What is the c.f.m on this Q-Jet 17080563

Ron Miller · 01-31-2010, 12:47 PM

Any body out their know the c.f.m on this Q-Jet. It was used on 25 ft Formula 7.4 Liter boat Marine Carburetor Number is 17080563. The Guy is claiming it is a 850 c.f.m. I thought most Q-Jets were either 750 or 800 c.f.m

Thanks for looking,

Ron

NORMAN BARNARD · 01-31-2010, 01:46 PM

Ron, google says it's for the application you described but the cfm is 750.......not what was being claimed. Hope this helps .....norm

Alan Roehrich · 01-31-2010, 01:57 PM

The 800 cfm QJets were mostly found on engines other than Chevrolet. I used to build boat QJets for local marinas and boat shops, I never saw anything but a 750 QJet on a Chevy V8 boat engine, from the factory.

Ron Miller · 01-31-2010, 07:38 PM

Norm & Al,

Thanks for the replies and info. Man, I was hoping this was indeed a 850 c.f.m Q - Jet. I had big plans for it on my 12.5 comp Street/Strip 461 project. I guess I will pass, I have several 750 c.f.m older Q-Jets.

Thanks Again,

Ron

Tom Moock · 02-01-2010, 01:46 AM

Alan, not all chevy O-jet carbs are 750; in the late 70`s and early 80`s, i`ve found 800 on 305 chevy motors. Tom

Alan Roehrich · 02-01-2010, 07:23 AM

Exactly why I said "mostly", Tom. You almost never know what you'll find for sure, just what you should find.

01-31-2010, 12:47 PM	#1
Ron Miller Member Join Date: Mar 2002 Location: Brownstown, Mi 48134 Posts: 196 Likes: 35 Liked 13 Times in 7 Posts	What is the c.f.m on this Q-Jet 17080563 Any body out their know the c.f.m on this Q-Jet. It was used on 25 ft Formula 7.4 Liter boat Marine Carburetor Number is 17080563. The Guy is claiming it is a 850 c.f.m. I thought most Q-Jets were either 750 or 800 c.f.m Thanks for looking, Ron

01-31-2010, 01:46 PM	#2
NORMAN BARNARD Member Join Date: Mar 2006 Location: EL PASO, TEXAS Posts: 156 Likes: 0 Liked 2 Times in 2 Posts	Re: What is the c.f.m on this Q-Jet 17080563 Ron, google says it's for the application you described but the cfm is 750.......not what was being claimed. Hope this helps .....norm

01-31-2010, 01:57 PM	#3
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,090 Likes: 1,534 Liked 1,758 Times in 398 Posts	Re: What is the c.f.m on this Q-Jet 17080563 The 800 cfm QJets were mostly found on engines other than Chevrolet. I used to build boat QJets for local marinas and boat shops, I never saw anything but a 750 QJet on a Chevy V8 boat engine, from the factory. __________________ Alan Roehrich 212A G/S

01-31-2010, 07:38 PM	#4
Ron Miller Member Join Date: Mar 2002 Location: Brownstown, Mi 48134 Posts: 196 Likes: 35 Liked 13 Times in 7 Posts	Re: What is the c.f.m on this Q-Jet 17080563 Norm & Al, Thanks for the replies and info. Man, I was hoping this was indeed a 850 c.f.m Q - Jet. I had big plans for it on my 12.5 comp Street/Strip 461 project. I guess I will pass, I have several 750 c.f.m older Q-Jets. Thanks Again, Ron

02-01-2010, 01:46 AM	#5
Tom Moock Senior Member Join Date: May 2004 Posts: 801 Likes: 1 Liked 10 Times in 6 Posts	Re: What is the c.f.m on this Q-Jet 17080563 Alan, not all chevy O-jet carbs are 750; in the late 70`s and early 80`s, i`ve found 800 on 305 chevy motors. Tom __________________ Tom Moock 5704 STK

02-01-2010, 07:23 AM	#6
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,090 Likes: 1,534 Liked 1,758 Times in 398 Posts	Re: What is the c.f.m on this Q-Jet 17080563 Exactly why I said "mostly", Tom. You almost never know what you'll find for sure, just what you should find. __________________ Alan Roehrich 212A G/S