AFR 165 or AFR 185 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #1 of 37 (permalink) Old 10-09-2007, 11:06 AM Thread Starter
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AFR 165 or AFR 185

On a street driven 347 with a Comp Cams XE274HR, what is going to be the difference in HP and Torque between AFR 165 and 185 heads?

Anybody have a 347 with 165's? How do you like it?

RW
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post #2 of 37 (permalink) Old 10-09-2007, 11:07 AM
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Re: AFR 165 or AFR 185

165's are better on 289-302 motors, the 185's will work good on a street 347.

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post #3 of 37 (permalink) Old 10-09-2007, 12:27 PM
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Re: AFR 165 or AFR 185

Proabably about 20HP with that cam. Should still be plenty snappy down low too.
Brian

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post #4 of 37 (permalink) Old 10-09-2007, 02:38 PM
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Re: AFR 165 or AFR 185

I used to be a big pusher of the 165s, but anymore I think the 185s are probably the best bet for anything non-stock, and 205s for the more extreme. After all, before the AFR heads came around, the 'mild' heads (Windsor Jr, Performer, etc.) were always 180cc and the 'performance' heads were always 200+ccs... so I'm sure the AFR 185's won't be sluggish at all down low. The intake manifold will probably have a bigger impact on that than 165 vs. 185 cc heads.

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post #5 of 37 (permalink) Old 10-09-2007, 03:02 PM
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Re: AFR 165 or AFR 185

My vote is for the 185s. Get the CNC ported heads if you can fit them in the budget.

Patrick Brown

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post #6 of 37 (permalink) Old 10-09-2007, 03:40 PM
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Re: AFR 165 or AFR 185

I use the AFR 185 heads on everything I build with less than 500 HP. That should work out real good for you.
JOE SHERMAN RACING ENGINES
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post #7 of 37 (permalink) Old 10-10-2007, 03:12 PM Thread Starter
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Re: AFR 165 or AFR 185

Hey Motorhead,

What intake (carb) would you use here?
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post #8 of 37 (permalink) Old 10-10-2007, 07:16 PM
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Re: AFR 165 or AFR 185

rwvaught:
I am running the AFR185's on my 347 with the XE274H (flat tappet version of your) cam. I am using a Vic Jr intake and 650 VS carb in my '66 Mustang. It runs high 11's. Most people suggest using a 750 on a nicely built 347. I have one of those to test out soon. I'm hoping the 650 is a bottleneck.

*1966 Mustang, 347, AFR185, Vic Jr., Demon 750, C4, 8" rear, 235 drag radials....[email protected]
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post #9 of 37 (permalink) Old 10-10-2007, 07:22 PM
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Re: AFR 165 or AFR 185

Depends on what it's going in and what you wanna do with it. I guess the simplest answer would be, RPM or Stealth if it's going in a bigger car with higher gears for mostly street duty, Vic Jr. for a lighter car with low gears and more track time. Either way, I'd go with a 750 carb. Or, a nice Weiand tunnel ram with dual carbs for show and go

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post #10 of 37 (permalink) Old 10-11-2007, 11:10 AM
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Re: AFR 165 or AFR 185

Just a thought......

Take a look at Ford Racing GT-40X heads they are about $300 to $400 cheaper than the AFR's and out of the box Flow right with the CNC'd 165's and with a light blend the would flow the same as the CNC 185's.

Imagine that.........

This is based on published numbers from both manufactures with AFR cheating as usual using and 1 3/4 exhaust pipe and a 4.060 bore.....

Just to start an argument the AFR's aren't all that and a bag of chips......LOL

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post #11 of 37 (permalink) Old 10-11-2007, 03:19 PM
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Re: AFR 165 or AFR 185

They would NOT EVEN BE CLOSE

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post #12 of 37 (permalink) Old 10-11-2007, 03:33 PM
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Re: AFR 165 or AFR 185

Quote:
Originally Posted by BIGJOE View Post
They would NOT EVEN BE CLOSE

JOE SHERMAN RACING ENGINES
I wouldn't expect to hear any different from someone who sell's them......

It would be interesting to see a non-biased dyno Test, Say a Factory 5.0 short block, Performer RPM, and a simple E303 cam, between the 165's and the GT-40X heads. Out of the box parts and no Ringers......

I'd be willing to bet it would be pretty darn close and neither head would run away.

Then apply the $300-$400 savings you realized with the Gt-40x heads into some bowl and port work..........

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post #13 of 37 (permalink) Old 10-11-2007, 03:42 PM
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Re: AFR 165 or AFR 185

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Originally Posted by ou812 View Post
Proabably about 20HP with that cam. Should still be plenty snappy down low too.
Brian
bingo!!

I would get 185s over 165s. I bought the 165s cause I was going to use my stock pistons but ended with a new short block.


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post #14 of 37 (permalink) Old 10-11-2007, 07:11 PM
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Re: AFR 165 or AFR 185

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Originally Posted by dfree383 View Post
I wouldn't expect to hear any different from someone who sell's them......
Dang, do you know who you are talking about?

Joe Sherman does not need to come here to harp AFR heads. He's simply stating what he has personally observed. He's been chasing horsepower for over 40 years, and doesn't need to spam this message board to get business!

The Motorsport GT40-X head isn't even in the same ballpark as the AFR.

Some people like to -hate- the AFR since they are so popular... but they got popular for a reason. They are GOOD!

I purchased my first set of AFR heads back in 1995. They were a set of 195 Chevy heads for a 383 I was building for a street rod. They came in and I was AMAZED! The CNC port work looked AWESOME. I had never seen a head that literally needed NOTHING DONE TO IT. I had taken the grinder to every set of heads I had ever purchased.... until this set. It was great! Here was a set of heads that you could literally take out of the bag and install straight onto the engine!

Back then, I ordered straight from AFR, and they went through all the options over the phone... drilled for temp gauge, springs, retainers, valves, etc... and they came with my name hand written on them with a Sharpie. They had no plans on ever producing a Ford head back then. (I asked them) But, once the Fox body mustang really took over, they jumped right in.

To this day, over TEN years later, the competition has still not caught up! Some offer limited CNC offerings, but the price is high. AFR has GOOD heads at EXCELLENT prices.... once the quality of the port work is taken into consideration.

Only bad side... You used to have to be good with a grinder to be one of the FAST cars, but now, all you need for a DAMN good set of heads is a valid credit card!

Joe Sherman isn't going to tell you a load of crap in order to sell you a set of heads. He is GRACIOUSLY donating some of his time to come on here and help people out. I would suggest, that when Joe speaks, you LISTEN.

GT40 X heads are flat out JUNK compared to the AFR. That's just how it is.

Good Luck!
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post #15 of 37 (permalink) Old 10-11-2007, 08:02 PM
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Re: AFR 165 or AFR 185

Good Post n20mike. Joe is the man and has years of experience. He knows what works and what doesn't. I know, I listen when he speaks.

347 Stroker, 10.6:1, Vic Jr, World Jr. heads (2.02/1.60 valves), Custom 780cfm ProSystems 4150 Double Pumper, XE284H cam, MSD E-Curve, 4.30 gears/31 Spline axles, Tremec TKO 5 Speed w/.83 5th gear ratio.
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