1970 383 road runner 4 speed - what carb?
#1968575
12/12/15 08:54 PM
12/12/15 08:54 PM
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Posts: 457 Hightstown, NJ
njdevil2
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OK, being I wanted to redo this right the first time, I purchased a used Street Avenger 660 and rebuilt it. Full throttle the thing is scary fast but part throttle and idle is horrible. It surges and misses like no ones business. I borrowed a Holley 750DP from a friend and the car runs better. So, I have to buy another carb, preferably a Holley, cuz that's what's was on it new(in 1970). It is: 383 - 4 speed, 9.5:1 compression, PS, shorty headers, 2.5" Pypes exhaust with X pipe and a 2" spacer(which I used cuz the carb and fuel lines would not fit it).
I don't care about stock, or fuel mileage, something that will not be over carbed and make nice HP. I'd like to keep it around $400 if possible. I haven't looked just yet, I'm just happy the thing runs better now, but the 750 will have to go back the owner sooner or later.....thoughts?
Last edited by njdevil2; 12/12/15 08:55 PM.
1970 road runner Convertible 1 of 179
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Re: 1970 383 road runner 4 speed - what carb?
[Re: njdevil2]
#1968664
12/12/15 11:40 PM
12/12/15 11:40 PM
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Posts: 36,040 Lincoln Nebraska
RapidRobert
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t but part throttle and idle is horrible. It surges and misses like no ones business. fuel-bump the pri jets up 4 sizes & (re) try it (2) ign-check rotor phasing
live every 24 hour block of time like it's your last day on earth
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Re: 1970 383 road runner 4 speed - what carb?
[Re: njdevil2]
#1968940
12/13/15 02:41 PM
12/13/15 02:41 PM
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njdevil2
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Tom----you have no idea how long a road this has been-----on thing after another...lol
Gus - I think Jegs shows a HR-750-VS, would that work?
Summit, Jegs and QF all show the same price, QF charges shipping, so its a toss up. $437 delivered....The 750 is cheaper, however....
1970 road runner Convertible 1 of 179
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Re: 1970 383 road runner 4 speed - what carb?
[Re: njdevil2]
#1969049
12/13/15 05:52 PM
12/13/15 05:52 PM
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madscientist
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Do a QF 750 DP. Why bother with a VS?
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: 1970 383 road runner 4 speed - what carb?
[Re: njdevil2]
#1969063
12/13/15 06:27 PM
12/13/15 06:27 PM
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Chris2581
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FWIW.... I ran a 750 Holley Dp on my 383 4-speed car with no problems. I did have a old(1972) Street Hemi cam in it
Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.
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Re: 1970 383 road runner 4 speed - what carb?
[Re: madscientist]
#1969178
12/13/15 10:53 PM
12/13/15 10:53 PM
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Joined: Dec 2004
Posts: 10,554 Rittman Ohio
fourgearsavoy
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Do a QF 750 DP. Why bother with a VS? Maybe because it's about $100 over what he want's to spend
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: 1970 383 road runner 4 speed - what carb?
[Re: njdevil2]
#1969189
12/13/15 11:03 PM
12/13/15 11:03 PM
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Joined: Dec 2004
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fourgearsavoy
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Tom----you have no idea how long a road this has been-----on thing after another...lol
Gus - I think Jegs shows a HR-750-VS, would that work?
Summit, Jegs and QF all show the same price, QF charges shipping, so its a toss up. $437 delivered....The 750 is cheaper, however.... The 750 has only the most basic features that's why it's so inexpensive. I prefer a metering block on the secondaries,and the 4-corner idle is a very nice feature. Is this the one http://www.quickfueltechnology.com/carbu...-750cfm-vs.htmlGus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: 1970 383 road runner 4 speed - what carb?
[Re: njdevil2]
#1969326
12/14/15 03:18 AM
12/14/15 03:18 AM
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njdevil2
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Yup, that's the one.
For the money, it looks like the QF carbs have adjustable secondarys, which the Holley does not. Also viewable float bowls. I had thought of a Demon carb, but for features, it looks like the Quick Fuel is better. I have some time to ponder this, my bonus from work will pay for at least $250 of the cost, I think, by months end. My daughter, who's in Florida just had her Reliant towed again. It just cost me $1700 the last time...so I'm looking forward to another bill..the tow alone was $200....so it looks like after the new year I can do something.
1970 road runner Convertible 1 of 179
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Re: 1970 383 road runner 4 speed - what carb?
[Re: njdevil2]
#1969865
12/15/15 12:46 AM
12/15/15 12:46 AM
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fourgearsavoy
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Kind of Ironic with a car called "Reliant" I have a Quickfuel 1050 carb on my car and it was almost perfect out of the box. I just jetted it up a bit and set the base idle mixture and it runs like a tornado, I give it half throttle and it seems too fast Then I mash it all the way and whoever is in the passenger seat is looking for something to hold onto Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: 1970 383 road runner 4 speed - what carb?
[Re: njdevil2]
#1969997
12/15/15 05:27 AM
12/15/15 05:27 AM
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njdevil2
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Yeah, unfortunately my daughter loves the Reliant and doesn't want to give up on it. I told her another $500 and that's it.
I may just bite the bullet and get the 780. Amazon.com has it for $416 and I already have Prime, so it's free ship....just have to make sure I'm not taxed or its back to Jegs...lol.
Last edited by njdevil2; 12/15/15 05:28 AM.
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