New Engines: 557 or 572
10-17-2006 | 07:43 PM
#31
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
Re: New Engines: 557 or 572
Originally Posted by mikes280
yes that is 400 long but you can go longer
We also had to go .030 over due to some tapers in the bores so I'm actually at 580 cu in.
Last edited by Panther; 10-17-2006 at 07:48 PM.
10-17-2006 | 07:51 PM
#33
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
Re: New Engines: 557 or 572
Originally Posted by mikes280
there is more to running a dish piston then just for compression with a blower motor you did the right thing
10-17-2006 | 08:05 PM
#36
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Joined: Feb 2001
Posts: 1,849
Likes: 1
From: charlotte nc.
Re: New Engines: 557 or 572
Originally Posted by DONZI
Wouldn't the growing popularity of the 557 vs 572 be a piston speed issue ?
4.375 stroke equalling more durability & reliability ?
4.375 stroke equalling more durability & reliability ?
10-17-2006 | 08:06 PM
#37
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Joined: May 2004
Posts: 1,783
Likes: 3
From: Slidell,Louisiana
Re: New Engines: 557 or 572
I have run 4.600 bore -4.500 stroke for over 8 yrs with no less
than 6800 chips. It all depends on the height of the block,length of the rod,and pin placement in the piston.
I will run my power for how long it takes.If you want to run a larger enough cam solid rollers are the only option.
I don't get it some times and I know it drives engine builder's
nuts.Power boaters will spend days or big $ on detailing ,but taking a couple of hours to run through the valves or at least an inspection is out of the question.Its cheap insurance in my book,I like to pull the valve covers after every hard run.
Big """ would be my choice just depends on the combination
your looking for. Good luck I'm a little envious that your building spares.
than 6800 chips. It all depends on the height of the block,length of the rod,and pin placement in the piston.
I will run my power for how long it takes.If you want to run a larger enough cam solid rollers are the only option.
I don't get it some times and I know it drives engine builder's
nuts.Power boaters will spend days or big $ on detailing ,but taking a couple of hours to run through the valves or at least an inspection is out of the question.Its cheap insurance in my book,I like to pull the valve covers after every hard run.
Big """ would be my choice just depends on the combination
your looking for. Good luck I'm a little envious that your building spares.
10-17-2006 | 08:34 PM
#38
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Joined: Dec 2000
Posts: 6,283
Likes: 1
From: EASTON MA.
Re: New Engines: 557 or 572
MAY I please ask a question I have a 502 30 over so it's a 510? or 509? next time I freshin up what would be a good stroker set up what size crank and rods? I HAVE MERLIN 310 R M HEADS ON IT . CAN IT BE BUILT TO 540 550CI'S. THANK YOU ART 
10-17-2006 | 08:41 PM
#39
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Joined: Sep 2002
Posts: 734
Likes: 1
From: hammonton N.J.
Re: New Engines: 557 or 572
Originally Posted by Panther
I run a 6.70 rod in mine but we needed to order custom pistons cause we couldn't find a dished piston to bring down compression for the blower. Lunati said we could have ordered a flat top piston for a 6.70 rod but we would have needed to mill a dish into the piston and I didn't want to do that.
We also had to go .030 over due to some tapers in the bores so I'm actually at 580 cu in.
We also had to go .030 over due to some tapers in the bores so I'm actually at 580 cu in.
10-17-2006 | 08:47 PM
#40
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Joined: Mar 2004
Posts: 2,697
Likes: 93
From: Pa
Re: New Engines: 557 or 572
Originally Posted by AIR TIME
MAY I please ask a question I have a 502 30 over so it's a 510? or 509? next time I freshin up what would be a good stroker set up what size crank and rods? I HAVE MERLIN 310 R M HEADS ON IT . CAN IT BE BUILT TO 540 550CI'S. THANK YOU ART
