Joined: Thu Mar 22 2007, 08:13AM
Location: In the workshop
Posts: 1063
rage607 wrote ...
what?
Only two of these cams exist, and I own them both.
Regarding the cams mentioned, I personally would not choose either. Instead, I would be looking at a Mopar P4452783 (1 bolt) or P4529270 (same cam, but 3 bolt).
Joined: Tue Mar 12 2013, 11:31AM
Location: Germany
Posts: 70
Well. The car is not a daily driver nor is it on the highway often. It's a fun car. In the USA it's an old car you use to see. But here I have the only 74 Newport around (for a miles long radius). I just cruise around and step on the gas when I'm in the mood for it. So it would be most city (I think). But the Car has seen over 110mph (autobahn). After that the Transmission had to be rebuild. So a high rpm camshaft would be useless. I've read good things about the voodoo and get the thing with the range. I asked If I should get the cam from idle-5000 or 1000-5000 because I wonder which will get the most power and torque at early rpm. @Uncle Joe why is the mopar P4452783 better. And what range does it have?
Joined: Thu Mar 22 2007, 08:13AM
Location: In the workshop
Posts: 1063
The range is usually stated as idle - 5800 rpm. Vacuum will be better than the others also, good for power brakes! If you need to brake hard for a "stau" then thats important!
Joined: Tue Mar 12 2013, 11:31AM
Location: Germany
Posts: 70
Will it give power like the voodoo cam? Is vacuum a problem with the voodoo? The car has everything of the A/C removed (the fluid is not allowed in Germany), if that is important to know.
Joined: Tue Mar 12 2013, 11:31AM
Location: Germany
Posts: 70
you're absolutely right with the A/C. But I don't use it so I get rid of it. Are you from germany, that you know those things?
anyways, I really don't know if I should take the voodoo or the mopar and what rpm range. If I stand at the stop sign and put the pedal to the metal I want it to push forward... Besides. I don't know what hp gain I would have (remembering that I have the cam from the 2bbl engine)
I'd get the Voodoo, Lunati makes great stuff. The stock cam in your car is a 256/260 grind, it is just that the newer cams have faster ramps to open the valves very quickly. Lunati opens quick and closes slow (very good), Comp opens/closes quick (merely good).
Mopar Performance cams have questionable reliability, likely being from some bad batches of iron used in the Chinese made castings--most are fine, but every now and then you'll get one that will wipe a lobe in 5 minutes (that means to grind the camshaft lobe into iron powder!)
BTW, I lived for many years in Sembach (zwischen Kaiserslautern - Mannheim) und also Fuerscheid in die Hoch Eifel (bei Bitburg). Ich hatte die Autobahn gern!
The 400's had REALLY low compression so you do not want to "overcam " this engine. The voo-doo's are excellent cams and i would stick with the smaller profile as it is better to "undercam" than "overcam" The Voo-doo's are a split cam meaning the intake/exhaust lifts are of different rate and have faster ramps than the factory's. The exhaust lifts and durations are more to balance the more obstructions in the exhaust ports that the intake lobes.A larger cubic inch engine can always use more lift and duration than a small cubic inch engine. So with the smaller 400 vs. a 440 i would go one step smaller on the 400. You will find that the voo-doo will supply you with plenty of vacuum for the power brakes. On my 418 small block stroker the cam is a Voo-doo .494/.513 lift one and combined with the 1.6" lift roller rockers it works out to a .523/.533" setup. The power brakes work surprisingly good for the duration of this engine. Lunatti does there homework as the techs who were at Ultradyne are now there.
Joined: Thu Mar 22 2007, 08:13AM
Location: In the workshop
Posts: 1063
As I understand things, the car in question is a 1974 Newport, originally fitted with a 2bbl 400.
Referring to Rockautos site, the stock 2bbl replacement cam has a 0.050 duration of 206 deg. intake, 209 exhaust. The 4bbl cam has 214 intake, 225 exhaust.
My thoughts now, taking into consideration the car already has a 4bbl and Edelbrock intake, is to swap for the 4bbl cam. Chances are, thats the best bang for buck. I seem to remember the 4bbl 400's as having 50 or so more bhp than the 2bbl's.
Joined: Sat Mar 29 2008, 03:36PM
Location: North eastern Wis.
Posts: 1638
This is an interesting read for me as I have a similar motor and was thinking of a cam change. I too am looking for torque more than anything. I am running a small stock 4 barrel carb and intake from a 66 383. I too am looking for a fun street car not a high way cruiser. Many state to go Voo-Doo. I kinda like the stock cam Uncle Joe is describing. As for springs, the add linked above, mentioned new springs a must. I would tend to go along with the "Why use 40 year old stuff with a new cam" train of thought myself.
Keep up the suggestions as many of us are following this.