351 stroker question - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 01-18-2006, 00:08   #1 (permalink)
Registered User
 
Join Date: Aug 2002
Location: New Zealand
Posts: 220
351 stroker question

I have a couple of 400M cranks. Is it possible to use these to make a 4" stroke cleveland? The main jurnals would obviously need to be turned down. The perhaps using a 302C rod there may be a piston that would be suitable?

Any ideas or experience with this?

Cheers
Tris
xafalcon is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-18-2006, 22:48   #2 (permalink)
74 XB Fairmont
 
brenx's Avatar
 
Join Date: Sep 2001
Location: Cranbourne, Vic
Posts: 5,113
Re: 351 stroker question

It's not a conversion I've seen done. Although I have heard of it. I wouldn't imagine it'd be cheap?
__________________
XB Fairmont (street car) 11.07@123.02mph.
brenx is offline   Reply With Quote
Old 01-19-2006, 00:05   #3 (permalink)
under thumb
 
xyfmtjoe's Avatar
 
Join Date: Jan 2005
Location: mt gambier S.A
Age: 41
Posts: 286
Re: 351 stroker question

I would say it would be an easier conversion in a 351windsor block as I think they drop straight in.
__________________
Ford mad and proud of it 71xyfmt, 96ef xr8, 82xe 's'pac 400k old workbus!
xyfmtjoe is offline   Reply With Quote
Old 01-20-2006, 05:21   #4 (permalink)
351 XE on LPG
 
Join Date: Jul 2003
Location: Perth, Western Australia
Posts: 742
Re: 351 stroker question

I've read somewhere that it takes a heap of machining, then balancing, and you still only end up with a weakened cast crank.
Rhett is offline   Reply With Quote
Old 01-20-2006, 05:58   #5 (permalink)
'60 F100 Q-Code
 
davis's Avatar
 
Join Date: Mar 2004
Location: Washington, USA
Posts: 750
Re: 351 stroker question

Quote:
Originally Posted by xafalcon
I have a couple of 400M cranks. Is it possible to use these to make a 4" stroke cleveland? The main jurnals would obviously need to be turned down. The perhaps using a 302C rod there may be a piston that would be suitable?

Any ideas or experience with this?

Cheers
Tris
The short answer is that the 400 (no M) is already a 4" stroke Cleveland. Just put a set of good heads on it, use a decent inlet and some extractors.

I definitely would not recommend turning down the main journals to fit the Cleveland main size. You'd have to take them down by a quarter inch. As Rhett says: it takes a heap of machining, then balancing, and you still only end up with a weakened cast crank.

There is no way that a 400 crank will ever fit in a 351 Windsor block. They both have 3" mains, but the bearing spacing is different and so are the bearing thrust surfaces. You can't even reasonably machine a 400 crank to fit a 351W.

The 400 crank will drop in to a 351M.

The Scat 9000-series "cast steel" cranks (and other manufacturer's corresponding components) are very low cost. Unless you happen to own a machine shop, they are a much cheaper option than cutting down a 400 crank to fit to a 351 Cleveland block.


:davis:
davis is offline   Reply With Quote
Old 01-20-2006, 15:39   #6 (permalink)
Registered User
 
Racer's Avatar
 
Join Date: Oct 2002
Location: Sydney
Posts: 992
Re: 351 stroker question

Quote:
Originally Posted by davis
There is no way that a 400 crank will ever fit in a 351 Windsor block. They both have 3" mains, but the bearing spacing is different and so are the bearing thrust surfaces. You can't even reasonably machine a 400 crank to fit a 351W. :davis:
I beg to differ. I used to own one until just recently.

The 400 crank was turned down and fitted with Chrysler 265 rods. It came out at around 426ci. It used to be a fairly common conversion down here (in a 351 Windsor).

But its not the thing to do these days, with cheap stroker cranks available. The cost of mallory alone would buy you a finished, purpose built crank.

We also used to fit Cleveland cranks into 302 Windsors - but thats another story...
__________________
Old School Cortina: 9.87@138
The "other" car: 10.41@127
Racer is offline   Reply With Quote
Old 01-21-2006, 04:50   #7 (permalink)
'60 F100 Q-Code
 
davis's Avatar
 
Join Date: Mar 2004
Location: Washington, USA
Posts: 750
Re: 351 stroker question

Quote:
Originally Posted by Racer
I beg to differ.
Don't waste your time. Do they "drop" right in? No. Is it even reasonable to machine one to fit? No. There is nothing to "differ" with.


:davis:
davis is offline   Reply With Quote
Old 01-21-2006, 06:22   #8 (permalink)
Registered User
 
xdclevo's Avatar
 
Join Date: Mar 2004
Location: Cairns
Posts: 1,946
Re: 351 stroker question

Quote:
Originally Posted by davis
Don't waste your time. Do they "drop" right in? No.
:davis:
davis, i don't think he is machining one up right now. Have you been on the heavies
xdclevo is offline   Reply With Quote
Old 01-23-2006, 22:14   #9 (permalink)
Registered User
 
Join Date: Aug 2002
Location: New Zealand
Posts: 220
Re: 351 stroker question

Haven't checked this thread for a few days and look what's happened. All hell breaking loose. PAW (Performance Automotive Wharehouse, USA) makes a 427W stroker kit using a machined down and offset ground (4 1/8" stroke) 400M crank and uses chrysler 360 rods and a KB off the shelf piston. From what I've read, no mallory is needed. It is balanced in combination with a 50 oz-in flexplate and balancer. The kit retails for US$400 over a basic 351W kit so the machine work can't be too drastic.

So I thought rather than attacking the rod journals like the windsor conversion above, why not reduce the main journals and it becomes a 4" stroke cleveland crank. Won't be any weaker than a standard cleveland crank, and how often do they fail? Thought somebody may have done it before. But by the sounds of it this is not the case. Probably a good reason not to have a go myself - if it was practical someone would know someone who has done it before.

Thanks for the input though. Always appreciate another opinion.

Cheers
Tris
xafalcon is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Cleveland Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 15:10.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.