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View Full Version : 1990 454 king cobra engines horsepower???



Jaimeav
12-11-2011, 06:24 PM
:cool!:What is the standard horsepower on a 1990 Z-33 454 King Cobra engines?

BUIZILLA
12-11-2011, 06:41 PM
I think it was 350hp, could have been 365hp
I know the 460 Ford was 340hp

biggiefl
12-12-2011, 01:06 PM
My 90/91 brochure states 330 as standard and 370 as optional. No mention of a 460 ford. These would equate to todays 310 and 350hp versions.

BUIZILLA
12-12-2011, 01:38 PM
My 90/91 brochure states 330 as standard and 370 as optional. No mention of a 460 ford. These would equate to todays 310 and 350hp versions. does it mention in your brochure if the 330 - 370 setup was Merc-Bravo?

I am remembering the OMC version 454 was different ratings, at least my '92 454 OMC was that I owned

I am positive the 460 Ford was 340hp

the later 310hp (owned one of those) Merc is a peanut port whereas the 330hp(owned a couple of those) Merc was a larger oval port, the 350hp(owned a couple of those) was always an oval port (same as Crusader 350hp) but the 370hp Merc(never owned that) was always a rect port

Merc and OMC played advertiser games for 20 years as did Crusader but in the end they were virtually the same longblocks

funny thing with Merc... the 330/TRS rating had inboard style log manifolds and the 340 or 350hp inboard had center risers... 330 Bravo had center risers... 370-390-400-420-440-450 all had center risers

goofy stuff

Barry Eller
12-12-2011, 05:20 PM
My 1993 OMC King Cobra original engine was the 454 HO. 365 HP. rectangular port heads and 850cfm holley 4150 carb.

Jaimeav
12-13-2011, 09:00 AM
Thank you guys for the info. Let me include a few pictures that might help you identify the engines...691606916169162

BUIZILLA
12-13-2011, 09:10 AM
The standard 454 had 330HP the HO 454 came with 360HP. One sign is the HO came with a Holley Carb part # 8010. The other difference was the 330HP had 8.2 to 1 compression the HO had 8.7 to 1, hope this helps. > got this from a 2005 post on OSO

you might check the files at sterndrive.com as well

Jaimeav
12-13-2011, 10:07 AM
Thanks BUIZILLA. I'll look it up...

biggiefl
12-13-2011, 01:58 PM
Bui...they were Cobra drives, no Merc.

Sweet 16: 4.3L 175hp or Ho 205hp--cobra drive
18 Classic 2+3: 350 260hp cobra, 270hp King Cobra
22Classic: 350 270hp King Cobra, 454 330hp King, & 370hp HO King Cobra

All the boats listed in that brochure were GM powered Cobra or King Cobra drives. Not sure when they started or stopped with the 460. If memory serves me, the 370 required thru-hull exhaust.

biggiefl
12-13-2011, 02:05 PM
From the pics it looks like a holley carb. Most Holleys were not painted black like the others.