Re: Pick a cam for the Imperial
[Re: Twostick]
#2032032
03/16/16 12:16 AM
03/16/16 12:16 AM
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Joined: Dec 2013
Posts: 4,651 Wichita
GY3
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master
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Wichita
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Whatever you do put a degree wheel on it this time. You have 3 aftermarket components that that can be off ie cam and 2 gears. A degree off here or there on any or all parts can stack up to be the difference between it runs hard and it just runs.
Kevin Agree completely! Have you put a faster curve in the distributor? That's always done more to wake up soggy bottom ends than anything else on my Mopar vehicles. The 360 urged '75 Powerwagon was a slug down low until I recurved the distributor.
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Re: Pick a cam for the Imperial
[Re: NANKET]
#2033747
03/18/16 01:15 PM
03/18/16 01:15 PM
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Joined: Jan 2003
Posts: 28,065 Irving, TX
feets
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Senior Management
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Irving, TX
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Needs more compression, ditch the alum heads, go small chamber 1.60 exhaust valves. Still a band-aid.
Everything you have in that combo is wrong for what you want out of the car. Your alum heads are giving more away, More compression? Ya think? I'm not going to rebuild the engine on this thing unless it needs it. If that's becomes necessary the car will likely become yard art for a while. That also means that if I have to drop a bunch of money on the car it's going to be ignored for some time. The Eddy heads are on there because I had them and there was a problem with a factory head. I'm up to my ears in small projects and have a far more important car project I need to get to.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Pick a cam for the Imperial
[Re: NANKET]
#2033776
03/18/16 02:16 PM
03/18/16 02:16 PM
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Joined: Jan 2003
Posts: 14,610 Not2farfromNashville, TN
Rug_Trucker
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Not2farfromNashville, TN
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Needs more compression, ditch the alum heads, go small chamber 1.60 exhaust valves. Still a band-aid.
Everything you have in that combo is wrong for what you want out of the car. Your alum heads are giving more away, This! Those alloy heads require more compression. I would get some iron heads and do minor tweaks. It would be a big plus. Build the Hotroddave super torquey mileage motor in the furture.
"The only thing to do for triumph of evil is for good men to do nothing"
"NUNQUAM NON PARATUS!"
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Re: Pick a cam for the Imperial
[Re: Rug_Trucker]
#2033797
03/18/16 02:32 PM
03/18/16 02:32 PM
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Joined: Jan 2003
Posts: 28,065 Irving, TX
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Build the Hotroddave super torquey mileage motor in the furture. If I have to drop much money on this engine it will likely get replaced with something completely different.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Pick a cam for the Imperial
[Re: feets]
#2033909
03/18/16 04:50 PM
03/18/16 04:50 PM
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Joined: Jan 2005
Posts: 12,408 Kalispell Mt.
HotRodDave
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Aluminum heads do not "require" more compression, they "allow" more compression.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Pick a cam for the Imperial
[Re: WO23Coronet]
#2034047
03/18/16 08:48 PM
03/18/16 08:48 PM
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Joined: Jan 2003
Posts: 14,610 Not2farfromNashville, TN
Rug_Trucker
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Yeah I don't see any problem with a better flowing aluminum head, that's a non issue. It's not like they're B1's with giant ports, they're Edelbrocks that (if I remember correctly) had a mild cleanup. The Imperial will never be a rocket ship as is, low compression, tall gears, tight convertor, 5000lbs+, its operating as it should. That's why a well built 440 will walk off and leave a Street Hemi because of the big ports on the street model. These heads may have too big of ports for the RPM range.
"The only thing to do for triumph of evil is for good men to do nothing"
"NUNQUAM NON PARATUS!"
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Re: Pick a cam for the Imperial
[Re: Rug_Trucker]
#2034663
03/19/16 08:31 PM
03/19/16 08:31 PM
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Joined: Jul 2008
Posts: 259 Khemi, Stygia
Mebsuta
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Khemi, Stygia
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That's why a well built 440 will walk off and leave a Street Hemi because of the big ports on the street model. These heads may have too big of ports for the RPM range.
That's the same reason I'm not interested in the aftermarket aluminum heads for a 3.375 stroke 383.
68 Roadrunner. 383 4-spd. Beat up.
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Re: Pick a cam for the Imperial
[Re: feets]
#2034847
03/20/16 02:28 AM
03/20/16 02:28 AM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
pro stock
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pro stock
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Lakewood, Colorado
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We always had great luck running the Crower 267/271 cam in the B motors with Rhoads lifters. At 5000' we were gaining a bunch of torque even in the big heavy cars. That cam in a Blues Brother Monaco with a 440 and it would lay rubber easily. I might even consider going up to the 271/284 especially with the Rhoads VMax lifters. You get the longer duration and higher lift and good vacuum at idle. I can imagine at 700' it should be a much more spirited ride.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: Pick a cam for the Imperial
[Re: Rug_Trucker]
#2034855
03/20/16 02:47 AM
03/20/16 02:47 AM
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Joined: Jan 2008
Posts: 4,254 Canada
WO23Coronet
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Yeah I don't see any problem with a better flowing aluminum head, that's a non issue. It's not like they're B1's with giant ports, they're Edelbrocks that (if I remember correctly) had a mild cleanup. The Imperial will never be a rocket ship as is, low compression, tall gears, tight convertor, 5000lbs+, its operating as it should. That's why a well built 440 will walk off and leave a Street Hemi because of the big ports on the street model. These heads may have too big of ports for the RPM range. Big difference between Hemi port size and a 906 vs an Edelbrock rpm and a 906, apples and oranges. I think you guys are chasing your tails blaming the aluminum heads
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Re: Pick a cam for the Imperial
[Re: feets]
#2035825
03/21/16 04:34 PM
03/21/16 04:34 PM
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Joined: Jan 2005
Posts: 12,408 Kalispell Mt.
HotRodDave
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I Live Here
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Kalispell Mt.
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The 440 VS Hemi debate would not have any legitimacy if they had 440 cubes under the hemi heads. Try compareing a 426 wedge VS 426 hemi, even with the hp goodies from a 440 it ain's so close anymore. 14 cubes should be good for another 20lbs TQ. That ought to be enough to keep em even at launch then the hemi will simply walk away when the 906/915/452/306/516 heads choke. A little extra port velocity from more cubes sucking on the heads would help with air/fuel mix quality and help the plugs last a hair longer so tune-up frequency goes down.
As far as the imperial engine, those eddy heads are not causing any issue with power thats for sure.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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