Head Q's: Have 351W heads, Compare to 351 Heads...

brentwoodboy

New Member

Nov 25, 2002

472

0

0

Brentwood, TN

Aug 4, 2004

#1

• Aug 4, 2004

• #1

Head Q's: Have 351W heads, Compare to Aftermarket Heads...

My dad is a Ford collector so to speak, and we have several engines lying around. Right now I have a 5.0 from an old Cobra that I am going to put in my car. Heads wise, should I look into buying Twisted Wedges, or use some 351 W heads I already have (freebies)? I could also get alot of work done to them. What do you think?


BTW when I say Twisted Wedges, I basically mean any head you can buy i.e. AFR 165's etc...

 

thumper460

Founding Member

Jul 24, 2000

3,022

2

56

Orange Park , Fl

Aug 4, 2004

#2

• Aug 4, 2004

• #2

the Cobra engine IS GT40 heads!! they are Better than the W heads..

Just me.........................

Thumper

 

B

baglock1

The Bartender

Founding Member

Aug 25, 2001

6,612

1

78

Space Coast, FL

Aug 4, 2004

#3

• Aug 4, 2004

• #3

thumper460 said:

the Cobra engine IS GT40 heads!! they are Better than the W heads..

Just me.........................

Thumper

Click to expand...

Unless by "old cobra" he means a Shelby.

 

Joes95GT

New Member

Jan 23, 2003

3,132

1

0

Delaware

Aug 4, 2004

#4

• Aug 4, 2004

• #4

thumper460 said:

the Cobra engine IS GT40 heads!! they are Better than the W heads..

Just me.........................

Thumper

Click to expand...

Yup.

"A lot of work done" on a set of GT40 heads = A lot of horsepower.

Joe

 

blksn955.o

Founding Member

Mar 15, 2002

3,263

0

66

st.louis mo 314

Aug 4, 2004

#5

• Aug 4, 2004

• #5

I will toss these up for ref. GT40 iron heads off a 95 cobra, Thumper style (for the 3 or 4 members that missed my pic post). IF the head is a late model (assum. there off a truck and not a 93-95 "L") they should be E7 heads. If they are old casting (ecept boss,cleavland 2venturi or 4venturi) they are more than likly not as good as new castings and designs have made a huge diff. and even the larger boss,2v,4v heads need a good motor with alot of stroke to make anykind of streetable power from what I have read and talked to at our local track.

proted gt40 heads..........

 

brentwoodboy

New Member

Nov 25, 2002

472

0

0

Brentwood, TN

Aug 5, 2004

#6

• Aug 5, 2004

• #6

How can I know for sure it is a Cobra motor?

 

blksn955.o

Founding Member

Mar 15, 2002

3,263

0

66

st.louis mo 314

Aug 5, 2004

#7

• Aug 5, 2004

• #7

on the face (area were the brackets go) there will be 3 vert. lines on the inside (intake side of head) corner of the head these are part of the casting marks gt40(non-P) heads the P heads have 2 lines, also there is a GT cast into one of the far corners (ouside of vavle cover area) the other side just has numbers, and one cast GT in the oil vally area. there would be a gt40 intake if its a cobra long block w/intake. the shortblocks were the same as the GT cept for cam.

 

RydeOn

Licensed to Chill

Founding Member

Sep 26, 2000

6,273

1

77

orange county, CA

Aug 5, 2004

#8

• Aug 5, 2004

• #8

Have the Cobra (GT40) heads worked by Thump or get some nice aluminum heads. Dont go with the 351 heads, they suck.

 

BlackVert

15 Year Member

Oct 3, 2003

5,589

9

98

Bethesda, MD

Aug 5, 2004

#9

• Aug 5, 2004

• #9

RydeOn said:

Have the Cobra (GT40) heads worked by Thump or get some nice aluminum heads. Dont go with the 351 heads, they suck.

Click to expand...

the 351 cleveland heads are pretty good, much better than the 351 windsor heads.

 

blksn955.o

Founding Member

Mar 15, 2002

3,263

0

66

st.louis mo 314

Aug 6, 2004

#10

• Aug 6, 2004

• #10

yes cleavland heads need some moding to work though, and the 4v will need some stroke to work well on the street since the runners are so friggin huge. I was talking to a local guy at GIR (track here in STL, where WFC is) and he was running a 4v headed motor in a fox. We were talking to him about how they worked and he said the only way to get the use out of the runners is to stroke the motor to about 393+

 

Joes95GT

New Member

Jan 23, 2003

3,132

1

0

Delaware

Aug 6, 2004

#11

• Aug 6, 2004

• #11

Cleveland heads won't work on a Windsor block.

Joe

 

blksn955.o

Founding Member

Mar 15, 2002

3,263

0

66

st.louis mo 314

Aug 6, 2004

#12

• Aug 6, 2004

• #12

they will if you do some pluggin and stuff I had a article on how to do it.

 

brentwoodboy

New Member

Nov 25, 2002

472

0

0

Brentwood, TN

Aug 6, 2004

#13

• Aug 6, 2004

• #13

Thanks for the info, you guys are a wealth of knowledge!

 

Joes95GT

New Member

Jan 23, 2003

3,132

1

0

Delaware

Aug 6, 2004

#14

• Aug 6, 2004

• #14

blksn955.o said:

they will if you do some pluggin and stuff I had a article on how to do it.

Click to expand...

Would the valves clear the stock pistons? Aren't Cleveland heads a canted valve design? If so, how would you run the pushrods off of the lifter?

I'm not being a jerk. If I come across that way, I apologize. I'm just curious.

Joe

 

blksn955.o

Founding Member

Mar 15, 2002

3,263

0

66

st.louis mo 314

Aug 6, 2004

#15

• Aug 6, 2004

• #15

I have a thing that tells how somewhere, if I can dig it out/find it I will post all the info. As far as pushrods and stuff, good question I guess since the cam is still inside the lifter valley the diff. would be in lenght of pushrod/ and angel of pushrod on lifter (as they do sit in some kind of ball/socket setup) dont realy know how that would effect things (prob. a issue with longevity/parts life). But I realy dont know, just saying what I have read that it is possible to use "C" heads on a "W" motor and vice versa.

I too think it would be alot of work and unknown's when there are so many heads avail. that are better suited for "W" use and have a higher degree of modern tech. and R&D in them.