5.7, Q-jet vs Holley what makes more power?

tool39

Recruit
Joined
Aug 13, 2003
Messages
4
Can you squeeze more power out of a 5.7 mercruiser by putting a Holley on it? and if so how much? Also what other mods can be made to that engine without compromising reliability?
 

magster65

Commander
Joined
Sep 1, 2002
Messages
2,573
Re: 5.7, Q-jet vs Holley what makes more power?

IMO a holley is one of the better carbs available. You can probably get a tiny bit more power if you go with a holley and fine tune the jetting, power valve and secondary opening rate.
 

Ralph 123

Captain
Joined
Jun 24, 2003
Messages
3,983
Re: 5.7, Q-jet vs Holley what makes more power?

Go to amazon and checkout the book "Small Block Chevy Marine Performance" by Moore. It lays all your options out for you.
 

snapperbait

Vice Admiral
Joined
Aug 20, 2002
Messages
5,754
Re: 5.7, Q-jet vs Holley what makes more power?

EFI my friend... Its the only way to fly, IMO... Offers slightly better power, cold starts no problem, and better fuel economy too...
 
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