Author Topic: Marine Carb  (Read 2476 times)

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Offline fireman24mn

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Marine Carb
« on: May 25, 2017, 11:02:37 AM »
What is everyones opinion on carbs.  Holly? Rochester? Edelebrock? Etc.

I need to get a carb for the 23, the donar boat only has a 2 barrel so that won't work. I will be putting it on a 383 with about 360 hp.

Thoughts/ recommendations?
I think this has become an addiction.


1977 CV-23 I/O Full Resto complete
1976 CV-16 V8 Resto in progress
1985 Pearson MotorYacht 43ft

Offline Plugcheck

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Re: Marine Carb
« Reply #1 on: May 25, 2017, 11:12:34 AM »
Qjet would be my first choice.
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline Jason

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  • 1974 CV16SS, 1986 CV23
Re: Marine Carb
« Reply #2 on: May 25, 2017, 12:03:38 PM »
I know Red really liked the Edelbrocks. I always been more of a Holley guy never had one for a marine motor.
Jason S.
1974 Glastron Carlson CV16SS 140 I/O
1986 Glastron Carlson CV23 260 I/O

Offline Plugcheck

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Re: Marine Carb
« Reply #3 on: May 25, 2017, 01:29:34 PM »
Qjets come in 750 and 800 cfm models.  Your mouse at 6000 rpm will consume about 665 cfm.  Roughly 100 cfm less at 5000 rpm.  (CID*RPM)/3456.   Spreadbores have an advantage by having small primaries for excellent response, and large secondaries for WOT.  Economy and top end power.
Michael
1979 CVZ-18 388 CI Vortec Mouse
1980 CVX-16SS 140 Mercruiser
1979 CVX-16 Johnson 175
2002 Bennington 2275CC 90 Mercury
1985 Intimidator project
1989 Lowe 200 Redneck fishin Toon
2001 Godfrey Sweetwater pontoon 115 Rude

Offline Glastronjohn18

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Re: Marine Carb
« Reply #4 on: May 25, 2017, 06:58:10 PM »
I prefer Holly because that's what I'm most familiar with. Mike makes a good point about the balance of economy and power with the Q-Jet's small primary and larger secondaries. I've never run an Edelbrock but they seem to be similar to the Q-jet. For me Holley's are a little easier to tune. With their needle jets Q-Jets remind me of a big snowmobile carb. Q-jets have a bit of an unfavorable reputation because tuning the needles is unfamiliar to some people. In my opinion this reputation is undeserved, as a properly tuned Q-jet is a fine carb. In the end it boils down to the proper size (the biggest is not always the best ) and what you're most comfortable working with. For me an electric choke and vacuum secondaries  would be the options of choice on a marine carb.
John
'80 CVX 18 - Survivor Class
'78 CVX 18
'76 V 225 -   Bal Harbor
'80 V195XL
'86 CVX 18- And '86 Makes 3