Re: Everyones Favorite Topic CAM Choices
[Re: cudatom]
#2489828
04/30/18 05:28 AM
04/30/18 05:28 AM
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Joined: Jan 2003
Posts: 3,842 N.E. Ohio
6bblFLASH
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,842
N.E. Ohio
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I can't argue with that. I will have to talk to Mike. I have a month or so before I have to start assembly.
70` Cuda`,440 6BBL Jerico,Dana 4.56 Still on 93 Pump Gas 9.87 @ 136/1.31-60ft.`09 Mopar Nationals PASSON PERFORMANCE "Stick-Shift" Champ! 2013 StickShift Challenge Winner@ Mopar Nationals!
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Re: Everyones Favorite Topic CAM Choices
[Re: cudatom]
#2489956
04/30/18 01:38 PM
04/30/18 01:38 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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... was it was hard on springs. They were shot after 150 runs... That's one of those trade-offs w/ using most -- if not all -- of the fast-rate-of-lift .904" flat-tappet profiles. The .875"-type SFT I ran on the street was much easier on springs and still ran hard. Faster isn't always better. Never have been sure how "big" that COMP 290/.650 SFT really is compared to other cams. By the time you factor in the recommended .030" lash (IIRC), it's going to loose a lot of effective duration, not to mention .030" net lift over advertised. I know they SOUND big at idle, but...
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Re: Everyones Favorite Topic CAM Choices
[Re: cudatom]
#2489976
04/30/18 02:10 PM
04/30/18 02:10 PM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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it was hard on springs. They were shot after 150 runs. I ran the springs that Hughes told me to run, Ive ran the hughes springs on a standard MP cam and they were done after one summer, maybe 50 runs. On a faster lift ramp, they would even be worse. Hughes springs suck IMO
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Re: Everyones Favorite Topic CAM Choices
[Re: 6bblFLASH]
#2490698
05/02/18 12:15 AM
05/02/18 12:15 AM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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What heads? Std port window? 1.5 or 1.6 rockers? Stage 6 STD.port window. I have 1.5 and 1.6 rockers Dwayne/Fast, Kind of interested on your thoughts on this.
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Re: Everyones Favorite Topic CAM Choices
[Re: 6bblFLASH]
#2490806
05/02/18 10:19 AM
05/02/18 10:19 AM
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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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I ran the Comp 290/650 in my 3000lb all iron 440+6 bottom end based Cuda, 14x32's/4.88's/4800 stall/Ladders/coils.. albeit without really enough CR (10:1)as the planned 12.5:1 upgrade never happened but it still ran great, I liked it a lot, ticked over at 900rpm, seemed quite docile to me and it pulled really strong at the top end, I just needed more cyl head to make decent power, think you'll like it in your combo.
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: Everyones Favorite Topic CAM Choices
[Re: 6bblFLASH]
#2490965
05/02/18 04:36 PM
05/02/18 04:36 PM
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Joined: Jul 2010
Posts: 2,422 Pittsburgh PA
Eric
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
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I have the Comp 23-634-5 stick in the Arrow. It's the .650/.630 split cam...before that I had the .650 ......so far so good. Pulls well and the car is deadly consistent.
5.53 @ 125 1/8th on the launch control..more left in her!
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Re: Everyones Favorite Topic CAM Choices
[Re: 6bblFLASH]
#2491149
05/02/18 10:38 PM
05/02/18 10:38 PM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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I can't argue with that. I will have to talk to Mike. I have a month or so before I have to start assembly. No way no how would I run the comp 290/650 lift with your 11.1 combo. Oh yes, it can be argued. It will run no faster then using a mp .590 I bet, with a lot less manors. kinda like Brad h pointed out. His cams were even smaller. No on the MP .620 No on the comp. 290/.650
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Re: Everyones Favorite Topic CAM Choices
[Re: 6bblFLASH]
#2491224
05/03/18 12:31 AM
05/03/18 12:31 AM
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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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Use the .620 w/1.6 rockers = .661/275+@.050 with your weight/tyre/theoretical hp combo and 4.56's you'll be turning around 7k in the traps with slip, 4.88 will be near 7500 which would test even that cams abilities at the stripe.....2c's you could also have a read of this talking about the 290/650> https://board.moparts.org/ubbthreads/ubbthreads.php/topics/889058/2.html
Last edited by rb446; 05/03/18 12:42 AM.
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: Everyones Favorite Topic CAM Choices
[Re: rb446]
#2491243
05/03/18 12:53 AM
05/03/18 12:53 AM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
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master
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Posts: 6,591
Canton, Ohio
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Use the .620 w/1.6 rockers = .661/275+@.050 with your weight/tyre/theoretical hp combo and 4.56's you'll be turning around 7k in the traps with slip, 4.88 will be near 7500 which would test even that cams abilities at the stripe.....2c's you could also have a read of this talking about the 290/650> https://board.moparts.org/ubbthreads/ubbthreads.php/topics/889058/2.html His engine is a 4.15 ,11.1 stroker. Its sweet spot wont be anywhere near 7000rpm to 7500rpm. I will say it one more and last time, throw that mp .620 away.
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Re: Everyones Favorite Topic CAM Choices
[Re: 6bblFLASH]
#2491247
05/03/18 12:56 AM
05/03/18 12:56 AM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Putting together a new engine combo. 4.15 stroke,6.76 rod,4.32 bore 487 cu.in. Heads flow 330 cfm at .700 6bbl. carbs. All three intakes to experiment with. Edelbrock,Weiand SS.and STR. Compression 11.18. Automatic 727 NO brake. Two converters in hand 8"ATI 5,500 Dynamic 9" 5,000. Gears 4.88 or 4.56 32.5" tire,,,,ladder bars-coil overs. 3,000lbs w/driver
Have a .590 best et. 9.87 3.75 stroke 440.
also have 620.MP. cam. I have never tried it. Roller isn`t a good value for me,would rather go with a solid for now. Maybe a couple years down the road.
{
So what cam is a good blend of performance and reasonable durability? } For what you have in your corral, the MP .590
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Re: Everyones Favorite Topic CAM Choices
[Re: 6bblFLASH]
#2491385
05/03/18 11:42 AM
05/03/18 11:42 AM
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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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Well you may be correct, however I was basing my opinions on his 3000lbs/4.56/32.5" tyre combo and his 487ci and expected flyhp which should be in the 660hp range in which case he WILL be trapping at around 7k w/slip.
From my experience with that .590 cam on a friends 440 Dart with 12.5:1, 4.56/31's and similar cfm heads as the op and with a 1050 Dom, 5000 stall, the car would slow if shifted over 6300 and it was done at 6750 in the traps, with the ops bigger stroke@487ci he has it won't help in my opinion.
If a change was made to 4.30 gearing then yes perhaps it would work, but he has run that cam in a 440 and was asking for an improvement I believe with the new combo....Anyways I'm sure he will be in the 9.5's or better.
Last edited by rb446; 05/03/18 11:45 AM.
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: Everyones Favorite Topic CAM Choices
[Re: 6bblFLASH]
#2492756
05/06/18 12:41 PM
05/06/18 12:41 PM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,515
So. Burlington, Vt.
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For the record, I like the MP620 cam in something with small-ish heads, a lot of stall, a car thats not too heavy, 1.5 rockers......and at least 13:1cr. As measured, it's 283@.050....... So it's a big cam. That being said, there's almost always going to be something I like better for any given combination.
I generally prefer some upper rpm stability over super fast ramps, unless there is a "need" to get every last HP out of the build.
For the OP's proposed combo, I'd use something around 270@.050, and stable lobes where you could maintain decent valvetrain control to 7000 or so, running 1.6 rockers with "normal" spring loads(150/375-400). Lift with 1.6's would be low/mid-.600's
A fast rate .904 cam would likely make a few hp more, but will be a bit tougher on parts.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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