Plug angle on AFR heads and others

[Decurion]

Is the spark plug angle on the AFR 165 heads the same as the old heads, or is it closer to the gtp heads? Im wondering because I bought a set of 185 Roush Jrs a while back, only to find I had to use a 3lb install kit to make em work with my headers. Ive since taken the car partly apart, and sooner or later Id like to get it back together, but dont want to have to beat a new set of (expensive) headers to get em to fit. I could be wrong, but I think there are some Mustang headers that will clear, but Ive got a 65 Comet, so most Mustang headers dont work. Trust me when I say that finding good Falcon/Comet headers is not easy. God help you if you have gt40P heads and a clutch cable! Anyway, I wanted to use a set of 165 AFRs when I put the car back together, but do they have the old style plug angle? If not, what heads in the 165-185cc range have the old plug angles?

 

[10secgoal]

I wonder. The only head I've ever known about was the P head that had a different plug location. Maybe TW ? But the AFR are the same as stock

 

[D.Hearne]

I've heard about the World heads plug angle being different before. One of the guys on the PRS V8 swap forum encountered the same thing. My Canfields have the stock plug angle.

 

[Fast63]

The Roush 180's have stock plug angles, I've got them. The only problem I have had in that area is having to use a small 90 degree plug boot on the #5 cylinder because the header tube is close. Maybe something is wrong with your headers?

 

[GT1966]

Coincidence

I can't believe it. i just logged-on to inquire about Windsor Jr. heads on a '87 5.0 with Tri-Y headers from Branda in my '66 and here you're going through the same thing. At present, my #2 plug could be hand tightened, but no socket would clear the header tube. I went to the hardware store, purchased a cheezy emergency "tube" socket for outboard motors, etc., cut it down, drill a couple holes for the bar, and was able to get it on and tightened the 1/16th turn. However, #5 plug won't even clear the header at the terminal connector end (wrong angle), which means I'll have to remove the header and create a semi-circular indentation for the plug access...what a hassle. Gotta wonder what that does to the efficiency of that cylinder!
Cliff

 

[D.Hearne]

#5 was the same plug the guy on the Ranger V8 swap forum had issues with. He was using Mustang Tri-Y's too. (they fit Rangers better than the Stangs)

 

[GT1966]

Tri-Y modification for Cyl. #5

Just ordered a mandrel bent 1 1/2" J-tube with a 2" radius from the local speed shop. Looks like the only way to create enough clearance for the sparkplug and boot is to cut-out the tube portion which angles from the header flange toward the rear and instead come straight out and hook a 90 degree turn. The J-tube has plenty of material, so I'll just assume it will take more than one pass to make the correct fitment. Measure twice, cut once! I'll post a picture this weekend. Too bad I'll spoil that beautiful plated finish... kind of "rat", I guess?
GT1966