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which holley for 383

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moparjohnny

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some say that a 750 is to much for a street performance 383,some people think 600 is good for street 383 with a little warmer cam and headers and aluminum intake what do you think. they did run pretty good from factory with 600 as i recall. thanks
 
Ran a 750 DP on a mild 383 back in 70. The car had a factory stall from a 69 Super Bee and 3.91's from the same Bee. It also had 915 heads, headers and a very mild cam and ran well. Fuel mileage sucked but no one cared about that in 1970 lol. Just don't mess with any spread bore Holley vac secondary carbs unless it's a 3310. The 3310 series is a square bore and works well and is the only vac secondary carb from Holley that I feel is worth it's salt. Now if you know how to tune a carb, the TQ is also a very good one to use.
 
i would say a 750 is right on the money, heck im running a "tuned" Holley 750 DP on my 1976 ford F100 with a warmed up 302 that i bought just months ago of this forum!....the venturies for many Holley and Quick fuel carbs are the same for 650s and 750 carbs. its the jetting and internal calibrations that are different.
 
I just put a Holley 650 DP on my nearly stock '69 383 and it seems just right.
 
Ran a Holley 752 DP on my mild 383 I had back in the 90's and it worked great. That Dart ran 12.30's @ 110 with a very mild 383. Ron
 
I ran a Holley 750 vac sec (list 3310) on a warmed up 360 and it ran great. I would avoid a DP..
 
I'm currently running a period Holley (List No. 4366 I think - but is year correct for '70 440) - and it is only around 570cfm. No problems yet, and it seems to supply plenty of gas when required. Sometimes a bigger carb is just there to empty the tank faster....not necessarily make more power. :D Here's the proof it runs fine;



Here it is not long after installation, sitting on top of an Edelbrock 2191 manifold with 1-5/8" TTI headers on a 2-1/2" full exhaust - with X pipe.

 
I have a holley 670 street avenger on my 383 roadrunner, pretty much stock with a little bit more of a cam, DP4B intake and stock exhaust manifolds. I would put this carb right on the money for a perfect setup on the 383.
 
Loved the video! Sweet looking GTX and a great color....I am building a 468 stroker out of my 383 with al heads and a Vodoo cam. I am thinking a 750 would be a little light for those cubes but will defer to whatever the experts think. Would appreciate the recommendations and past experiences that the fellow members would have on that combo for size and type of carb. Thanks!
 
Mocajava said:
Loved the video! Sweet looking GTX and a great color....I am building a 468 stroker out of my 383 with al heads and a Vodoo cam. I am thinking a 750 would be a little light for those cubes but will defer to whatever the experts think. Would appreciate the recommendations and past experiences that the fellow members would have on that combo for size and type of carb. Thanks!
Click to expand...

I think a 750 could work well, and this probably depends on gears and other factors. I ran an QF-SS-830 mechanical secondary and also a QF-Q-850-AN on a 450 ci (stroked 383). For me, the SS-830 was easiest to start because of choke. It responded well on throttle but had a small lean spike when stepping on the gas that I was unable to cover up with the pumpshot. Q-850-AN has no choke tower so harder to start, is also very responsive, and I have been able to eliminate the lean spot when I step on the gas. Goes from cruise A/F of 14.6-15.0 straight to 12.3 and then rises to 13.2. The Q-850 has smaller venturies (1.4) than the SS830 (1.45 primary and 1.56 secondary). The 850 is running better, but the car is set up slightly differently, and I think I might be able to get the 830 to run just as well. I ran a larger (1.56" venture, AN booster) main body. It had a big lean spot that I fought to get rid of and was clearly less responsive when just on throttle. I'm running manual transmission and 4.30 gears. Don't have a track or dyno comparison between the two, but have driven both a lot.
 
Holley 3310 on my built 383. gas gauge moves like the minute hand on a clock when you got your foot in it.
 
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