T O P I C R E V I E W
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99gt-UJSTLST
Member # 584
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posted
well I finally took my 99gt apart and I found why I was only makeing 8psi instead off 18
well I took the heads off my motor and the passanger side had the valves bent again fuck
I thought my timing was off but afthere checkin it out, I found it was fine
I guess I just had way to much lift on my cam's and when it was reved to high RPMs the valves kissed the pistons
Oh well back to the drawing board
Im just goin to dump a stock motor in it meen while I'll save some cash to buy a 5.4l DOHC motor with a automatic
I guess ill part out the 4.6 block and heads
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Teddy Tiger
Member # 2473
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posted
Why not just stroke your 4.6? That's all the real difference between it and a 5.4
Nick
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99gt-UJSTLST
Member # 584
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posted
yea but I can strocker the 5.4 way more then the 4.6
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281n/a
Member # 1465
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posted
that's a common problem on our 46ers fompk cams heard nothing but horror stories.The only safe cams are shm or houston perf
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99gt-UJSTLST
Member # 584
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posted
yea im thinking if I get cams im goin to buy freshly made cams fuck this reground BS
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Synergy Motorsports
Member # 2846
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posted
The SHM cams are good because they are not reground. I have had no problems with those yet. You could always stroke your 281 to make it a 300. Thats what we did with a Saleen. Also, as for over reving that motor will cause the rockers to come off. Thats most likely why you bent the valves. The rockers are way too touchy in this motor.
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99gt-UJSTLST
Member # 584
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posted
quote: Originally posted by Synergy Motorsports: The SHM cams are good because they are not reground. I have had no problems with those yet. You could always stroke your 281 to make it a 300. Thats what we did with a Saleen. Also, as for over reving that motor will cause the rockers to come off. Thats most likely why you bent the valves. The rockers are way too touchy in this motor.
the motor was never over revd hell it was only reved to 5600 rpms on the dynoe
yea i could make it a 300 but their is no replacement for displacement [ May 27, 2003, 03:07 PM: Message edited by: 99gt-UJSTLST ]
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Synergy Motorsports
Member # 2846
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posted
There is also a place in Redwood City that does alot of 4.6 cams all day long. They are called Elgin Cams. Look em up. Good people over there.
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