How do I get ~450hp out of Merc 454 -95?
08-26-2004, 03:57 PM
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Re: How do I get ~450hp out of Merc 454 -95?
I didn't really count on this kind of interest in this tread...
I thank you all for the all the valuable answers. All I have to do now is to persuade my two "partners" in the boat... But since we have a 350 that we are gonna fix and sell during the winter, that shouldn't be a problem!
It's pretty sad that here in Sweden the 174 costs about $4000 and a new carb is about $650. So Im gonna look around in the states for a good price since the customs and taxes ads about 30% if I import the parts...
The boat makes almost 60 with the 454 and a Mirage 27P, I have to get a 25P to get it up to ~4500rpm. So about 10-15 more I hope... But you never get satisfied!
Thank you all,
Tomas
I thank you all for the all the valuable answers. All I have to do now is to persuade my two "partners" in the boat... But since we have a 350 that we are gonna fix and sell during the winter, that shouldn't be a problem!
It's pretty sad that here in Sweden the 174 costs about $4000 and a new carb is about $650. So Im gonna look around in the states for a good price since the customs and taxes ads about 30% if I import the parts...
The boat makes almost 60 with the 454 and a Mirage 27P, I have to get a 25P to get it up to ~4500rpm. So about 10-15 more I hope... But you never get satisfied!
Thank you all,
Tomas
08-26-2004, 06:03 PM
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Re: How do I get ~450hp out of Merc 454 -95?
Originally Posted by Budman
Can anyone answer my original question? My engine already has about 9.2:1 CR. Is this too high to run a supercharger, even with 93 octane? Would 4 psi of boost be too much for this setup? Is so, do they make pulleys that will reduce boost below 4 psi?
Alternative would be to build a 502 and stay normally aspirated. My current 454 only has about 200 hours on it. It is based on a 2-bolt cast crank motor, but has forged pistons, polished & shot-peened rods with the ARP bolts, ported oval heads (upgraded to 2.19 valves), etc...
Thanks, Tom
Alternative would be to build a 502 and stay normally aspirated. My current 454 only has about 200 hours on it. It is based on a 2-bolt cast crank motor, but has forged pistons, polished & shot-peened rods with the ARP bolts, ported oval heads (upgraded to 2.19 valves), etc...
Thanks, Tom
And Gary you are absolutely correct, that on the 330 upgrade no ignition change is required, but I just love those DUI so much, they are so clean and run so crisp, if my Hummer wasn’t a Diesel I would have one in that as well! Cheers!
