How can I make my 1977 L48 4 speed faster?
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How can I make my 1977 L48 4 speed faster? - 4/8/2006 9:53:04 PM
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leeboy66
Posts: 2
Joined: 4/8/2006
Status: offline
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I want to make my 1977 L48 4 speed faster!! The car is completely stock and I want to make some changes. What modifications should I do first? I was thinking of getting headers and a true dual exhaust first, but I'm not sure if that will make much of a difference in horsepower. My car has a stock 3:36 rear and I was thinking of getting a 3:70. What mods would increase horsepower the most.
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RE: How can I make my 1977 L48 4 speed faster? - 4/8/2006 10:22:23 PM
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wrwalke
Posts: 392
Joined: 11/1/2005
Status: offline
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Hmmm... Personally, I like keeping the original lump (engine) in one piece,
preferrably on a pallet if you have room. Rather than bolting on alot of
stuff and taking a chance at getting the balance of the engine (balance as
in fuel-air-combustion-timing-crank), I like dropping in crate engines.
There are some *great* small block options in the 300-400 hp range
with 300-400 ft-lbs of torque to be had for around $2k to $4k.
I was just considering a GM performance crate lump for my 81. The
6.0 liter GTO engines are nice, as are the Hummer gen-iii and the
c5 corvette engines. A carbeureted "more original" lump from one
of the speed shops that deals with edelbrock or GM performance is a
great place to start looking.
If that doesn't tickle your fancy, and you'd rather go pieces and parts
a bit at a time, Edelbrock is a great place to start. They will tell you
which pieces to replace in what order to gain XX horsepower and YY
torque. They are great to work with!
bill.
(81 C3, all original with 219k miles and counting)
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RE: How can I make my 1977 L48 4 speed faster? - 4/9/2006 6:04:42 PM
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corvette king
Posts: 1162
Joined: 3/5/2006
From: deltona fl, 32738
Status: offline
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YOU ARE GOING TO GET A LOT OF ADVICE ON THIS TOPIC.ME I WOULD START WITH THE HEADS, A GOOD SET OF ALUMINUM HEADS,THEN SOME ROLLER ROCKERS,THEN A INTAKE MANIFOLD,[AIR GAP],THEN A MILD CAM ,THEN I WOULD GET RID OF THAT QUADRAJET CARB AND GET A HOLLY,650 DUBBLE PUMPER,SET OF HOOKER SUPERCOMP HEADERS,AND SOME 3 CHAMBER FLOWMASTERS. AND SOME 373 GEARS ,AND THAT WILL GIVE YOU SOMTHING TO SMILE AT.,
HOPE THIS HELPS...PS I WOULD RUN TRICK FLOW R SERIES HEADS
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