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BB roller cam recommendations #2570056
10/27/18 01:18 AM
10/27/18 01:18 AM
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La.USA
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rick4106 Offline OP
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440 .30 over , 12.1 flat top,indy ez heads by compuflow,dominator,2” headers,1.80 glide,4.88 gear, 32x14,2811 lbs with driver. Foot brake bracket car
Flow numbers 347@700 on intake and 232 @700 on exhaust

Re: BB roller cam recommendations [Re: rick4106] #2570082
10/27/18 02:02 AM
10/27/18 02:02 AM
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I would look for a cam with between 260 and 270 @ .050 with as much lobe lift that you can get and have it ground on a 108 LSA and install it between 103 and 105 ATDC on the intake lobes up twocents
Make sure and get enough spring pressure and stiff enough pushrods to go to 8000 RPM up
Take the time to test shifting the motor between 5500 in 500 RPM increments up to 8000 RPM and then shift at the RPM that makes you happy scope up grin

Last edited by Cab_Burge; 10/27/18 02:03 AM.

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Re: BB roller cam recommendations [Re: rick4106] #2570121
10/27/18 09:39 AM
10/27/18 09:39 AM
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BradH Offline
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Max Wedge or standard ports?

What's the peak RPM the engine sees on the track?

What's the converter stall speed?

Re: BB roller cam recommendations [Re: BradH] #2570152
10/27/18 11:26 AM
10/27/18 11:26 AM
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So. Burlington, Vt.
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Originally Posted By BradH
Max Wedge or standard ports?

What's the peak RPM the engine sees on the track?

What's the converter stall speed?


And, what rockers arms...... and what ratio?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: BB roller cam recommendations [Re: rick4106] #2570175
10/27/18 12:59 PM
10/27/18 12:59 PM
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merpar Offline
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If that's a stock 440 block. Get a cam that won't need a lot of rpm. A 440 block won't take 8000 rpm very long. I wouldn't run it over 7000 rpm.

Re: BB roller cam recommendations [Re: rick4106] #2570186
10/27/18 01:32 PM
10/27/18 01:32 PM
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2800 lb car with 4.88 gears gives you a lot of flexibility on the cam. I'd be interested in knowing in how much power you're trying to make and if you want to get aggressive with the cam or have something that goes rounds without any maintenance.

If it was my car I'd probably use a street roller like the XR292R from Comp. That should make good power in a 440 with 12:1 compression and EZ heads without beating up the valve springs. I'm assuming 1.5 rocker arms?

Re: BB roller cam recommendations [Re: AndyF] #2570189
10/27/18 01:40 PM
10/27/18 01:40 PM
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Originally Posted By AndyF
2800 lb car with 4.88 gears gives you a lot of flexibility on the cam. I'd be interested in knowing in how much power you're trying to make and if you want to get aggressive with the cam or have something that goes rounds without any maintenance.


this is approximately the combo my 1933 dodge panel project will end up [with me in it], but i will be using 32/33" tires, and looking for mid level maintenance.
beer

Re: BB roller cam recommendations [Re: rick4106] #2570230
10/27/18 03:05 PM
10/27/18 03:05 PM
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This is close to my combo also. I'm running a .030 over 440, compuflow ez-1's at basically the same flow you have. The difference is I have 13:1 and a 727. Also weigh about 3400 w/ me. I run the old .690 comp roller. I believe it's 282 @ .050. I've put 3 passes on it so far. No tuning and it went a best 10.24 @ 132. Rear is dana 4.89 w/ 33 x 14.5 slicks. Shifting at 6500.

Re: BB roller cam recommendations [Re: rick4106] #2570236
10/27/18 03:21 PM
10/27/18 03:21 PM
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rick4106 Offline OP
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Hs 1.5 harland sharps and max wedge port.
Only made couple of passes with .650 lift 290@.050 old comp solid. 6.35@108.9.97@131 in 1/4.

Last edited by rick4106; 10/27/18 03:23 PM.
Re: BB roller cam recommendations [Re: rick4106] #2570257
10/27/18 04:14 PM
10/27/18 04:14 PM
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290@050 is way too big for your combination. That cam is killing the torque and slowing you down. Sometimes bigger is not better. I think the 292 street roller would work or you could go one size bigger with a 260@050 intake lobe.

Looks like you're crossing the stripe at roughly 7000 rpm with those gears. With a better cam you should be going faster so you most likely will need to drop the rear gear down to 4.56 or even a 4.30.

A 440 with ported EZ heads and 12:1 compression should make 650 to 700 hp if you have a good intake manifold. That would put you into the low 9's at 140+ mph if the chassis is decent. So I'd gear the car to go 7000 rpm at 145 and then pick a cam that puts peak power around 6800 rpm. 260 @ 050 should be in the ballpark. Probably need 5000+ stall on the converter but I'm no expert there.

Last edited by AndyF; 10/27/18 04:15 PM.
Re: BB roller cam recommendations [Re: rick4106] #2570263
10/27/18 04:18 PM
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Originally Posted By rick4106
Hs 1.5 harland sharps and max wedge port.
Only made couple of passes with .650 lift 290@.050 old comp solid. 6.35@108.9.97@131 in 1/4.


I run an Isky solid roller in my 470 low deck with home ported rpm's and .680-.660 and 276-281 @ .050 and it has many street miles and a few passes with a 6.15 @ 112+ so far on crap QTP's.............


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: BB roller cam recommendations [Re: rick4106] #2570268
10/27/18 04:41 PM
10/27/18 04:41 PM
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My mate's 440 Dart made 600hp with 320cfm Eddy's, old .590 sft purple@12.5:1, 1050 Dom etc. Working on your no's, 2811lbs/9.97@131 your only making 560hp, something wrong, you should be up in the 640+hp range with those speccs, I don't think its the .290@.050 cam personally....I made 530hp with that cam@9.8:1 an 850DP and 260cfm 906's back in the day.

Last edited by rb446; 10/27/18 04:48 PM.

1969 'Cuda 446ci, best 9.96@133.9 in 1990
1971 340 'Cuda, best 11.01@122.8 in 1987
Re: BB roller cam recommendations [Re: rick4106] #2570281
10/27/18 05:13 PM
10/27/18 05:13 PM
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rick4106 Offline OP
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Yes something in the combo is not working. My dart has a 446 with Sr heads that flow 290 and has a .557 mopar cam, speed pro pistons and a 750 carb. That car runs 6.60s @ 3300

Re: BB roller cam recommendations [Re: rick4106] #2570333
10/27/18 08:08 PM
10/27/18 08:08 PM
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Originally Posted By rick4106
Hs 1.5 harland sharps and max wedge port.
Only made couple of passes with .650 lift 290@.050 old comp solid. 6.35@108.9.97@131 in 1/4.

My perspective is a bit simplistic, but MW ports, that much duration, and only 450-ish cubes is killing your torque.

Add my vote to those who are suggesting you should try something 20 to 30 degrees smaller. If you're going to switch to a roller, you might even be able to pick up some lift, too.

Re: BB roller cam recommendations [Re: rick4106] #2570399
10/27/18 10:37 PM
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The 290/.650 cam was designed to move air in and out of cast iron heads. The Indy heads don't need that much duration, it just makes the engine lazy. Put a smaller cam in there and the engine should perk up. Before you tear it apart check the cranking compression and then recheck it with the new cam. You'll most likely need to change your ignition curve and re-jet the carb too since the smaller cam will make the engine more efficient. Take a note of your manifold vacuum at idle before and after. It should go up by a bunch.

Re: BB roller cam recommendations [Re: rick4106] #2570406
10/27/18 11:11 PM
10/27/18 11:11 PM
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While I’ve never been a big fan of the 650/290 solid, it did have its place.
But imo that place isn’t MW sized Indy heads on a 440.

That being said, I think the xr292r is too much of a step in the other direction.
Sure, it’ll work okay......... but I don’t feel that cam in that combo is going to make the best use of a roller set up in a 12:1 bracket car with decent heads.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: BB roller cam recommendations [Re: fast68plymouth] #2570414
10/27/18 11:40 PM
10/27/18 11:40 PM
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I'd been thinking my COMP RX 265 / .650 / 108 might be a good choice, or something close to it. Wasn't sure if the OP's MW ports vs my standard ports made it less of a viable option. shruggy

Re: BB roller cam recommendations [Re: rick4106] #2570552
10/28/18 12:22 PM
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1969 'Cuda 446ci, best 9.96@133.9 in 1990
1971 340 'Cuda, best 11.01@122.8 in 1987
Re: BB roller cam recommendations [Re: rb446] #2570616
10/28/18 03:32 PM
10/28/18 03:32 PM
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That would most likely work better than what the OP has now but my guess is that it is still 10 degrees too big. I tried a 270@050 cam in my 470 with TF heads and it was too big. That engine worked best with cams in the 260 range. The OP engine is a little smaller but has a bit more compression. My guess is the OP's engine will work best with a cam in the 260's.

Re: BB roller cam recommendations [Re: AndyF] #2570638
10/28/18 04:15 PM
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Looks like it's laying down after the first 1/8...mph is down alot compared to the 1/8 mph.

What does it 60ft.? Fuel system?


Brian Hafliger
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