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Re: Dissapointing Run w/440 6pk
[Re: Bob_Coomer]
#278787
04/06/09 11:00 AM
04/06/09 11:00 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
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 
a 383 RR w/ 3.55's on bias tires, even tuned to the nines, with a pro driver wouldn't do 14.0's...maybe 14.40@95 maybe.
and it will need a TON of work, meaning stroker, roller cam $$$$$ in head works to run in the 11's. If not I want to hear the combo so I can build one.
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Re: Dissapointing Run w/440 6pk
[Re: Mr.Yuck]
#278789
04/06/09 11:29 AM
04/06/09 11:29 AM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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What are the other time increments and speeds? It seems slow. How much is the driver tho? When does the acceleration peter out? What rpm are you launching and shifting at? What is the timing curve? To me, 38° may be a little too much timing. What springs are in the outboard carbs?
I know modern performance rebuilt, stock-part 383s that with decent tires and 3.23s will pull 100mph in the 1/4. Factory original or not, they can do it with the stock cam and a good tuner.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Dissapointing Run w/440 6pk
[Re: moper]
#278790
04/06/09 12:14 PM
04/06/09 12:14 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
What are the other time increments and speeds? It seems slow. How much is the driver tho? When does the acceleration peter out? What rpm are you launching and shifting at? What is the timing curve? To me, 38° may be a little too much timing. What springs are in the outboard carbs?
I know modern performance rebuilt, stock-part 383s that with decent tires and 3.23s will pull 100mph in the 1/4. Factory original or not, they can do it with the stock cam and a good tuner.
depending on gas 38* would be my start but 36* is good too. Yeah I failed to add what is your rpm launch, of course it's probably a little low because of your tires...You might want to roll out then hit it.
Best I could do with a 383 in a 69 Charger w/ 3.23's on radials was 14.10@101 but that was a very stout 509 cammed 383. 3.91's and slicks knocked me down to 13.28 same engine in a 68 dart and 4.56's went 12.18 w/ a terrrrible trans, but that's OT.
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Re: Dissapointing Run w/440 6pk
[Re: Mr.Yuck]
#278791
04/06/09 12:15 PM
04/06/09 12:15 PM
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Joined: Oct 2003
Posts: 2,403
WASHINGTON, PA
11secaarcuda
top fuel
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top fuel
Joined: Oct 2003
Posts: 2,403
WASHINGTON, PA
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Did you check the throttle linkage?
67 Dart GT 340 4 speed
70 AAR Cuda 408 6 barrel
96 Indy Ram original owner
2011 Hemi Durango
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Re: Dissapointing Run w/440 6pk
[Re: 11secaarcuda]
#278792
04/06/09 12:28 PM
04/06/09 12:28 PM
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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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Without know other factors its hard to say where the problem truly is... but you said you have a restricted fuel system... thats gonna hurt, specially on a 6 pac and 5/16 line, all HP engines from the factory had 3/8 fuel lines and pick ups. It suprizes me that you had the best ET when you ran the 2.19 60' 
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Re: Dissapointing Run w/440 6pk
[Re: Kevins493]
#278795
04/06/09 01:15 PM
04/06/09 01:15 PM
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Joined: Jan 2003
Posts: 74,979
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,979
U.S.S.A.
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Quote:
Theres a guy on here with a factory stock class (BONE stock) 383 superbee that runs 13.5's. Maybe he'll post on this thread. Its amazing whats possible when you're really good at tuning....
Yes , he does have more gear either 3.91's or 4.10's and the car is over 3800 lbs .
My dart at 3600 with driver has gone 14.teens at 99.5mph with a timing chain that was so stretched and the plastic broken off the stock cam gear that I could have pulled it off without removing the gears .
The RR that this thread is about has a huge issue , and it could be the outboards not opening , that car should be in the low 13's .
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Re: Dissapointing Run w/440 6pk
[Re: Kevins493]
#278796
04/06/09 01:34 PM
04/06/09 01:34 PM
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Joined: Jan 2007
Posts: 160
Florida
hemisurfer
member
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member
Joined: Jan 2007
Posts: 160
Florida
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That would be my brother Florida_70Bee.
Ran a best of 13.47 the last time we were at Gainesville with a 1970 Super Bee 383 automatic.You would need to ask him about the combo.
I have a 69 RR 6 pack stroker 4 speed dana 410 same issues and almost identical times first time out, look at:
Fuel delivery
Headers
the heads themselves
stroker might be a bit different since it needs more air but the combo is close. The MPH should be over 100 minimum IMO for a six pack car.
Last edited by hemisurfer; 04/06/09 01:38 PM.
Chris
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Re: Dissapointing Run w/440 6pk
[Re: moparniac]
#278799
04/06/09 02:15 PM
04/06/09 02:15 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
clamp the springs.....
the rear pass side spring? I tired that once in a 67 coronet and I din't see any improvement. what's the trick? The car was doing 1.68 60 foot.
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Re: Dissapointing Run w/440 6pk
[Re: Mr.Yuck]
#278800
04/06/09 03:27 PM
04/06/09 03:27 PM
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Joined: Feb 2006
Posts: 2,379
MD
Kevins493
top fuel
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top fuel
Joined: Feb 2006
Posts: 2,379
MD
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Quote:
Quote:
clamp the springs.....
the rear pass side spring? I tired that once in a 67 coronet and I din't see any improvement. what's the trick? The car was doing 1.68 60 foot.
Doesnt make it 60' faster unless its spinning. Keeps it from going into wheelhop and it recovers quicker too...
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Re: Dissapointed with my run with 69 Roadrunner/440 6pk
[Re: carolinacuda]
#278802
04/06/09 05:56 PM
04/06/09 05:56 PM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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Just for reference: My full weight 67 Satellite with a low compression (2-bbl) 125,000 mile stock bottom end 383 and stock small valve 516 heads has gone 14.00 @ 98.68 MPH. It 60's @ 2.09. It's had the standard street hot rod treatment of headers, intake, Holley 4-bbl, 280*-ish cam, and a set of 3.91's.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: Dissapointed with my run with 69 Roadrunner/440 6pk
[Re: BLONDE BARRACUDA]
#278804
04/06/09 06:53 PM
04/06/09 06:53 PM
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Joined: Apr 2008
Posts: 1,285
Pacific NW USA
CompSyn
pro stock
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pro stock
Joined: Apr 2008
Posts: 1,285
Pacific NW USA
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 Mr. 6Pack Racing Engines - LinkBob Karakashian… ‘Mr Six Pack’ Article by Terry Cooper YouTube: Mr. 6Pack 8.09 @ 87.35 1/8th mile trackWith your six pack set up I highly recommend giving Bob Karakashian a call. Bob runs his A12 69 ½ Super Bee in the Pure Stock Muscle Car Drags and turns 12.09 seconds in the quarter @ 114 mph. He does it with the required factory HP exhaust manifolds, stock un-ported 906 heads, a full exhaust system, Carter mechanical fuel pump, and skinny G70-15 redline tires. Even more impressive, Bob’s cam in a 69 ½ Road Runner broke into the high 11s. Now that’s good tuning! Anyway, Bob is a nice guy and is glad to help. Check out this moparts.com thread HERECompSyn
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Re: Dissapointed with my run with 69 Roadrunner/440 6pk
[Re: BLONDE BARRACUDA]
#278805
04/06/09 08:01 PM
04/06/09 08:01 PM
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Joined: Feb 2005
Posts: 4,311
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,311
Prospect, PA
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You're way down on power. From where you are now, it is not a fine tuning issue.
1. Make sure you've got fuel, put on a good pump and filter. 5/16" line is not the problem at 95 mph, unless it is damaged.
2. Make sure the outboards are opening and opening soon enough. The outboard throttle plates can stick. You should be able to pull the vacuum line off the center carb and suck on the line and the outboards open. Check kill bleeds, or other possible problems in the vacuum pods.
3. Check the cranking cylinder pressure to see what you have and possibly identify a motor problem.
4. If the mufflers are old, they can fail internally causing a pluggage and rob a bunch of power. I had one muffler fail on a 105 mph car and it lost 4 mph and 0.5 sec in et from one weekend to the next. Took me a few weeks to figure that one out. I can only image what two failed mufflers could do.
For the DA of at least a few Wisconson tracks on Saturday, a decent 440-6 4 speed should have gone at least 105 mph. Your missing 100 hp.
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