New carb for 351C 4V????

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TheRktmn
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Re: New carb for 351C 4V????

#11

Post by TheRktmn » 09 Sep 2018, 10:19

After years of messing with Edelbrock, Demon and Holly carbs I finally installed a Summit M2008 series carb.
Imagine if Holley and Autolite had a baby - the best features of both in one carb. You'd get the M2008.

https://www.summitracing.com/search/bra ... ner=SREPD5

I have both the 600 and 750 with vac secondaries and electric choke. Both ran great on my 460 right out of the box, no adjustments required.
Bob

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'69 Cougar XR7, 460/C6. Caution: This car fitted with optional Caution Fan Sticker option!
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badcatt
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Re: New carb for 351C 4V????

#12

Post by badcatt » 09 Sep 2018, 10:58

by TheRktmn » 28 minutes ago
After years of messing with Edelbrock, Demon and Holly carbs I finally installed a Summit M2008 series carb.
Imagine if Holley and Autolite had a baby - the best features of both in one carb. You'd get the M2008.
Image

That looks a lot like this ond Holley carb,
Image
Neal Jacobson.
1970 XR-7 White "Ginger"
1970 XR-7 Convertible Blue
1971 XR-7 Bright Blue with Blue "Up Beat" interior
1970 Standard 428CJ Competition Yellow The New Money Pit.
See ya on the hiways,
The political and commercial morals of the United States are not merely food for laughter,
they are an entire banquet
.
- Mark Twain -

7TXR7
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Re: New carb for 351C 4V????

#13

Post by 7TXR7 » 09 Sep 2018, 12:06

I run a Quickfuel HR 680 VS on my mild street build Cleveland. Great carb, its a basic Holley design with many upgraded features including more tuneability out of the box.

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bsbeck
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Re: New carb for 351C 4V????

#14

Post by bsbeck » 09 Sep 2018, 12:32

I picked up an inline fuel filter today. I got the steel canister type. Hopefully the guy will get to my car this week and try to tune this Edelbrock. What's everyone's thoughts on whether to go 600 or 750/780 cfm if I do have to replace the carb? This Edelbrock 1407 is a 750 cfm.

I do like the prices of those Summit carbs. Impressive!!!
Scott B.

1970 Cougar Eliminator (Competition Blue / Black Comfortweave)
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Cougars_R_Grr8
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Re: New carb for 351C 4V????

#15

Post by Cougars_R_Grr8 » 09 Sep 2018, 13:49

Makes me think about swapping out the 1v for a 2v on the F100
'68 Standard Cougar - 302 4v J Code 4 spd (1 of 536) *SOLD*
'73 F250 XLT Ranger - 390 *Also SOLD*
'63 F100 Stepside - *NEW PROJECT*
'14 Camaro SS vert
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cyclonelou
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Re: New carb for 351C 4V????

#16

Post by cyclonelou » 09 Sep 2018, 14:00

Just slow down and take a deep breath. Get that car to someone who knows what they're doing. Royce is correct in that perceived carb problems may be traced to ignition bugs.He's quite knowledgeable so follow his advice.Go through all systems with a fine toothed comb before you spend any amount of money needlessly on a new carb and all sorts of other things.
That 750's not too big if everything underneath it is O.K.Unless of course someone has messed it up while trying to adjust it with a pipe wrench.On a 3rd 351W I have a Holley 750 vac sec and I'm not having any problems on what can be considered a warmed up baby doll cruiser.(Truth be known it'd run better w/a 600 but that's a long story I won't even get into).
But if you just can't wait to buy another carb then go to a 600 as too small is better than too big in the case of a street car that needs good manners.The brand of carb? Well just take your pick.

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bsbeck
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Re: New carb for 351C 4V????

#17

Post by bsbeck » 09 Sep 2018, 14:53

Well I'm going to give this guy a shot at tuning it and getting everything squared away before I try anything else. I'll keep everyone posted to what happens. Thanks again to everyone who commented.
Scott B.

1970 Cougar Eliminator (Competition Blue / Black Comfortweave)
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badcatt
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Re: New carb for 351C 4V????

#18

Post by badcatt » 09 Sep 2018, 16:14

bsbeck wrote:
09 Sep 2018, 14:53
Well I'm going to give this guy a shot at tuning it and getting everything squared away before I try anything else. I'll keep everyone posted to what happens. Thanks again to everyone who commented.
I think that is a good plan.
Neal Jacobson.
1970 XR-7 White "Ginger"
1970 XR-7 Convertible Blue
1971 XR-7 Bright Blue with Blue "Up Beat" interior
1970 Standard 428CJ Competition Yellow The New Money Pit.
See ya on the hiways,
The political and commercial morals of the United States are not merely food for laughter,
they are an entire banquet
.
- Mark Twain -

legendarylimeaz
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Re: New carb for 351C 4V????

#19

Post by legendarylimeaz » 09 Sep 2018, 16:26

I have a 600 cfm holley on the cougar (electric choke vacuum secondaries ) and it works great, I just finished rebuilding the 390 in my F100, put a factory reconditioned 600 holley with electric choke and vacuum secondaries on it (less than 200 bucks online) right out of the box its also working great.
Legendarylimeaz
1969 Base Coupe 351 Windsor FMX
1969 F100
2016 F250 Diesel
1993 Dodge 1st Gen Cummins
2001 Jeep Cherokee

cyclonelou
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Re: New carb for 351C 4V????

#20

Post by cyclonelou » 09 Sep 2018, 17:51

I'll chime in once more-
Make sure all your fuel lines are clear and compatible with today's gas, especially the 3-4 inch length line from the gas tank sending unit to the hard line . If that line is old it will collapse on the inside and make the engine seem to "suck air". This is often overlooked as it's out of sight and out of mind. As is the tank unit's sock perhaps being clogged up. But the unit has to be pulled which is no big deal but be sure to have a new square cut O-ring when reinstalling. A round O-ring and the old one cannot be used but the new ones are only like $1.50 or so and you just might be able to still get one at a Ford dealership or Mustang/Cougar parts vendor.
And that 750? I put together a 351C4V, wide ratio 4 speed w/2.75 gears and it ran like gangbusters w/Holley 750 vac. secs. But that was 40 years ago and another story.

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