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opinions and advice needed 451 Vortech blower #1487720
08/20/13 11:28 PM
08/20/13 11:28 PM
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Arkansas
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mopartyson Offline OP
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mopartyson  Offline OP
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Need help on what changes would make this work better on the cheap. I've bought and traded myself into a mismatched pill-o-parts.

451 stroker CP flat top forged pistons aprox .015 in the hole manley H beam rods ported and polished 906 heads with stainless valves and Comp #924 springs. Cam motion solid lift 638 lift and 285 duration (ray barton specd cam). Crane 1.5 roller rockers Indy 400-2 max wedge port intake. 950 quick fuel carb and a vortech V-2 supercharger.

Want to keep this on pump gas and kill some cameros! So what changes would ya'll make???

Re: opinions and advice needed 451 Vortech blower [Re: mopartyson] #1487721
08/21/13 02:34 PM
08/21/13 02:34 PM
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Arkansas
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mopartyson Offline OP
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No one has any advice???

Re: opinions and advice needed 451 Vortech blower [Re: mopartyson] #1487722
08/21/13 02:57 PM
08/21/13 02:57 PM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
You are probably going to need to get some thick cometic gaskets. Any idea what compression you'll have w/ standard head gaskets? What converter and gear? That cam in a N/A motor would probably like 4200+ stall and 4.30's.. with boost you won't need so much. Any idea how much air that head unit can push? I'd expect a pretty big HP gain w/ 8-10psi of boost. I'd probably also run a Snow Performance meth/H2O injection kit.


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Re: opinions and advice needed 451 Vortech blower [Re: Mr.Yuck] #1487723
08/21/13 03:09 PM
08/21/13 03:09 PM
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Arkansas
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mopartyson Offline OP
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Blower has 12psi pulley on it. It is a small blower think it will push 1050cfm. Have a 9" converter 3500. Rear gear prob be 4.10. With open camber heads and the pistons below deck I'm guessing around 9:1. The chambers in the heads have also been polished. Got this blower in a trade, wish it were bigger

Re: opinions and advice needed 451 Vortech blower [Re: mopartyson] #1487724
08/21/13 03:39 PM
08/21/13 03:39 PM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
I think you'd be happier w/ lower gears.. maybe 3.73's or 3.91's. Is that a blower cam? If not you might want to yank it and get one. Be careful when you first set it up timing wise I think you might have more than 9:1, maybe somebody with that desktop thing can figure it out.

Re: opinions and advice needed 451 Vortech blower [Re: Mr.Yuck] #1487725
08/21/13 04:09 PM
08/21/13 04:09 PM
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Arkansas
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mopartyson Offline OP
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Found a compression calculator. Close to 9.5:1. I'm not finding a cometic gasket thick enough for a significant compression drop. Did find a copper gasket .080 thick which would bring it to 8.8:1. Cam is not a blower cam.

Re: opinions and advice needed 451 Vortech blower [Re: mopartyson] #1487726
08/21/13 04:43 PM
08/21/13 04:43 PM
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Posts: 3,635
Oakland, MI
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dizuster Offline
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Oakland, MI
If you're trying to do it on the cheap, put it together and let it rip. 9.5:1 is a little high for pump gas, you'll just have to knock some timing out of it to keep it happy.

Is it all perfect... nope. Will it sill make a bunch of power... yup.

The only thing is the cam a 285@.050" lift? If so that is huge. If the blower is really small, you're going to have to keep the RPM of the engine down. A 1050cfm blower won't keep up with a 451" motor to high RPM.

Call vortech and ask them what kind of RPM this blower will support on a 451" engine. Buy a cam to match, and let it rip.

Re: opinions and advice needed 451 Vortech blower [Re: dizuster] #1487727
08/21/13 05:18 PM
08/21/13 05:18 PM
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Posts: 36
Arkansas
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mopartyson Offline OP
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All this is goin in a 71 valiant. Figured that cam would be a no go. I've read of people having trouble out of the copper gaskets on the street.

Anyone want to throw a guess on what kind of power this thing will make?? I'll prob have a custom ground cam.







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