what cam ?

[adk-roadrunner]

Ok here it goes I've gotten a little further in my 440 build and im trying to decide on a camshaft and I am looking at a comp cams cam kit but not sure which one I need. here is what I know so far 1973 roadrunner auto 83/4 sure grip 3.23 gears,hp manifolds,2.5 exhaust, 440 block 30 over ,rebuilt 452 heads stock valve size,speed pro pistons http://www.summitracing.com/parts/slp-l2355f30 , stock rods,weiand 6008 dual plane intake,not sure on what carb I will need to use yet but as far as my goals I want it to be a nicely warmed up 440 with upgrade potential. If there is any other info needed that I forgot let me know thanks.

 

[67 coronet]

most inportant thing to remember is to match all your parts to the same rpm power band.since you already have an intake make sure your cam rpm range will match that.more people have problems with a 3000 to 7500 intake matched with a 2000 to 5500 cam and a huge carb."why wont it run right?"duh!

 

[wedgie]

Are you sure that Comp is the best choice? I believe that the lobes are ground using Chevy lifter specs. Mopar lifters allow for more aggresive ramps. Racer Brown cams are specific for Mopars, I believe. I have used his cams with great results. You may want to call with all your specifications and he'll tell you which came will work best for your application.
If you would rather not use Racer Brown, the MP cams have always worked well. No matter what cam, be sure to use oil that containd ZDDP (zinc).

 

[RustyRatRod]

I kinda like this one for your app.

http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=711&sb=2

That cam has Chrysler specific lobes, not chebbie lobes like a lot of the rest. That means there's more lift per duration than other makes. It takes advantage of the Chrysler .904" lifter diameter. Charles has it in his 383 in his rat rod truck. It runs great and sounds real nice.

 

[minnesota guy]

Ok here it goes I've gotten a little further in my 440 build and im trying to decide on a camshaft and I am looking at a comp cams cam kit but not sure which one I need. here is what I know so far 1973 roadrunner auto 83/4 sure grip 3.23 gears,hp manifolds,2.5 exhaust, 440 block 30 over ,rebuilt 452 heads stock valve size,speed pro pistons http://www.summitracing.com/parts/slp-l2355f30 , stock rods,weiand 6008 dual plane intake,not sure on what carb I will need to use yet but as far as my goals I want it to be a nicely warmed up 440 with upgrade potential. If there is any other info needed that I forgot let me know thanks.

Hey, I have similar set ups in 3 440's. All using the 6 pack pistons you have here. Dump that Weiand Dual plane. 40 yr old outdated. Go with a Performer RPM 440 intake. You will see a difference immediately with that intake. Regarding the camshaft, I agree that Racer Brown is awesome. I use his 300 duration/ .520 lift hydraulic in my 71 Cuda 440 (6 pack pistons) and run 11.6. However, in my 87 440 Dodge w150 I run a Lunati "Voodoo" and took out a Comp Cams..What a difference that made! I picked up 3 mpg with similar specs (the 256 Voodoo cam; .475 lift)

If you are looking at hot street, I would run the Voodoo cam around 268/276 duration. Part Number: LUN-10230703LK More Detail... (Summ it)

I haven't had as good of luck with Comp, but they make decent cams. I really like Racer Brown and Voodoo cams...The old Purple shaft stuff is outdated somewhat. You take any one of their grinds and get the Voodoo cam close to it and it will make more torque and HP.
Just my 2 cents from experience..and using those 6 pack pistons. A Thermoquad intake is equal or better than that Weiand you have.:angry9:

 

[adk-roadrunner]

the reason I planned on using the weiand intake was because it came with my 440 when I bought it. if it isnt going to work for me I wont hesitate to replace it and put it up for sale it was kind of a freebie so Im not in love with it.

 

[lewtot184]

air flow on those heads will peak around .450 lift, unless you do some serious re-working (porting and bigger valves). so why a high lift cam? anything over .480 lift at the valve on stock heads and you need to take a serious look at retainer to guide collision. you don't state what your intent is for the engine but with the parts you have i'd get one of those big summit cams (i believe they are the crane hmv278 profile). should work fine with stock heads, stock valve train, exhaust manifolds, and 3.23 gear in a heavy car. i hate cam recommending posts, their sooo subjective.

 

[RustyRatRod]

How sure are you about that intake number? Could it be 8008? If it is, that's for a low deck. In either case, it's better than a stock intake. If it's a tall deck intake, use it. It will work fine.

 

[adk-roadrunner]

This is the intake thankyou for all the help guys I definitely need it when it comes to this stuff as I have very little knowledge about this topic. I do realize that this is a very subjective topic and I am finding that there are alot of different ways to achieve certain goals its actually a bit intimidating lol. As far as my goals go they are fairly simple i think lol this is my first mopar and I love it and I drive it almost every day when there isn't snow on the ground that is. That being said reliability driveability are important and having some extra power is great too. Am I going to be drag racing at the nearest track on the weekends probably not but I would hate to put myself in a position to where upgrading later on to make it even more powerful is difficult or impossible. Maybe my goals need to be adjusted a bit lol I'm not sure that's why I rely on the experience and knowledge from the guys who have been there before.

 

[Meep-Meep]

I'm running high 12's with a stock iron intake, iron heads and a .455" lift cam so I don't want to hear any complaining about intakes :sideways tongue: If I had the choice between a cam change and an intake change I'd pick the cam because in my experience a cam change will do the most good. Taking off a stock intake and putting on a Performer or similar on a STOCK engine is pretty much a waste of money because the gain is very small, but changing the cam to slightly over stock (and I mean slightly) you can expect some serious improvements. This is where you need to be careful and not over cam.

I have been leaning towards a Lunati for a 451 build I will be doing soon, and mainly because the cams I'm looking at are on a 112 lobe separation. This is good compromise for a street engine. Even 110 can work well but stay away from the 108 deg cams if you want a TRUE street car because too much overlap is not good for low speed driving. Also like Lew said, with a smaller cam you will need less spring and not have to worry about all the other stuff that goes with.

The zero deck 6 BBL pistons are perfect! Also, shoot for 9.5:1 CR max and about 170 PSI of cylinder pressure for pump 91 gas (because eventually everyone will get that crap we have in CA). I have 10.1:1 and 190 PSI and that is too much for 91 assuming the mixture is close to correct. 38 deg max total timing and can probably get away with 34. With the proper cam and compression ratio 12 I is about right.

 

[adk-roadrunner]

I do actually have a stock iron intake as well that came with my engine only chose the weiand as it seemed the obvious choice to me as far as stock cam goes my 440 is a 78 and was out of a motor home so the stock cam from what i've read is pretty much useless so I just packed it away in the not sure what to do with pile lol.

 

[RustyRatRod]

That's a great intake. Use it.

This is the intake View attachment 96419 thankyou for all the help guys I definitely need it when it comes to this stuff as I have very little knowledge about this topic. I do realize that this is a very subjective topic and I am finding that there are alot of different ways to achieve certain goals its actually a bit intimidating lol. As far as my goals go they are fairly simple i think lol this is my first mopar and I love it and I drive it almost every day when there isn't snow on the ground that is. That being said reliability driveability are important and having some extra power is great too. Am I going to be drag racing at the nearest track on the weekends probably not but I would hate to put myself in a position to where upgrading later on to make it even more powerful is difficult or impossible. Maybe my goals need to be adjusted a bit lol I'm not sure that's why I rely on the experience and knowledge from the guys who have been there before.

 

[73frostmistsatellite]

I have considered putting this cam in my stock 440 with 906s and 3.23 gears.
http://www.hughesengines.com/Index/...nQ=&searchmode=partnumber&page=4&partid=25116

 

[lewtot184]

I have considered putting this cam in my stock 440 with 906s and 3.23 gears.
http://www.hughesengines.com/Index/...nQ=&searchmode=partnumber&page=4&partid=25116

you'll probably have retainer to guide problems with that much lift.

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This is the intake View attachment 96419 thankyou for all the help guys I definitely need it when it comes to this stuff as I have very little knowledge about this topic. I do realize that this is a very subjective topic and I am finding that there are alot of different ways to achieve certain goals its actually a bit intimidating lol. As far as my goals go they are fairly simple i think lol this is my first mopar and I love it and I drive it almost every day when there isn't snow on the ground that is. That being said reliability driveability are important and having some extra power is great too. Am I going to be drag racing at the nearest track on the weekends probably not but I would hate to put myself in a position to where upgrading later on to make it even more powerful is difficult or impossible. Maybe my goals need to be adjusted a bit lol I'm not sure that's why I rely on the experience and knowledge from the guys who have been there before.

best thing to do is get off the internet and call some cam grinders for recommendations. the stuff people throw out on these websites for camshafts is crazy.

 

[RustyRatRod]

you'll probably have retainer to guide problems with that much lift.

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best thing to do is get off the internet and call some cam grinders for recommendations. the stuff people throw out on these websites for camshafts is crazy.

You call cams suggested on this thread crazy? The way I was figuring it, he wanted something to sound a little better than grandmaw's 4 door POS. Besides, his heads are in the machine shop already and cutting guides down for extra lift would be a DIRT cheap add on. What do you consider a good hot street cam? The Road Runner cam? That's not a smartass question. I really want to know what you would recommend. I value your input. You're pretty level headed. I also agree about calling the cam maker. More than one in fact.

 

[minnesota guy]

Hi, I still recommend the Performer RPM 440 intake. The best Chrysler RB factory intake for single 4bbl is the Thermoquad. I ran a stock class for years with this intake, 6 pack pistons, Carter AVS on my 71 Cuda. Consistent 11.89's. I ran 2/10's better with that intake than a 1970 variety and also the old m01 dual plane. They do not flow as well. However the Thermoquad intake had the center meat all taken out so it was a square opening. Milled the wall to 5/8 inch. Used and adapter with the old 1971 AVS carb. Great intake as far as factory heavy iron goes. But, they are very heavy. I run 6 pack pistons in my 87 w150 440. I was running a thermoquad intake (1972-78) and took it off in favor of the Peformer RPM. There was a noticeable difference in performance. It scooted much better out of the hold. This was prior to taking out the comp cam and putting in the Voodoo. But, you need more hood clearance for the Performer RPM 440. They sit taller. Best dual purpose intake out there today. Read the Mopar magazine article on intakes. They did 11. I still have the mag. Another good intake is the Holley Street Dominator. It makes more torque than the factory pieces as well. And it sits lower. Your heads are fine with those pistons. The extra lift of of the Voodoo cams is beneficial. It is a modern grind. Voodoo 268. Not true that stock heads quit flowing at .450 lift. They keep flowing up around .520-.550... They respond to this type of cam, especially with the higher compression pistons you are using. the Summit cams are old designs and are not impressive.old, slow ramps. You won't like it as much. New Voodoo and Xtreme energy cams take advantage of lobe ramp technology. This cam is good for 20 hp over a typical old school .455 lift camshaft. Anymore than 268 cams and you need a looser converter as well. Cam will work well with 323 gears. I am telling what I know based on my own tests with this stuff. I am always looking to go faster, get more fuel economy , etc. I can only advise from direct experience. I port my own heads and drag race as well. I am only telling what has worked for me. My friends have used the summit cams and their are much better cams out there...

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That cam is too big for 3.23 gears. You need 3200-3500 stall converter and 3.91 at least.

 

[451Mopar]

The Lunati Voodoo 10230703LK cam kit (cam and lifters) would match your combination pretty good and is only $219.
Specs are 226/234 @ 0.050", 0.494"/0.513" lift. The next size up cams would be better with more gear and stall speed.
I think these cams use a 3-bolt timing chain set which i prefer over the single bolt setup.

 

[RustyRatRod]

I agree. I think something along those lines is perfect for his combo. That's why I listed what I did.

The Lunati Voodoo 10230703LK cam kit (cam and lifters) would match your combination pretty good and is only $219.
Specs are 226/234 @ 0.050", 0.494"/0.513" lift. The next size up cams would be better with more gear and stall speed.
I think these cams use a 3-bolt timing chain set which i prefer over the single bolt setup.

 

[Meep-Meep]

I agree the killer here is the OP's gear ratio, which is why I'm suggesting a small cam. And with a small smooth profile cam comes not a lot of spring required, no retainer to guide clearance issues, longer cam life and a few other benefits as well.

In response to Rusty's comment, the RR cam is on a 115 LS so a slight tweak in overlap to say a 112 LS and a duration increase will make a huge difference. Lift is somewhat irrelevant as is not the most important factor in picking a cam.

 

[451Mopar]

I didn't calculate the compression, but I think those pistons are around 9.0 to 9.5:1 depending on head cc and gasket? Edited, my bad those are the higher compression pistons, so maybe 9.5:1?