Fordmods Logo

351 unleaded??? 

 

Page 1 of 1 [ 13 posts ] 

 
 Post subject: 351 unleaded???
Posted: Mon May 26, 2008 5:56 pm 
Getting Side Ways
Offline

Age: 31

Posts: 2337

Joined: 25th Apr 2008

Ride: Boxcar Love

Location: Brisbane
QLD, Australia

Hey guys.

I can't seem to find much info on this subject, so here goes,

I have a 1979 P6 LTD, with the factory 351 4V clevo. I have binned the carter carb in favor of a 600 vac sec holley.

I am currently doing a full resto on the car, and while the engine is out i was planning on changing the front and rear main seals, valve guide seals, and the head gaskets. While i am at it i thought about the unleaded full. So,

Does anything in a 351 clevo need to be changed to safely run on unleaded?

I've been told that they are built strong enough that the lack of lead doesn't hurt the valves, seats etc, but i can't confirm.

Any help appreciated,

Thanks
Andrew

 

_________________

Commodore australia's favorite car??? What a load of s**t
Image

Top
 Profile  
 
 
Posted: Mon May 26, 2008 6:48 pm 
Getting Side Ways
Offline

Age: 38

Posts: 1320

Joined: 5th Nov 2004

Ride: 66 Coupe

Location: Perth
WA, Australia

you will need to put hardened inserts in the heads to relaibly run unleaded / lpg, but being a factory motor, its probably going to neeed a complete freshen up.
Top
 Profile  
 
 
Posted: Mon May 26, 2008 7:10 pm 
Getting Side Ways
Offline

Age: 31

Posts: 2337

Joined: 25th Apr 2008

Ride: Boxcar Love

Location: Brisbane
QLD, Australia

Ok cool.

The rest of the motor is fine, compression is still very high, no smoke or oil consumption, and is still quite a tight and very healthy sounding motor. Thats why i'm only doing the seals while its out.

So hardened inserts 'ey? Cool, i will fit some of these.

So they valves will be sweet?

 

_________________

Commodore australia's favorite car??? What a load of s**t
Image

Top
 Profile  
 
 
Posted: Mon May 26, 2008 7:47 pm 
Getting Side Ways
Offline

Posts: 631

Joined: 27th Jan 2007

Ride: Supercharged BA XL ute

Location: Gordonvale
QLD, Australia

Sodium filled stainless steel valves wouldn't hurt either.

 

_________________

BA XL ute.
P'maker headers',Hi flow cat,3" sports sytem,
Raptor V-clutched lightweight not intercooled,no tranny cooler,no worries.

Top
 Profile  
 
 
Posted: Mon May 26, 2008 8:05 pm 
Getting Side Ways
Offline
User avatar

Age: 38

Posts: 661

Joined: 14th Jan 2007

Ride: T1 TE50 P01

Location: Perth NoR
WA, Australia

Don't worry about changing the valves unless the stems are worn (if everything else is staying stock).

I'd definitely fit a set of bronze K-line inserts for the valve guides, and also some hardened exhaust seats. That on top of a cylinder head service will see the old girl motoring along for another 30 years.

 

_________________

TE50 T1 P01
200kw 5.0L, T5, Koni shocks, King S/Lows, Whiteline swaybars, DBA 4000 rotors, Acron CAI, 80mm Accufab TB, Difillipo headers & cats, twin 2.5" & Aerochambers, 3.91 LSD.

To Come:
Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

Top
 Profile  
 
 
Posted: Mon May 26, 2008 8:08 pm 
Getting Side Ways
Offline

Age: 38

Posts: 1320

Joined: 5th Nov 2004

Ride: 66 Coupe

Location: Perth
WA, Australia

the only other thing i would suggest is spending the $130 odd on a new timing cover, if its 30 years old, chances are its close to dumping the water into the sump.
Valves should be ok, but replacements are cheap anyway
Top
 Profile  
 
 
Posted: Mon May 26, 2008 8:10 pm 
Getting Side Ways
Offline

Posts: 631

Joined: 27th Jan 2007

Ride: Supercharged BA XL ute

Location: Gordonvale
QLD, Australia

Actually i'd do the valves as the stockers will cup and recess into the seats.And if you harden the seats it will happen sooner
And run some sort of upper cylinder lube as a safety.
It's going to run hotter so sort something out.

 

_________________

BA XL ute.
P'maker headers',Hi flow cat,3" sports sytem,
Raptor V-clutched lightweight not intercooled,no tranny cooler,no worries.

Top
 Profile  
 
 
Posted: Tue May 27, 2008 9:32 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

Or you could look at a set of alloy heads. Edelbrock do a very nice complete Performer cylinder head, approx $3000.00 a pair, bolt on. Or a set of CHI 3V's (bit expensive though). That way you get everything new, hardened seats, and a big weight saving for better performance and fuel economy.
Just a thought, as a 30 year old cleveland head will be pretty well stuffed when you get them off. Do your sums before deciding what to do. :D

 

_________________

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  
 
 
Posted: Tue May 27, 2008 11:44 am 
Getting Side Ways
Offline
User avatar

Age: 38

Posts: 661

Joined: 14th Jan 2007

Ride: T1 TE50 P01

Location: Perth NoR
WA, Australia

sooty72 wrote:
Or you could look at a set of alloy heads. Edelbrock do a very nice complete Performer cylinder head, approx $3000.00 a pair, bolt on. Or a set of CHI 3V's (bit expensive though). That way you get everything new, hardened seats, and a big weight saving for better performance and fuel economy.
Just a thought, as a 30 year old cleveland head will be pretty well stuffed when you get them off. Do your sums before deciding what to do. :D


CHI/AFD are cheaper than Edelbrocks... And perform better as well. If the budget is going to stretch to alloy heads I'd get some CHI 190cc 2Vs.

 

_________________

TE50 T1 P01
200kw 5.0L, T5, Koni shocks, King S/Lows, Whiteline swaybars, DBA 4000 rotors, Acron CAI, 80mm Accufab TB, Difillipo headers & cats, twin 2.5" & Aerochambers, 3.91 LSD.

To Come:
Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

Top
 Profile  
 
 
Posted: Tue May 27, 2008 12:08 pm 
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

Don't forget we are talking Cleveland here, not windsor. $3k for a fully assembled pair of alloy heads for a clevo is pretty good. CHI's are nearly that expensive bare....

 

_________________

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  
 
 
Posted: Tue May 27, 2008 12:13 pm 
Getting Side Ways
Offline

Age: 38

Posts: 1320

Joined: 5th Nov 2004

Ride: 66 Coupe

Location: Perth
WA, Australia

Not to start another AFD / CHI fight, but heres prices on AFD heads, starting at 2500 complete.

http://www.airflowdynamics.com.au/Products/Pricing.htm
Top
 Profile  
 
 
Posted: Tue May 27, 2008 5:01 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

sooty72 wrote:
Don't forget we are talking Cleveland here, not windsor. $3k for a fully assembled pair of alloy heads for a clevo is pretty good. CHI's are nearly that expensive bare....


CHI's are $1900 bare....nowhere near $3000!
Besides Edelbrocks are s**t compared to either of the Aussie heads.
Top
 Profile  
 
 
Posted: Tue May 27, 2008 5:55 pm 
Getting Side Ways
Offline

Age: 31

Posts: 2337

Joined: 25th Apr 2008

Ride: Boxcar Love

Location: Brisbane
QLD, Australia

66 coupe wrote:
the only other thing i would suggest is spending the $130 odd on a new timing cover, if its 30 years old, chances are its close to dumping the water into the sump.
Valves should be ok, but replacements are cheap anyway


Thats a great idea, i will inspect this and most likely replace it, as i have heard of this before.

As for replacement heads, i'm not at all looking for any more power, only keeping it fresh and reliable on unleaded, as the car is just a weekend cruiser. Never sees above 3000rpm or 100k's. :)

Spoke to the guy who built a couple of race engines a while back, he said he can supply me a VRS kit, and rebuild my heads for me, converting them the unleaded/gas setup for approx $900, so i think i'll go with that. I don't want it apart again.

Thanks guys
Andrew.

 

_________________

Commodore australia's favorite car??? What a load of s**t
Image

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 13 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 19, 2017 6:22 am All times are UTC + 11 hours

 

 

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