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What year has the most Horse Power?

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Rick106:
Hi guys

I just wanted to understand which year of C3 has the most horse power as I understand it drops after 1974 from 350hp to 200hp.

Also, is there any way to upgrade/tune a post 1974 model to increase the horsepower?

Cheers,

Rich

demonx:
That would be 1970 for the 350ci which went up to 350hp for the L46 and 370hp for the LT1.

1968 & 1969 427ci which achieved 435hp at its highest combo
1971 had a 454ci which achieved 425hp

The thing to mention is that not all 1971 454's are 425hp, it depends which suffix's etc that car has as there were many different combo's. For ex: 1971 had 5 different 350ci ranging from 270hp to 330hp and 4 different 454ci ranging from 365hp to425hp.

I suggest you jump on ebay and pick up a copy of the "Black Book". Doesnt matter if you buy an old copy as the info for the C3 has not changed. My black book is the 1993 edition but the info for the old cars is still the same and it has all the different engine codes to answer your questions. It's where I copied this data from myself!

69 DIRTY RAT:
68-69 L88s unofficially had 600+hp!, 430hp factory then put on the headers and BANG!

gtc:
Don't get too excited by those pre 1972 hp figures beloved of auto maker marketing departments.

Prior to the 1972 model year, American automakers rated and advertised their engines in brake horsepower (bhp), frequently referred to as SAE gross horsepower, because it was measured in accord with the protocols defined in SAE standards J245 and J1995. As with other brake horsepower test protocols, SAE gross hp was measured using a stock test engine, generally running with few belt-driven accessories and sometimes fitted with long tube (test headers) in lieu of the OEM exhaust manifolds. The atmospheric correction standards for barometric pressure, humidity and temperature for testing were relatively idealistic.

Source: Wiki

Jethro:

--- Quote from: demonx link=topic=7892.msg1045938171#msg1045938171 --- "That would be 1970 for the 350ci which went up to 350hp for the L46 and 370hp for the LT1.


--- End quote ---


:banner::banner::banner::banner:Hey, hey, wait on a minute  me 350ci has 350 h.P. option???? in fact in 69 the standard 350ci motor came with two options a 300 H.p. or as in mine a 350 H.P.......:bannana::bannana::bannana::bannana::bannana:

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