Trying to make 450hp
09-20-2011, 11:28 PM
#1
Registered
Thread Starter
Join Date: Sep 2011
Location: Mobile Al
Posts: 64
Likes: 0
Received 0 Likes
on
0 Posts
Trying to make 450hp
What gm head castings and valve sizes?
What cast iron intake?
What cam?
With 9.0-1 to 9.2-1 CR does it take to make 450hp with a .030 over 454 mark IV
I will be running emi manifolds wet risers through hull. And a 800 Holley DP. Or is this possible? Just don't want to build a pig. I have the block/ rods/ crank ready to go. Just need to know what heads so I can order my pistons.
Thanks Aaron
What cast iron intake?
What cam?
With 9.0-1 to 9.2-1 CR does it take to make 450hp with a .030 over 454 mark IV
I will be running emi manifolds wet risers through hull. And a 800 Holley DP. Or is this possible? Just don't want to build a pig. I have the block/ rods/ crank ready to go. Just need to know what heads so I can order my pistons.
Thanks Aaron
09-22-2011, 09:32 AM
#2
Registered
iTrader: (3)
Ill make it really easy for you. Engine masters just did a 454HO buildup for a marine app.
Stock 454 shortblock, 236/242* hyd roller cam, dart 310 aluminum pro 1 heads, dart single plane intake, holley 1000 hp 4150. Engine made 525HP@5600RPM, and kept pulling to 6000 making power. 517FT lbs at 4800.
Only thing I might do different, is a little less cam duration, and a little more lift than the one they used. That should bring the peak HP down to around 5300-5400.
Stock 454 shortblock, 236/242* hyd roller cam, dart 310 aluminum pro 1 heads, dart single plane intake, holley 1000 hp 4150. Engine made 525HP@5600RPM, and kept pulling to 6000 making power. 517FT lbs at 4800.
Only thing I might do different, is a little less cam duration, and a little more lift than the one they used. That should bring the peak HP down to around 5300-5400.
09-22-2011, 09:44 AM
#4
Registered
iTrader: (3)
Ill make it really easy for you. Engine masters just did a 454HO buildup for a marine app.
Stock 454 shortblock, 236/242* hyd roller cam, dart 310 aluminum pro 1 heads, dart single plane intake, holley 1000 hp 4150. Engine made 525HP@5600RPM, and kept pulling to 6000 making power. 517FT lbs at 4800.
Only thing I might do different, is a little less cam duration, and a little more lift than the one they used. That should bring the peak HP down to around 5300-5400.
Stock 454 shortblock, 236/242* hyd roller cam, dart 310 aluminum pro 1 heads, dart single plane intake, holley 1000 hp 4150. Engine made 525HP@5600RPM, and kept pulling to 6000 making power. 517FT lbs at 4800.
Only thing I might do different, is a little less cam duration, and a little more lift than the one they used. That should bring the peak HP down to around 5300-5400.
09-22-2011, 09:47 AM
#5
Registered
iTrader: (3)
What gm head castings and valve sizes?
What cast iron intake?
What cam?
With 9.0-1 to 9.2-1 CR does it take to make 450hp with a .030 over 454 mark IV
I will be running emi manifolds wet risers through hull. And a 800 Holley DP. Or is this possible? Just don't want to build a pig. I have the block/ rods/ crank ready to go. Just need to know what heads so I can order my pistons.
Thanks Aaron
What cast iron intake?
What cam?
With 9.0-1 to 9.2-1 CR does it take to make 450hp with a .030 over 454 mark IV
I will be running emi manifolds wet risers through hull. And a 800 Holley DP. Or is this possible? Just don't want to build a pig. I have the block/ rods/ crank ready to go. Just need to know what heads so I can order my pistons.
Thanks Aaron
09-22-2011, 10:04 AM
#6
Registered
iTrader: (4)
Ill make it really easy for you. Engine masters just did a 454HO buildup for a marine app.
Stock 454 shortblock, 236/242* hyd roller cam, dart 310 aluminum pro 1 heads, dart single plane intake, holley 1000 hp 4150. Engine made 525HP@5600RPM, and kept pulling to 6000 making power. 517FT lbs at 4800.
Only thing I might do different, is a little less cam duration, and a little more lift than the one they used. That should bring the peak HP down to around 5300-5400.
Stock 454 shortblock, 236/242* hyd roller cam, dart 310 aluminum pro 1 heads, dart single plane intake, holley 1000 hp 4150. Engine made 525HP@5600RPM, and kept pulling to 6000 making power. 517FT lbs at 4800.
Only thing I might do different, is a little less cam duration, and a little more lift than the one they used. That should bring the peak HP down to around 5300-5400.
09-22-2011, 10:05 AM
#7
09-22-2011, 11:04 AM
#8
Registered
iTrader: (4)
Wouldn't an old Merc 420 spec engine with a nice hydraulic roller cam get you in the ballpark or a little more?? You could still use the GM rectangle heads and save $2000 over going with aftermarket heads. If you were going after market heads I would also go with the Darts.
09-22-2011, 04:51 PM
#10
Registered
iTrader: (1)
What gm head castings and valve sizes?
What cast iron intake?
What cam?
With 9.0-1 to 9.2-1 CR does it take to make 450hp with a .030 over 454 mark IV
I will be running emi manifolds wet risers through hull. And a 800 Holley DP. Or is this possible? Just don't want to build a pig. I have the block/ rods/ crank ready to go. Just need to know what heads so I can order my pistons.
Thanks Aaron
What cast iron intake?
What cam?
With 9.0-1 to 9.2-1 CR does it take to make 450hp with a .030 over 454 mark IV
I will be running emi manifolds wet risers through hull. And a 800 Holley DP. Or is this possible? Just don't want to build a pig. I have the block/ rods/ crank ready to go. Just need to know what heads so I can order my pistons.
Thanks Aaron
.30 over 454 (365 mag origin)
Dart 308's
Comp XM-270h-12 cam
AirGap intake
HP 500 Carb
IMCO EXHAUST MANIFOLDS
453 HP @ 5500
505 TQ @ 4300
