Re: BB roller cam recommendations
[Re: rick4106]
#2570082
10/27/18 02:02 AM
10/27/18 02:02 AM
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Joined: Aug 2003
Posts: 43,174 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,174
Bend,OR USA
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Last edited by Cab_Burge; 10/27/18 02:03 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: BB roller cam recommendations
[Re: BradH]
#2570152
10/27/18 11:26 AM
10/27/18 11:26 AM
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Joined: Jan 2003
Posts: 14,498 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,498
So. Burlington, Vt.
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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? And, what rockers arms...... and what ratio?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: BB roller cam recommendations
[Re: rick4106]
#2570236
10/27/18 03:21 PM
10/27/18 03:21 PM
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Joined: Feb 2013
Posts: 84 La.USA
rick4106
OP
member
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OP
member
Joined: Feb 2013
Posts: 84
La.USA
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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.
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Re: BB roller cam recommendations
[Re: rick4106]
#2570257
10/27/18 04:14 PM
10/27/18 04:14 PM
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Joined: Jan 2003
Posts: 31,034 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,034
Oregon
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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.
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Re: BB roller cam recommendations
[Re: rick4106]
#2570263
10/27/18 04:18 PM
10/27/18 04:18 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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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. 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.....
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Re: BB roller cam recommendations
[Re: rick4106]
#2570268
10/27/18 04:41 PM
10/27/18 04:41 PM
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Joined: Oct 2015
Posts: 570 UK
rb446
mopar
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mopar
Joined: Oct 2015
Posts: 570
UK
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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
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Re: BB roller cam recommendations
[Re: rick4106]
#2570333
10/27/18 08:08 PM
10/27/18 08:08 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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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. 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.
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Re: BB roller cam recommendations
[Re: rick4106]
#2570406
10/27/18 11:11 PM
10/27/18 11:11 PM
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Joined: Jan 2003
Posts: 14,498 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,498
So. Burlington, Vt.
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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
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Re: BB roller cam recommendations
[Re: AndyF]
#2570638
10/28/18 04:15 PM
10/28/18 04:15 PM
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Joined: Jan 2003
Posts: 5,485 SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,485
SoCal
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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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