Re: 511 project hp falls short of target
[Re: mopar dave]
#2395446
10/30/17 03:55 PM
10/30/17 03:55 PM
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Joined: Aug 2003
Posts: 43,364 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,364
Bend,OR USA
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Dyno numbers can be influence with the same things as track performance such as weather, bad batch of pump fuel, bad timing lights and so on Torque converters, bad or half bad, can really influence the cars performance, fuel system, traction, drivers technique and the list goes on until you get all of them perfect from the front bumper bolts to the rear bumper bolts
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 511 project hp falls short of target
[Re: mopar dave]
#2395503
10/30/17 05:19 PM
10/30/17 05:19 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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here's the card. static 11.26:1 If I'm reading that cam card correctly: 302/308 at .020" 270/276 at .050" 110 LSA installed on (105?) .600+" lift Doesn't sound unreasonable for a 511 w/ that much compression that's expected to run on straight 93. What type of rings & gaps did you use? And what sort of block prep? If you go 12:1, you know your days of being able to run straight 93 w/o blending some good stuff when you really romp on it are most likely gone, right? That's especially so if you decide to tighten up the LSA that'll bump up even more cylinder pressure than the CR change alone. I'm still of the opinion that until you take it to the track (if an engine dyno session isn't in your future) and get a chance to actually tune it, you're still in the Twilight Zone as far as knowing what it can do. Regardless, good luck with it. I can only stand on the sidelines and see how this develops from here on out.
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Re: 511 project hp falls short of target
[Re: mopar dave]
#2395551
10/30/17 06:41 PM
10/30/17 06:41 PM
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Joined: May 2005
Posts: 1,030 ohio
67mprfan
super stock
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super stock
Joined: May 2005
Posts: 1,030
ohio
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I had a stock stroke 440 with about the same compression the best is in my signature so you should be close if not better. Like everyone else said take that car to the track and run it
Good luck with the tuning
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it. 67 Belvedere that worked it's way in the 10's
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Re: 511 project hp falls short of target
[Re: mopar dave]
#2395559
10/30/17 06:52 PM
10/30/17 06:52 PM
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Joined: May 2004
Posts: 12,422 Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,422
Taxes & Virus's R-US, NY
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I agree with all of that. Been there done that. If i think its same performance as my small block then its probably slower. The track always humbles me. 9.99 or quicker has been the goal. I figured 700hp would get me there. Race weight is 3380. On the dyno, where did you have your timing at? And refresh my memory, what compression and what cam? I can tell you, my 512's like timing on pump gas...AND, depending on whether its E10 or Ethanol free, my jetting can be as much as +4 jet sizes different. You have to tune for this, its not somthing you buy a carb and get it right out of the box..Same with timing, you have to try it to know.
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Re: 511 project hp falls short of target
[Re: dodger mope]
#2395703
10/30/17 10:10 PM
10/30/17 10:10 PM
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Joined: Aug 2011
Posts: 2,885 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,885
Pattison Texas
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i am curious about the springs on the card,120/360..is that the seat and open pressure. it seems low? I agree, my solid FT is much smaller & required 155/390
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: 511 project hp falls short of target
[Re: mopar dave]
#2395770
10/30/17 11:39 PM
10/30/17 11:39 PM
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Joined: Jan 2003
Posts: 11,732 Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,732
Portage,michigan
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At your weight 650 will easily get you in the 9's. Definately dont need anywhere near 700 My W5 car weighed almost exactly what yours does( 3350), ran 9.80's and made maybe 650 at the most. More like probably 640 The new owner" hopped it up" and made 700 with it, and ran 9.62@ 140 with it, good bit more more MPH than i ever ran. This was dynoed at Best Machine and made 708. Dyno and ET line up.
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, low 10.30’s 1/4 1.41 best 60 foot 6.56 at 104.17
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Re: 511 project hp falls short of target
[Re: mopar dave]
#2395849
10/31/17 02:15 AM
10/31/17 02:15 AM
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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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I'm not sure what I wrote there, but its not my spring pressure. The pressures are 145/410. Gonna run my current combo next season to get a baseline, then shave heads about .030". This will get about 11.9/12:1 compression with Doms cam which is a 274/280@50 on a 108 and .440/.427 lobes. That should push it to close to 700hp or over and into the 9.90's I would think. The 276-282 is after tightening up the recommended .028 lash to .020 hot and Isky and others say that brings the duration up in the process so that's why I've used those numbers...........I've been saying 276-281 forever so who knows........ This cam has gentle lobes and has been awesome for many years plus your cubes will eat a bit of duration as well so maybe BIGGER is even better..........
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: 511 project hp falls short of target
[Re: mopar dave]
#2395973
10/31/17 12:04 PM
10/31/17 12:04 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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From the sounds of it, and by the title of this post....... You've already made up your mind that combo isn't what you want. Might as well just start buying the new parts now........ You'll have all winter to change it over.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: 511 project hp falls short of target
[Re: fast68plymouth]
#2395994
10/31/17 12:41 PM
10/31/17 12:41 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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From the sounds of it, and by the title of this post....... You've already made up your mind that combo isn't what you want. Might as well just start buying the new parts now........ You'll have all winter to change it over.
Yep. No sense wasting time trying to find a hundred HP with tune up stuff. Jus buy what you want and get it back together and then on a dyno.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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