Fordmods Logo

393 or 408 

 

Page 1 of 1 [ 12 posts ] 

 
 Post subject: 393 or 408
Posted: Wed Dec 08, 2010 5:59 pm 
Oompa Loompa
Offline

Age: 50

Posts: 38

Joined: 6th Jul 2008

Ride: XT Fairmont XGXR6 BAXR6

Location: Perth
WA, Australia

Im looking to stroke my 351 cleveland & Im not sure if I should go with a 393 or a 408.
Whats the pro's & con's with each?
Cheers Brad
Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Thu Dec 09, 2010 1:14 am 
Getting Side Ways
Offline

Age: 36

Posts: 9453

Joined: 9th Nov 2004

Gallery: 4 images

Ride: Fordrunner 5.0 Turbo

Location: Wollongong
NSW, Australia

Assuming that a 408 is just a 393 with oversized pistons I'd just go with the 393. Was never a fan of overboaring anyway.
Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Thu Dec 09, 2010 9:52 am 
Oompa Loompa
Offline

Age: 50

Posts: 38

Joined: 6th Jul 2008

Ride: XT Fairmont XGXR6 BAXR6

Location: Perth
WA, Australia

393 has a 3.85" crank
408 has a 4" crank

The bore is the same
Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Thu Dec 09, 2010 11:10 am 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 863

Joined: 26th Nov 2007

Gallery: 20 images

Ride: XH Ute / AU3 V8 Wagon

Location: Bris-Vegas
QLD, Australia

I'd probably stay with the 393, the 408/4" stroke can have camshaft clearance issues, but it will make bulk torque. 393 cubes will still pull like a school boy, and make good power with standard heads, or good heads. Less mucking about if your building it yourself. If you getting the engine built, ask the shop what they recommend, they have probably done a few.

 

_________________

Yes, I own a Ute. No, I won't help you move!

EL Wagon Build Thread http://www.fordmods.com/the-garage-f53/sooty72-s-ef-futura-wagon-long-term-project-t90025.html
XH Ute Thread http://www.fordmods.com/post1138970.html#p1138970

Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Thu Dec 09, 2010 11:12 am 
Oompa Loompa
Offline

Age: 50

Posts: 38

Joined: 6th Jul 2008

Ride: XT Fairmont XGXR6 BAXR6

Location: Perth
WA, Australia

Im going to be using CHI 185 heads as Ive allready got a set off another engine if that makes any difference
Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Thu Dec 09, 2010 10:48 pm 
Getting Side Ways
Offline

Age: 36

Posts: 9453

Joined: 9th Nov 2004

Gallery: 4 images

Ride: Fordrunner 5.0 Turbo

Location: Wollongong
NSW, Australia

aren't they a bit too small for 393+ cubes?
Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Thu Dec 09, 2010 10:59 pm 
Oompa Loompa
Offline

Age: 50

Posts: 38

Joined: 6th Jul 2008

Ride: XT Fairmont XGXR6 BAXR6

Location: Perth
WA, Australia

xcabbi wrote:
aren't they a bit too small for 393+ cubes?


They probably are yeah, but like I said I already have them
The plan is to put them on a clevo stroker short motor with a solid flat tappet cam.
When or "if" I get bored with the power I'll pull them off & get them ported & probably upgrade to a roller cam at the same time
Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Fri Dec 10, 2010 8:42 am 
Getting Side Ways
Offline
User avatar

Age: 45

Posts: 863

Joined: 26th Nov 2007

Gallery: 20 images

Ride: XH Ute / AU3 V8 Wagon

Location: Bris-Vegas
QLD, Australia

Sounds cool, but i reckon go for the roller straight up, even if it is just a hydraulic. Easier than going thru the hole flat tappet run-in hassles...

 

_________________

Yes, I own a Ute. No, I won't help you move!

EL Wagon Build Thread http://www.fordmods.com/the-garage-f53/sooty72-s-ef-futura-wagon-long-term-project-t90025.html
XH Ute Thread http://www.fordmods.com/post1138970.html#p1138970

Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Fri Dec 10, 2010 9:40 pm 
Getting Side Ways
Offline
User avatar

Age: 43

Posts: 427

Joined: 5th Nov 2004

Ride: xd fairmont

Location: newcastle
NSW, Australia

go 393 185s are too small for 408 and may ping unless you get a huge cam and will be useless on street then you want low torque not high hp, talk to engine builder first , stay with one persons info and stick with a tried combo or you will find out the hard way to happiness
Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Sat Dec 11, 2010 7:58 pm 
EFI Guru
Offline

Age: 52

Posts: 4289

Joined: 5th Nov 2004

Gallery: 28 images

Ride: 351 Vogue,XH 5.0,'17 5.0 Stang

Location: Perth
WA, Australia

xcabbi wrote:
aren't they a bit too small for 393+ cubes?


Nope.
Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Fri Dec 17, 2010 9:31 am 
Getting Side Ways
Offline

Age: 43

Posts: 469

Joined: 4th Jun 2006

Gallery: 35 images

Ride: xy fairmont

Location: Perth
WA, Australia

mate i went a 393 over a 409 purely for piece of mind, as iam running the CHI 218cc heads and turn mine to 7500rpm, but i also opted to resin fill my block to the welshplugs, for that added extra strength, the 218's possed a clearence problem when i droped the donk in check out my Gallery pic's and you will see what i mean, the 185s will be great on a 393 and will make an awsome street engine, that will leave most in your wake :D and you will be able to achieve awsome power without turning it past 6000rpm...

Mate ide go the 393 for piece of mind but the fact the 185's produce all the power below the 6000rpm ide be very tempted to step up to the 408, although i am not aware if the are capable of maching that amount of cubes

 

_________________

If you have it under control then you dont have enough power..
There is no replacement for Displacment..

Top
 Profile  
 
 
 Post subject: Re: 393 or 408
Posted: Fri Dec 24, 2010 11:58 am 
Oompa Loompa
Offline

Age: 44

Posts: 45

Joined: 30th Aug 2008

Location: Cairns
QLD, Australia

sooty72 wrote:
the 408/4" stroke can have camshaft clearance issues, but it will make bulk torque.


pinkbits8u wrote:
go 393 185s are too small for 408 and may ping unless you get a huge cam


Just don't listen to these two comments and you'll do ok. haha
Both are that far from the truth, its not funny.

The CHI185's actually work REALLY good with 408 cubes and if cammed right will make well over 600HP. Or if you want it more streetable, stick with a smaller flat tappet strreet cam and make 500-550 easy.

I only have 205CC AFD heads on my 408C and going on 4 years, i havnt had to touch a single thing on the motor, and i shift at 7500rpm when on it. And i'm close to 600hp in the old girl.

 

_________________

XD Sedan Streeter
10.7 @ 125 mp/h
AFD 2V heads
TFC manifold

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 12 posts ] 

Who is online

Users browsing this forum: No registered users and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Tue Dec 12, 2017 2:48 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names