Bad Memorial day
#33
Banned
Join Date: Oct 2006
Location: Bradenton Florida
Posts: 5,927
Likes: 0
Received 0 Likes
on
0 Posts
#34
VIP Member
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
![Default](/forums/images/icons/icon1.gif)
The 500HP, 540 cube Bulldog did use a Bowtie block and Lunati crank. The stroke is most definitely 4.375. The bore would be around 4.43 to make 540 cube.
I don't think you can put that crank into a standard deck GM block.
I suggest you try and have the block sleeved. Buying a new block is going to be big $$.
It all depends on how much you want to spend on a boat that is for sale.
If you do really want to sell the boat the easiest and least expensive thing to do is buy a "take-out" running engine or buy a shortblock 502.
I don't think you can put that crank into a standard deck GM block.
I suggest you try and have the block sleeved. Buying a new block is going to be big $$.
It all depends on how much you want to spend on a boat that is for sale.
If you do really want to sell the boat the easiest and least expensive thing to do is buy a "take-out" running engine or buy a shortblock 502.
__________________
Patrick
Patrick
#35
VIP Member
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
![Default](/forums/images/icons/icon1.gif)
Here's what I found doing a quick google...
HP500 Bulldog Specifications
Propshaft Horsepower: 470 (350 kw)
Displacement (Liter/CID): 8.9/542
Cylinders: V-8
Bore (in/mm): 4.44/113
Stroke (in/mm): 4.375/111
Compression Ratio: 8.6:1
Fuel Requirements: 87 Posted Octane (R+M)/2
Full Throttle RPM Range: 4800-5200
Ignition Type: Thunderbolt V
Alternator (amps/watts): 55/776
Length (in/mm): 47.5/1207
Width (in/mm): 32.75/648
Height (in/mm): 25.5/648
Weight (lbs/kg): 1540/699
Warranty: 1-year limited, 3-year limited corrosion
HP500 Bulldog Specifications
Propshaft Horsepower: 470 (350 kw)
Displacement (Liter/CID): 8.9/542
Cylinders: V-8
Bore (in/mm): 4.44/113
Stroke (in/mm): 4.375/111
Compression Ratio: 8.6:1
Fuel Requirements: 87 Posted Octane (R+M)/2
Full Throttle RPM Range: 4800-5200
Ignition Type: Thunderbolt V
Alternator (amps/watts): 55/776
Length (in/mm): 47.5/1207
Width (in/mm): 32.75/648
Height (in/mm): 25.5/648
Weight (lbs/kg): 1540/699
Warranty: 1-year limited, 3-year limited corrosion
__________________
Patrick
Patrick
#36
Registered
Thread Starter
Join Date: Jan 2008
Location: LAMARQUE TX
Posts: 221
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
Thanks for the help I took the motor the the engine shop today getting the block sleeved and the heads crank etc all checked out and reballanced
#37
Registered
![](https://www.offshoreonly.com/forums/images/icons/platinum_member_star.gif)
#40
VIP Member
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
![Thumbs up](/forums/images/icons/icon14.gif)
Are you going to put the same cam back in?
If you have a little extra, you may consider bumping the compression and installing a good hydraulic roller cam.
9.5: 1 and a cam simmilar to the 525EFI cam will give you another 50-75HP and still idle around 800rpm.
Good Luck with your project...
__________________
Patrick
Patrick