Re: car won't 60 foot video
[Re: birdtracker]
#2119469
07/27/16 11:18 PM
07/27/16 11:18 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
super stock
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super stock
Joined: Sep 2015
Posts: 1,096
Australia
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I have only ever run 727 boxes so not familiar with powerglides. What is the ratio of 1st gear in powerglide compared to 727 ???
1963 Plymouth Max Wedge 1971 Barracuda
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Re: car won't 60 foot video
[Re: birdtracker]
#2119543
07/28/16 12:50 AM
07/28/16 12:50 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Its not top secret. I have been out loading for Norwalk. The car is 2550 with me in it. I named it Anorexic. I thought the 4:10 should pull it with the 1.76 first gear.If you watch the first video once it gets to the 1/8 and gets in high gear it flys. I have tryed 2 brand new convertors. One was 5,000 the other 5,800. The 5,800 is whats in it for this weekend. It has 6 passes on it.For this weekeng I am going to look at timing and carb. If I don't find anything then a gear change will happen. I will post some time slips from Norwalk. I am predicting 6.55 in the 1/8. It is very consistant. Birdtracker Have you confirmed these converters... have you run them up on the trans brake with no chip in it
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Re: car won't 60 foot video
[Re: birdtracker]
#2119561
07/28/16 01:11 AM
07/28/16 01:11 AM
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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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What's your valve lash set at?
5.53 @ 125 1/8th on the launch control..more left in her!
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Re: car won't 60 foot video
[Re: birdtracker]
#2119774
07/28/16 12:33 PM
07/28/16 12:33 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
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So. Burlington, Vt.
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Still no motor info.
For a comparison......a friends S/G Cuda from about 10-12 years ago. 2700lbs, 4.88's, 15x33's, glide, 1.76 low, 451 low deck, std port stage 6 heads, tg4500 intake, 1200 carb, 2 1/8 x 4 headers, UD 280/685 roller....... Motor dynoed 650hp. Went 9.30's at 143. My recollection is that the 60' times were in the high 1.20's.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: car won't 60 foot video
[Re: birdtracker]
#2119780
07/28/16 12:41 PM
07/28/16 12:41 PM
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Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
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I Live Here
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State of confusion
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valve lash is .022 cold. Both convertors flash what they should.I also had the trans out this spring and had it gone thru at a trans shop. New transmission lines and cooler. Birdtracker So I ASSume it around a .028 hot cam? I run mine at .014 cold and end up around .020........this is about WAY more than lash cos something is amiss here big time...........
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: car won't 60 foot video
[Re: B1MAXX]
#2119850
07/28/16 02:43 PM
07/28/16 02:43 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
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master
Joined: Nov 2004
Posts: 6,890
North Alabama
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Cam too much duration for cubes and not enough gear...a 470 cube big block with a 287 @ .050 cam, you better have good heads and spin it to 7500 plus.. I think the 119 was a typo.... Why? We used to run 452 inches with unported heads and the old .750 roller and didn't have to spin them 7500 to make power. But I doubt the motor is the issue with this car. If and I repeat IF the 119 is not a typo, at 2550 pounds, this thing makes 650ish on HP, which is not tough for an alum headed 470 if it has decent parts. That said, you should be able to kick it off the line and make it 60ft harder than it is, even with 4.10s and a 1.76 glide. I think the converter is way out in left field
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Re: car won't 60 foot video
[Re: Monte_Smith]
#2119869
07/28/16 03:12 PM
07/28/16 03:12 PM
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Joined: Jan 2004
Posts: 8,391 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,391
fredericksburg,va
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Cam too much duration for cubes and not enough gear...a 470 cube big block with a 287 @ .050 cam, you better have good heads and spin it to 7500 plus.. I think the 119 was a typo.... Why? We used to run 452 inches with unported heads and the old .750 roller and didn't have to spin them 7500 to make power. But I doubt the motor is the issue with this car. If and I repeat IF the 119 is not a typo, at 2550 pounds, this thing makes 650ish on HP, which is not tough for an alum headed 470 if it has decent parts. That said, you should be able to kick it off the line and make it 60ft harder than it is, even with 4.10s and a 1.76 glide. I think the converter is way out in left field I agree Monte, he's using converters for heavy cars (3000-3400 lbs) not the light car he has because it looks like it locking up right off the line. usally what works for a heavy car won't work for a lite car, especially a glide.
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Re: car won't 60 foot video
[Re: birdtracker]
#2119921
07/28/16 04:27 PM
07/28/16 04:27 PM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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Two brand new converters, one 5000 and the other 5800, has tried leaving at numerous different RPM's........ While it certainly could be a converter issue, it would seem as though this has been ruled out. I still say a footbrake launch might prove interesting...... Besides being easy and basically free.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: car won't 60 foot video
[Re: fast68plymouth]
#2119965
07/28/16 05:34 PM
07/28/16 05:34 PM
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Joined: Jan 2004
Posts: 8,391 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,391
fredericksburg,va
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Two brand new converters, one 5000 and the other 5800, has tried leaving at numerous different RPM's........ While it certainly could be a converter issue, it would seem as though this has been ruled out. I still say a footbrake launch might prove interesting...... Besides being easy and basically free. A tale of two cars, 68 dart 440-727-9" vert, 3200 lb loaded, car left good, wheels in the air ran 6.80 in the eight. 86 Daytona 2500 lb loaded same engine-trans combo out of Dart. Best was 6.55, left like a turtle. Had converter made (same flash) for car then ran 6.08 best.
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Re: car won't 60 foot video
[Re: birdtracker]
#2120032
07/28/16 06:43 PM
07/28/16 06:43 PM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
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I Live Here
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The op can confirm or deny this, but here's how I see it played out; Build car/motor, buy a new 5000 stall converter for the combination, go to the track, car won't leave. Calls a few people, a few people see the car run..... the consencus is the converter is wrong for the combo. Get new 5800 stall converter built, car runs the same.
Since he says the car pulls hard after shifting into high, my feeling is the trans is bound up in low gear.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: car won't 60 foot video
[Re: birdtracker]
#2120048
07/28/16 07:04 PM
07/28/16 07:04 PM
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Joined: Jan 2003
Posts: 14,515 So. Burlington, Vt.
fast68plymouth
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I Live Here
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How about a compression test just to see what kind of cranking pressure it has.
Is the assumption correct that both of these converters were built for this specific combination? If so, I don't see how they could get it so wrong....... Twice.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: car won't 60 foot video
[Re: birdtracker]
#2120416
07/29/16 09:38 AM
07/29/16 09:38 AM
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Joined: Jan 2003
Posts: 10,040 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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At 119 mph in the 1/8th, leaving like a pooch that tells me this car is making a lot of power, just not much till the Rs get up over 6500 with that cam? My guess is the REAL 1/8th mile per hour would be 121 if it got moving better early. That would be about a 5.75 in the 1/8th, or 9.0 in the 1/4. The 4.10 gear gives you a SLR of 7.40, and I would think it needs more like 9 or higher for decent results. However, it sounds like it is all three issues pointed out. Not enough gear, wrong converter, and a very big cam for that motor and trans combo. If it were my car, I would borrow a much shorter cam, somewhere around 280/288/110 like my Isky RR735, get a converter built to stall 6500, and put a 4.88 gear in it.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: car won't 60 foot video
[Re: birdtracker]
#2120572
07/29/16 01:08 PM
07/29/16 01:08 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
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So. Burlington, Vt.
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There is no motor into other than the cubes and the cam. It could be a 10.5:1 motor with unported 516 heads, or a 15:1 B1 motor. Without knowing what the build is, it's certainly possible the cam is too big, which is why I suggested a compression test. If it pumps 125-150, the cam is too big. If it's 190-220, it's not the problem.
Essentially no useful motor info has been provided, nor has it been confirmed whether or not the two new converters were actually built for this particular combo, or if they were simply "new".
IMO, not enough pertinent info has been provided about the overall combo to make a real recommendation.
In any case, he said he was going to Norwalk this weekend, so I'm sure he'll get plenty of suggestions there.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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