new SFT for the 511
#2781394
06/04/20 01:52 PM
06/04/20 01:52 PM
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Joined: Jan 2007
Posts: 8,042 Mt Morris Michigan
mopar dave
OP
master
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OP
master
Joined: Jan 2007
Posts: 8,042
Mt Morris Michigan
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My combo: 511 12.5:1 with MW Edelbrock heads CNC ported flowing 350@.700. Indy 400-3 ported with and 1100 thumper Dominator. 8" vert 5400 stall, 4.10, 28" tire and 3380# foot brake. Current cam is a comp SFT 270/276 .645/.615 110. Ran a best od 10.06@134mph. Looking at 2 different cams to go with 2 different cam matching theories. First theory is that first 330ft at track are the most important, so I would think a torquer cam would be best, so here it is. Ultradyne 294/298 267/271 650/620 108 lash .016/.016(@.200 lift 185/188) my current cam is 180/186@.200 My second theory is why would low end grunt matter because the vert stalls at 5400 and never drops below 6000 going down the track. So, here's that cam, Comp 324/324 290/290 650/650 108 lash .028/.026 (@.200 lift 200/200). I was told this is an old HM cam. Street/strip deal. The 290 sounds way over cammed with 12.5:1 . Jim who goes real fast on flat tappets says nothing over 270@50 or its over cammed with 12.5:1 and i'm sure he's correct in this. Just thought I might get a few opinions on this as i'm really sold on the NF904 cam.
Last edited by mopar dave; 06/04/20 02:16 PM.
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Re: new SFT for the 511
[Re: mopar dave]
#2781395
06/04/20 01:58 PM
06/04/20 01:58 PM
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Joined: Jan 2003
Posts: 11,718 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,718
Portage,michigan
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Like the first one way better
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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Re: new SFT for the 511
[Re: mopar dave]
#2781422
06/04/20 03:52 PM
06/04/20 03:52 PM
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Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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First is too small, second too big.......My [censored] box street car 470 runs a .680-.660 276-281 and is tame and street able as a kitten.......
Last edited by Thumperdart; 06/04/20 03:53 PM.
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: new SFT for the 511
[Re: Thumperdart]
#2781425
06/04/20 04:06 PM
06/04/20 04:06 PM
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Joined: Jan 2007
Posts: 8,042 Mt Morris Michigan
mopar dave
OP
master
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OP
master
Joined: Jan 2007
Posts: 8,042
Mt Morris Michigan
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I know at first glance the 267@50 looks small, but the at 50 is not the end of the story. You need to look at the @200 number. Tells what the cam is really doing. Tim said this one is as good or better than some roller cams and I’m using a 1.6 rocker on that too. I think I was over crammed at 270 with the lower compression, so want to be careful here. A genius cam designer once said its not the duration, but where it’s at that really matters. This 267 is 5* more at .200 than my previous 270 cam.
Last edited by mopar dave; 06/04/20 04:06 PM.
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Re: new SFT for the 511
[Re: mopar dave]
#2781457
06/04/20 05:41 PM
06/04/20 05:41 PM
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Joined: Mar 2009
Posts: 2,464 Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,464
Sydney,Australia
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you know its going to come down to testing and how your combination likes whichever cam . I am at 272/272@0505 , .600 nett , 108 lobe separation . I am a hair off where I thought I should be for my sixty , transbrake . But at around 400lbs heavier and 30"radial I feel mine is running fine . You may even just need a bigger stall converter , mine is 6000 . It was speced as a 5700 by A1 when I had stock port heads and stalled right around that . TF270 heads , more power slightly bigger stall .
Tex
New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive
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Re: new SFT for the 511
[Re: mopar dave]
#2781481
06/04/20 07:01 PM
06/04/20 07:01 PM
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Joined: Jan 2003
Posts: 11,718 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,718
Portage,michigan
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If anyone wants to learn some interesting cam info, go over on speed talk and search UD Harold and read his post. You’ll find that picking a cam just by the @50 is not the way. You need to find the @200 as well and compare. I learned a bunch over there and still don’t know everything. Safest way to be right on your cam is to call Dwayne with your combo and have him spec one. Without trying to brag, my stuff has always ran how i expected it to right out of the gate, and not been underachieving, i don't think. . Dwayne has done/ specced all my cams. He is very smart. Really trust his judgement, and takes out the guesswork. Cams are kinda mysterious. Its good having somebody that has it figured out I remember yanking out a cam of his years ago, and replacing it with a cam a certain cam guru swore would pick up the combo. Slowed it down almost a tenth and a half.....learned then about avoiding a wide lsa cam in an NA deal with somewhat limited heads.. that was on a 112.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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Re: new SFT for the 511
[Re: mopar dave]
#2781487
06/04/20 07:22 PM
06/04/20 07:22 PM
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Joined: Oct 2003
Posts: 11,684 W. Kentucky
justinp61
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I Live Here
Joined: Oct 2003
Posts: 11,684
W. Kentucky
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1.6 / 1.5 combo. .016 lash puts intake at .633 actual and I think the exhaust was .615 Is there a reason you're not running more lift? My Indy headed small block is running .710/.719" at the retainers, 263/271 @ .050. I don't have the .200 numbers.
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Re: new SFT for the 511
[Re: mopar dave]
#2781493
06/04/20 07:33 PM
06/04/20 07:33 PM
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Joined: Aug 2011
Posts: 2,864 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,864
Pattison Texas
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Yeah I had one of those Scott Brown cams too. It was a turd. Worst cam I ever had and I used to see a bunch of those for sale second hand. I currently have Dwaynes grind and it’s not a bad cam, but I think a little more aggressive and on a 108 is the answer. Mines on a 110. Hey Dave, what mufflers & type of exhaust are you running ? & have you uncapped it
Last edited by csk; 06/04/20 07:33 PM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: new SFT for the 511
[Re: mopar dave]
#2781504
06/04/20 07:59 PM
06/04/20 07:59 PM
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Joined: Jan 2003
Posts: 11,718 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,718
Portage,michigan
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Yeah I had one of those Scott Brown cams too. It was a turd. Worst cam I ever had and I used to see a bunch of those for sale second hand. I currently have Dwaynes grind and it’s not a bad cam, but I think a little more aggressive and on a 108 is the answer. Mines on a 110. Lol... You knew who i was talking about. Too funny
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
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Re: new SFT for the 511
[Re: B3422W5]
#2781509
06/04/20 08:20 PM
06/04/20 08:20 PM
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Joined: Jan 2007
Posts: 8,042 Mt Morris Michigan
mopar dave
OP
master
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OP
master
Joined: Jan 2007
Posts: 8,042
Mt Morris Michigan
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Haha, yeah the 112 lobe sep being faster in a pump gas n/a deal was a joke. He should of put all his cams on a 110, would of been way more successful.
Last edited by mopar dave; 06/04/20 08:21 PM.
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