Posted By: ngpSatellite
avs 650 or 800 carb for a stock 383HP????????? - 05/31/10 07:48 PM
which would you recommend??? price does not matter.its a pure stock 383HP 1969 RR eng
avs 650 or 800 carb for a stock 383HP?????????
Posted By: HYPER8oSoNic
Re: avs 650 or 800 carb for a stock 383HP????????? - 05/31/10 07:56 PM
Quote:
which would you recommend??? price does not matter.its a pure stock 383HP 1969 RR eng
650 for good street/mileage manners, 800 for more performance with minor mods (cam,intake,exhaust).
Save compression for a toss-up choice (mileage vs.
power), depending on the pump gas.
Posted By: ngpSatellite
Re: avs 650 or 800 carb for a stock 383HP????????? - 05/31/10 08:01 PM
Quote:ahhhhh... hey thanks for the advice... just want a cruzer with little punch... leaning towards a 650..Quote:
which would you recommend??? price does not matter.its a pure stock 383HP 1969 RR eng
650 for good street/mileage manners, 800 for more performance with minor mods (cam,intake,exhaust).
Save compression for a toss-up choice (mileage vs.
power), depending on the pump gas.
Posted By: JohnRR
Re: avs 650 or 800 carb for a stock 383HP????????? - 05/31/10 08:06 PM
650 is how it was equipped originally , if it's stock stay with the 650
Posted By: ngpSatellite
Re: avs 650 or 800 carb for a stock 383HP????????? - 05/31/10 08:12 PM
Quote:thats what I was thinking ... stock exhaust... the whole bit.. org pistons and cam... std bore the only diff is a eddy performer which is not a big upgrade??
650 is how it was equipped originally , if it's stock stay with the 650
Posted By: HYPER8oSoNic
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 01:50 AM
Quote:Quote:thats what I was thinking ... stock exhaust... the whole bit.. org pistons and cam... std bore the only diff is a eddy performer which is not a big upgrade??
650 is how it was equipped originally , if it's stock stay with the 650
Not too big of an upgrade, Saves you a few pounds
over the iron manifold. I believe the 69' RR
came through with 650 Carter AVS's, sort of like
the AFB, but the primary barrels are SLIGHTLY smaller than the secondary barrels. Not to be confused with the Carter Thermoquad!! All in all,
an easy carb to tune and maintain. A good rebuild/
jetting adjustment (for todays crappy gas) and some ignition timing changes, you're off and runnin'!!!
Posted By: RUNCHARGER
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 01:55 AM
650
Sheldon
Sheldon
Posted By: DaytonaTurbo
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 02:10 AM
650 if the motor's bone stock.
Posted By: NachoRT74
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 04:28 AM
come ooon... stock 400s came with 850 cfms! ( so do same years 440s ) and 340s since 71/72 came with 800 cfms! carbs ( TQ )
Posted By: joedust451
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 04:53 AM
Quote:
come ooon... stock 400s came with 850 cfms! ( so do same years 440s ) and 340s since 71/72 came with 800 cfms! carbs ( TQ )
Squarebores & spreadbores react totally different from one another, so they can't be compaired as equals when your talking CFM, its apples too oranges, you can always get away with a larger CFM carb on a given app. if useing a spreadbore over a squarebore, i'm just talking vacuum controlled units, not DPers.
Posted By: HYPER8oSoNic
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 07:11 AM
Quote:Quote:
come ooon... stock 400s came with 850 cfms! ( so do same years 440s ) and 340s since 71/72 came with 800 cfms! carbs ( TQ )
Squarebores & spreadbores react totally different from one another, so they can't be compaired as equals when your talking CFM, its apples too oranges, you can always get away with a larger CFM carb on a given app. if useing a spreadbore over a squarebore, i'm just talking vacuum controlled units, not DPers.
100%, 
Posted By: dustergirl340
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 12:42 PM
People tend to overcarb. My 340 ET's best with a 650 Holley.
Posted By: NachoRT74
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 04:13 PM
I can say you can make a big mistake between a secondary vacuums or double pumper on an engine, but I don't think really between spreadbore or squarebore, or sequential over simultaneous... differences ? yes, they get diff responses ones over the others, then the quality of the piece and you must match the response you want with cam and timming, but not that big I think to "overcarb" just with CFM spec... I'm just being logical, not talking about the experience of course.
we got also 6packs on 340s ( 1000 cfms ), true just the center is the pumper
we got also 6packs on 340s ( 1000 cfms ), true just the center is the pumper
Posted By: joedust451
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 05:57 PM
Quote:
People tend to overcarb. My 340 ET's best with a 650 Holley.
, so does mine, & it also runs cleaner & doesn't foul plugs, even if i jet it up.
Posted By: DJVCuda
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 06:05 PM
650
ET wise I'd be willing to bet you could get more out of the 800 - but thats not your goal so 650 is your best bet!
ET wise I'd be willing to bet you could get more out of the 800 - but thats not your goal so 650 is your best bet!
Posted By: Slipknot440
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/01/10 08:02 PM
if it helps any my hemi dynoed at 502 hp with a 750 dp on it and at 494 hp with an eddy 800 on it
Posted By: Rug_Trucker
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/03/10 03:21 AM
Keep in mind boys and girls that the Thermoquads, Quadrajet, and AVS adjust their CFM's according to engine demand. That is why you can run those big carbs on little engines. Holleys don't do that. 
Posted By: HYPER8oSoNic
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/03/10 03:34 AM
Quote:
650
ET wise I'd be willing to bet you could get more out of the 800 - but thats not your goal so 650 is your best bet!
True. BUT, you would have to improve the breathing
habits of the motor (headwork, headers, cam and intake).
Posted By: HYPER8oSoNic
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/03/10 03:42 AM
Quote:
Keep in mind boys and girls that the Thermoquads, Quadrajet, and AVS adjust their CFM's according to engine demand. That is why you can run those big carbs on little engines. Holleys don't do that.
Six packs are an example too.Carters are more forgiving then mechanical
secondary Holleys. Although, the kick off the
line will be stronger with the DP. Vac sec Holleys
run strong too, if set right. AVS carbs are almost
foolproof.
Posted By: HYPER8oSoNic
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/03/10 03:44 AM
Quote:
if it helps any my hemi dynoed at 502 hp with a 750 dp on it and at 494 hp with an eddy 800 on it
What was the torque peaks on the motor?
Posted By: JohnRR
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/03/10 12:20 PM
Quote:
if it helps any my hemi dynoed at 502 hp with a 750 dp on it and at 494 hp with an eddy 800 on it
Posted By: Slipknot440
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/03/10 06:58 PM
506 with a holley. 501 with the eddy
Posted By: Paul_Fancsali
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/03/10 07:05 PM
I like a 800 on the 383 will get you at least.15 in qtr unless the sec are coming in too fast.I assume the 800 is avs version not the afb which if it is oh well!!!
Posted By: SomeCarGuy
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/03/10 08:52 PM
Quote:
506 with a holley. 501 with the eddy
Was the Holley dialed in better? The air door alone takes some time with the AVS to get just right. Not counting jetting/rods.
Posted By: Slipknot440
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/04/10 12:59 AM
the holley was my engine guys dyno carb. For anything under 500 cubes (as far as i can tell). But it was set up a lot better than my eddy, but that eddy only gave me problems
Posted By: SomeCarGuy
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/04/10 01:41 AM
Really? What was wrong with the 800 AVS? I haven;t seen anybody saying that they had trouble with the AVS carbs.
Posted By: HYPER8oSoNic
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/04/10 02:20 AM
Quote:
Really? What was wrong with the 800 AVS? I haven;t seen anybody saying that they had trouble with the AVS carbs.
They are very forgiving carbs. Air doorvs. Vac sec/mech sec, Air doors are nearly foolproof and less chance of vacuum leaks!!!
Posted By: ngpSatellite
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/04/10 02:39 AM
bought the 650 AVS eddy and it has much better performance then the 750 eddy AFB it replaced!! hands down Very nice low end pick up!!! seems perfect for the 383HP bone stock engine. 
...thanks for all the advice!
Very nice low end pick up!!! seems perfect for the 383HP bone stock engine. ...thanks for all the advice!
Posted By: HYPER8oSoNic
Re: avs 650 or 800 carb for a stock 383HP????????? - 06/04/10 02:56 AM
Quote:
506 with a holley. 501 with the eddy
Very close, the DP forces the HEMI to rpm quicker!!