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Author Topic: Bigger carb for my nailhead  (Read 1379 times)

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Offline BuickGSrules

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Bigger carb for my nailhead
« on: June 22, 2012, 03:04:05 PM »
Thinking of giving my nailhead a bigger carb. I am running the stock one now, runs good but I have read some times that it likes bigger ones. What would you guys suggest? It has to look pretty stock still.
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Jan

1965 Gran Sport HT
1966 Wildcat 3 speed 1 of 23
1970 GS350 4 speed delete car

Offline Brian

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Re: Bigger carb for my nailhead
« Reply #1 on: June 22, 2012, 04:02:42 PM »
Best performance upgrade is to find one of the 66 nailhead quadrajet intakes and quadrajet carb.  All 66 Riverias had the quadrajet setup on the 425 in them.
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'64 Skylark 2dr ht 4 speed, 300-4
'65 GS ht, 4 speed,2-4s,AC,PS,PB,PW,Pseat,Tilt
'66 Skylark 2dr ht 300-2 automatic
'78 Yamaha DT 400 2 stroke
'88 Ford F-150 4x4 (used to be 4x2)
'89 Ford F-350 4x4
'03 Honda Accord Coupe V6 6-speed manual (daily driver)

Offline GranSportWagon

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Re: Bigger carb for my nailhead
« Reply #2 on: June 22, 2012, 06:47:23 PM »
Brian I agree with the upgrade but would continue on to the early seventies 800 cfm q jet.
Mike S.
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Offline BuickGSrules

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Re: Bigger carb for my nailhead
« Reply #3 on: June 23, 2012, 06:10:08 AM »
I actually have a 800 cfm Q-jet on my 350 4 speed right now, and when I swap my 464 in that one I could use the 800 on the nail and see what that does.
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Jan

1965 Gran Sport HT
1966 Wildcat 3 speed 1 of 23
1970 GS350 4 speed delete car

Offline a+autobody

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Re: Bigger carb for my nailhead
« Reply #4 on: June 23, 2012, 06:03:49 PM »
I think I have a manifold with that carb on it I will check tomorrow and post.
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