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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.

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Old 02-09-2008, 08:31 PM   #1
stamper5.0
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Default would i have to flycut?

im getting a new cam ....had the b 303 cam....want a bigger one...but not to big so i dont have to flycut my pistons...... would i have to fly cut with this cam??....

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89 hatch.
306 protopline aluminum heads. 555 570 lift comp nitrous cam. edelbrock performer rmp intake. and 100 NX wet shot.
aod w. 3500 stall 3.73 rear gear
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Old 02-09-2008, 09:09 PM   #2
stamper5.0
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Default RE: would i have to flycut?

someone had to kno something...help me out
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89 hatch.
306 protopline aluminum heads. 555 570 lift comp nitrous cam. edelbrock performer rmp intake. and 100 NX wet shot.
aod w. 3500 stall 3.73 rear gear
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Old 02-09-2008, 09:09 PM   #3
92GreyGT
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Default RE: would i have to flycut?

I take it you are putting this on a stock short block? If so my guess would be yes but the best way to tell is clay a piston. What heads are you using?
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1992 Mustang GT 3375 lbs. w/driver
DSS 331 AFR 165 heads
Comp Cams XE274HR cam
Trick Flow Track Heat intake
Astro Performance Super T5 4.10 gears
Best time 7.58 @ 90 / 11.89 @ 113
333rwhp 357rwtq
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Old 02-09-2008, 09:11 PM   #4
stamper5.0
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Default RE: would i have to flycut?

using protopline heads...the block is bored .30 over...i have a b cam now...but im putting those heads on and i want a new cam...
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89 hatch.
306 protopline aluminum heads. 555 570 lift comp nitrous cam. edelbrock performer rmp intake. and 100 NX wet shot.
aod w. 3500 stall 3.73 rear gear
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Old 02-09-2008, 09:13 PM   #5
92GreyGT
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Default RE: would i have to flycut?

What pistons did you use? Those heads have 2.02 intakes, correct?
__________________
1992 Mustang GT 3375 lbs. w/driver
DSS 331 AFR 165 heads
Comp Cams XE274HR cam
Trick Flow Track Heat intake
Astro Performance Super T5 4.10 gears
Best time 7.58 @ 90 / 11.89 @ 113
333rwhp 357rwtq
92GreyGT is offline   Reply With Quote
Old 02-09-2008, 09:19 PM   #6
stamper5.0
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Default RE: would i have to flycut?

i have speed pro pistons...and ya i believe its 2.02 intakes
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89 hatch.
306 protopline aluminum heads. 555 570 lift comp nitrous cam. edelbrock performer rmp intake. and 100 NX wet shot.
aod w. 3500 stall 3.73 rear gear
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Old 02-09-2008, 09:23 PM   #7
92GreyGT
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Default RE: would i have to flycut?

Do those pistons have extra valve releifs or are they just stock replacements? If you are going to have the heads off anyway just clay the pistons and see if it'll clear.
__________________
1992 Mustang GT 3375 lbs. w/driver
DSS 331 AFR 165 heads
Comp Cams XE274HR cam
Trick Flow Track Heat intake
Astro Performance Super T5 4.10 gears
Best time 7.58 @ 90 / 11.89 @ 113
333rwhp 357rwtq
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Old 02-09-2008, 09:24 PM   #8
stamper5.0
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Default RE: would i have to flycut?

im not sure....but i can check...idk what u mean by clay the pistons?..
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89 hatch.
306 protopline aluminum heads. 555 570 lift comp nitrous cam. edelbrock performer rmp intake. and 100 NX wet shot.
aod w. 3500 stall 3.73 rear gear
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Old 02-09-2008, 09:31 PM   #9
92GreyGT
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Default RE: would i have to flycut?

Install the new cam, head (using the old head gasket), pushrods on one cylider, and roller rockers. Before you put the head get some modeling clay and put it on top of the piston where the reliefs are. Slowly and gently spin the motor over a couple of revolutions. While you turning the engine over it locks up do not try to force it, that is the piston hitting the valve. If it goes ok take the head off and check to see how thick the clay is where the valve pushed into it. You need .120" on the intake and .080" on the exhaust to be safe.
__________________
1992 Mustang GT 3375 lbs. w/driver
DSS 331 AFR 165 heads
Comp Cams XE274HR cam
Trick Flow Track Heat intake
Astro Performance Super T5 4.10 gears
Best time 7.58 @ 90 / 11.89 @ 113
333rwhp 357rwtq
92GreyGT is offline   Reply With Quote
Old 02-09-2008, 09:34 PM   #10
stamper5.0
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Default RE: would i have to flycut?

alright thats what i thought u meant....the 2 cams arnt that different the duration on the comp cam is small but slip b,c its a nitrous cam...the lift is bogger the the b cam...which one should i be worried about?
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89 hatch.
306 protopline aluminum heads. 555 570 lift comp nitrous cam. edelbrock performer rmp intake. and 100 NX wet shot.
aod w. 3500 stall 3.73 rear gear
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Old 02-09-2008, 09:34 PM
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