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  #1  
Old 07-19-2005, 11:13 AM
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best heads

what are the best heads to put on my 1992 stock 4.6l for my grand maquis just looking for something more high performance
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THE 92 grand marquis LS M75 with the 281 romeo v8 u cant mess with that
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Old 07-20-2005, 01:21 AM
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Re: best heads

Renagade Racing Ported NPI (stock) heads from a '95-'00 4.6/5.4L, w/"PI" cams. Should be more than enough to destroy your trans.
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Old 07-20-2005, 04:13 PM
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Re: best heads

what is a pi cam?
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Old 07-20-2005, 10:46 PM
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in this case i think it means plice interceptor im not sure
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THE 92 grand marquis LS M75 with the 281 romeo v8 u cant mess with that
MODS: dynomax bullit exhaust, custom intake, polished upper plenum, 180T-stat, accel coil packs and platnum plugs

also 2005 crysler sebring sedan walter p crysler edition yea its got the 2.4 pics comin soon
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Old 07-21-2005, 02:18 PM
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so ur saying i should go to the junk yard and get my self some stock heads from a 95 crown vic/ grand marquis with the 4.6?
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THE 92 grand marquis LS M75 with the 281 romeo v8 u cant mess with that
MODS: dynomax bullit exhaust, custom intake, polished upper plenum, 180T-stat, accel coil packs and platnum plugs

also 2005 crysler sebring sedan walter p crysler edition yea its got the 2.4 pics comin soon
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Old 07-22-2005, 01:13 AM
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Re: Re: best heads

Quote:
Originally Posted by ModMech
Renagade Racing Ported NPI (stock) heads from a '95-'00 4.6/5.4L, w/"PI" cams. Should be more than enough to destroy your trans.
he is telling you to take some 'stock' '95-'00 heads; and to find some 'pi' cams. in this case pi = performance improved. this will raise your compression, flow, and horsepower enough to make you happy.... or destroy your tranny.

just make sure your tranny is sound, and you do frequent tranny flushes!
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Old 07-22-2005, 10:24 AM
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thanks big j as always ur alot of help another ? will they be direct fit with my intake and exhaust manifolds?
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THE 92 grand marquis LS M75 with the 281 romeo v8 u cant mess with that
MODS: dynomax bullit exhaust, custom intake, polished upper plenum, 180T-stat, accel coil packs and platnum plugs

also 2005 crysler sebring sedan walter p crysler edition yea its got the 2.4 pics comin soon
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Old 07-22-2005, 11:42 AM
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Re: best heads

will a new racing cam really make that much of a difference??
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Old 07-22-2005, 02:04 PM
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Re: best heads

What he was saying is a set of 95-2000 model heads (Non Police interceptor) ported and modified by renegade racing, with the police interceptor cams installed.
Yes a higher lift and duration cam will make a huge difference, especially with the porting modification to support it.
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Old 07-22-2005, 09:14 PM
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Re: Re: best heads

Quote:
Originally Posted by jimmytroanoke
What he was saying is a set of 95-2000 model heads (Non Police interceptor) ported and modified by renegade racing, with the police interceptor cams installed.
Yes a higher lift and duration cam will make a huge difference, especially with the porting modification to support it.
It is NOT Police .....

It is PERFORMANCE IMPROVED .
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Old 07-23-2005, 01:49 PM
fbi-interceptor fbi-interceptor is offline
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Re: best heads

yes modmech you are correct!! there is no suck thing as a police interceptor cam. all the 4.6 motors have the same overhead cam 93 and up i believe.
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Old 07-24-2005, 01:27 AM
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Re: Re: best heads

Quote:
Originally Posted by fbi-interceptor
yes modmech you are correct!! there is no suck thing as a police interceptor cam. all the 4.6 motors have the same overhead cam 93 and up i believe.

nope
92-95, 96-00, 01-present; 3 different cams/heads

then again maybe 95 had the same as 96, i can't remember...

either way, 01 and up were 'pi'. performace improved.
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Old 07-24-2005, 01:44 PM
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Re: best heads

ok then whats the difference in horsepower between a 93 and say a 2001?
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