More Power from 5.7 EFI Volvo?

[Cobalt 220]

Just wondering if anyone has had any experience with power upgrades on the EFI 350cuin Volvo. I know the motor is essentially the same as the Merc. The drive is the Volvo Duo-Prop, which I belive is a pretty stout unit. It's installed in my '94 Cobalt 220.<br /><br />Base HP is around 260. I'd sure like to see if I could get it up around 300 - 325. I figure a cam/rocker swap would be the best starting place. After that I assume better heads and exhaust mods could be considered. I currently have outdrive exhaust. I'm wondering if a thru-hull system would be substancially better. What's the initial best bang for the buck.<br /><br />Anyone know where I can get a volvo PROM recalibrated? I assume I'll need to do that if I up the power.

 

[snapperbait]

Re: More Power from 5.7 EFI Volvo?

Well, you could go with all the trouble of swaping cams, heads, and don't forget it has to breathe so a high flow flame arrestor and full on exhaust is in order...<br /><br /> http://www.cpperformance.com/products/default.htm <br /><br />Why not supercharge it?..<br /> http://www.whipplesuperchargers.com/products.asp <br /><br /> http://www.boatworks.net/pc/pc.htm

 

[Dhadley]

Re: More Power from 5.7 EFI Volvo?

You are absolutly correct about the reprogramming. Contact Tom or Jack at Flagship Marine at 800-282-2840 before you do anything.<br /><br />Good luck!