08-22-2019, 10:43 AM | #21 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,593
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Re: VRX460 Magnum
A couple more questions if you don't mind ? Is the VC460 you are using the long rod version with the VC modified cast piston with the flat top ? Which head gasket are you using ? They run from 20 some to sixty thousands.
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08-22-2019, 01:08 PM | #22 | |
Crazy Ole Man
Join Date: Jan 2016
Location: Owego NY
Posts: 2,758
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Re: VRX460 Magnum
Quote:
I normally run a .045-.060 composite head gasket - reason being - moderate compression 9.5/1 I think you have a better head to block seal with only 4 head bolts. I remember reading about blown steel head gaskets, I don't want to write about one. I have to pull the head off - got to replace the valve springs - I'll get some pictures of the head gasket on the head. The combustion chamber is wee small compared to the original head. I don't know what thickness head gaske to use till I can get some better measurements. |
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08-22-2019, 03:10 PM | #23 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,593
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Re: VRX460 Magnum
I was one of the guys that had 2 of the steel head gaskets let go. Using the 60 thous composite for third season with no issues.
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08-25-2019, 05:48 PM | #24 |
Vegas modded 420
Join Date: Jun 2009
Location: West MI
Posts: 15,433
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Re: VRX460 Magnum
BGW wont send me a password reset, I can't get on here from my new PC!
I cut my piston down in a vice with some big V blocks, alum cuts so easy you don't need huge holding if you take it easy. I clamped up near the top where piston is solid, I did not tighten the vice that much (a kurt). Later I ground it down a little more just by putting 123 blocks next to it and magnet held it good enough to take off a few thou. This was cut for the Vegas rod in a 420, .100 or whatever Vegas was saying, it worked great, took a spin today. So I would likely just strap clamp over the skirts on a block you can vice, or get on your angle somehow. Or use the valve trick. Not sure you will get a lot more torque out of it aside from the right cam, header, maybe long intake like I made. With the cheater Vegas cam mine pulls nice at say 3500 up past 5K. But I have no way of knowing if the header and intake make that much difference, on paper they should help. More compression will help torque. But overall everyone spins them faster for more power, given natural aspiration. have to say mine pulls great compared to a stock 420 which was not bad, I was surprised the cheater cam helped that much, I had the 1.3 rockers on there before that. |
08-25-2019, 11:08 PM | #25 | |
Crazy Ole Man
Join Date: Jan 2016
Location: Owego NY
Posts: 2,758
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Re: VRX460 Magnum
Quote:
The Predator 420 Hemi makes 19.8 ft lbs of torque @2500 rpm and has a 34mm exhaust valve and a 38mm intake valve It's said the head already has 1.3 to 1 rockers in it so I have a valve lift in the .338 area with a Vegas torque cam. |
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08-29-2019, 10:55 PM | #26 |
Crazy Ole Man
Join Date: Jan 2016
Location: Owego NY
Posts: 2,758
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Re: VRX460 Magnum
Here's a few pictures of the combustion chamber, it's very small. I have to cc the chamber and see how much more it can be opened up.
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08-30-2019, 12:02 AM | #27 |
Crazy Ole Man
Join Date: Jan 2016
Location: Owego NY
Posts: 2,758
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Re: VRX460 Magnum
The build has started. The first job I'm doing is setting the end play in the crankshaft. Set up a dial indicator on the end of the crank and my end play is about .017. Using shims I bought from ARC I got it down to about .003-.004, that's just a little tight. When I open it to check the cam end play I what to change a shim and get my crankshaft end play at about .007
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08-30-2019, 06:57 AM | #28 |
VC 460 CLONE GONE WILD
Join Date: Oct 2014
Location: Ray BY The Bay NJ
Posts: 10,593
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Re: VRX460 Magnum
I am certainly watching your procedure for when I do mine.
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08-30-2019, 08:54 AM | #29 |
Searching for The Way
Join Date: Oct 2009
Location: Medina, Ohio (NEOHIO)
Posts: 11,421
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Re: VRX460 Magnum
So Shepard, what are your goal with this build? High rpm?
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08-30-2019, 09:42 AM | #30 |
Crazy Ole Man
Join Date: Jan 2016
Location: Owego NY
Posts: 2,758
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Re: VRX460 Magnum
Increased torque @ 3600 rpm. I'm using the VC torque cam, if the rocker arms are a true 1.3-1 ratio the lift will be .338. The original VC 460 had 1.1-1 ratio with the tin rockers - I felt the power increase with the Gage 1.3-1 rockers
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