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Dissapointed with my run with 69 Roadrunner/440 6pk
#278766
04/05/09 09:58 PM
04/05/09 09:58 PM
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Joined: Oct 2008
Posts: 261
Wisconsin
BLONDE BARRACUDA
OP
enthusiast
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OP
enthusiast
Joined: Oct 2008
Posts: 261
Wisconsin
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Went to drag strip Saturday. Made 3 passes with the best of 14.2 at 95mph with a 1969 Roadrunner 440 6pk with 4speed. Mainly stock with a little better cam, 391 gears. Tires were spinning in 1st only with a best of 1.90 60ft. Was hoping for mid to upper 13's. I think that maybe the factory fuel system was a little restrictive. Seemed sluggish after the first 1/8th mile. Is this ET sound about right with this combo or is it slow ???? It is just a street car/daily driver but kind of expected it to ET better...thanks for any and all replies
Last edited by BLONDE BARRACUDA; 04/05/09 10:38 PM.
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Re: Dissapointing Run w/440 6pk
[Re: B1Fish540]
#278774
04/05/09 11:05 PM
04/05/09 11:05 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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Rock Springs
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Some thing isnt right, have you checked basics, like timing? If the stock fuel system is in good working order, its not your problem period. A stock Road runner with a stock 383, with factory intake, carb, full interior, stock converter 3.55 gears. And a good tune, would run 100 mph in the 1/4. Spare tire in the trunk and all. 
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Post deleted by Defbob
[Re: BLONDE BARRACUDA]
#278776
04/06/09 12:32 AM
04/06/09 12:32 AM
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Anonymous
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Anonymous
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Re: Dissapointing Run w/440 6pk
#278777
04/06/09 12:46 AM
04/06/09 12:46 AM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
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Joined: Jan 2003
Posts: 6,266
Renton Washington
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Quote:
Quote:
timing is at 36 degrees I still believe my in line filter is the problem. I do not believe at all that a stock 383 with 354 gears will run 100mph in 1/4. I appreciate your reply 
Quote:
ROAD AND TRACK: The standard engine was a 383 CID Roadrunner V8 rated at 335 bhp and 425 lb·ft of torque. For an extra $714, Plymouth would install a 426 CID Hemi rated at 425 bhp and 490 lb·ft of torque. Combined with low weight, the 6-passenger Road Runner could run the 1/4 mile in 13.4 seconds at 105 mph. It would prove to be one of the best engines of the muscle car era, and the Road Runner one of the best platforms to utilize it. Plymouth expected to sell about 2,000 units in 1968; actual sales numbered around 45,000. (It should also be noted Dodge debuted the Road Runner's cousin, the Super Bee, that same year
Read the quote again Freddy, that time is for the Hemi equipped Roadrunner.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: Dissapointing Run w/440 6pk
#278778
04/06/09 12:50 AM
04/06/09 12:50 AM
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Joined: Aug 2007
Posts: 1,271
Vista, California
67Satty
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Posts: 1,271
Vista, California
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I think the goal for the 383 back then was a 14 flat at 100 mph quarter. Even those I'm guessing were ringers. I'm thinking the 13.4 at 105 must've been the Hemi. Average, garden-variety, bone-stock, non-ringer not tuned-for the-magazines 383 Roadrunner? I'm guessing most of those would run a low 15?
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Re: Dissapointing Run w/440 6pk
[Re: Triple Threat]
#278780
04/06/09 01:05 AM
04/06/09 01:05 AM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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Rock Springs
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Non Believers LOL Not only did they do it, they did it bragging, and as a advertisement Logo. "In 1968 with the intro of the Plymouth Road runner, Mopars claim to fame was Speed on a budget, designed to run 100 mph in the 1/4 mile and sell for under $3000". You probably wouldn't believe this same car with a little work, still carrying stock 906 heads, and Factory fuel system wouldn't run no where near 11.20's in the 1/4 either... Rapid Transit's Believe it or not 
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Dissapointing Run w/440 6pk
[Re: BLONDE BARRACUDA]
#278781
04/06/09 01:17 AM
04/06/09 01:17 AM
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Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
dave571
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Joined: Dec 2003
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Carstairs, Alberta, Canada
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Quote:
... I do not believe at all that a stock 383 with 354 gears will run 100mph in 1/4. I appreciate your reply
Stock 383's were 15 second cars most days. Well set up with some slicks and gears, and they improved some.
In any case I think you should put a fuel pressure gauge on the six pack car and run it. Also maybe a vacuum gauge. The vacuum gauge may show a valve spring issue, etc.
The times do clearly show that the motor has torque, but not hp. 
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Re: Dissapointing Run w/440 6pk
[Re: dave571]
#278782
04/06/09 08:08 AM
04/06/09 08:08 AM
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Joined: Jan 2003
Posts: 10,008
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
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Posts: 10,008
Frostbitefalls MN (Rocky&Bullw...
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A lot of the performance had to do with track conditions, like altitude and barometric pressure. Take a stock 383 RR and run it in Minnesota in the heat of the summer, and you are looking at 94 to 96 mph at best. DA would be somewhere around 4500 ft! Take the same car and run it on the east coast or down south in the fall, with a DA of 0 or mineshaft conditions, and guess what? It would pick up tremendously. I had a bone stock 69 440 RT charger, best was 14.92 at 96 mph. More than likely due to a DA north of 3000 ft. The Magazine cars got special treatments like the 440 exhaust (2 1/2 Vs 2 1/4) a re curved distributor, re jetted, so I know for sure there were ringers out there as well. All in all, they carried thier own wieght with the performance crowd very well. Simple little things like removing the spare, airing up the tires, a tweak of the left front torsion bar, a cold thermostat, proper cooldown and you could run another 1/2 tenths quicker than the average Joe out there as well.
What RPM did you shift at? Was the car cooled down well?
Last edited by gregsdart; 04/06/09 08:09 AM.
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Re: Dissapointing Run w/440 6pk
[Re: dave571]
#278783
04/06/09 09:39 AM
04/06/09 09:39 AM
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Joined: Jan 2003
Posts: 75,020
U.S.S.A.
JohnRR
I Win
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Posts: 75,020
U.S.S.A.
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Quote:
Quote:
... I do not believe at all that a stock 383 with 354 gears will run 100mph in 1/4. I appreciate your reply
Stock 383's were 15 second cars most days. Well set up with some slicks and gears, and they improved some.
maybe with your grandma driving ...  ..
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Re: Dissapointed with my run with 69 Roadrunner/440 6pk
[Re: BLONDE BARRACUDA]
#278785
04/06/09 10:56 AM
04/06/09 10:56 AM
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Joined: Nov 2003
Posts: 5,048
Atlanta Indiana
Dave Watt
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Atlanta Indiana
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If you have original six pack carbs, the kill bleed holes on the outboard carbs could be oversized. We have seen many that were drilled too big and never let the ouboards pull open. Mine were like that and it would only run low 14's, once it was fixed, it would run 13.30's, bone stock with the skinny factory redline tires, 4:10's and a 4-speed.
Last edited by Dave Watt; 04/06/09 11:24 AM.
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