331 Cam Opinions

[dcurtis]

Ok, after looking around for a stock stroke rotating assembly a few people on here have changed my mind and I am now leaning more towards the 331 liberator shortblock from fordstrokers, I do still plan on using the world product windsor jr heads, 70mm tb, 76mm maf, pro magnum 1.6 rockers, 190 fuel pump, and I guess either a tfs stret heat or edelbrock performer intake, so now my question is, will 24lb injectors be enough for the 331 or would it be better with 30lb'ers, and how about the afm n-41 camshaft , should I still run that cam or would you recommend something differant, also what kind of power will the 331 make with the mods listed, again, the car is a daily driver about 3 days a week with an automatic and 3.73's and a 2800 stall? I dont race it or anything but I would like it to get sideways if and when I want it to, it will probably only see the track once or twice.
Anyways thanks for all of your help and hopefully some day my stang will keep up with some of yours

 

[5spd GT]

The 24lb injectors and that combination would be fine. Killercanary has a 347, custom cam, Systemax intake, and AFR 165's, and he is only running 82% max duty cycle. The 30lb injectors would be okay too.

Is this the cam you are talking about?

AFM N-41 - 222*/232* - .512"/.512" - 110* - Centerline 106*

That cam would be fine, but I would talk with Mr. Anderson on the phone and he will tell you which cam he would want you to run for your goal.

A custom cam maybe a bit better if you want to go that route...

Good Luck

 

[dcurtis]

The 24lb injectors and that combination would be fine. Killercanary has a 347, custom cam, Systemax intake, and AFR 165's, and he is only running 82% max duty cycle. The 30lb injectors would be okay too.

Is this the cam you are talking about?

AFM N-41 - 222*/232* - .512"/.512" - 110* - Centerline 106*

That cam would be fine, but I would talk with Mr. Anderson on the phone and he will tell you which cam he would want you to run for your goal.

A custom cam maybe a bit better if you want to go that route...

Good Luck

Yeah, that's the cam

 

[dcurtis]

Ok, so the liberator 331 shortblock, windsor jr heads, n-41 camshaft, 1.6 rollers, 70mm tb, 76mm maf, 24lb injectors, 190 fuel pump, and the holley systemax intake with 3.73's, 2800 stall and an auto tranny will be a good street driven combo? About what kind of power should this all make? Would it benifit from a cam with more lift and a 112 lsa over the 110 of the n-41 cam?

 

[5spd GT]

Using more lift, can typically help gain torque paired with a corrected duration...

I see Ed Curtis, with his custom cams, use high lift/low duration for his daily driver cams, and for his weekend warrior cams use lower lift/high duration.

A 110 -112* overlap/lobe seperation angle is okay.

When you tighten the overlap (* is smaller, like 108) you get a bit more torque on the bottomend, increases maximum torque value, less vacuum, choppier idle, and a narrow powerband.

When you widen the overlap (* is larger, like 112) you get a bit more torque on the mid-top end, decreases maximum torque value, more vacuum, smoother idle, and a broader powerband (good for a daily driver car).

 

[dcurtis]

Do you think the comp cams cam, #cca-31-442-8 would pull harder than the n-41 cam, the n-41 says 2800 to 6200 and the comp says 2500 to 6000, I would rather it top at 6000 like the comp does, don't our cars have the limiter at 6250 anyways, if so I would rather the cam peak right before the limiter rather than right at it, anyways the specs for the comp are

2500 to 6000 rpm range
224-224 duration at .05
284-284 advertised duration
.533-.533 lift
110 LSA

compared to n-41

2800 to 6200 rpm range
222-232 duration at .05
unknown advertised duration
.512-.512 lift
110 LSA

 

[2002BLGT]

Do you think the comp cams cam, #cca-31-442-8 would pull harder than the n-41 cam, the n-41 says 2800 to 6200 and the comp says 2500 to 6000, I would rather it top at 6000 like the comp does, don't our cars have the limiter at 6250 anyways, if so I would rather the cam peak right before the limiter rather than right at it, anyways the specs for the comp are

2500 to 6000 rpm range
224-224 duration at .05
284-284 advertised duration
.533-.533 lift
110 LSA

compared to n-41

2800 to 6200 rpm range
222-232 duration at .05
unknown advertised duration
.512-.512 lift
110 LSA

if you are going to put an engine in the car like that , do put that small of a cam in it unless you are not running a stall , get something in a 540 plus lift and 286 would be the min adv duration I would run , i am running an X303 in my 306 and its daily driveable with tailpipes on it , not so much with the dumps I have on it now , but I am almost wishing I had ran something bigger , mines good to about 6300RPM s but if I changed intakes I think I could get a little more top end out of it , I am only running a stock unported cobra ......and trust me the bottom end is there , I just twisted the stock driveshaft yoke about an eighth inch on all motor .....and I am planning on hitting it with a 175 shot ........

 

[5spd GT]

Do you think the comp cams cam, #cca-31-442-8 would pull harder than the n-41 cam, the n-41 says 2800 to 6200 and the comp says 2500 to 6000, I would rather it top at 6000 like the comp does, don't our cars have the limiter at 6250 anyways, if so I would rather the cam peak right before the limiter rather than right at it, anyways the specs for the comp are

2500 to 6000 rpm range
224-224 duration at .05
284-284 advertised duration
.533-.533 lift
110 LSA

compared to n-41

2800 to 6200 rpm range
222-232 duration at .05
unknown advertised duration
.512-.512 lift
110 LSA

I like your thinking with the stock rev limiter, unless of course you get it extended.

My cam is a 224/224*, .560"/556" lift, pure street cam...but it is on a 302/306...

Do you have anything against a custom cam? It gives you the max. performance, driveability, etc. for a bit more.

2002BLGT - A custom cam would beat the X cam out and below the 6,300 RPM you are shifting at...check them out if you want to swap cams.

 

[dcurtis]

I like your thinking with the stock rev limiter, unless of course you get it extended.

My cam is a 224/224*, .560"/556" lift, pure street cam...but it is on a 302/306...

Do you have anything against a custom cam? It gives you the max. performance, driveability, etc. for a bit more.

2002BLGT - A custom cam would beat the X cam out and below the 6,300 RPM you are shifting at...check them out if you want to swap cams.

No, nothing against a custom cam, I just havn't looked into one of them yet, I would like it to peak at around 6100 as it is going to be a mostly street driven car, I dont need power above that, where is a good place to get a custom cam, I would prefer a place that will tell me the specs of the cam before I get it.

 

[dcurtis]

if you are going to put an engine in the car like that , do put that small of a cam in it unless you are not running a stall , get something in a 540 plus lift and 286 would be the min adv duration I would run , i am running an X303 in my 306 and its daily driveable with tailpipes on it , not so much with the dumps I have on it now , but I am almost wishing I had ran something bigger , mines good to about 6300RPM s but if I changed intakes I think I could get a little more top end out of it , I am only running a stock unported cobra ......and trust me the bottom end is there , I just twisted the stock driveshaft yoke about an eighth inch on all motor .....and I am planning on hitting it with a 175 shot ........

I am going to be running around a 2800 stall unless I need bigger. I dont realy want a stall over 3000 though.

 

[5spd GT]

No, nothing against a custom cam, I just havn't looked into one of them yet, I would like it to peak at around 6100 as it is going to be a mostly street driven car, I dont need power above that, where is a good place to get a custom cam, I would prefer a place that will tell me the specs of the cam before I get it.

Ed Curtis - www.flowtechinduction.com and they run $325.

Jay Allen - www.camshaftinnovations.com and they run $400 for a billet core (very nice piece)

Buddy Rawls - http://www.wighat.com/fcr3/index.html and I believe it runs in the $275 area

Unfortunately they will not give out specs before you purchase it. But I promise you, the cams are set to what you tell them. Just tell them your goals that you want and the parts you run...and within a few emails, you send your payment to them, and then a few weeks later (atleast in Ed's case) you get a cam

You email them (Ed in my case) with a list like below:

Let them know what size stroke (3.25")
bore (4.030")
List what heads, intake, throttle body, maf, exhaust (longtubes or shorties and primary size), etc.

Then put what you would like as far as driveability. Tell them how much you drive it, and your going to want some vacuum for the power brakes.

Basically tell them your combo, or atleast what you know of it, and he may suggest other particular parts.

He made my cam clear bone stock '93 pistons with plenty of clearance...

When you get the cam, you will probably think, "Can I run this cam without clearance issues" You will see that you can...

 

[dcurtis]

I just finished sending all of my info to ed curtis, so he won't tell me the specs of the cam? Will he atleast tell me the lift, not worried about duration but I am skidish running high lift, never ran a can over .500, and that was in a chevy 350, but I guess ed knows his **** or people wouldn't recommend him.

 

[5spd GT]

I just finished sending all of my info to ed curtis, so he won't tell me the specs of the cam? Will he atleast tell me the lift, not worried about duration but I am skidish running high lift, never ran a can over .500, and that was in a chevy 350, but I guess ed knows his **** or people wouldn't recommend him.

The piston is near 2.00" in the bore when your lifter is on the peak lift area of the cam Lift isn't a concern hardly at all when considering p-v clearance...

A stock .444" lift cam would have p-v clearance problems if it had some serious ramp rates (steep) with early intake and late exhaust valve events...

Like I said, I had .560" lift with my stock pistons. You are probably going to be suggested a different valve spring to handle his cam. I have put on 30k on my AFR's with his valve springs and cam, with not a hint of problems.

I told him I wanted a cam for a 110% daily driver, and he delivered it.

He may give you a lift number, but you should understand that he knows what he is doing (as they all do), and he knows that lift is not much in terms of what you want out of the cam. The other factors are more important in designing a cam for what you want...

Also, you may not here from him this weekend, as I'm sure you know, but expect an email early next week...

Either one of those cam guys know their stuff...