C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Headers and a tune.

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Old Jun 24, 2023 | 09:48 PM
  #41  
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Originally Posted by auburn2
IME back in the 1980s, working on cars from the 1960s and 1970s headers, exhaust and a tune was the easiest and cheapest horsepower available, beating heads, cams and intakes by a wide margin for a lot less $$$.

IME 50hp is a lot to expect from just headers, but I would say 25 is probably a sure thing.

Then you had to just have deal with the headers leaking every 6 weeks ..... which is why I personally never put headers on a car any more.
unfortunately it spun a bearing on the dyno lol so I'll never know.
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Old Jun 25, 2023 | 12:17 AM
  #42  
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Originally Posted by auburn2
IME back in the 1980s, working on cars from the 1960s and 1970s headers, exhaust and a tune was the easiest and cheapest horsepower available, beating heads, cams and intakes by a wide margin for a lot less $$$.

IME 50hp is a lot to expect from just headers, but I would say 25 is probably a sure thing.
That's true on many, if not most cars, but the stock LTx manifolds and exhaust are already good. People who've done before/after haven't gained a lot on these cars from headers.
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