Re: 470 dyno test article
[Re: 383man]
#2433785
01/13/18 07:40 AM
01/13/18 07:40 AM
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Joined: Aug 2003
Posts: 8,793 Mt.Gilead, Ohio
OhioMopar
master
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master
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Mt.Gilead, Ohio
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Wow Andy you do know how to get awesome power from your Mopars !! Ron Thanks Ron. Not sure I really know in advance how to make power but if you try enough things eventually some stuff works. I chased my tail with rocker arm ratios and cam grinds and crappy intake manifolds and spacers that didn't work and all of that stuff. First pull with the 470 was 620 hp so we've found 150 hp over the past 18 months. And us Mopar people do thank you as you do alot of work in testing parts and letting us know what works in many combo's and myself I thank you. I really enjoy reading about your dyno' runs. Ron I second that.
1969 Dart GTS 340 1969 Coronet R/T X9 N-96 1999 Dodge Dakota R/T RC 2015 Dodge Dart GT 2019 Ram 2500 Big Horn
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Re: 470 dyno test article
[Re: AndyF]
#2435143
01/15/18 07:08 PM
01/15/18 07:08 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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So. Burlington, Vt.
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It's too bad the pressures aren't more in line with the advertised specs. I was looking forward to seeing if that spring design could really keep everything under control with only 150 on the seat.
At 205/660, while that's still less than I would normally use with that new cam, it's not as low as its "supposed" to be.
But if all goes well...... I could see trying them in something.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 470 dyno test article
[Re: AndyF]
#2436100
01/17/18 01:36 AM
01/17/18 01:36 AM
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Joined: Jan 2003
Posts: 1,807 Mopar Country, Mi
ccdave
The Ultimate
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The Ultimate
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Mopar Country, Mi
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Yeah I think they are a great spring, only issue is that they are little on the expensive side. I don't fully understand the difference between 150 in the catalog and 205 when measured. I think it is due to the step on the locator and the retainer but Comp should know about that.
Comp does say that conical springs can be run with much less pressure than normal straight springs but they don't provide any more guidance than that. The engineer I talked to said these springs would work just fine with this cam profile but he didn't say why he felt that way. I know they have done a lot of Spintron testing with these conical springs so I'm guessing that someone knows what works and what doesn't but they didn't pass that knowledge on to me! Still a lot of uncertainty and doubts with both beehive and conical springs. I have seen these new era springs being used on LS platforms making north of 700 horsepower with ZERO issues. I hope the springs perform well for you in that if they exceed your expectations some of the uncertainty and doubts will slowly disappear because these new spring designs are way better than traditional dual springs.
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Re: 470 dyno test article
[Re: AndyF]
#2453170
02/17/18 07:35 PM
02/17/18 07:35 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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Do you have any pulls with the current heads/intake/carb with the previous cam and no vacuum pump?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 470 dyno test article
[Re: AndyF]
#2453175
02/17/18 07:53 PM
02/17/18 07:53 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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In general terms, faster is bigger.....as far as how the motor sees it.
At least, that's how I always looked at it.
So....... If you would have thought a "bigger" cam than the previous one would have been better with the motor in its current configuration ...... Then "faster" is a step in that direction.
If you wanted to see if the combo will respond to more (hi lift)area under the curve, without really going bigger....... Then a commensurate reduction in duration would accompany the added rate.
You probably haven't really made any representative pulls yet though, so the jury is still out on the new cam. It might be safe to say though, that "big gains" aren't in the cards.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 470 dyno test article
[Re: AndyF]
#2453247
02/17/18 11:06 PM
02/17/18 11:06 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
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What RPM is the motor seeing peak HP at? I had one roller cam motor that would stop gaining HP for three hundred RPM and then take off again and finally peak at 800 RPM higher
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 470 dyno test article
[Re: AndyF]
#2453530
02/18/18 04:40 PM
02/18/18 04:40 PM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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My “armchair quarterback” response is........I would have installed the new cam at the same c/l as the previous cam.
I watched the video.......and that does look like a ton of oil coming to the top. Although, in all fairness.......I’ve never run anything with a clear v/c.......so I don’t really have anything to compare to. It just “seems” like that’s a lot of oil up top.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 470 dyno test article
[Re: AndyF]
#2453770
02/19/18 02:43 AM
02/19/18 02:43 AM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
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I Live Here
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I’ll be a bit surprised if a little cam advance doesn’t help to some degree.
Though, when the heads have low lift flow as good as TF heads do, it’s easier to open the valve too early.
My starting point still would have been to use the same c/l, just to eliminate the variable.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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