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OLD318
mopar addict


Reged: Feb 02 2004
Carb selection - upgrade stock 318 to 4 barrel-Options?
      #5531119 - Wed Oct 07 2009 05:19 PM

Hey guys, if you saw my other post I'm upgrading
my stock 318 to a 4 barrel MP aluminum intake.

What carbs do you guys put on this?

Holley 600 cfm or an Edelbrock AVS 500?
or..what do you guys use..

Its a stock 318 with single exhaust.
I will be upgrading to dual exhaust later on
but for now I just want to upgrade to a
small 4 barrel..

What do you guys use/recommend... thanks!


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RapidRobert
circle track


Reged: Nov 20 2003
Loc: Lincoln Nebraska
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: OLD318]
      #5531204 - Wed Oct 07 2009 05:47 PM

Quote:

my stock 318 What carbs do you guys put on this? What do you guys recommend... thanks!


Edelbrock.

--------------------
live every 24 hour block of time like it's your last day on earth


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Dougsmopars
top fuel


Reged: May 03 2005
Loc: dark side of the moon
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: RapidRobert]
      #5531226 - Wed Oct 07 2009 05:55 PM

edelbrock. I'd go 600 and jet it down if you need to. The Eddys aren't a rich carb. 600 should be fine right out of the box.

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Supercuda
I also have a small weasel!!


Reged: Sep 04 2007
Loc: West Texas
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Dougsmopars]
      #5531430 - Wed Oct 07 2009 07:13 PM

Where's the double pumper crowd???

Edelbrock 600


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Dougsmopars
top fuel


Reged: May 03 2005
Loc: dark side of the moon
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Supercuda]
      #5531548 - Wed Oct 07 2009 07:51 PM

Don't get them started

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DaytonaTurbo
I Could Care Less...But I'm Not Going To


Reged: Feb 26 2003
Loc: Manitoba, Canada
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Dougsmopars]
      #5531571 - Wed Oct 07 2009 07:59 PM

Quote:

Don't get them started




I've got a spreadbore holley 650 double pumper he could buy...

--------------------


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Dougsmopars
top fuel


Reged: May 03 2005
Loc: dark side of the moon
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: DaytonaTurbo]
      #5531730 - Wed Oct 07 2009 08:44 PM

I;'ve got a 780 DP i use for a door stop

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scratchnfotraction
gotta want it


Reged: May 29 2003
Loc: Florida
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Dougsmopars]
      #5532131 - Thu Oct 08 2009 06:06 AM

600 eddy would be good for a stockish 318

I also like a early to mid 70s chivy q-jet with the mopar throttle lever tac welded on to the throttle shaft for stock mopar 4-v linkage

that works great on a 318 also,IMO

any smaller holley would do..

remember 318 are easy to "over cam" which means they are easy to "over carb" also

I have ran a 750cfm on a stock teen..had good top end..but the idle was pig rich and slow speed drivabilty was sluggish till 3000 rpms or so

600 eddy out the box was almost right on the jetting but still a tad rich,IMO

good luck and dont over carb it with a stock cam

dont forget to get the throttle presssure rod adjusted correctly or you will be posting about new trannys for it

--------------------
L


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OLD318
mopar addict


Reged: Feb 02 2004
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: scratchnfotraction]
      #5533176 - Thu Oct 08 2009 04:28 PM

What about the Thunder AVS 500 cfm
Is that a better choice than a 600 CFM for
a 318.... anyone use the 500?


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Anonymous
Unregistered



Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: OLD318]
      #5533205 - Thu Oct 08 2009 04:49 PM

Holley 600...

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Theorio1025
member


Reged: Jul 20 2009
Loc: Staten Island, NY
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: ]
      #5533213 - Thu Oct 08 2009 04:57 PM

I had a holley 600 cfm vac. secondary on my camaro and I liked it. The car was run as a daily driver, even through the winter. Tried an Edelbrock 600 on the same car, and I don't think it ran as well.

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patrick
moparts member


Reged: Jan 20 2003
Loc: Grand Haven, MI
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Theorio1025]
      #5534135 - Fri Oct 09 2009 05:57 AM

eddie 600 is a good choice as it gives some room to grow. I have a 1406 on my magnum headed 318 with a 208@.050, .506" lift roller cam, RPM air gap and headers. I had to change the step up springs to the pink or natural, jet the primary down to .095" jets and .073/.052 rods and the secondary down to .089 jets. that was tuning with an LM1.

--------------------
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2006 Inferno Red Dodge Caravan SXT
2011 Toxic Orange Dodge Charger R/T


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OLD318
mopar addict


Reged: Feb 02 2004
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: patrick]
      #5534670 - Fri Oct 09 2009 11:16 AM

The one I was looking at is the Holley 80457S
model which is a universal 600 CFM 4 barrel
with electric choke and vacuum secondaries.
Brand new it runs around $275.00
which seems reasonable...
(The Thunder AVS 500 is around $350.00 )

Anybody use this one (holley)?

I have to use a 1" spacer to get this to fit.
on the MP Aluminum intake...

I've got the spacer and mopar "pieces" to connect
to the existing throttle linkage...

I understand I'll have to adjust the throttle
linkage to get this to work properly.

One more question I've got a 340 single 4 barrel
air cleaner... will this fit on the holley,
it looks like it will.... But I've never tried it

Anybody know?


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scratchnfotraction
gotta want it


Reged: May 29 2003
Loc: Florida
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: OLD318]
      #5534972 - Fri Oct 09 2009 01:37 PM

yes it will fit the holley gas hole

--------------------
L


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Procommuter
super street


Reged: Jun 14 2004
Loc: Hampden, Maine
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: scratchnfotraction]
      #5535149 - Fri Oct 09 2009 02:54 PM

Don't forget to use four barrell intake gaskets not the steel shim two barrell gaskets. AMHIK. One of the first things I learned on my first mopar.

--------------------
Wes
73 Barracuda 440 EFI 4 speed, 144.85 MPH LTA A/FSS Record Holder.


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gch
Polara Prince


Reged: Mar 06 2005
Loc: Central NC
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Procommuter]
      #5536916 - Sat Oct 10 2009 02:35 PM

The carb choice is your preference.I would run 600 cfm what ever you choose.It won't hurt you now and will support upgrades later.
Honestly I think dual exhaust will help more than a 4 barrell.Be prepeared to re-tune it after you swap exhaust.
At a minimum I would install a high flow muffler even with single exhaust.Stock (quiet) mufflers are very restrictive.

--------------------
You can't fix stupid
--------------------
70 Polara 4dr 496/727/3.73
98 Grand Cherokee 4.OH
75 Newport 440 on life support


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Supercuda
I also have a small weasel!!


Reged: Sep 04 2007
Loc: West Texas
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: gch]
      #5537403 - Sat Oct 10 2009 07:22 PM

Quote:


Stock (quiet) mufflers are very restrictive.




Quiet doesn't mean restrictive, nor does loud mean best flowing.

Car Craft, and others, have done a number of tests and the Dynomay Hemi muffler is the winner. Quiet, free flowing, cheap. On the dyno, with a sound meter, real tests not someone's guess.


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OLD318
mopar addict


Reged: Feb 02 2004
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Supercuda]
      #5546672 - Thu Oct 15 2009 09:31 AM

When you guys switch from 2bbl to 4bbl
do you retain the 5/16 stock fuel line
or do you also convert the fuel pump/ steel lines
to 3/8..

Is this part of the conversion for a stock
318 from 2bbl to 4bbl?

What do you guys do?


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Anonymous
Unregistered



Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: OLD318]
      #5546850 - Thu Oct 15 2009 10:51 AM

if you plan on keeping it under 300hp then the 5/16 fuel lines will be fine.

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gch
Polara Prince


Reged: Mar 06 2005
Loc: Central NC
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Supercuda]
      #5546896 - Thu Oct 15 2009 11:16 AM

Quote:

Quote:


Stock (quiet) mufflers are very restrictive.




Quiet doesn't mean restrictive, nor does loud mean best flowing.

Car Craft, and others, have done a number of tests and the Dynomay Hemi muffler is the winner. Quiet, free flowing, cheap. On the dyno, with a sound meter, real tests not someone's guess.


I agree with you but most stock mufflers I have seen are both quiet and restrictive compared to an aftermarket turbo style muffler(dynomax).
The 5/16 fuel line is sufficient.

--------------------
You can't fix stupid
--------------------
70 Polara 4dr 496/727/3.73
98 Grand Cherokee 4.OH
75 Newport 440 on life support


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scratchnfotraction
gotta want it


Reged: May 29 2003
Loc: Florida
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: gch]
      #5546995 - Thu Oct 15 2009 12:16 PM

5/16 line is all you need for the swap at this level of performance

you would be surprized just how much it will support before needing to go to 3/8 line,IMHO



--------------------
L


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Anonymous
Unregistered



Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: scratchnfotraction]
      #5547003 - Thu Oct 15 2009 12:18 PM

Quote:

5/16 line is all you need for the swap at this level of performance

you would be surprized just how much it will support before needing to go to 3/8 line,IMHO





bout 300hp. after that, good luck.


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scratchnfotraction
gotta want it


Reged: May 29 2003
Loc: Florida
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: ]
      #5547043 - Thu Oct 15 2009 12:35 PM

result do vary

and I was thinking about 350 hp myself

close enuff

and jumping from a stock 150 hp to 300hp is a big jump IMO,and the 5/16 line is doable

but a 4-v swap to a stock teen is not going to be that much HP to begain with..might bump it to 160 hp

headers have more of a boost than just swaping on a 4-v to a stock 318 in my book

--------------------
L

Edited by scratchnfotraction (Thu Oct 15 2009 12:38 PM)


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Anonymous
Unregistered



Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: scratchnfotraction]
      #5547060 - Thu Oct 15 2009 12:43 PM

5hp...w/ 4bbl carb/intake only...mabey... with a tail wind.

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gch
Polara Prince


Reged: Mar 06 2005
Loc: Central NC
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: ]
      #5547109 - Thu Oct 15 2009 01:12 PM

Dual exhaust is a must.Headers a plus.

--------------------
You can't fix stupid
--------------------
70 Polara 4dr 496/727/3.73
98 Grand Cherokee 4.OH
75 Newport 440 on life support


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Anonymous
Unregistered



Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: OLD318]
      #5607402 - Sun Nov 15 2009 06:42 PM

i would use a edelbrock 600

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69Dartman
Village Idiot


Reged: Jan 19 2003
Loc: Portland Oregon
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: ]
      #5619878 - Sun Nov 22 2009 01:24 AM

I run a 9800 series Thermoquad on mine with the 340 exhaust all the way back and the early manifolds. works great with 95 or 92 jets and I think the 340 metering rods.
If you know how to work on one they are pretty much fully tweakable to run on just about anything. Mine pulls smooth, starts cold and runs great first try, and gets good MPG and power. Plus they sound awesome at WOT

--------------------
Life's a little bit better when you hit a Camaro.


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Chris2342
super gas


Reged: Jan 19 2003
Loc: Jacksonville, FL
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: 69Dartman]
      #5619880 - Sun Nov 22 2009 01:47 AM

My first car was a 318 Duster.I used a 600 Holley (old 6909) a Holley street dominator intake, stock 340 cam from the Chrysler dealer,and 1 5/8th's cheapo headers with Walker street Hemi mufflers spec'd for a Hemi Road Runner I got from NAPA.That combo worked great in that Duster and with a shift kit in the 904 and 2.76's out back,it got over 20 mpg easily.

--------------------
Nautilus Racing
We use Superformance gaskets and Turbo Action converters/products.


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69superbee383
Changed


Reged: Nov 23 2004
Loc: Va. Beach, Va
Re: Carb selection - upgrade stock 318 to 4 barrel-Options? [Re: Chris2342]
      #5620319 - Sun Nov 22 2009 10:14 AM

360 heads, thermoquad and a stock 68 MT 340 cam and some headers and duals. That ought to make a decent running car.

--------------------
77 Macho Power Wagon LWB factory 440
70 Coronet 440 N code 3 speed


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