Freakingstang
is the one with The Magic Ballz
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Vehicle: 2003 Ford Mustang Cobra
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« on: February 20, 2005, 02:48:13 PM » |
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Looking for some feedback on The GT-40 Y303 heads. I might be picking up a set cheap. I dont want them if they don't perform better than my ported iron Gt-40's. Thanks
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Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe 
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speedfreak87
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« Reply #1 on: February 20, 2005, 02:56:37 PM » |
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you and my friend Dave must be going after the same heads.. he asked me about y-303'd earlier today...
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FiveOfastback
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Posts: 13
Vehicle: 1967 Ford Mustang GT
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« Reply #2 on: February 20, 2005, 05:16:26 PM » |
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You asking about the crate motor aluminum heads? The only problem I see with them for a good street motor is compression. They also have pedastal mount rockers which are not the strongest . They do make pretty good horsepower right out of the box though. I beleive there are to different sizes for combustion chambers I think it is 58 cc and 64cc . Good luck I don't think you could go wrong though on a street motor.
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67 Mustang F/B 302 GT-40X FMS engine RPM Air Gap 650 BG CLAW Crane 1.7 rollers ceramic coated headers T5, cable clutch Magna flow X pipe 3.89 9". Clearwater Aqua GT Clone Vintage 40 series 16X8 225 front 245/50 rear 13.11 @ 111mph 69 Boss 302 65k original miles Acapulco blue Resto project
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speedfreak87
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« Reply #3 on: February 20, 2005, 07:14:29 PM » |
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the ped mounts can be converted to stud mount.. I'm doing that on my GT40P's.
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Freakingstang
is the one with The Magic Ballz
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« Reply #4 on: February 20, 2005, 07:14:49 PM » |
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These are a local deal, so Joe unless your buddy lives in Ohio...Differant heads.
These have studs, not pedestals. Whats the differance bewtween the X heads and the Y heads?
They were on the car when he bought it. He said they were Y heads, but they have studs and he's never touched them. He stepped up to AFR's and doesn't need them.
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Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe
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speedfreak87
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« Reply #5 on: February 20, 2005, 07:21:30 PM » |
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These are a local deal, so Joe unless your buddy lives in Ohio...Differant heads. that's one hell of a ka-winkiedink. These have studs, not pedestals. Whats the differance bewtween the X heads and the Y heads? the difference? two different letters in the alpha.  They were on the car when he bought it. He said they were Y heads, but they have studs and he's never touched them. He stepped up to AFR's and doesn't need them. I would buy them anyway... if you can't use them you can always sell them for probably more then what you paid fi he's cutting you a deal. |
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Freakingstang
is the one with The Magic Ballz
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« Reply #6 on: February 20, 2005, 07:31:42 PM » |
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Thinking along the same lines, I mean for 400 bucks I can't go wrong!
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Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe
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87cobra
Proud Canadian Woot!!
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Ontario, Canada
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« Reply #7 on: February 20, 2005, 11:06:38 PM » |
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sounds like a deal to me
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Faster Is The Only Way To Go, None Of That Ricer s***!!
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stang-fan69
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Posts: 176
If it has tits or wheels, it gives you problems
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« Reply #8 on: February 21, 2005, 03:28:45 AM » |
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Does anybody know the valve sizes used in this heads?
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Regards from Germany
Andy
69 Mustang Grande 351W
93 VW Golf GT (daily)
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speedfreak87
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« Reply #9 on: February 21, 2005, 06:26:15 AM » |
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Thinking along the same lines, I mean for 400 bucks I can't go wrong!
s***.. I would get them for $400... that's a friggin theft job.. |
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Aussie XAXB
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« Reply #10 on: February 21, 2005, 07:46:25 AM » |
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X305 (58cc) X303 (64cc) heads have 1.94" Intake and 1.54" exhaust valve diameters.
Intake flows approximately 240 cfm at .550" lift
Exhaust flows approximately 170 cfm at .500" lift
Intake port volume 178cc, exhaust port volume 62cc
Y303 heads have 1.94" intake and 1.54" exhaust valve diameters.
Improved air flow over original GT-40 cast iron and production heads (no spec)
Intake port volume 160cc, exhaust port volume 53cc
Both have this note...."Will not fit 1986 5.0L with flat-top pistons unless pistons are notched for valve relief"
For $400 bucks I would take them.
Steve
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Freakingstang
is the one with The Magic Ballz
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« Reply #11 on: February 21, 2005, 07:17:08 PM » |
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Going to pick them up right now. It is about an hour away, so I'll let you know what I come up with!!!!
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Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe
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speedfreak87
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« Reply #12 on: February 22, 2005, 05:20:53 AM » |
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pics.. post them..
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Freakingstang
is the one with The Magic Ballz
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Vehicle: 2003 Ford Mustang Cobra
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« Reply #13 on: February 22, 2005, 11:23:16 PM » |
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I scored them with rockers too!!!! Gone until SAturday for work. Stuck in Cincy, OHio!!!!
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Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe
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