds really nice!
 

·
1st RFM/FFR Legacy Winner
Joined
·
27,947 Posts
I like Jeffs solution. When someone asks if you have a 427, you can "At least".

Greg
 

·
Registered
Joined
·
1,055 Posts
Simply take your 390 block and go with a 4.25" crank from Barry at Survival motorsports. That alone gets you 445 cubic inches plus you'll get a huge amount of torque the the small block guys can't match.

You don't want to be boring 390 block much over .030 and it's a good idea to have it sonic tested first.

Bruce
 

·
Registered
Joined
·
4,497 Posts
i believe a 410 merc is easier to stroke to 427
its a secret though:evil:
 

·
Charter Member
Joined
·
2,612 Posts
Simply take your 390 block and go with a 4.25" crank from Barry at Survival motorsports. That alone gets you 445 cubic inches plus you'll get a huge amount of torque the the small block guys can't match.

You don't want to be boring 390 block much over .030 and it's a good idea to have it sonic tested first.

Bruce
Ditto on what Bruce said. Here's a link for the stroker kits.
Not sure about shipping to Venezuela.

http://www.survivalmotorsports.com/FE-Engine-Kits.html

Rob
 

·
Official OLD GUY
Joined
·
3,880 Posts
427 bore

It's the bore size that restricts us from taking anything FORD makes to a 427 standard bore engine; 4.230". There aren't any blocks that were produced by FORD that would go that far without horrible ramifications. Yes, there are a few truck blocks that could be bored farther (.130) then the standard blocks, but you would be running on thin ice at that thin a cylinder wall.

If it's just cubic inches you desire, why not just go with a 428 . . . 1" larger, tons of torque and no over-boring to get that displacement. Or, put a 428 crank in your 390 and it will be that 410 Merc motor mentioned above.

FORD produced the 390 to be the "work-horse" of it's big car line for many years. There are plenty of power-adding mods that can be done to this engine to make it a real screamer.
Had one in the late sixties that produced 600 FWHP (.030 over {396CI}, 12:1, .600" lift 330° cam by Holman & Moody).

HTH

Doc :beerchug:
 

·
Registered
Joined
·
4,497 Posts
Simply take your 390 block and go with a 4.25" crank from Barry at Survival motorsports. That alone gets you 445 cubic inches plus you'll get a huge amount of torque the the small block guys can't match.

You don't want to be boring 390 block much over .030 and it's a good idea to have it sonic tested first.

Bruce
you studdered when you said small block guys:evil:
i will stick with my sbf, but if i ever want i can put one in front of the tranny i got.
remember torque can tear a tranny up, if the tranny can't handle the torque then you need to make your u-joint the weak-link.
 

·
Registered
Joined
·
4,497 Posts
damn secret is out

same center to center
same main/rod diam
410 and all 428 engines have a 3.98 stroke
as the 390 and 427's have a 3.78 stroke
the 410 was internal bal.
the 428 external the only FE external bal. engine

the 390 does have lots of big and little brothers
so do watch for what block you have
 

·
Registered
Joined
·
494 Posts
X2 on the 390/445!! More than you'll ever need in a C*[email protected] roadster. I've got a stock bore 428 w/4.25 stroker = 455 ci. When I do another FE, I'll use a 390 +.030 and a 4.25 stroker kit = 445.

So, yes, you can take a 390 to 427 (and beyond). The cubic inches will be there, just not the same bore and stroke configuration as the original 427, which was really a 425. 427 was big bore/shorter stroke. 390/445 will be smaller bore (than 427) but longer stroke. No need to spin it past 6,000 rpm, you've got tons of torque from 2,500 on up. As long as you keep it below 6,000, 2 bolt main caps are fine, instead of crossbolted.

There are some good FE truck blocks out there, and some FE service blocks from the early 70's that have a lot more "meat" in them; webbing around main bearings, etc. Everyone is looking for 427 & 428 blocks, and overlooking the 390's.

Use alum heads, intake and water pump, you're not much heavier than a small block, and you're much, much lighter than a 429/460!
 

·
Official OLD GUY
Joined
·
3,880 Posts
Secret

Secret . . . hell, that's common knowledge.

428 w/ 390 crank = 406 (remember that one, little brother to the 427)
390 w/ 428 crank = 410
427 w/ 428 crank = 454

Ain't mix-N-match fun?

Doc :beerchug:
 

·
proud builder&owner
Joined
·
201 Posts
Discussion Starter · #18 ·
I love this forum...Thank you guys for the info. Let´s see the :moneybag:, needed for this.
Fernando
 

·
Premium Member
Joined
·
9,135 Posts
Hi,
We're building another stroker 390 to a 445 right now. I'll post the video and power once it's dynoed.
 

·
Registered
Joined
·
2,927 Posts
We also just spent about a $1000.00 to tell us that 2 427 side oiler fe engines would NOT be able to be used........

Disassemble clean sonic test sonic test again bores do not have enough meat on them to even go .010 over
 
1 - 20 of 24 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top