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cam suggestions for 440
#359953
06/27/09 08:02 PM
06/27/09 08:02 PM
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Joined: May 2005
Posts: 2,295
dark side of the moon
Dougsmopars
OP
top fuel
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OP
top fuel
Joined: May 2005
Posts: 2,295
dark side of the moon
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I bought this 68 GTX with 440 automatic. It has a 750 double pumper which i'm going to replace with an Edelbrock 800 Thunder series. It has a racer brown cam in it of unknown specs. Very lumpy idle. Very poor vacuum. Way too much cam. Motor was rebuilt about 5000 miles ago according to previous owner. Has Torker intake Mopar ignition with orange box and headers. I'm looking for a good cam that will be very torque on bottom end. Something will make plenty of power from around 1500 to 5500 RPM. Would like to be able to put the power breaks back in the car. I made this mistake before installing to big a cam for a basically stock motor. I put a mopar 509 purple shaft in my Road Runner with 440 six pack 4 speed. It made less power then with stock cam. Any of you guy's have any suggestions? I was looking at some of the Lunati VOODO cams? Any thoughts? I want to keep it hydraulic.
Last edited by Dougsmopars; 06/27/09 08:04 PM.
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Re: cam suggestions for 440
[Re: Dougsmopars]
#359954
06/27/09 08:05 PM
06/27/09 08:05 PM
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Joined: Jun 2008
Posts: 565
IA
landon1
mopar
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mopar
Joined: Jun 2008
Posts: 565
IA
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i looked at the voodoo cams, but i don't think too many people are running them in 440s - don't hear too much about them anyhow. i went with Comp XE 268. power in the same range you're looking for (basic street range). mine is not installed (still waiting on my block at the machine shop).
'71 Satellite Sebring 440
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Re: cam suggestions for 440
[Re: Dougsmopars]
#359955
06/27/09 08:08 PM
06/27/09 08:08 PM
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Joined: Mar 2003
Posts: 1,216
Fresno, CA
cudamank
pro stock
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pro stock
Joined: Mar 2003
Posts: 1,216
Fresno, CA
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I run the Voodoo 60303, 440, .030 over, 10.5, 3400 stall, performer intake, 750 speed demon nice idle, still plenty of vacuum for my brakes.
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Re: cam suggestions for 440
[Re: Dougsmopars]
#359959
06/27/09 09:29 PM
06/27/09 09:29 PM
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Joined: Feb 2003
Posts: 2,069
Renton, WA
GreenBlurr
super gas
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super gas
Joined: Feb 2003
Posts: 2,069
Renton, WA
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Quote:
I bought this 68 GTX with 440 automatic. It has a 750 double pumper which i'm going to replace with an Edelbrock 800 Thunder series. It has a racer brown cam in it of unknown specs. Very lumpy idle. Very poor vacuum. Way too much cam. Motor was rebuilt about 5000 miles ago according to previous owner. Has Torker intake Mopar ignition with orange box and headers. I'm looking for a good cam that will be very torque on bottom end. Something will make plenty of power from around 1500 to 5500 RPM. Would like to be able to put the power breaks back in the car. I made this mistake before installing to big a cam for a basically stock motor. I put a mopar 509 purple shaft in my Road Runner with 440 six pack 4 speed. It made less power then with stock cam. Any of you guy's have any suggestions? I was looking at some of the Lunati VOODO cams? Any thoughts? I want to keep it hydraulic.
You could start by NOT undercarbing your 440 like too many people on here seem to do. A holley 750 is nowhere near enough for that motor with that kind of cam....especially if it still has the same jetting it came with out of the box. And an edelbrock 800 will not be a step in the right direction either. Sure, they have good just off idle response in their accelerator shot, but they are lean as heck form there out becuase they do not hold any danged fuel.
You need a holley 850 double pumper for that motor that is properly jetted and fitted with squirters and eccelerator pump cams to compliment said jetting.
You will not recognize the motor in the world of difference in its runability and performance.
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Re: cam suggestions for 440
[Re: DAYCLONA]
#359963
06/27/09 10:00 PM
06/27/09 10:00 PM
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Joined: Jan 2003
Posts: 21,073
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,073
Niles , Ohio
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For a decent cam for a driver I had luck with Summits big cam kit.Racy type idle pulls strong good vacuum and all around good for a streeter.One is still running in a 383 after 20 years.Id run a Holley Street Dominator with an 850 Holley.Rocky
Chrysler Firepower
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Re: cam suggestions for 440
[Re: Dougsmopars]
#359967
06/27/09 11:08 PM
06/27/09 11:08 PM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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I'm sure most racer's love there Holley carbs. I personally hate them. I've never had one that you weren't constantly tweeking. Change in temp, air presure, a fly landing on the windsheild. Anything seems to change there tune. I don't want to spend 20 minuites every time i want to take the car out to tweak the carb.
I don't know Doug,....Holleys are perhaps the easiest carbs to tune, and stay tuned, while I personaly put a SIX PAK on everything,.....I've had my share of Carters, AFB, AVS, WCFB, Thermoquads, Eldebricks, Qjets, Predators, etc, over the decades,....Holleys IMHO are superior,.....but any fuel system, if "treated" wrong, can be a problem, tune/reliability wise......
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Re: cam suggestions for 440
[Re: DAYCLONA]
#359968
06/27/09 11:18 PM
06/27/09 11:18 PM
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Joined: Feb 2003
Posts: 2,069
Renton, WA
GreenBlurr
super gas
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super gas
Joined: Feb 2003
Posts: 2,069
Renton, WA
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Quote:
I'm sure most racer's love there Holley carbs. I personally hate them. I've never had one that you weren't constantly tweeking. Change in temp, air presure, a fly landing on the windsheild. Anything seems to change there tune. I don't want to spend 20 minuites every time i want to take the car out to tweak the carb.
I don't know Doug,....Holleys are perhaps the easiest carbs to tune, and stay tuned, while I personaly put a SIX PAK on everything,.....I've had my share of Carters, AFB, AVS, WCFB, Thermoquads, Eldebricks, Qjets, Predators, etc, over the decades,....Holleys IMHO are superior,.....but any fuel system, if "treated" wrong, can be a problem, tune/reliability wise......
Yeah, if you are having to tinker with your holley everytime you drive the car due to the car's not not running quite right or running different all of the time, then you have manifold vacuum leaks, and/or timing issues.
Every holley I have ever built for myself or anyone else has done well in all seasons, once it is jetted into an acceptable zone that is not too rich when its warm and dry out, and does not run too lean when its cold and wet out. Adequate timing is also the partner of the carb when you get it where you need it.
Just take a step back and don't imagine holleys or the science behind them as so complicated. It's actually very simple and has a reliable method to it.
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Re: cam suggestions for 440
[Re: 440newport]
#359971
06/28/09 02:17 PM
06/28/09 02:17 PM
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Joined: Jan 2007
Posts: 1,163
NORTHERN VA
THESHAKERPROJECT
super stock
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super stock
Joined: Jan 2007
Posts: 1,163
NORTHERN VA
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Quote:
Crower 271HDP
222/234 @ .050, 271/284, .486/.496
BINGO !!! Thats a GREAT CAM for a street/ strip car and check out the 112 LSA !! I have the one step hotter Crower 275 HDP in my 4000+LB 71 Charger R/T and I use a STOCK (1800 STALL)converter and 3.55 rear for 12.9 @109 mph with a 73 Thermoquad ! I used the 271 HDP in my SIXPACK Challenger R/T and that car should run min 12s.
You can get the cam from Summit. 
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