Pulling the trigger on AFR's
Thread Starter
Melting Slicks
Joined: Jul 2006
Posts: 2,285
Likes: 487
From: Salmon Arm, BC
Pulling the trigger on AFR's
I've decided to go with some AFR 195's 65cc heads for my 406.
The question is should I go with the straught plug 1034's, or go with the angle plug 1040's. Back in the day there was HP to be found with the angle plugs, but is there any benefit to angle plug heads these days??
How about fitment around the headers, (I've got headman elites) any problems with plugs or plug boots burning.
Any other knowledge out there......
The question is should I go with the straught plug 1034's, or go with the angle plug 1040's. Back in the day there was HP to be found with the angle plugs, but is there any benefit to angle plug heads these days??
How about fitment around the headers, (I've got headman elites) any problems with plugs or plug boots burning.
Any other knowledge out there......
Melting Slicks
Joined: May 2012
Posts: 2,192
Likes: 343
From: Allenton Wisconsin
Good question, for myself I'm looking at the at the 1036 straights or the 1038 angles. Also have the Hedman headers, but need to lower compression and better flow so I can push the air in. Like the idea of the angles but wonder about burning the wires. Right now running Dart Pro 1s straights with no problem. From the research I've done the angle provides a better combustion due to a better plug tip location. Not much help was I? T
Team Owner
Joined: Apr 1999
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Unless AFR has changed the location of new casting angle plug heads they are not the most header friendly head on the market. I had to alter my hooker s/c on one primary. Where my previous Dart angle plugs had no problem.
Your other problem will be having to go to a single plane intake to match up port size and your header size really needs to be at lease 1 3/4.
Read the specs on those AFR head port sizes.
I use 210cc on my 383
Your other problem will be having to go to a single plane intake to match up port size and your header size really needs to be at lease 1 3/4.
Read the specs on those AFR head port sizes.
I use 210cc on my 383
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From: Corsicana, Tx
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I would just use straights....and as GKull mentioned..unless you're keeping RPM way down...I'd look at a larger set of heads. 406" is a lot of cubes to feed.
Don't get me wrong....195's will do OK....but........
JIM
Don't get me wrong....195's will do OK....but........
JIM
Race Director
Joined: Dec 1999
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From: Forked River NJ
I also ran 210s on my 383. Fairly large solid roller cam but I took it to 7000 rpm quite a lot. For a 406 I would go with the 210s. As said also 1 3/4 headers are a must for that many cubes to get the most out of it.
Safety Car
Joined: Jan 2009
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From: anchorage ak
I got straight plug 195s on my 400, fit headers fine, running an rpm air gap now and 1.625" headers, am going single plain and 1.75" headers this winter, kinda wish I'd gone 210s though.
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Safety Car
Joined: Oct 2004
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From: Youngstown Ohio
210cc Eliminators on my sb427. I have the 75cc chambers, which bring the C.R. to 10.5. This works well with pump gas. Also, the newer style heads have a slightly different plug location improving the angle, giving more room for header clearance (I have angle plugs and Hooker Super Comps 1¾" tubes)....plenty of room.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
I've decided to go with some AFR 195's 65cc heads for my 406.
The question is should I go with the straught plug 1034's, or go with the angle plug 1040's. Back in the day there was HP to be found with the angle plugs, but is there any benefit to angle plug heads these days??
How about fitment around the headers, (I've got headman elites) any problems with plugs or plug boots burning.
Any other knowledge out there......
The question is should I go with the straught plug 1034's, or go with the angle plug 1040's. Back in the day there was HP to be found with the angle plugs, but is there any benefit to angle plug heads these days??
How about fitment around the headers, (I've got headman elites) any problems with plugs or plug boots burning.
Any other knowledge out there......
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
Race Director
Joined: Apr 2000
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I had Edlebrok Vic Jrs 215cc ( cc'ed to 219 ) on my old 406ci. The torque curve was flat as a table top with close to 400ft/lbs @ 2000RPM at the wheels. I would not go anything less than 210's, especially if they are not too much more coin. 
Thread Starter
Melting Slicks
Joined: Jul 2006
Posts: 2,285
Likes: 487
From: Salmon Arm, BC
Thanks for all the replys guys. It sounds like I should be considering larger heads.....but I'm kind of worried about killing good torque and street manners.....just a street car with occasional days at the track.
Thread Starter
Melting Slicks
Joined: Jul 2006
Posts: 2,285
Likes: 487
From: Salmon Arm, BC
Hey there Robert, thanks for the reply. My engine has the 15cc dished pistons, so compression was calculated at 10.3 with my 64cc vortec heads.... I think I'll be all right with the 65cc heads.
Pro
Joined: Oct 2009
Posts: 664
Likes: 89
From: Marysville Ohio
I was running a 406 with AFR 195 (1034) and a dual plane intake - street driver only, had plenty of torque where I wanted it. It was really strong from 2000 RPM up, and had plenty to get me going off idle too. Loved every minute of it until a roller rocker C-clip gave out... but that's another subject.
If you race, go bigger, but the 195s will be fine for light-to-light acceleration and highway driving. I also have a set of the same heads on my 383 (which is now back in my car so I can drive it) - great heads for either combination IMO.
If you race, go bigger, but the 195s will be fine for light-to-light acceleration and highway driving. I also have a set of the same heads on my 383 (which is now back in my car so I can drive it) - great heads for either combination IMO.
