El Camino 1970 LS5 360hp when Impala is 390hp, corvette the same


Asked by Jan 24, 2007 at 08:43 PM about the 1970 Chevrolet Chevelle

Question type: General

Same heads, intake, cam, carb.
Where does the extra 30hp come from.

3 Answers


Well, camshats and cam gears can bump a car up 20 hp, but you said that they are the same, however make sure they are tuned. In addition, camshats need a higher static compression piston. The extra 30hp may come from everything working together more smoothly. Even though you have a lot of the same things in both cars, they might not be as well tuned. Also, check the exhaust system.


The 390hp passenger has the same style exhaust manifolds, however the contradiction is the 390hp Corvette may have (unverified) a less restrictive design. The factory rated the 454 LS5 in the Chevelle/ElCamino at 360hp. So with everthing the same why 360hp as opposed to 390hp. Tuning is not the question. Factory rated HP is. I have factory info that it used its own exhaust design when engine was dynoed to determining HP. Ray...


Check the stroke, also sometimes I have heard that the manufactures did not release the true hp for some kind of insurance reasons...the El Camino was not supposed to be a Hot Rod like the Corvette. Now I know an old Toyota is not the same thing but they got different hp ratings from basically the same engine. The 1.1, 1.2, and 1.6 3K engines have all the same parts but the 1.2 has a slightly longer stroke giving it 13 more hp and there is a 3K-B that has 23 more hp by using heavier valve springs letting it go to 6600 rpm's instead of 6000.

Your Answer

Add photo

Related Questions


Looking for a Used Chevelle in your area?

CarGurus has 409 nationwide Chevelle listings and the tools to find you a great deal.


Search Chevrolet Chevelle Questions

Chevrolet Chevelle Experts

#1 Squatt
Reputation 530
#2 LouB
Reputation 260
#3 18TandSVT
Reputation 230
View All

Related Models For Sale

Used Chevrolet Camaro"
814 Great Deals out of 39,044 listings starting at $2,650
Used Chevrolet Corvette"
424 Great Deals out of 20,186 listings starting at $3,688
Used Dodge Challenger"
472 Great Deals out of 25,495 listings starting at $8,000
Used Ford Mustang"
725 Great Deals out of 41,224 listings starting at $900
Used Chevrolet Impala"
892 Great Deals out of 35,540 listings starting at $795
Used Dodge Charger"
671 Great Deals out of 30,154 listings starting at $1,995
Used Chevrolet Nova"
190 listings
Used Chevrolet Monte Carlo"
7 Great Deals out of 2,061 listings starting at $3,850
Used Chevrolet Malibu"
1,104 Great Deals out of 72,186 listings starting at $1,300
Used Pontiac GTO"
11 Great Deals out of 512 listings starting at $5,995
Used Pontiac Firebird"
11 Great Deals out of 893 listings starting at $2,995
Used Chevrolet Caprice"
199 listings starting at $10,900