GT40P header solution
Thread Starter
|
Senior User
Joined: Nov 2001
Posts: 151
Likes: 0
GT40P header solution
I bolted a set of flowtech long tube headers for a 351 in a truck like mine on a gt40p head to check spark plug clearance. It looks like there is a decent amount of cleance between the plugs and header tubes - as long as 90 degree plug wires are installed. The tubes run out and back over the plugs. The biggest hitch will be changing plugs. Three of the plugs cannot be removed with a standard plug socket and ratchet. However, if you get a plug socket with a hex made on the outside (advance auto sells one) the plugs can be changed without removing the headers by slipping the socket on the plug and using an open end wrench to turn the socket. If you take the rubber plug gripper out of the socket it makes this a little easier. I don't intend on changing plugs too often so this will only be a minor pain, which I will live with considering these are $120 headers, which are much cheaper than any other alternative. Keep in mind their might be some difference in bends from header to header. The set I bought will work for me though. I thought this information might help someone out.
Postmaster
Joined: Jun 2001
Posts: 4,496
Likes: 0
Are you using a standard length spark plug?
If so, you might wanna try Motorcraft AWSF-32E I believe thats the right part number, its the plug used on the mountaineer gt-40p heads, its a lot shorter for clearance issues with the stock exh manifolds. This might make your spark plug changes even easier, who knows? later
later
If so, you might wanna try Motorcraft AWSF-32E I believe thats the right part number, its the plug used on the mountaineer gt-40p heads, its a lot shorter for clearance issues with the stock exh manifolds. This might make your spark plug changes even easier, who knows? later
later
Thread Starter
|
Senior User
Joined: Nov 2001
Posts: 151
Likes: 0
I used autolite 764. It cross references the AWSF-32E motorcraft. I may be wrong but I believe Autolite and Motorcraft spark plugs are one and the same with a different name stamped on them. Hold one of each side by side sometime, you'll see what I mean. Accel makes a header plug that is about 1/4 inch shorter than a regular plug, but they cost around 3-4 times what a regular pplug does.
Last edited by bigbluetruck; Nov 14, 2004 at 10:50 AM.
Freshman User
Joined: May 2002
Posts: 35
Likes: 0
From: Metro Deeeeetroit, USA
Originally Posted by bigbluetruck
I bolted a set of flowtech long tube headers for a 351 in a truck like mine on a gt40p head to check spark plug clearance. It looks like there is a decent amount of cleance between the plugs and header tubes - as long as 90 degree plug wires are installed. The tubes run out and back over the plugs. The biggest hitch will be changing plugs. Three of the plugs cannot be removed with a standard plug socket and ratchet. However, if you get a plug socket with a hex made on the outside (advance auto sells one) the plugs can be changed without removing the headers by slipping the socket on the plug and using an open end wrench to turn the socket. If you take the rubber plug gripper out of the socket it makes this a little easier. I don't intend on changing plugs too often so this will only be a minor pain, which I will live with considering these are $120 headers, which are much cheaper than any other alternative. Keep in mind their might be some difference in bends from header to header. The set I bought will work for me though. I thought this information might help someone out.
Thread Starter
|
Senior User
Joined: Nov 2001
Posts: 151
Likes: 0
The set I have fit 88-96 the book says. A set of hookers for teh same application wouldn't even come close. The P heads are hit and miss on wether or not long tubes fit - depending on who made the header. My local Advance ordered in both sets so I could look them over.
Thread Starter
|
Senior User
Joined: Nov 2001
Posts: 151
Likes: 0
I've seen the manifold/headers from the explorers, I agree, it doesn't look like much. The long tubes headers are pretty much a check and see depending on what the application is. I hope you find a set that works. Accel make a shorter header plug that is 1/4 inch shorter but they aren't cheap. 90* plug boot will probably be nessesary on every header you try.
Mine are going on a 96 351 roller motor. The heads with stock pistons give me about 9.3:1 (my calculations) I've done a mild clean up on the heads. I'm rather proud of the port job I've done on the stock upper and lower intakes. Yep she's EFI and speed density, and I'm doing mods. I'll be running the flowtechs I talked about and probably flowmasters behind them. (hard to beat flows for sound) Waiting for heads to be hot tanked now, trying to decide on a roller can while I'm waiting for the heads to get back.
Mine are going on a 96 351 roller motor. The heads with stock pistons give me about 9.3:1 (my calculations) I've done a mild clean up on the heads. I'm rather proud of the port job I've done on the stock upper and lower intakes. Yep she's EFI and speed density, and I'm doing mods. I'll be running the flowtechs I talked about and probably flowmasters behind them. (hard to beat flows for sound) Waiting for heads to be hot tanked now, trying to decide on a roller can while I'm waiting for the heads to get back.
