Re: performance upgrade for mercruiser 4.3L

Steelphoenix

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Apr 21, 2011
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4
Re: performance upgrade for mercruiser 4.3L

I have the 1.6 ratio comp cams magnum Roller rockers on my 4.3 with roller cam and have had no problems with reversion. This is on my 1992 with <br />a edelbrock intake and holley carb.<br /><br />I am waiting until my 2003 is out of warranty to do the same to it.<br />I already have the intake and edelbrock carb.<br />If these mods wake up my newer boat the way they woke up my old one I will be very happy.

Did you have to replace the rocker covers to fit the roller setup?
 

MikDee

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Jun 6, 2007
Messages
4,745
Re: performance upgrade for mercruiser 4.3L

Re: performance upgrade for mercruiser 4.3L

Good info bluewater19! whitedesigns, you might try a Mercruiser exhaust cone, or thru-hull exhaust, I don't know how much it would help, but it sounds more powerful, and Salisbury makes rubber mufflers sounding like glaspacks, if it's too loud for ya? Even tho V8's sound so much better. :)

I put thru-hull on my 20' SeaRay with a 305/228hp Mercruiser V8 and it wasn;t that loud. Then I put thru-hull on my 24' SeaRay Cuddy with a 350/260hp Mercruiser with Salisbury rubber marine mufflers, and it sounded like glaspacks.
 
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