Cam question

[Sixt8Chrgr]

I am considering putting this cam in my 68 Charger XR274HR-10. I wanted to get feedback from anyone that has used this cam or just wanted some general feedback as to if this is a good choice. My goal is to have a good blvd cruiser with a choppy idle that will do a good burnout. I am not going to drag race the car at all.
Here is my application.

75 440 bored .030
Stock forged crank
Stock rods
452 heads valves back cut, 3 angle valve job
3.23 gear
Car will operate ps, pb, stock A/C
The cam spec says stock converter ok. My car is originally a 383 H code car. The original transmission is in the car so I am assuming the stock converter is in there too, but don't know. Is the stock coverter a 2000 stall?

I want the powerband to be from 1500 to 5500...this cam "comes in" at 1900 so a little too high for my spec.

Thanks for the feedback and if someone has a better cam choice please share it with me.

[firefighter3931]

Hyd roller cams are expensive when you add up all the parts. 

For a build like yours i would go with a solid flat tappet like the Comp XS274S and call it good. The converter for a 383 4bbl would be a higher stall 11in unit than what would have come with a 440 or 383 2bbl so it will work fine with that cam...assuming you have the original converter for that car.


Ron

[Sixt8Chrgr]

Ron,

Would that cam work well with 3.23 gears?

[firefighter3931]

Ron,

Would that cam work well with 3.23 gears?

Absolutely ! I specced that grind for Chuck's General Lee and he has 2.76's in his car 

Look for the comments by Skip68 (chuck) in these threads....he's a happy camper 

http://www.dodgecharger.com/forum/index.php/topic,66959.0.html

http://www.dodgecharger.com/forum/index.php/topic,66153.0.html

http://www.dodgecharger.com/forum/index.php/topic,67319.0.html


Ron

[Sixt8Chrgr]

Ron,

Since I am going to be running my factory air and don't want to lose the charge do you think the XE 274H would be a good choice with my app?

Thanks,

Lawrence

[Sixt8Chrgr]

My above post is a little cryptic...sorry. My point is that if I run the solid lifter cam I will have to be removing the a/c lines (losing the charge) to take the valve covers off in order to adjust the valves. If I run the hydraulic cam I don't have to worry about any of that.

[firefighter3931]

If you were wanting to go with a hydraulic cam i would consider the XE268H or something similar assuming you wanted to use the stock converter and 3.23 gears. Do you plan to run headers ?


Ron

[Sixt8Chrgr]

If you were wanting to go with a hydraulic cam i would consider the XE268H or something similar assuming you wanted to use the stock converter and 3.23 gears. Do you plan to run headers ?


Ron

Yes I will run headers. I am not opposed to changing converters, but if I dont have to that would be great. I do want a nice choppy idle too.

[Sixt8Chrgr]

If you were wanting to go with a hydraulic cam i would consider the XE268H or something similar assuming you wanted to use the stock converter and 3.23 gears. Do you plan to run headers ?


Ron

Ron,

If I decide to run Edelbrock aluminum heads is your suggestion the same?

Thanks,

Lawrence

[firefighter3931]

If you were wanting to go with a hydraulic cam i would consider the XE268H or something similar assuming you wanted to use the stock converter and 3.23 gears. Do you plan to run headers ?


Ron

Yes I will run headers. I am not opposed to changing converters, but if I dont have to that would be great. I do want a nice choppy idle too.

The XE 268 will work great with headers and the 11in converter you should have in the car. It has some chop/rumble at idle and sounds healthy. It won't be mistaken for stock. 

If you were wanting to go with a hydraulic cam i would consider the XE268H or something similar assuming you wanted to use the stock converter and 3.23 gears. Do you plan to run headers ?


Ron

Ron,

If I decide to run Edelbrock aluminum heads is your suggestion the same?

Thanks,

Lawrence

Sure that cam would work fine with a set of RPM heads but you would be leaving some power on the table. The Eddy's flow well up to .600 valve lift so to maximize performance a bigger cam will net better results. Of course the other parts will need to be properly matched. The RPM heads use an angled sparkplug arrangement so header choice is limited and expensive. Another option is the MP 452 aluminum heads which are identical to the Eddy heads but employ straight plugs like a stock head....so any header will fit.



Ron

[Sixt8Chrgr]

If you were wanting to go with a hydraulic cam i would consider the XE268H or something similar assuming you wanted to use the stock converter and 3.23 gears. Do you plan to run headers ?


Ron

Yes I will run headers. I am not opposed to changing converters, but if I dont have to that would be great. I do want a nice choppy idle too.

The XE 268 will work great with headers and the 11in converter you should have in the car. It has some chop/rumble at idle and sounds healthy. It won't be mistaken for stock. 

If you were wanting to go with a hydraulic cam i would consider the XE268H or something similar assuming you wanted to use the stock converter and 3.23 gears. Do you plan to run headers ?


Ron

Ron,

If I decide to run Edelbrock aluminum heads is your suggestion the same?

Thanks,

Lawrence

Sure that cam would work fine with a set of RPM heads but you would be leaving some power on the table. The Eddy's flow well up to .600 valve lift so to maximize performance a bigger cam will net better results. Of course the other parts will need to be properly matched. The RPM heads use an angled sparkplug arrangement so header choice is limited and expensive. Another option is the MP 452 aluminum heads which are identical to the Eddy heads but employ straight plugs like a stock head....so any header will fit.



Ron

Thanks so much for the heads up relative to the headers and the spark plug placement. I am sure I will have other questions.

Thanks Ron,

Lawrence

[Sixt8Chrgr]

Ron,

I dropped the motor off at the builders shop yesterday and will need to give him direction soon. Here is the build so far:

Originally 68 383 H code car

440 bored.030
Edelbrock Performer RPM with drop down base
Holley 750 CFM vacuum secondaries, dual feed
Steel Crank
New Cast pistons, rings were in the motor when I bought it. As well as the machine work. My builder will confirm the quality of these items.
Comp Cam 452 heads ported, valves back cut .030
Headers
Stock 383 4 bbl stall converter
3.23 gears
ps, pb, factory air
727 transmission (stock)

Here is my question, what rockers should I use? Roller rockers with the factory shafts? The Crane iron ductile that I have seen you have requested to others or just use the OEM rockers and shafts that are on the car?
One more question, what distributor should I run on the car?


Thank you,

Lawrence

[Sixt8Chrgr]

anybody have feedback for me on roller rockers for the above motor?

Thanks,

[firefighter3931]

With the combo you've outlined the stock rockers/shafts/pushrods are fine as long as they are in good shape. A set of Comp #911 valvesprings will compliment that cam and fit perfectly with the stock retainers/locks.

Roller rockers are overkill on that combo and won't make anymore power. 


Ron

[Sixt8Chrgr]

With the combo you've outlined the stock rockers/shafts/pushrods are fine as long as they are in good shape. A set of Comp #911 valvesprings will compliment that cam and fit perfectly with the stock retainers/locks.

Roller rockers are overkill on that combo and won't make anymore power. 


Ron

You are awesome...thanks so much for the help.

Many thanks!

[firefighter3931]

You're welcome....good luck with the build. I'm sure you'll be happy with the results. 


Ron

[Sixt8Chrgr]

I will post the dyno numbers when I get them and as many pictures of the rebuild as possible.