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12-16-2011, 05:32 PM
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#1
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Senior Member
Join Date: Jul 2008
Posts: 739
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Time to beef up my 4.6
The 4.6 in my GT/CS is pretty much maxed. Any more power and these pencil thin rods will give out. So I'm replacing the shortblock with a fully forged Boss 5.0 shortblock.
Boss iron block
All Arp hardware
Manley forged flat top pistons
Frpp oil pump
Forged Manley H-beam rods
Forged Cobra crank
Federal Mogul rod and main bearings
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HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your ass?
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12-16-2011, 06:39 PM
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#2
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Do the cylinder walls need honing? They look kinda shinny in the pic. 
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12-16-2011, 06:45 PM
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#3
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Senior Member
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Posts: 739
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Quote:
Originally Posted by Vettezuki
Do the cylinder walls need honing? They look kinda shinny in the pic. |
Just the light. The block has been fully machined.
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HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your ass?
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12-16-2011, 10:28 PM
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#4
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pain's fun, hit me again
Join Date: Sep 2009
Posts: 6,264
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Nice, for those of you who dont know. The rods really are pencil thin, they're about the size of a toothbrush handle.
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Originally Posted by Bruce Lee
Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely — lay your life before him
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12-17-2011, 04:02 AM
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#5
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by Shaolin Crane
Nice, for those of you who dont know. The rods really are pencil thin, they're about the size of a toothbrush handle.
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What huh?
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12-17-2011, 04:33 AM
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#6
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pain's fun, hit me again
Join Date: Sep 2009
Posts: 6,264
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Ford cut the weight down on the 3v rods to increase the rpm range. I'll try and find the picture Greg at RET took when he compared his toothbrush to the connecting rod from a 3v engine. They were nearly identical in size.
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Quote:
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Originally Posted by Bruce Lee
Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely — lay your life before him
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12-17-2011, 04:54 AM
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#7
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by Shaolin Crane
Ford cut the weight down on the 3v rods to increase the rpm range. I'll try and find the picture Greg at RET took when he compared his toothbrush to the connecting rod from a 3v engine. They were nearly identical in size.
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I get it from a physics POV. Just wonder about the trade off. On a side note, F1 engine piston heads are more like a valve and the oil only slightly more viscous then water. Of course 18 RPM, 1000s (yes) of gs in direction change and fuel injection around the speed of sound is kind of intense. 
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12-17-2011, 12:59 PM
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#8
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pain's fun, hit me again
Join Date: Sep 2009
Posts: 6,264
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Quote:
Originally Posted by joedls
The 4.6 in my GT/CS is pretty much maxed. Any more power and these pencil thin rods will give out. So I'm replacing the shortblock with a fully forged Boss 5.0 shortblock.
Boss iron block
All Arp hardware
Manley forged flat top pistons
Frpp oil pump
Forged Manley H-beam rods
Forged Cobra crank
Federal Mogul rod and main bearings
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Did you do any high temp or race moly coating on the rings and bearings?
__________________
Quote:
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Originally Posted by Bruce Lee
Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely — lay your life before him
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12-17-2011, 01:20 PM
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#9
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Senior Member
Join Date: Jul 2008
Posts: 739
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Quote:
Originally Posted by Vettezuki
I get it from a physics POV. Just wonder about the trade off. On a side note, F1 engine piston heads are more like a valve and the oil only slightly more viscous then water. Of course 18 RPM, 1000s (yes) of gs in direction change and fuel injection around the speed of sound is kind of intense. |
The stock rods are good for the power level of the stock engine, some have even run them with over 500 HP to the wheels for some time. Eventually they give out at that power level. My car is pushing 500 RWHP with the race tune, so it's time.
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HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your ass?
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12-17-2011, 02:09 PM
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#10
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pain's fun, hit me again
Join Date: Sep 2009
Posts: 6,264
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Are you running a blower or n/a?
__________________
Quote:
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Originally Posted by Bruce Lee
Forget about winning and losing; forget about pride and pain. Let your opponent graze your skin and you smash into his flesh; let him smash into your flesh and you fracture his bones; let him fracture your bones and you take his life. Do not be concerned with escaping safely — lay your life before him
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