need help identifying heads and manifold
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 1,028
Likes: 0
From: San Antonio Texas
need help identifying heads and manifold
need forum members help. 79 L82 BUT modified with aluminum heads and aluminum intake manifold.
part numbers
manifold - 14007378 with the letters GMCM underneath
heads - 14100128 with the letters F2 above and SR below.
are these both GM parts??? what spark plugs should be used with these heads? gap? (i'm running MSD digital 6 ignition also), headers with true dual exhaust, no pollution controls. what kind of compression should i be getting? HP estimate?
thanks for any and all info.
part numbers
manifold - 14007378 with the letters GMCM underneath
heads - 14100128 with the letters F2 above and SR below.
are these both GM parts??? what spark plugs should be used with these heads? gap? (i'm running MSD digital 6 ignition also), headers with true dual exhaust, no pollution controls. what kind of compression should i be getting? HP estimate?
thanks for any and all info.
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 1,028
Likes: 0
From: San Antonio Texas
i don't either. they are aluminum and i'm not aware of any aluminum on any late C3 engines. i thought L82 had cast iron manifold. mine is aluminum. how can i determine what the heads are from. is there a publication or website for these number?
Instructor
Joined: Nov 2004
Posts: 199
Likes: 1
From: League City Texas
Ghost - I'm not sure you got the right head #, I'm showing14101128 GM. This # is 86-87 Alum.- 58cc angle plug.
350. Go to www.mortec.com for accurate chevy casting #'s
350. Go to www.mortec.com for accurate chevy casting #'s
Thread Starter
Burning Brakes
Joined: Nov 2004
Posts: 1,028
Likes: 0
From: San Antonio Texas
o.k. i did it the hard way. went to barnes and nobles and looked it up in the chevy small block parts interchange manual.
the book only has a one line entry. it says 14101128 are
86-87 aluminum, 58cc, angle plug heads.
can anybody tell me what the recommended spark plug for this head would be??
also, what compression ratio should i expect. and is there anything special or unusual about angle plug heads? why are they made that way?
the book only has a one line entry. it says 14101128 are
86-87 aluminum, 58cc, angle plug heads.
can anybody tell me what the recommended spark plug for this head would be??
also, what compression ratio should i expect. and is there anything special or unusual about angle plug heads? why are they made that way?
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Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
Originally Posted by greyghost79
i don't like the low end, but the mid range rocks (2500 to 5000 rpm seems to be the sweet spot).
Le Mans Master
Joined: Mar 2002
Posts: 7,456
Likes: 2
From: Coming home from Luckenbach Texas
That has more to do with the original L82 cam than the replacement heads. The L82 doesn't wake up until it gets over 2000 rpm -- a good candidate for a higher stall converter (I have a 2200 stall unit).
The L98 heads were designed with TPI in mind. They have 58cc chambers (thanks to knock sensors it became possible), but they don't flow very well, nor do they have any features of the later Vortec heads. Basically an aluminum version of the classic stock small block head.
On the plus side, your engine is now an excellent candidate for a TPI swap.
The L98 heads were designed with TPI in mind. They have 58cc chambers (thanks to knock sensors it became possible), but they don't flow very well, nor do they have any features of the later Vortec heads. Basically an aluminum version of the classic stock small block head.
On the plus side, your engine is now an excellent candidate for a TPI swap.
