Fordmods Logo

2V or 4V XD cleveland? 

 

Page 1 of 1 [ 14 posts ] 

 
 Post subject: 2V or 4V XD cleveland?
Posted: Fri Dec 08, 2006 10:06 am 
Oompa Loompa
Offline

Posts: 47

Joined: 14th Nov 2004

Location: Brisbane
QLD, Australia

Hey everyone,

my father in law has an XD 351 Cleveland Ute which he expects to have a burn valve on number 2. question is, when they say a 2v v8 clevo and a 4v v8 clevo, what does this mean? not sure if the v means valve or venturi (whatever that is). also how does effect the rebuild? different gaskets?

any info much appreciated.

Josh
Top
 Profile  
 
 
Posted: Fri Dec 08, 2006 11:53 am 
Getting Side Ways
Offline
User avatar

Age: 42

Posts: 1249

Joined: 5th Nov 2004

Ride: Falcon

Location: Melbourne
VIC, Australia

heres a good article on the differences http://reviews.ebay.com/Ford-351-Cleveland-Engines-Key-Facts-amp-Information_W0QQugidZ10000000001410755

I've cut a few little bits and pieces out to save you reading the whole thing, although its a VERY good read.

"351C engines were produced in standard "2V" and several distinct "4V" versions, where the numbers 2 and 4 indicate the number of venturis of the engine's associated carburetor. A 2V engine is one that came with a 2-barrel carburetor, while a 4V engine is one of a variety of 351C engines that came with a 4-barrel carburetor.
...
The heads are so different that they require 4V/2V-specific intake, exhaust manifolds and associated gaskets.
...
4V 351C heads have enormous intake & exhaust ports that mate to radically different, 4V style intake and exhaust manifold flanges. From within the engine compartment, 4V heads don't appear dramatically different from 2V heads, though with a few pointers they are easily distinguished. But take the intake manifold off, and you'll be stunned by the size of the intake ports."

 

_________________

I couldnt fix your brakes so I made your horn louder
Image

Top
 Profile  
 
 
Posted: Fri Dec 08, 2006 1:07 pm 
Oompa Loompa
Offline

Posts: 47

Joined: 14th Nov 2004

Location: Brisbane
QLD, Australia

thankyou for that info, very helpful. if im lucky i will be able to find out the info from the vin. thanks again.
Top
 Profile  
 
 
Posted: Fri Dec 08, 2006 2:44 pm 
Getting Side Ways
Offline
User avatar

Age: 42

Posts: 1249

Joined: 5th Nov 2004

Ride: Falcon

Location: Melbourne
VIC, Australia

Hey hey 1000 posts and it was actually something useful for once! swoit!

 

_________________

I couldnt fix your brakes so I made your horn louder
Image

Top
 Profile  
 
 
Posted: Fri Dec 08, 2006 7:25 pm 
Stock as a Rock
Offline
User avatar

Posts: 157

Joined: 19th Dec 2004

Location: Seaford
VIC, Australia

XD's only ever had 2V engines. The only thing that may have varied is the carb and manifold. 2brl or 4brl. The last 4V engines were in XB's in 1973. I don't think any 74 model's got 4V heads.

 

_________________

XB Fairmont sedan 11.07@123.02mph

Top
 Profile  
 
 
Posted: Sat Dec 09, 2006 8:45 am 
Getting Side Ways
Offline
User avatar

Posts: 1142

Joined: 17th Sep 2005

Ride: Falcon

Location: Adelaide
SA, Australia

Dont they say 4V's headr are only good for fanging down Conrod straight???

vik...too thirsty for a street car :shock: :shock: :shock:

 

_________________

[b]BANNED[\b]

Top
 Profile  
 
 
Posted: Sat Dec 09, 2006 10:23 am 
Stock as a Rock
Offline
User avatar

Posts: 157

Joined: 19th Dec 2004

Location: Seaford
VIC, Australia

Nah, they say that because some idiot started a myth that 4V heads have no low down power which is BS. 4V's are a factory performance head. 2V's aren't.

To expand on my earlier comment. XD 302's had 2V closed chamber heads and 9.2:1 compression. XD 351's had 2V open chamber heads and 8.9:1 compression.

 

_________________

XB Fairmont sedan 11.07@123.02mph

Top
 Profile  
 
 
Posted: Sat Dec 09, 2006 11:05 pm 
Getting Side Ways
Offline
User avatar

Posts: 1142

Joined: 17th Sep 2005

Ride: Falcon

Location: Adelaide
SA, Australia

brenx wrote:
Nah, they say that because some idiot started a myth that 4V heads have no low down power which is BS. 4V's are a factory performance head. 2V's aren't.

To expand on my earlier comment. XD 302's had 2V closed chamber heads and 9.2:1 compression. XD 351's had 2V open chamber heads and 8.9:1 compression.


If only you knew who to believe :x :x :x Opinions are ares holes

vik...and there are plenty around

 

_________________

[b]BANNED[\b]

Top
 Profile  
 
 
Posted: Mon Dec 11, 2006 11:28 pm 
EFI Guru
Offline

Age: 58

Posts: 4351

Joined: 5th Nov 2004

Gallery: 28 images

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

Location: Perth
WA, Australia

Sorry but it ain't no myth.....The fact is, compared to a 2V a 4V doesn't produce enough low rpm torque. It's simply that the 4V port is too big to make any serious low lift flow and port velocity. When the 4V was designed in the 60's it was a case of "big is better" but these days of course we know this is not the case.

Pete.
Top
 Profile  
 
 
Posted: Tue Dec 12, 2006 12:20 am 
Stock as a Rock
Offline
User avatar

Posts: 157

Joined: 19th Dec 2004

Location: Seaford
VIC, Australia

Pete,

I've seen plenty a 4V combo with low down power. Even ones with small hyd cams. I've spent plenty of time in the workshop that dyno tunes my car over the years. I've seen 4V engines in XW/XY/XA's go though none what I'd consider wild. To give you some idea 3.23 or 3.5 geared cars with stock - 2500rpm stalls. I've seen anywhere from 160-230rwkw on stock 4V's making power to a lazy 5500-6000rpm max. 4V's if the setups right do quite well.

The ones that can't get the low down power happening with 4V's generally have no idea. they keep sticking camshafts designed for 2V heads in 4V engines which have no chance of working as they should.

 

_________________

XB Fairmont sedan 11.07@123.02mph

Top
 Profile  
 
 
Posted: Tue Dec 12, 2006 11:28 am 
EFI Guru
Offline

Age: 58

Posts: 4351

Joined: 5th Nov 2004

Gallery: 28 images

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

Location: Perth
WA, Australia

I understand what you are saying Brenx. I too have seen many 4V's that go well but none can match the 2V combos I have worked on.
While the 4V's are starting to wind up the 2V engined cars have walked away. The only 4V that went better than a 2V in my experience was one that had port tongues fitted.
BTW it's no accident that our CHI heads have smaller ports than a 4V yet piss all over them.

Pete.
Top
 Profile  
 
 
Posted: Tue Dec 12, 2006 12:26 pm 
Getting Side Ways
Offline
User avatar

Posts: 1142

Joined: 17th Sep 2005

Ride: Falcon

Location: Adelaide
SA, Australia

XR9UTE wrote:
Sorry but it ain't no myth.....The fact is, compared to a 2V a 4V doesn't produce enough low rpm torque. It's simply that the 4V port is too big to make any serious low lift flow and port velocity. When the 4V was designed in the 60's it was a case of "big is better" but these days of course we know this is not the case.

Pete.


I thank thee for clearing that up...

vik...bigger aint always better...

 

_________________

[b]BANNED[\b]

Top
 Profile  
 
 
Posted: Tue Dec 12, 2006 12:50 pm 
Getting Side Ways
Offline
User avatar

Age: 52

Posts: 8590

Joined: 5th Nov 2004

Gallery: 5 images

Ride: AU Fairlane 5.0, KE Laser, 01 Kw

Location: Melbourne
VIC, Australia

I totally agree with Pete on this one.
The quickest NA Clevo i've seen was a 2V.
Top
 Profile  
 
 
Posted: Tue Dec 12, 2006 12:52 pm 
Getting Side Ways
Offline
User avatar

Age: 85

Posts: 1235

Joined: 7th Apr 2005

Gallery: 7 images

Ride: GTHO PH 1 EF ex chaser

Location: Willow vale, GOLD COAST
QLD, Australia

This also applies to carburation as a well setup 750cfm can be better than an 850 or bigger carburettor unless you are running to 8000 RPM or above :roll: :shock: at which time the 4V heads come into their own :D

 

_________________

Rotten Old Revhead!!! XW GTHO + EF ex cop car (exractors 2.5 cat back zorst !6" Simmons K&N +airbox mods Lowered with Bilstein shocks+Whiteline Bars NEXT THING Swap HO for GTP or Ferrari!

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 14 posts ] 

Who is online

Users browsing this forum: No registered users and 14 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 Fri Mar 29, 2024 8:13 am All times are UTC + 11 hours

 

 

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