Fordmods Logo

4V heads on Clevo? 

 

Page 1 of 2 [ 24 posts ] Go to page 1, 2  Next

 
 Post subject: 4V heads on Clevo?
Posted: Mon Sep 25, 2006 9:22 pm 
Smokin em up
Offline
User avatar

Age: 32

Posts: 280

Joined: 22nd Jan 2006

Ride: XB

Location: Hobart
TAS, Australia

Gday,

I have a dead head gasket and im using it as an excuse to get better heads and maybe a mild cam while im at it.

Im going to look at some 4V heads that are supposedly new and have been freshly done up with a P&P, HO valves, double coil springs, unleaded and some other stuff.

I currently run 2V's on my 351. Just wondering what I will need to change to run 4Vs if I get them and what gains I can expect.

Thanks

 

_________________

76XBGS, 383c, custom crow cam, 4V p&p heads, Isky SS Valve+springs, extractors, 2.5"twins, MSD Ignition, Edelbrock intake, Forged bottom end, Barry Grant 750DP, thermo, discs, toploader, Holley fuel pump, SUPERCHARGED!

Top
 Profile  
 
 
Posted: Mon Sep 25, 2006 9:27 pm 
Getting Side Ways
Offline
User avatar

Age: 36

Posts: 1249

Joined: 5th Nov 2004

Ride: Falcon

Location: Melbourne
VIC, Australia

I'd keep the 2V's, get some 4V valves in there.

 

_________________

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

Top
 Profile  
 
 
Posted: Mon Sep 25, 2006 9:43 pm 
Smokin em up
Offline
User avatar

Age: 32

Posts: 280

Joined: 22nd Jan 2006

Ride: XB

Location: Hobart
TAS, Australia

Thats sounds like a bit of work. Roughly how much should that cost? Im not planning on spending more than $1200 on the heads. The 4Vs I am looking at are $950.

 

_________________

76XBGS, 383c, custom crow cam, 4V p&p heads, Isky SS Valve+springs, extractors, 2.5"twins, MSD Ignition, Edelbrock intake, Forged bottom end, Barry Grant 750DP, thermo, discs, toploader, Holley fuel pump, SUPERCHARGED!

Top
 Profile  
 
 
Posted: Mon Sep 25, 2006 11:54 pm 
Getting Side Ways
Offline
User avatar

Age: 46

Posts: 8590

Joined: 5th Nov 2004

Gallery: 5 images

Ride: AU Fairlane 5.0, KE Laser, 01 Kw

Location: Melbourne
VIC, Australia

They'll bolt straight on, but you'll need 4V intake manifold and extractors to benefit from them, they'll cost as much if not more than the heads.

I'd only go 4V if you're looking at a much bigger cam than mild, and also at least 3.5 rear end gears, they lag low end power compared to 2V.
Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 4:34 am 
Fordmods Newbie
Offline
User avatar

Age: 44

Posts: 9

Joined: 19th Nov 2004

Ride: AU Fairlane, lowered, BA XR whee

Location: underwood
QLD, Australia

How much work has your motor got?
If your motor is only mildly modified then you may find these heads won;t do much for your car as they are designed to flow more air into and out of your engine at high rpm levels 6000+
If your motor only goes to 6500 or less then you are much better off using a 2V closed chamber head with 4V valves in it with a port and polish
The benefit of the closed chamber head over the open chamber is that it will slightly bump your compression up without need for changing pistons, saying this also if your motor is using closed chamber heads at moment then the 4V heads you are referring to will lose you power as they are open chambers and will drop your compression

At the end of the day it all comes down to your motor and what you want out of it

If relatively standard i would steer away from 4V heads

 

_________________

99 AU Fairlane V8, lowered, BA GT wheels, Black TL50 replica
97 NL Fairlane V8, Lowered, AU3 XR wheels
93 EB XR6
02 AU3 XR6 VCT Black ( sold )

Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 4:18 pm 
Stock as a Rock
Offline
User avatar

Posts: 157

Joined: 19th Dec 2004

Location: Seaford
VIC, Australia

get some tongues in the 4v's and you'll have the lowend of 2V's. Only use the tongues in the inlets. While your there? Remove the bump from the exhaust port if it's still there. You will need a 4V manifold. I suggest a strip dominator.

Don't waste your time with the 2V's.

 

_________________

XB Fairmont sedan 11.07@123.02mph

Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 5:39 pm 
Getting Side Ways
Offline
User avatar

Age: 36

Posts: 1249

Joined: 5th Nov 2004

Ride: Falcon

Location: Melbourne
VIC, Australia

I think 2V's certianly have their place, you are right a set of 4V's will allow you that usability up top.. if you ever get there and set of tounges will get you some of what the 2V's have but not 100% 2V bottom end. 2'vCC heads have the compression ratio factor on their side to, something that I think is important when looking to run richer fuels. In the end its horses for cources.

 

_________________

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

Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 5:45 pm 
Stock as a Rock
Offline
User avatar

Posts: 157

Joined: 19th Dec 2004

Location: Seaford
VIC, Australia

You can get closed chamber 4V's too. They have the same chamber size as the 2V's ;)

 

_________________

XB Fairmont sedan 11.07@123.02mph

Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 6:47 pm 
Getting Side Ways
Offline
User avatar

Age: 46

Posts: 8590

Joined: 5th Nov 2004

Gallery: 5 images

Ride: AU Fairlane 5.0, KE Laser, 01 Kw

Location: Melbourne
VIC, Australia

brenx wrote:
You can get closed chamber 4V's too. They have the same chamber size as the 2V's ;)

No they don't, they are larger in the chamber than the 2V 302 heads.

I'm a fan of 2V if done right, especially for the street.

You're right about the Strip Dominator, but try and find one for a 4V, they were rare as rocking horse s**t 12 odd years ago, and back then were pulling $900 second hand.

I think we're all getting ahead of ourselves lol, Mac is on a budget and doesn't want to spend much so he's trying to get the best value for money.
Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 7:28 pm 
Stock as a Rock
Offline
User avatar

Posts: 157

Joined: 19th Dec 2004

Location: Seaford
VIC, Australia

So how did XY GT HO's end up with 11:1 compression ;) 4V's come in open chamber and closed. Just the same as 2V's. Technically the 4V CC is slightly bigger due to the larger valves needing deshrouding.

Image

 

_________________

XB Fairmont sedan 11.07@123.02mph

Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 7:57 pm 
Smokin em up
Offline
User avatar

Age: 32

Posts: 280

Joined: 22nd Jan 2006

Ride: XB

Location: Hobart
TAS, Australia

Ok thanks for the input but I took a look at the heads today and they ate NOT 4V, they are 2V. Which I was actually hoping for because I dont want to buy a new intake manifold and exhaust.

These heads are mickey mouse, never been on a car, new hardened valves (Black, cant remember the brand), seated for unleaded, HO guides, new double compression springs for upto 600thou lift and new rockers. They have not been ported and polished but I got a quote from a bloke there that has been doing Clevos since the 60s for $600 for the usual tidy up and opening up of the valve throats.

The total package ready to bolt on is going to be 1600 which I think is a pretty good deal for having everything new. Im 75% sure im going to drop in a mild cam while the engine is half apart. I am after a crow cam with a little bit of lope on idle and lower to midrange power, not concerned with above 5000. Anyone had any experiance with something like this?

What do you think about this package now that I have a bit more info?

 

_________________

76XBGS, 383c, custom crow cam, 4V p&p heads, Isky SS Valve+springs, extractors, 2.5"twins, MSD Ignition, Edelbrock intake, Forged bottom end, Barry Grant 750DP, thermo, discs, toploader, Holley fuel pump, SUPERCHARGED!

Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 8:31 pm 
Stock as a Rock
Offline
User avatar

Posts: 157

Joined: 19th Dec 2004

Location: Seaford
VIC, Australia

I'd be 100% set on the 4V's ;) For the $ the deal sounds good.

 

_________________

XB Fairmont sedan 11.07@123.02mph

Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 9:51 pm 
Getting Side Ways
Offline
User avatar

Age: 46

Posts: 8590

Joined: 5th Nov 2004

Gallery: 5 images

Ride: AU Fairlane 5.0, KE Laser, 01 Kw

Location: Melbourne
VIC, Australia

Just looking at the pics (Regardless of unshrouding for valves) the size is bigger and shape is different. I see the 2V has been pluged for a Boss setup.

I used to have the CC's memorised but that was a long time ago.
If it serves me correctly, the 4V closed were around 68, the 2V closed were 63, the 2V open were 76 cc.

To be honest Mac, they sound a bit on the exy side for what you can buy if you look around.
And saying things like HO guides is just pissing in your pocket, they sound like a basic pair of 2V heads done for gas with the usual bronze guides and a set of springs.
I'm actually owed a pair of closed 4V's from a mate but i've been waiting for years, i will get em eventually but he's just a slack a***.
Top
 Profile  
 
 
Posted: Tue Sep 26, 2006 11:00 pm 
Getting Side Ways
Offline
User avatar

Age: 42

Posts: 452

Joined: 21st Dec 2004

Gallery: 1 images

Location: Adelaide
SA, Australia

2V and Australian 4V were 72.2-75.2cc open chamber (9.1:1 comp)
Imported 4V were 64.6-67.6cc closed chamber (11:1 compression)

 

_________________

Adrian
EF Fairmont, 5.0Lt, Pacemaker Headers, Sports cats, Redback muff, T5 manual, 16" Tickford rims, Tickford "Body Styling", DBA Gold Rotors, Heritage Green, JVC MP3
XB Coupe, 351C, twin system, C4 shift kitted auto, 9" LSD, Eccose Blue, very loud !!!!

Top
 Profile  
 
 
Posted: Wed Sep 27, 2006 9:42 pm 
Tyre Shredder
Offline
User avatar

Age: 31

Posts: 325

Joined: 15th Apr 2006

Ride: F350, EF2 Ghia, XC & Corty

Power: 218 rwkw

Location: Wangaratta
VIC, Australia

Dont forget the factory poptop forgies

 

_________________

13.28@103.73mph

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 2  [ 24 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: No registered users and 8 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 Wed Dec 13, 2017 3:12 am All times are UTC + 11 hours

 

 

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