Re: 511 project hp falls short of target
[Re: mopar dave]
#2395105
10/29/17 11:13 PM
10/29/17 11:13 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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You are gonna have to take it to the track & tune 1st
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]
#2395153
10/30/17 01:01 AM
10/30/17 01:01 AM
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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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Read your post quickly and I'm just gonna rattle off what came to mind: 1. F**k those dyno software programs. I own four of them, ranging from cheapo to "Professional" level and NONE of them give results that match what I've found in the real world without my gaming the inputs significantly to tweak the results.
2. How much does your car weigh with driver?
3. Is it a stick car or an automatic? If auto, what type of converter?
4. How much gear do you run and with what size & type of tires?
5. What are you running for fuel? Have you tested different timing settings?
6. What's your performance goal? I don't mean "700 HP on pump gas", I mean an ET goal. If the car ran 9.99, would it be legal at the track vs. only going 10.00?
7. "Seat of the pants" testing on the street is next to worthless. Too many variables, too little traction, etc. I've done things in the past that I'd swear would show up as improvements on the track that didn't, but my "butt dyno" told me it would.
8. Until you either pull the engine and put it on a reputable engine dyno OR spend a solid day at track working on the tune, so that you can get some real-world #s, you have no idea beyond an educated guess what that engine's making.
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Re: 511 project hp falls short of target
[Re: mopar dave]
#2395154
10/30/17 01:03 AM
10/30/17 01:03 AM
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Joined: Mar 2009
Posts: 2,475 Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,475
Sydney,Australia
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The track always shows you what you have. I think it would be lucky to run a 10.50 the way it sits. what are you putting it in ? my 505 makes maybe 615 and has gone 10.53 @ around 3660lbs . I only have cnc 440 source heads and 4150 carb. until you run it you are only second guessing . 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: 511 project hp falls short of target
[Re: mopar dave]
#2395167
10/30/17 01:40 AM
10/30/17 01:40 AM
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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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With a few tweeks you didnt make your smallblock would have run 9's. Lots of very similar combos out there doing so
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]
#2395177
10/30/17 02:08 AM
10/30/17 02:08 AM
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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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If it would of stayed together it would been in the 9.90's im sure. Those indys were maxed out per Dwayne Welder and it was 13:1 compression and 80# lighter. I like the BB though. Ill get it figured out. Its all just time and money right now. I think most would love the way it runs, alot of fun to street drive. My goals are usually lofty thats all. Didnt you run 10.30's with it?
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]
#2395193
10/30/17 03:23 AM
10/30/17 03:23 AM
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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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Bigger heads, bigger carb. will make more power and go faster My old 518 C.I. 400 pump gas stroker(4.375x4.300 stroke) ran 10.30 with the ported Eddy RPM and the low deck six pack at 127.+ MPH a bunch of times. Swap heads to a set of Indy SR M.W. ports and a 400-3 intake with a single 1050 dominator and it ran low tens at 134.+ MPH, same cam, a little more compression, 84 CC heads to 76 CC heads, 10.29 to 1 to 10.76 to 1 comp ratio That car weighed 3450 Lbs. with me in it, it ran that through the 3.0 inch full exhaust system to the rear bumper and the air cleaners on both set ups
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]
#2395289
10/30/17 12:13 PM
10/30/17 12:13 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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Without dyno testing it, you'll never know what it really makes....... Period.
You want 700hp...... For sure? Put it on the dyno and start swapping parts til you get there. Then put it in the car and see what it runs.
The time slip is a report card on how well the entire combination works..... Not just how good the motor is, or how much power it makes.
I've seen first hand both ends of the spectrum on that. Cars that actually exceed the performance of the calculators, and cars that don't even come close.
I just had a motor on the dyno about a month ago..... Made 443hp. Two weeks ago it was in the car at the track for a test n tune. Went 11.34@117, at 3600lbs. Shows 445 on the Moroso chart.
I know if I had that pile of parts for your 511 on the dyno, I'd be expecting more than 650hp.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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