600 horse 4.3 motor help

Keith Meeks

New member
Here we go as I am curious where this ends up. Let me get some popcorn and follow this. Yes as mentioned above the stock block will split a cylinder wall (non filled) from shear pressure (Broke one). Do at least a half fill and save yourself issues down the road. Main caps should also be installed or at least change to studs. I would recommend Vortec heads if you have the funds because the chambers in them work really well. The Brodix heads have a few issues (out of the box) I believe but haven't confirmed that yet but working on it. One more recommendation is if you have a GOOD machine shop local Bush the driver side lifters bore to force more oil to the mains. No expert here just stating what I have learned on my research project (Lunch Money). I still do have that block laying in the shop that I would sell locally if anyone is interested. All four billet main caps, studs, 3/4 fill, bush lifter bores, with a sleeve in #four. It will need the sleeve bored and the block honed for final size.
Bob
Bob,

I’m a new member and new owner. I don’t have any experience with these trucks but have always admired them from the first moment I saw them in the showroom. I’ve always ran naturally aspirated engines. I’m at a handicap on some of the terms used. I see half full and partial full used. Would you mind enlightening me? I decided to ask you as I see you’re a long term member and you seem genuinely interesting keeping people from making a serious error in engine building.
 

proptop

Donating Member
Keith,
I did not fill my first one and it ran a long time but it did split. I also filled my 065 Bowtie block too after we seen how much the bores were moving around during a freshen up. One down side they don't carry as much water and the oil temp does run hotter. I have never over heated one but I also don't drive the big motor around as much as the stock block combo.
Bob
 

Timbo

SyTy Stalker
I put 6k miles on a stock block putting out 660 horsepower. Never cracked the block, but it wasn't strictly used for racing. You will want 4-bolt mains.
 

Keith Meeks

New member
Keith,
I did not fill my first one and it ran a long time but it did split. I also filled my 065 Bowtie block too after we seen how much the bores were moving around during a freshen up. One down side they don't carry as much water and the oil temp does run hotter. I have never over heated one but I also don't drive the big motor around as much as the stock block combo.
Bob

Thank you sir. Any chance this was your truck Sir?



My normal mode of fun. 440 Mopar with Trick Flow too end roller kit. It’s a beast.
 

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Keith Meeks

New member
I put 6k miles on a stock block putting out 660 horsepower. Never cracked the block, but it wasn't strictly used for racing. You will want 4-bolt mains.
Wow. That’s pretty stout. I do eventually want to play with combinations. It looks to be plenty here to choose from. I’m going to want it to be street driven as well as laughing at the occasional mustang and corvette guy as I wave at them as I leave their a**. Lol Thanks for responding.
 

proptop

Donating Member
No Sir it is not. I also agree with Timbo on street driving verses racing. You can put down a good number and then just ride around in it or you can Crack it in the Ass and have fun with it. I do the second and when it breaks and it will find out what went wrong for knowledge and update on the next build. My Syclone is a research platform for a Street rod project that I want to build later in life (if I can ever find the time). My Avatar is the mockup motor that will be in the Street rod. Twin PTE 60/62 Alum Big bore 300 ci Bowtie build. That is why I have been spending so much time on research. Plus it is fun!!!!! In addition there are more guy's on this site that KNOW way more than I do and have been where we all want to go. So pay good attention to them when they post as they have been there and done that.
Thanks,
Bob
 

Attachments

Keith Meeks

New member
No Sir it is not. I also agree with Timbo on street driving verses racing. You can put down a good number and then just ride around in it or you can Crack it in the Ass and have fun with it. I do the second and when it breaks and it will find out what went wrong for knowledge and update on the next build. My Syclone is a research platform for a Street rod project that I want to build later in life (if I can ever find the time). My Avatar is the mockup motor that will be in the Street rod. Twin PTE 60/62 Alum Big bore 300 ci Bowtie build. That is why I have been spending so much time on research. Plus it is fun!!!!! In addition there are more guy's on this site that KNOW way more than I do and have been where we all want to go. So pay good attention to them when they post as they have been there and done that.
Thanks,
Bob
Thanks again Bob. I also love to put my foot in whatever I’m driving. If I’m going to own something that’s fast, I’m going to enjoy it. I’m going to enjoy making it even faster, more LOL. I’ll definitely be paying attention here in the forums to all experienced owners. Have a good one.
 
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