Help With Piston to Valve Clearance

1WLDSTANG · November 12th, 2006, 04:15 PM

Hello. I am a 19 year old college studen living on my ow. I recently found a great deal on a 92 mustang 5.0 HO motor for my 1967 stang. The problem is it has GT40P heads. They require special headers that they just don't make for 1st gen mustangs. Since i am on a budget aftermarket heads are out of the equation. Recently a guy i know from work found a set of 302 heads from a 1968 mustang. C8OE casting i believe. The heads have been ported and polished and now sport 2.02 intake and 1.60 exhaust along with all the valve train equipment for a hydraulic roller cam. All from comp cams. he wants 3 hundred as he is moving p to AFRs and doesnt need anymore. This seems perfect for me at this moment givin my budget but desire to still have some degree of performance. My question is, using the stock 5.0 HO cam pistons and 1.6 ratio rockers, will i have piston to valve clearance issues with the 2.2 and 1.60 valves. Is there anyone running a similar setup utilizing stock components with this size valves? I don't want to purchase if i'm giong to have to notch pistons. Any experience or advicew would be great. Thank you for your help.
Mike

1slo5.0 · November 12th, 2006, 04:58 PM

You will have to mock it up and check the valve to piston clearance. Chances are you will run into problems with the 2.02 intake valve with stock 5 liter pistons.

Drgnracin72 · November 12th, 2006, 07:11 PM

yeah probably have to cut the pistons

November 12th, 2006, 04:15 PM	#1
1WLDSTANG Newbie Join Date: Nov 2006 Posts: 4 iTrader: 0 reviews	Help With Piston to Valve Clearance Hello. I am a 19 year old college studen living on my ow. I recently found a great deal on a 92 mustang 5.0 HO motor for my 1967 stang. The problem is it has GT40P heads. They require special headers that they just don't make for 1st gen mustangs. Since i am on a budget aftermarket heads are out of the equation. Recently a guy i know from work found a set of 302 heads from a 1968 mustang. C8OE casting i believe. The heads have been ported and polished and now sport 2.02 intake and 1.60 exhaust along with all the valve train equipment for a hydraulic roller cam. All from comp cams. he wants 3 hundred as he is moving p to AFRs and doesnt need anymore. This seems perfect for me at this moment givin my budget but desire to still have some degree of performance. My question is, using the stock 5.0 HO cam pistons and 1.6 ratio rockers, will i have piston to valve clearance issues with the 2.2 and 1.60 valves. Is there anyone running a similar setup utilizing stock components with this size valves? I don't want to purchase if i'm giong to have to notch pistons. Any experience or advicew would be great. Thank you for your help. Mike

November 12th, 2006, 04:58 PM	#2
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	You will have to mock it up and check the valve to piston clearance. Chances are you will run into problems with the 2.02 intake valve with stock 5 liter pistons. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

November 12th, 2006, 07:11 PM	#3
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,638 iTrader: 2 reviews	yeah probably have to cut the pistons __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

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