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Carburator sizing

  
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Carburator sizing

 
dtierney dtierney
New User | Posts: 18 | Joined: 09/08
Posted: 10/27/09
02:31 PM

I am trying to select a new carb for my new engine. Running a Holley 700 DP now. Its old and might be to small now. Its a 66 GTO, 400, 60 over,around 9.2:1,ported heads should be flowing 240 on the intake, Comp Cam XE274, 274 286  duration .488 .491 lift , performer RPM intake, 4 speed Muncie with 355s in the rear for now.I am thinking about a Holley 800 DP or vac secondary. Its hard I know without testing but Im interested in educated opinions. Thanks in advance!

Dave  

 
Pontiacman8 Pontiacman8
Guru | Posts: 1417 | Joined: 02/08
Posted: 10/29/09
06:54 AM

A 750CFM Holley carburetor will be fine for your set up.  
professional hi-performance engine builder

Horsepower sells engines and torque wins races

 
Opontee Opontee
New User | Posts: 43 | Joined: 07/09
Posted: 10/29/09
10:43 AM

Go with the HP series Holley. They are more responsive.  

 

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