GT40 Heads...again

Tim; No prise money yet but.......Last time 79 looked under my motorbox he just laughed. I bet I could get him up for the challenge tho. I'll look on e-bay altho I have never had any success getting anything there. Always afraid I am bidding on the wrong thing. Congrats to 81, he will be adding to an already sweet boat.

Opps......PLBC will be tellin' me to "get a room" next.

john

TRB: What do you want for the Performer? Will it take my Holley ok? I have a 351W in the '80. Thanks. Gotta get me some of those heads someday as well, can't swing $500 right now.

john

LOL

I love Tim's enthusiasm. Always there when somebody has an easy or technical question. He's given out thousands of dollars worth of mechanical advice. I'm sort of "mechanically challenged" in some ways, but Tim and several other folks have tweaked my knowledge. Joel's right, Tim's always right there when you need him.

Ken

M3Fan wrote: 81nautique wrote: Joel, Tim's email isn't listed or I would have just asked him directly. He's the guy I was looking for anyway. I didn't mean it in the sense that someone would intentionally be looking for TRB but more in the sense of poking some fun at TRB for being so enthusiastic about GT40 heads and advanced engine work in general. Eh, oh well. Some things just don't go over right in text.

Umm, My comment was meant to be humorous too, guess I better work on my delivery. Here's a couple smileys for ya

81nautique wrote: Joel, Tim's email isn't listed or I would have just asked him directly. He's the guy I was looking for anyway.

I didn't mean it in the sense that someone would intentionally be looking for TRB but more in the sense of poking some fun at TRB for being so enthusiastic about GT40 heads and advanced engine work in general. Eh, oh well. Some things just don't go over right in text.

M3Fan wrote: Posts like this are like putting out the "bat signal" for TRB. Tim's boss: What's wrong Tim? TRB: There's been a disturbance in the force. Someone mentioned swapping GT40's on CCFan...

Judging from his posts,he certainly has done his homework.

    Mike

1. yes
2. yes
3. yes
4. yes

All the PCM ProBoss and GT40 motors used the regular GT40 heads.

The GT40p's were debuted on the Explorer's and Mountaineers in '98. Theyre a slightly better design than the GT40's, as they flow a little better all around despite having smaller exhaust valves (intake valves are the same size). They also give a little jump in CR. I believe the GT40p's put me right around 9.5:1.

I had no problem dropping them right onto my motor- I reused the stock pushrods and rockers. The spark plug angle actually improves clearance to the exhaust manifolds.

I got the p's real cheap on ebay ($230). If I were to do it again, Id get them from Tristate Cylinder head for $550. Once I paid for a valve job and upgraded springs, I spent more than that.

After reading all the old posts I'm still confused, can someone verify a few points for me. I am shopping for gt40 heads for my 81 351w

Do I have my facts straight?

1.GT40 heads have 63cc chamber.
2.GT40P heads have 59cc chambers.
3.Both are a bolt on using ALL existing valve train parts
4. Either casting will fit with my PCM exhaust manifolds, ei: angled plugs?

Also

Did the pro boss motor and the later GT40 motor have the same castings and which one Gt40 or Gt40P.

Hate to bring this all up again but I want to do this right the first time. Thanks.