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Piston To valve clearance on AFR 165's

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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Piston To valve clearance on AFR 165's

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Old 03-30-2007, 06:55 PM
  #1  
dantheman345
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Default Piston To valve clearance on AFR 165's

I have a 1992 crate engine 5.0 and I wanted to know if any of you had piston to valve problems after taking of the stock heads and putting on the AFR 165's cnc ported. I already have the heads torqued down. It would really suck if I had to take a head off and do the clay deal. Any suggestions?


(I kept the stock pistons)
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Old 03-30-2007, 07:13 PM
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my77stang
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Default RE: Piston To valve clearance on AFR 165's

depends on the cam - turn it over real slow to check and see

seriously, unless you got some monster lift, long duration cam - you'll be fine
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Old 03-30-2007, 07:13 PM
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dantheman345
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Default RE: Piston To valve clearance on AFR 165's

I am running the F303 cam .512

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Old 03-30-2007, 07:19 PM
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my77stang
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Default RE: Piston To valve clearance on AFR 165's

why spend all that money and stick with an alphabet cam?

anyways, ya your fine - and it'll still make plenty of power even with that cam
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Old 03-30-2007, 07:22 PM
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dantheman345
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Default RE: Piston To valve clearance on AFR 165's

I didn't do that much research on a cams. What do you think would be the best cam for my setup? what is the most lift you think I could run I am using the Crane 1.6 Hydrolic Rockers
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Old 03-30-2007, 08:04 PM
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AdderMk2
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Default RE: Piston To valve clearance on AFR 165's

an F cam with AFR165cc heads will clear the stock pistons in a 87-95 block... will not work with 86 blocks... and im unsire about previous years
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Old 03-30-2007, 08:06 PM
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my77stang
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Default RE: Piston To valve clearance on AFR 165's

cam selection depends on what your shooting for. it also depends on what kinda trans you have, are you gonna run a higher stall if your using an automatic? rear end gears, intake, fuel injection / carb being used, etc etc etc.

what are your plans with this car?
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Old 03-30-2007, 08:13 PM
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dantheman345
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Default RE: Piston To valve clearance on AFR 165's

This is just my weekend car, and I want to be fast and I am not worried about gas prices or running 92 octane. I put in 3.83 rear end 4 months ago. I am using a Avenger Edlebrock 650 I have a toploader 5 speed trans with overdrive. I am looking for a good ET and do a little street racing.


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Old 03-30-2007, 08:56 PM
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my77stang
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Default RE: Piston To valve clearance on AFR 165's

actually, i was pretty impressed with the dyno numbers for your setup. i have been doing alot of sim dyno pulls for people and when compared to the few people who had real dyno reads on their motors the sim comes pretty F'in close.

431 HP @ 6000 RPM



i'm gonna plug in a few different cams and see if i find something better....all in all your gonna be a happy camper
*edit*

by going to a Trick Flow Stage 1 roller (almost identical power numbers as a ford E303), you'd be loosing peak HP but gaining 35-45 HP in the 2500-3000 range which is much more useable power

399 HP @ 5500 RPM




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Old 03-30-2007, 09:02 PM
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Default RE: Piston To valve clearance on AFR 165's

like i said earlier you are having to much fun with that program[8D]
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