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Re: stock 400 build
[Re: Junky]
#835850
10/24/10 09:42 AM
10/24/10 09:42 AM
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Joined: Mar 2005
Posts: 3,145
Central NC
gch
master
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master
Joined: Mar 2005
Posts: 3,145
Central NC
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Quote:
What is a voodoo 60302? I know it's a cam, but what?
Lunati Voodoo cams. 
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Re: stock 400 build
[Re: Junky]
#835851
10/24/10 09:53 AM
10/24/10 09:53 AM
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Joined: Jan 2005
Posts: 1,647
IL
71383beep
top fuel
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top fuel
Joined: Jan 2005
Posts: 1,647
IL
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I agree if the 452's are already cut then I say use em. Notice in my post I said in stock form standing side by side.
I could care less what ANY book says...especially if its from mopar performance. Most of there junk breaks while looking at it because their QC is a joke. The "book" also says stock 383's ran 10:1 compression which is also a bunch of bull. I will gladly line up my boat anchor equipped mild built 383 to a mild non decked 383 with OC heads ANY DAY. Books are meaningless to real world experience and I have been there with this issue. Label anything you want with your fart in the wind nonsense...compression does matter and there is a world of difference between 7.8:1 and 9.2:1.
IF the 452 heads are properly milled to basically a CC design then yes I agree the 452's are a better port design and therefore should make more power. This is rare though because it requires A lot of head work and also requires intake decking and different pushrods too. It is not the normal route for a cheap rebuild.
I don't hang onto any open chamber heads...unless I need to prop a door open or...anchor my boat!
'73 GK6 Challenger Rallye - 340 4-Speed
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Re: stock 400 build
[Re: gch]
#835853
10/24/10 12:03 PM
10/24/10 12:03 PM
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Joined: Jan 2003
Posts: 5,186
Wherever I am.
Junky
master
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master
Joined: Jan 2003
Posts: 5,186
Wherever I am.
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Quote:
Quote:
What is a voodoo 60302? I know it's a cam, but what?
Lunati Voodoo cams.
I mean, what's the specs?
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Re: stock 400 build
[Re: Junky]
#835854
10/24/10 12:22 PM
10/24/10 12:22 PM
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Joined: Jan 2003
Posts: 3,575
The Netherlands
BigBlockMopar
master
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master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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With those pistons still being a mile down in the holes it doesn't really matter what kinda lump of iron you put on there, it will still be a dog. In this stage I think compression ratio makes more power than headflow. I agree with the '71bee here that in stock form I take a closed chamber head anytime over an open chamber smoghead. There's more than just this .5 point of compression gain. With proper 0-deck (dished) pistons there's also quench-effect to be achieved. In true redneck style one could ofcourse put a .100" slab of JB weld on the pistons to increase the CR a bit... 
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Re: stock 400 build
[Re: Junky]
#835855
10/24/10 01:13 PM
10/24/10 01:13 PM
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Joined: Dec 2008
Posts: 459
pana illinois
bigblock4x4
OP
mopar
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OP
mopar
Joined: Dec 2008
Posts: 459
pana illinois
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Quote:
Quote:
Quote:
What is a voodoo 60302? I know it's a cam, but what?
Lunati Voodoo cams.
I mean, what's the specs?
it's 262/268,220/226@.050,.475/.494 with a 108 degree centerline,1400-5800rpm range
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Re: stock 400 build
[Re: OrangeProwler]
#835857
10/24/10 03:32 PM
10/24/10 03:32 PM
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Joined: Nov 2006
Posts: 1,459
oklahoma
forphorty
pro stock
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pro stock
Joined: Nov 2006
Posts: 1,459
oklahoma
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Quote:
I have a 400 myself as of recent and I am wondering how the Small Summit Cam would work for off the line? I noticed 1500-5000 rpm range where the Lunati Voodoo 60301 is 1000-5500 rpm. I am going to running a stock bottom end since I'm mostly just a cruiser. I have a Summit Cam in my 318 and I am happy with it but, it is 1200-5200 for the powerband. Anyways, just thinking.
I bet for what you are doing, both cams would be pretty similar in performance. As far as operating rpm range listed, those numbers are arbitrary,i.e. they just pulled the numbers out of their azzez.
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Re: stock 400 build
[Re: forphorty]
#835859
10/24/10 09:34 PM
10/24/10 09:34 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
I have a 400 myself as of recent and I am wondering how the Small Summit Cam would work for off the line? I noticed 1500-5000 rpm range where the Lunati Voodoo 60301 is 1000-5500 rpm. I am going to running a stock bottom end since I'm mostly just a cruiser. I have a Summit Cam in my 318 and I am happy with it but, it is 1200-5200 for the powerband. Anyways, just thinking.
I bet for what you are doing, both cams would be pretty similar in performance. As far as operating rpm range listed, those numbers are arbitrary,i.e. they just pulled the numbers out of their azzez.
small summit cam would work fine.
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Re: stock 400 build
[Re: BigBlockMopar]
#835861
10/25/10 01:23 PM
10/25/10 01:23 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
With those pistons still being a mile down in the holes it doesn't really matter what kinda lump of iron you put on there, it will still be a dog. In this stage I think compression ratio makes more power than headflow.
I agree with the '71bee here that in stock form I take a closed chamber head anytime over an open chamber smoghead. There's more than just this .5 point of compression gain. With proper 0-deck (dished) pistons there's also quench-effect to be achieved.
In true redneck style one could ofcourse put a .100" slab of JB weld on the pistons to increase the CR a bit...
bumping from 8:1 to 9:1 leaving all other things constant will yield in about a 4% power increase. I had a 360 that calculated out to just under 8:1 that made very respectable power, enough to allow my 3900lb 5th ave keep up with a 5.7L chrysler 300hemiC from a 20mph roll....some home porting to the heads, headers, RPM air gap, and a comp XE262 made for a very strong low comp motor.
anyway, I'd run the 452's if they're ready to run and are truly 80cc.
cam, run the lunati voodoo 60302. it's actually a 112LSA on a 108 ICL, and the comp XE268 is a 110 LSA on a 106 LSA.
with your weight, stall and gearing, I'd install it as ground (108LSA), if it was a heavier car, lower stall, or taller gearing, I'd consider installing it advanced another 2-4 degrees (104-106 degree ICL.
intake, I'd probably run in this order: performer RPM, DP4B, street dominator, performer, M1 dual plane, weiand dual plane, stock manifold,
I'd definitely run headers, cheapest 20hp/20lb-ft torque you'll find.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: stock 400 build
[Re: not_a_charger]
#835865
10/25/10 02:26 PM
10/25/10 02:26 PM
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Joined: Aug 2007
Posts: 1,819
Middle of A Field
OrangeProwler
top fuel
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top fuel
Joined: Aug 2007
Posts: 1,819
Middle of A Field
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Quote:
Quote:
I agree with patrick on the headers only because Comp Cams Program showed around the same gains going to small tube headers vs using HP log manifolds.
I wonder if the same would hold true with HP manifolds that have been cleaned up internally and port matched?
I would imagine if you had them extruded out a bit I would think there would be some marginal difference. I mean after there is guys in the FAST class that has some good tricks up their sleeve.
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Re: stock 400 build
[Re: not_a_charger]
#835867
10/25/10 02:35 PM
10/25/10 02:35 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
What about the rest of the exhaust system on a mild 400 like this? Would going to 2.5 duals be a worthwhile investment instead of 2.25 duals?
Depends. My car had a compression bent 2.25" exhaust system on it when I bought it and in places on the curves that thing necked down to 1.75" or less. To me that's not acceptable. But if your car has a mandrel bent 2.25" system on it, I would say just keep it. If your system needs replacing or you haven't bought yet, go with the 2.5". 
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w/ patrick on the intake manifold choices. With the voodoo 60302 being a mild cam and ground on a 112LSA, you wouldn't see a huge difference between hp manifolds and cheapie headers.