piston/valve clrnc on 86 5.0

myred86gt · 10-05-2001, 12:40 PM

How large of a valve and how much lift is
safe on a 86 302 with stock flattops w/o
valve notches. I understand thats the way
all 86 blocks came. I can't seam to get an
honest answer from any enginebuilders.
Plan on some Edelbrock performers with a
#18 saleen cam.

84LX89GT · 10-07-2001, 05:09 PM

The only advice that i can give you is since you're going to work on your engine anyway, just take out the pistons and have them notched for valve clearance, so that way you don't really have to worry about it. I've heard that the clearances on those 86 engines are VERY close, so it would probably be worth the time and effort to notch them. I personally can't tell you how much clearance there is so i guess i'm not much help

. Good luck!

Dark Knight · 10-09-2001, 02:10 PM

there's a tool you can buy that will let you notch the pistons wheil they're in the car..
I think summit sells it...

------------------
84 convt,'95 302,AFR's, performer
3.55's, underdrives BBK shorties
stock cam, 1.7's
13.85@102.5
and a '68 stang that WAS nasty ;-)

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10-05-2001, 12:40 PM	#1
myred86gt Registered Member Join Date: Sep 2001 Posts: 17	piston/valve clrnc on 86 5.0 How large of a valve and how much lift is safe on a 86 302 with stock flattops w/o valve notches. I understand thats the way all 86 blocks came. I can't seam to get an honest answer from any enginebuilders. Plan on some Edelbrock performers with a #18 saleen cam.

10-07-2001, 05:09 PM	#2
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	The only advice that i can give you is since you're going to work on your engine anyway, just take out the pistons and have them notched for valve clearance, so that way you don't really have to worry about it. I've heard that the clearances on those 86 engines are VERY close, so it would probably be worth the time and effort to notch them. I personally can't tell you how much clearance there is so i guess i'm not much help . Good luck!

10-09-2001, 02:10 PM	#3
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	there's a tool you can buy that will let you notch the pistons wheil they're in the car.. I think summit sells it... ------------------ 84 convt,'95 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.85@102.5 and a '68 stang that WAS nasty ;-)