GT40p, Lincoln Logs and #5 plug

[Pirate]

I'm thinking you should use angled spark plugs.

[Smokestacklightnin]

i'm running Delco R42LTS copper plugs. These, however, are 2 heat ranges colder than needed for nitrous application. But you can run copper plugs in the gt40p heads. The Motorcraft equal would be AGSF22C. For stock heat range you would need AGSF22A in a motorcraft. There are spark plug cross reference websites that can be used to get a different brand. I have similar clearance issues on cylinders 2-4, but 1,5-8 are fine. I am running FRP shorties.

[1990LTD]

Are lincoln logs direct replacements? flanges matching up and such

[Lincolnmania]

Are lincoln logs direct replacements? flanges matching up and such

yes
using a pr on my 92 with cats from a 89 vic and a new h pipe for a box

[Neal 97 250]

Yes they are a direct replacement. They fit all of my stock exhaust and everything. Direct bolt up to the GT40P heads too.
But as ou can see they are tight with plugs but so are the shorty headers. I would say an even match as far as tightness.

[1990LTD]

yes
using a pr on my 92 with cats from a 89 vic and a new h pipe for a box

is that a stock ho motor?

[FatNasty]

Im running p heads and the lincoln logs in my wagon. I had to loosen up the manifold to get #5's plug out. Tried fabbing something up out of sockets that size to get around it but didn't have any success. I guess its the cost of doing a budget build. And definitely need 90* boots on 5 and 6... maybe 7.

[1980c10]

Is it just me, or do lincoln logs look like they would make a pretty sweet twin turbo setup? Upside down and foward facing of course.

[P72Ford]

This isn't entirely relevant, but it is kind of.

Does anyone have experience with the FRPP headers for the P heads? Do they provide adequate access to the plugs?

[Neal 97 250]

Is it just me, or do lincoln logs look like they would make a pretty sweet twin turbo setup? Upside down and foward facing of course.

Looks may be deceiving. If you look at them closely they are pretty restrictive. They have dimples on each side of each tube for the bolts I believe. The passage is pretty narrow compared to a real header.

I didn't get a chance to try the socket thing last night because I had to replace my water pump on my truck. Didn't plan on that at all. And had to change the oil in the wife's ride because she is going out of town today.
I will try tonight with the socket and let you know if I have any success.

Thanks for the suggestions guys. If it doesn't work I will do the manifold removal. At least it is on the easy to get to side.

[pantera77]

Their certainly not as good as stock mustang shorties. But their the best direct bolt in available, even if they flow probably about the same as the stock manifolds, their alot lighter. And better looking.

Hope I don't need to do plugs on the 89 any time soon.

[FatNasty]

This isn't entirely relevant, but it is kind of.

Does anyone have experience with the FRPP headers for the P heads? Do they provide adequate access to the plugs?

Im using those on my marquis and they work great, easy clearance all around and you don't need to use 90* boots or anything. Only downside is the price.

[Lincolnmania]

This isn't entirely relevant, but it is kind of.

Does anyone have experience with the FRPP headers for the P heads? Do they provide adequate access to the plugs?

plenty of room, and those are the ceramic coated ones i installed on there

[zoomie]

Zoomie, Killer good information. I believe a cut socket just may work. The room from behind the header pipe and the plug tip is not as much on the lincoln logs as it is on the BBK shorties but I just may be able to get that cut socket to work.
Awesome tip, thanks.

The plugs I am using are recommended for the Explorer engine for sure. It recommend the 4 electrode Iridium tips but they are hella expensive so I went with the platinum ones.
Why do you say they are no good?

What are your opinions on the shortie plugs? better or worse and why?

Vicky, sorry I thought you meant straight boots. No idea why I had that in my head.

the bosch plat 4s are just a expensive waste of money due to that they only spark of one side or the other on the plugs, the on eguy i knew of that ran shorty plugs had a 400 chevy motor, ran pretty good. shorty plugs are just that, short they will work just fine.
if your going iridium just use the reg tip ones, i have a set in my linc and also my sonata, they work very well.

[Neal 97 250]

Im using those on my marquis and they work great, easy clearance all around and you don't need to use 90* boots or anything. Only downside is the price.

You wouldn't happen to have any pics would you?
If those are as good as you explain they may be worth the price