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Help me choose a cam???

Posted By: moparAL

Help me choose a cam??? - 11/23/20 02:35 AM

Hello everybody,
I need advice on choosing a hydraulic roller cam. Here is what I have.

1. 70 Challenger, 3.55 gears, limited slip differential, 4 speed HD overdrive (3.06, 1.63, 1.00, .70) Keisler automatic transmission, 512 cu inch stroker motor, fuel injection, 1 3/4 TTI headers, TF 240 aluminum heads, some fiberglass and lots of aluminum parts Still some parts to get. I will choose a lockup converter after buying a camshaft.

2. Usage, street racing, street driving, going to the drag strip every couple of months, some autocross events.

3. It will be driven on the street, 2 maybe 3 times a week.

I have looked at several cams what do you think.

Crane 689531 234-242 @.50 539/558 lift 112 lobe separation
Crane 689321 230-236 @50 528/539 lift 112 lobe separation

Lunati 20230712 231-239 @50 535/550 lift 110 lobe separation

Comp Cam 23-711-9 230/236@50 541/537 lift 110 lobe separation
Comp Cam 23-712-9 236/242@50 544/541 lift 110 lobe separation

Howard Cams 723445-10 235/241@50 545/545 lift 110 lobe separation

What do you think? Any questions or sugestions? There are A LOT of Super Smart people here on Moparts and I value your opinions.


Thanks,

AL
















Posted By: Brian Hafliger

Re: Help me choose a cam??? - 11/23/20 03:23 AM

240-250@ .050 on a 113 lca.
Posted By: moparAL

Re: Help me choose a cam??? - 11/23/20 04:04 PM



bump
Posted By: Cab_Burge

Re: Help me choose a cam??? - 11/23/20 07:20 PM

Originally Posted by moparAL
Hello everybody,
I need advice on choosing a hydraulic roller cam. Here is what I have.

1. 70 Challenger, 3.55 gears, limited slip differential, 4 speed HD Keisler automatic transmission, 512 cu inch stroker motor, fuel injection, 1 3/4 TTI headers, TF 240 aluminum heads, some fiberglass and lots of aluminum parts Still some parts to get. Will choose converter after buying a camshaft.

2. Usage, street racing, street driving, going to the drag strip every couple of months, some autocross events.

3. It will be driven on the street, 2 maybe 3 times a week.

I have looked at several cams what do you think.

Lunati 20230712 231-239 @50 535/550 lift 110 lobe separation

What do you think? Any questions or sugestions? There are A LOT of Super Smart people here on Moparts and I value your opinions.


Thanks,

AL

I would probably use the Lunati installed 4 to 6 degrees advance on the intake lobes and I would put a set of two inch headers on that motor also so it can breath and not be choked down in the upper, above 4500 RPM , range twocents
I'm thinking that cam and headers will probably make peak torque between 4000 up to 5000 RPM and peak HP between 5500 to 6300 RPM so shifting it at or around 6300 to 6600 RPM should set you back in the seat hard enough to make you either grin or cringe devil whistling
the 1 3/4 inch are two small, make the rest of the exhaust system 3.0 or larger also up
Posted By: viperblue72

Re: Help me choose a cam??? - 11/24/20 07:02 AM

Although it’s more aggressive than your choices, I have the Trickflow cam in a 440 in a ramcharger.
I’ve never been more impressed from a cam swap. It has a very wide torque curve and pulls hard from 2500-6500.
It pulls harder down low even than the 230@050 on 112 cam I pulled out.
The specs on it are 243/247 .600/.600 on 108. In a 511 it would be a kitten and make awesome power.
Posted By: gregsdart

Ring the OD cruise rpm up toRe: Help me choose a cam??? - 11/24/20 11:23 AM

Originally Posted by ou812
240-250@ .050 on a 113 lca.

I am guessing that the wide lca is to make the cam compatible with the O.D. and lockup/3.55 rear gear? If i read it right, the kiesler trans uses a lockup converter? That would make for a tough cam selection?
Speculating hear that the trans has a 4th gear od of .70 and a 28 inch tall tire. That would provide 1800 rpm at 60 mph. If you can go deeper rear gears, like 4.10 or 4.30 to bring the O.D. cruise rpm up to 2200 to 2400 it would allow a much faster combo. I agree on the header change. 2 inch tubes with a long collector backed by an expansion chamber and really good flowing mufflers into 3 inch.
Posted By: moparAL

Re: Ring the OD cruise rpm up toRe: Help me choose a cam??? - 11/24/20 02:55 PM

bump
Posted By: ek3

Re: Ring the OD cruise rpm up toRe: Help me choose a cam??? - 11/25/20 05:25 AM

what compression ratio ? piston type? chamber style ? all those cams may be a little small unless its a low compression deal. a 512 stroker eats a lot of cam. a 112 and up lsa will tame the idle some... better than stock heads will like more cam also.. tall gears are no issue for the torque monster! a wide power band from 2600- 6000 rpm is where this combo lives anyhow... torque will not be an issue and with aftermarket heads you will keep some power up top... in the end it will come down to intake opens and exhaust closing events ....
Posted By: ek3

Re: Help me choose a cam??? - 11/25/20 05:29 AM

Originally Posted by moparAL
Hello everybody,
I need advice on choosing a hydraulic roller cam. Here is what I have.

1. 70 Challenger, 3.55 gears, limited slip differential, 4 speed HD overdrive (3.06, 1.63, 1.00, .70) Keisler automatic transmission, 512 cu inch stroker motor, fuel injection, 1 3/4 TTI headers, TF 240 aluminum heads, some fiberglass and lots of aluminum parts Still some parts to get. I will choose a lockup converter after buying a camshaft.

2. Usage, street racing, street driving, going to the drag strip every couple of months, some autocross events.

3. It will be driven on the street, 2 maybe 3 times a week.

I have looked at several cams what do you think.

Crane 689531 234-242 @.50 539/558 lift 112 lobe separation
Crane 689321 230-236 @50 528/539 lift 112 lobe separation

Lunati 20230712 231-239 @50 535/550 lift 110 lobe separation

Comp Cam 23-711-9 230/236@50 541/537 lift 110 lobe separation
Comp Cam 23-712-9 236/242@50 544/541 lift 110 lobe separation

Howard Cams 723445-10 235/241@50 545/545 lift 110 lobe separation

What do you think? Any questions or sugestions? There are A LOT of Super Smart people here on Moparts and I value your opinions.


Thanks,

AL















a 3:06 first gear .... seems like you will leave all the torque behind to me.....this want be a hi reving rig ? just my thoughts rite there !
Posted By: moparAL

Re: Help me choose a cam??? - 11/26/20 03:03 PM

bump
Posted By: moparx

Re: Ring the OD cruise rpm up toRe: Help me choose a cam??? - 11/26/20 08:08 PM

Originally Posted by gregsdart
Originally Posted by ou812
240-250@ .050 on a 113 lca.

I am guessing that the wide lca is to make the cam compatible with the O.D. and lockup/3.55 rear gear? If i read it right, the kiesler trans uses a lockup converter? That would make for a tough cam selection?
Speculating hear that the trans has a 4th gear od of .70 and a 28 inch tall tire. That would provide 1800 rpm at 60 mph. If you can go deeper rear gears, like 4.10 or 4.30 to bring the O.D. cruise rpm up to 2200 to 2400 it would allow a much faster combo. I agree on the header change. 2 inch tubes with a long collector backed by an expansion chamber and really good flowing mufflers into 3 inch.



greg, what do you mean, "expansion chamber" ? TIA.
beer
Posted By: Brian Hafliger

Re: Ring the OD cruise rpm up toRe: Help me choose a cam??? - 11/27/20 10:15 PM

Originally Posted by gregsdart
Originally Posted by ou812
240-250@ .050 on a 113 lca.

I am guessing that the wide lca is to make the cam compatible with the O.D. and lockup/3.55 rear gear? If i read it right, the kiesler trans uses a lockup converter? That would make for a tough cam selection?
Speculating hear that the trans has a 4th gear od of .70 and a 28 inch tall tire. That would provide 1800 rpm at 60 mph. If you can go deeper rear gears, like 4.10 or 4.30 to bring the O.D. cruise rpm up to 2200 to 2400 it would allow a much faster combo. I agree on the header change. 2 inch tubes with a long collector backed by an expansion chamber and really good flowing mufflers into 3 inch.


It's just the numbers I feel would give him what he's looking for and spread the power out so it's not so over powering down low.
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