New Cam-give me your opinion/

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J

JohnnyJet

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Heres what I have:

360-Bored .30 over
edelbrock performer RPM intake
J heads
TTI headers
4-speed manual trans
flowmaster 40 series


I want a lil rumble at idle nothing too drastic. Not a drag car more of a street crusier with a lil attitude. Tell me the cam manuf and the specs you all think would be best and Ill see if it matches up with what I have picked out.
 
Comps Cams 268 extreme energy - XE298-H

In: 268 dur .477 lift
Ex: 280 dur .480 lift

this will make an awesome street machine with what you already have
 
do you have adjustable rockers yet?

That will make a difference,
what rear gear ratio?
 
agree with Sanguine, xe268, got it in mine....is a nice lopey cam and is easy to drive with....produces nice power, should work great with your combo, which is similar to mine.

-RPM
 
3.23 rear

Non adjustable rockers
will get lifters to match .

The cam I was lookin at IS the xtreme energy cam. I was also thinkin purple cam but Im runnin one now thats way to lopey. its a .284/.284
484/484
 
this is funny, I just got rid of my .284/.484 and put the comp cam in, with my set up I couldnt get much off the line power, but would come in strong and pull strong. With the new cam it evened things out and the driveabilty is so much nicer. That .484 is a nasty stick, think it needs more compression and a drag strip!!

mine is similar to yours.
'74 360
.60 over
9:1comp
eddy RPM intake
J heads with 1.66 and 2.02 valves 3 angle job, double springed
Holley street avenger 780 carb
727 auto trans though
3:91 sure grip
I am using the stock exhaust manifolds currently, which is a killer, but oh well.
2 1/2 inch tubes and flowmaster 40's
a few other do dads, but with the comp cam I am pretty darned happy for what I use the car for.


-RPM
 
The XE268 is a great cam. Worked good with my stock setup, but works even better with my New, old LD340. I can't wait to get a little more converter. With an auto, the stock converter is borderline in my car. Hope this Helps you out.
 
http://store.summitracing.com/partdetail.asp?part=LUN-60401LK&N=700+115&autoview=sku

LUN-60401LK

Basic Operating RPM Range: 1,000-5,500 RPM
Intake Duration at 050 inch Lift: 213
Exhaust Duration at 050 inch Lift: 220
Duration at 050 inch Lift: 213 int./220 exh.
Advertised Intake Duration: 256
Advertised Exhaust Duration: 262
Advertised Duration: 256 int./262 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.454 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.475 in.
Valve Lift with Factory Rocker Arm Ratio: 0.454 int./0.475 exh. lift
Lobe Separation (degrees): 112
 
Ahhhhhhhhhh, I would have went for the next one up.
http://store.summitracing.com/partd...310650+4294908110+4294840106+115&autoview=sku
LUN-60402LK $189.95
Estimated Ship Date: Monday
Warnings Application Suggested Parts Warranty Show All

Brand: Lunati
Product Line: Lunati Voodoo Cam and Lifter Kits
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,400-5,700 RPM
Intake Duration at 050 inch Lift: 220
Exhaust Duration at 050 inch Lift: 226
Duration at 050 inch Lift: 220 int./226 exh.
Advertised Intake Duration: 262
Advertised Exhaust Duration: 268
Advertised Duration: 262 int./268 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.475 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.494 in.
Valve Lift with Factory Rocker Arm Ratio: 0.475 int./0.494 exh. lift
Lobe Separation (degrees): 112
 
I have the XE268H in my 360 and it is a great cam. Pulls hard from below 1500 to 6500 rpm. However, if you are looking for a lope at idle this is not the cam. It idles almost like a stocker at 700-800 rpm with 14"Hg vacuum.
 
Would this be the one? I'd figure with a 110 C-line, it might chop a little bit.
http://store.summitracing.com/partd...400114+4294908110+4294840106+115&autoview=sku

Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,600-5,800 RPM
Intake Duration at 050 inch Lift: 224
Exhaust Duration at 050 inch Lift: 230
Duration at 050 inch Lift: 224 int./230 exh.
Advertised Intake Duration: 268
Advertised Exhaust Duration: 280
Advertised Duration: 268 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.477 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
Valve Lift with Factory Rocker Arm Ratio: 0.477 int./0.480 exh. lift
Lobe Separation (degrees): 110
 
tell ya what, mine does not sound stock lope...see I'll fire it up for ya...

hear it?

I thought I'd be dissapointed going from the .284/.484 because i liked its lope, but I am not dissapointed at all. The xe268 still puts a pound to the ground and virates my teeth at a idle. now this being said, I also have my flowmaster dumped at the rear axle. Still like it though.

oh..I have a 3000 stall conv., it does help.

I was almost sold on the Lunati cams too, nothing wrong with them, but..I spent time on the phone with Comp hotline and they were very informative and NICE. Lunati not so much, so customer service won that debate.

-RPM
 
I ordered the Comp XE262h-10. I haven't installed it or heard it run yet.(the
machine shop still has my crank that needs to be turned) It's .462-.470 lift
with 1.5 rockers (.492-.501 with 1.6) 218-224 @ .050 262-270 advertised.
I was looking at the two Lunati grinds mentioned earlier. I wanted to stay with something around 268 /500 lift, more than stock but not to radical.
I'm putting together a basiclly stock 318 with magnum heads. The bigger
duration numbers tend to give you more of a lopey idle but move the power band up in RPM. The old Crane Fireball cams were that way, lots of duration but not a ton of lift. We used to install them 4 degrees advanced to bring the power band down and they seemed to work good. That was long before degreeing a cam was so important. toolomanmike
 
I have the XE268 cam in my 340 and it has a bit of a lope to it but not really bad like the Mopar purple shaft grinds. I would stay away from the Purple shaft stuff as they are not that good. Talk to Jim at Racer Brown before you do anything. He is Mopar through and through and he will give you exactly what you need. He hooked up my buddy with an awesome street cam and I am just not into changing another cam until I do the stroker kit. He is the man to talk to. Wish I had his phone# right now but maybe google search for racer brown and you may find it. If not then the Comp Cams XE268 will work fine for you.
 
rumblefish360 said:
Would this be the one? I'd figure with a 110 C-line, it might chop a little bit.
http://store.summitracing.com/partd...400114+4294908110+4294840106+115&autoview=sku

Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,600-5,800 RPM
Intake Duration at 050 inch Lift: 224
Exhaust Duration at 050 inch Lift: 230
Duration at 050 inch Lift: 224 int./230 exh.
Advertised Intake Duration: 268
Advertised Exhaust Duration: 280
Advertised Duration: 268 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.477 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
Valve Lift with Factory Rocker Arm Ratio: 0.477 int./0.480 exh. lift
Lobe Separation (degrees): 110
Click to expand...

Yep that's the XE268H. Don't know if it's the 10.6:1 compression I am running but the cam is almost as smooth at idle as stock.

Also, with the 1.6 ratio magnum rockers the lift is .509" / .512".
 
Just thought I would add in on the Lope at idle with the Comp XE268. I was not sure what to expect by just reading threads prior to the time I installed the cam, but I know that in my 69 340, the cam is very far from stock sounding. I feel it is enough that all would hear the cam and think, Wow, that sounds nice, but It is not to far out there that the cam causes driveability issues. I did switch to a LD340, and believe it or not, the new (Old) intake makes the cam that much more wild sounding. I know that sounds like a tall tale, but everyone that has heard the car since the intake swap has said the same thing.
 
I am using the LD340 intake also and with 9.8:1 compression it makes it a bit lopey. Higher compression would smooth it out for sure. Driveability is great.
 
I couldn't be happier with mine from a driveability stand point. It does have more valve clatter than one would expect from a hydraulic cam. Everyone including Comp tells me that is to be expected with such a fast ramp cam.
 
Several things can cause a cam to lope more I've found. Since Dave has a higher compression and more cubic inches his is bound to idle smoother. Different intakes can make a difference too due to fuel distribution. Spark timing at idle affects idle quality also.
 
I don't know about higher compression or lower, but I know your dead on about the cubes. Large cubic inch engines will not only sound , but act different. The cam can be larger without drivabilty problems.
 
Ive run the crane econo power cam with the duration @ .050 figures of 224/234 .467/.494 lift - this is a real nice streetable hot rod cam. Not a new design but one I wouldn't think twice about using again. Used it in a 318 with 360 heads with a 323 and 4spd, worked excellent.
 
A 650 from a 750?
You'll like the throttle response.
 
Nah I checke dthe P O S on the car and is an edelbrock 600. Cant adjust a thing on it. The idle-nope, lean it out-nope, richen er up-nope. Chuck it in the trash-yup. I ordered the cam,lifters and carb today from summit.
 
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