Seagram's 72

iTrader: (2)

I have been searching on and off for a while for a cam selection thread that fits my car and I cannot find a good match.

Here is what I have:
Car: Chevelle
Tranny: 200-4r reverse manual valve body, 3000 rpm stall
Rearend: 4.10 posi

Motor:
-03' LQ4
-Stock rotating assembly
-Z06 243 Heads
-Stock Cam
-Edelbrock Dual Plane (Yah dual plane, deal with it!)
-750 vac secondary swap meet turd carb
-MSD 6010 Box

I use the car for cruising and taking it out for a beat down occasionally (usually what cruising turns into), it does not see track time. I hope to hit the dyno this summer and maybe carve some corners. I am adding a small shot of spray, but do not want to cam it specifically for that.

This isn't a daily driver and I liked my previous motors with a lopey idle. I am trying to maximize the bottom end for that off the line punch, I don't take it above 5-6 too often. Also, not looking to have any pistons cut or other major engine mods for this.

What cam would you recommend?

I am prefering an off the shelf grind because I am looking to pick up something used or that has been proven.

Also, I have a 4150 850HP Double Pumper I recently picked up at a swap meet, is that too big? I was originally planning on a run of the mill 750 dp.

Thanks for the input

xpndbl3

iTrader: (23)

224ish cam with that low stall

99 Blue Bird

iTrader: (3)

maybe a street sweeper ht cam from New Era Performance might do well. not too much duration and its cut on a 111lsa.

edit- just to give u full spec its a 228/232 .612 / .600 on a 111

ZONES89RS

iTrader: (25)

^I can agree with that, something high 220s on the intake and low 230s was what i was going to say, but the 224 xpndbl3 recommended will cruise a bit nicer with lock up.

speedtigger

iTrader: (16)

I am going to go a completely different way with my cam suggestion because I am hearing something different that the others from your intended use.

If I am hearing you correct, you want spend most of your time in the car cruising and you want the hot rod type idle, but do not like to rev the motor. Is this correct?

If this is correct, I would say you need a cam with narrow lobe separation and moderate lift and duration. This will give you that hotrod sound while going easy on the valve train, a low torque peak and keep the RPM down.

The first thing that comes to mind is the "Thumpr" series from Comp Cams. This one has a lower powerband and a choppy thumping idle:

HYDRAULIC ROLLER − Thumpr™ − High
performance street, stock converter ok,
best with 2000+ converter and gears,
choppy/thumping idle.
Hyd. Hyd. 2000 to 6400
54-600-117
275THR9
275 / 295
219 / 233
.553 / .536
109°

ramdaspadhye

iTrader: (3)

I'd go with the hotcam simply due to its extreme flat torque curve. Can't go wrong with it.

Seagram's 72

iTrader: (2)

Thanks for the suggestions...

These seem to be mentioned often on the forum. I am going to search a few builds with a similar cams.

These have caught my eye, I am going to look for a build with one. I hope it has the bite to go with the bark though. I would like to see an LS build with this before I buy.

I have heard good and bad things about the Hot Cam, this was my original plan though.


Keep em coming, I will let you know what I go with and I hope to get some pictures up soon.

What size carbs are you guys running? I'm still on the fence on whether to dump my 850HP and get a 750 or keep the 850. I don't want to dial down too big of a carb for the motor.

ramdaspadhye

iTrader: (3)

I've got an 825 bg demon... 750 will be fine for what you're wanting to do.

ZONES89RS

iTrader: (25)

Thumpr cams seem to be oriented for sound over power. I dont know anyone serious running one.

speedtigger

iTrader: (16)

The comp cams rep told me that the LS motors really prefer wider lobe separation such as 112-114 to make maximum power. However, if you want your power to come in lower and sooner, you either have to narrow your lobe separation or reduce your duration. The only way I know of to have low end power and a lumpy idle is to narrow the lobe separation.

Another cam custom designed to give a hot rod sound but not stretch the RPMs or stress the valve train is an Edelbrock Hot Rod cam. Here are the specs

#2215

ENGINE: LS1/LS2 (97-Later)
RPM RANGE: 1500-6500

Duration at 0.006" Lift: Intake: 300° Exhaust: 300°
Duration at 0.050" Lift: Intake: 220° Exhaust: 224°
Lift at Cam: Intake: 0.300" Exhaust: 0.300"
Lift at Valve: Intake: 0.510" Exhaust: 0.510"
Timing at 0.050" lift: Open Close
Intake: 2° BTDC 38° ABDC
Exhaust: 44° BBDC 4° BTDC
Centerlines: Lobe Separation - 111° Intake Centerline - 108°

There is an article and dyno test of this camshaft and carb set up that makes 410HP here:
http://www.superchevy.com/technical/...ion/index.html

ramdaspadhye

iTrader: (3)

Go with the hotcam or have EPS custom spec you one for 25 bucks. Ya can't go back with the hotcam with carb, tried and true, but if you want to get the most out of it and still sound mean, def go with a custom one.

Seagram's 72

iTrader: (2)

Thanks for the posts guys, I have been busy cam shopping.

Does anyone run an MS3 and if so, how good is it on the low/ midrange? A guy locally is selling one.

Is there something I should look for in an LSA (110, 112, 116...) for a carb or a difference in duration (intake and exhaust seperation)?

scooby64

good thread

HPM

+1, the thumper cams make great power.

As far as LSA, go with something in the 110-112 range with a carb.