How do I get ~450hp out of Merc 454 -95?
08-25-2004, 12:41 PM
#21
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Re: How do I get ~450hp out of Merc 454 -95?
Anyone know if a 174 would work on a motor with 9.25 CR? It does have forged TRW's and Ferrea superalloy (not inconnel) valves. Cam is slightly larger than a magnum cam - 112 LSA, 229/239 dur, around .525 lift if I recall correctly. Stock exhaust with silent choice. Boat weighs around 4200 lbs.
08-25-2004, 02:49 PM
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Re: How do I get ~450hp out of Merc 454 -95?
If you get a good set of heads,nothing fancy but not the little ones,raise your compression to 9.5:1,put in a cam about 225/235 @.05 with 5.50" lift and some Rev marine or similar exhaust you can have 450hp pretty easy,forged stuff is really not ness. in this range and the cam will kill a little of the compression.
08-25-2004, 08:03 PM
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Re: How do I get ~450hp out of Merc 454 -95?
Tom I just pulled out my receipts! Total cost was $3725.10
Blower marine kit 174 $1975.00
boost gauge 47.14
msd ignition system, dist,box coil rev limit,wires, box bracket, $684.00,
you can save some money here and go with the Performance marine dist, rev limit and wires for $509.00 ready to drop in and allot less wires to hook up! and in my opinion way better! I use this distributer on my 1400 hp gale banks twin turbo BB at 6500 rpm and 25 pounds of boost!
http://www.performancedistributors.com/
throttle bracket 19.95
fuel line, pump,bracket,check valve $250.00
Carb $500.00
8x2.5 flame arst $77.00
hope this helps
Bryan
Blower marine kit 174 $1975.00
boost gauge 47.14
msd ignition system, dist,box coil rev limit,wires, box bracket, $684.00,
you can save some money here and go with the Performance marine dist, rev limit and wires for $509.00 ready to drop in and allot less wires to hook up! and in my opinion way better! I use this distributer on my 1400 hp gale banks twin turbo BB at 6500 rpm and 25 pounds of boost!
http://www.performancedistributors.com/
throttle bracket 19.95
fuel line, pump,bracket,check valve $250.00
Carb $500.00
8x2.5 flame arst $77.00
hope this helps
Bryan
08-26-2004, 08:24 AM
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Re: How do I get ~450hp out of Merc 454 -95?
Love my DUIs, but an ignition upgrade is probably not necessary for a 4psi motor. I've used Tbolt and V6 modules with about 28 total timing.
Stock fuel pump should easily support 450hp.
The 300/330/7.4 has a wimpy oil cooler, definitely upgrade.
The boost pressure and an oil temp guage are really good ideas.
25psi boost! That scres even me!
Gary
Stock fuel pump should easily support 450hp.
The 300/330/7.4 has a wimpy oil cooler, definitely upgrade.
The boost pressure and an oil temp guage are really good ideas.
25psi boost! That scres even me!
Gary
Originally Posted by bpine
Tom I just pulled out my receipts! Total cost was $3725.10
Blower marine kit 174 $1975.00
boost gauge 47.14
msd ignition system, dist,box coil rev limit,wires, box bracket, $684.00,
you can save some money here and go with the Performance marine dist, rev limit and wires for $509.00 ready to drop in and allot less wires to hook up! and in my opinion way better! I use this distributer on my 1400 hp gale banks twin turbo BB at 6500 rpm and 25 pounds of boost!
http://www.performancedistributors.com/
throttle bracket 19.95
fuel line, pump,bracket,check valve $250.00
Carb $500.00
8x2.5 flame arst $77.00
hope this helps
Bryan
Blower marine kit 174 $1975.00
boost gauge 47.14
msd ignition system, dist,box coil rev limit,wires, box bracket, $684.00,
you can save some money here and go with the Performance marine dist, rev limit and wires for $509.00 ready to drop in and allot less wires to hook up! and in my opinion way better! I use this distributer on my 1400 hp gale banks twin turbo BB at 6500 rpm and 25 pounds of boost!
http://www.performancedistributors.com/
throttle bracket 19.95
fuel line, pump,bracket,check valve $250.00
Carb $500.00
8x2.5 flame arst $77.00
hope this helps
Bryan
08-26-2004, 09:01 AM
#27
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Re: How do I get ~450hp out of Merc 454 -95?
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
08-26-2004, 09:31 AM
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Re: How do I get ~450hp out of Merc 454 -95?
I'm no expert, but iron heads & 9.2:1 with a blower doesnt sound too good to me unless you have access to 100+ octane fuel. Keep in mind Merc & Hawk used under 8:1 compression on their 177 blown, 5psi, 454, 525 hp motors.
My $0.02
Gary
My $0.02
Gary
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
08-26-2004, 09:37 AM
#29
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Re: How do I get ~450hp out of Merc 454 -95?
Kind of what I thought, Gary. Just wishful thinking on my part - I've been a little disappointed in the performance of this motor since I built it. Better exhaust, Holley carb, maybe better heads might wake it up, but by then I'm heading down the path of a rebuild, at least with the heads. Oh well, should have built a 502 when I had the chance...
08-26-2004, 09:52 AM
#30
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Re: How do I get ~450hp out of Merc 454 -95?
do a search on dyno's 330's on roids.....505 hp at 5600....
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