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What kind of carby do you run? 

 

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 Post subject: What kind of carby do you run?
Posted: Wed Apr 19, 2006 7:13 pm 
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Howdy

Just wondering what kind of carby you guys and gals run on your 351c?

I have to get my thermoquad rebuilt and am thinking another carby
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Posted: Wed Apr 19, 2006 7:28 pm 
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get the thermoquad rebuilt

 

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Posted: Wed Apr 19, 2006 7:45 pm 
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Ride: Ford FPV FG F6 310

Power: 149 rwkw

Location: Brisbane
QLD, Australia

yeah i've heard quite good things about the ol' thermoquad's and you can't get defected with a standard carby.
i got a 600 holley, it's too small for my 351, and so is the pump, but it pulls hard 0-130km/h.

 

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Posted: Wed Apr 19, 2006 7:59 pm 
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yeah everyone thinks the thermoquads are good, but u really have to look hard to find someone who can set them up just right these days. I run a Holley 770 Street Avenger, also probably just a little small but does the trick.

 

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Posted: Wed Apr 19, 2006 8:05 pm 
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Ride: Ford FPV FG F6 310

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what sort of power are you making mikgan?

 

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Posted: Wed Apr 19, 2006 8:56 pm 
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got some gremlins, but 190ish rwkw last time, but some major gremlins, expect 220+rwkw. still using a single 2" exhaust! ewww!

 

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Posted: Wed Apr 19, 2006 9:40 pm 
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I was thinking about this carby

http://www.holley.com/0-80508S.asp
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Posted: Wed Apr 19, 2006 11:05 pm 
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be pretty good, tho IMO for street use a 650 is all you'll need

 

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Posted: Thu Apr 20, 2006 7:03 pm 
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Standard 351c ran autolite or 780 holley (GT etc)
351W gtho standard ran 600cfm holley mine runs tricked up 780 cfm or 725 double pumper. :D
My XC 302 runs a 351 carter thermoquad Tricked up. :twisted:

 

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Posted: Sat Apr 22, 2006 3:01 pm 
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i have a 302 clevo, and feeding the fuel is a 500 2barrel Holly, seems to do its job quite well :D

 

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Posted: Sat Apr 22, 2006 9:17 pm 
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I have a 650 spreadbore holley on a 351C and a 450 Squarebore on a 302C. I don't have power figures on either of them.

Working on 85% VE (a respectable street 351) @ 6000rpm, it's only 520cfm. 100% VE @ 8000rpm = 813cfm

Using these values my 302 is carbied just right, the 351 is oversize. Not to worry, EFI is getting closer each day.

 

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Posted: Sun Apr 23, 2006 2:31 am 
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Ride: XB 351 V8 & BA GT

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Are the thermoquads squarebore or spreadbore?

 

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Posted: Sun Apr 23, 2006 2:52 am 
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spreadbore

 

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Posted: Mon Apr 24, 2006 9:10 pm 
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The VE calculators are not the best guideline because carby flow rating are calculated at a vaccum depression. 1.5hg for 4 barrels, and 3hg for 2 barrels. Flowbenches require a restriction to measure flow.

Anything over 1hg of manifold vaccum at WOT is starting to become a restriction.

Thermoquads are good carbies but are limited on parts and tuning know how. If setup correctly a thermoquad makes an excellent carby.

You can't go wrong with a Holley 3310 750 vac sec, very tuneable carby.
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Posted: Tue Apr 25, 2006 1:09 am 
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im running an 830 annular discharge, the thermoquads, or the quadrajets can go really well, but you need to find someone who knows what they are doing with them.

If your going to go with an aftermarket carb, id suggest go for a double pumper over a vac secondary. It gives you more room to improve the combo down the track, however you will need to revise your driving style to suit.
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