Carbs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shawn · 05-03-2002, 11:02 AM

I was trying to find a way to search previously posts on the carb subject but could not find anything. So I will ask again even though I sure it has been asked 1,000,000 times before.

402 BB stock 72 chevy
What CFM should I look for when buying a holley. I want the biggest possible performance I can get without drowning out the engine. 650 to 700 CFM? I will be adding higher performance parts in the future which should get me to 400 horsies but for now it is running stock horses....700 CFM too much? What about a Holley intake manifold and carb combo as far as p/n's?

Any suggestions?

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1972 Cheyenne Super 88K miles
2002 Impala (real nice)

http://community.webshots.com/user/shawn72chevy

Wichita, KS

Beast388 · 05-03-2002, 12:00 PM

I have a 3310-3 750 cfm Holley on my 388 stroker but it is anything but stock. I would think that 700 to 750 cfm would be about right.

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71 GMC Suburban 4X4
The "Beast"
388 CID Stroker, Scat crank, H-beam steel rods, KB Pistons, Speed-Pro Moly Rings, Clevite bearings, Speed-Pro High Volume oil-pump, Comp Cams 254H 4X4 Xtreme cam, SR Torquer 2.02/1.60 heads, Comp springs, Trick Flow pushrods, Comp Roller Rockers, Edelbrock Performer RPM intake, 3310 750cfm Holley, Summit HEI, MSD 6AL, Built TH350 Transcat Supper II shift kit 2000 RPM Stall, 4" Rough Country Lift....etc.

Big69C20 Toy · 05-03-2002, 12:02 PM

I've got an Edelbrock 750cfm carb on my 396 with some minor mods. Runs fine once it gets started. li'l cold chevy is all, nothing i'm not used to

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69 Custom 20, 396BB,Longbed fleetside.
New Oak Bed With SS strips... damn nice.

Edelbrock performer RPM-O, Edelbrock 750Carb, Headers, HEI, 2 40" glasspacks.
Stereo: Classic-style tape deck/radio, 2 6x9 Cerwin Vega's in doors, 2 10" Neo subs under seats, 1 900 Watt amp.

SN= Ares220

1-PU70 · 05-03-2002, 12:43 PM

Im running a Holley 650 spread bore on a stock 72-402 and is not enough carb. Im going to switch to a 750 Q-Jet.

**Desert Rat** · 05-03-2002, 12:51 PM

I have a 600 Edelbrock on my 402 and it runs sweet,not to lean-it revese fast.I also have a 750 Edelbrock on a 396 and it runs rich,and i dont like it as much as the 600,im gonna drop the jet size and play with it.

**Desert Rat** · 05-03-2002, 12:54 PM

And personally i wouldnt use a Holley,run a Qjet(if it works right)or a Carter/Edelbrock.I have couple crates full of Holleys,if i buy something with one i pull it off,even if its running good,because before long it wont,but im sure alot of people swear buy them.Id probably use one on a Street Toy,or Drag Car but not on my dailt drivers

mark25 · 05-03-2002, 05:47 PM

Buy an edelbrock over a holley, you'll thank us all later!! i know from personal experience!!!!! HOLLEY SUCKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Longhorn Man · 05-03-2002, 07:04 PM

I'd run a quadrajet over a holley any time...and I hate quadra-jets.
Get an Eldebrock.
I'd go 750.

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'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

05-03-2002, 11:02 AM	#1
shawn Registered User Join Date: Aug 2001 Location: Wichita Kansas Posts: 104	Carbs I was trying to find a way to search previously posts on the carb subject but could not find anything. So I will ask again even though I sure it has been asked 1,000,000 times before. 402 BB stock 72 chevy What CFM should I look for when buying a holley. I want the biggest possible performance I can get without drowning out the engine. 650 to 700 CFM? I will be adding higher performance parts in the future which should get me to 400 horsies but for now it is running stock horses....700 CFM too much? What about a Holley intake manifold and carb combo as far as p/n's? Any suggestions? ------------------ 1972 Cheyenne Super 88K miles 2002 Impala (real nice) http://community.webshots.com/user/shawn72chevy Wichita, KS __________________ 1972 Cheyenne Super 88K miles 2002 Impala (real nice) http://community.webshots.com/user/shawn72chevy Wichita, KS

05-03-2002, 12:00 PM	#2
Beast388 Suburbans RULE! Join Date: Jan 2000 Location: Clinton, IA 52732 Posts: 689	I have a 3310-3 750 cfm Holley on my 388 stroker but it is anything but stock. I would think that 700 to 750 cfm would be about right. ------------------ 71 GMC Suburban 4X4 The "Beast" 388 CID Stroker, Scat crank, H-beam steel rods, KB Pistons, Speed-Pro Moly Rings, Clevite bearings, Speed-Pro High Volume oil-pump, Comp Cams 254H 4X4 Xtreme cam, SR Torquer 2.02/1.60 heads, Comp springs, Trick Flow pushrods, Comp Roller Rockers, Edelbrock Performer RPM intake, 3310 750cfm Holley, Summit HEI, MSD 6AL, Built TH350 Transcat Supper II shift kit 2000 RPM Stall, 4" Rough Country Lift....etc. __________________ --Ben 71 GMC Suburban 4X4 The "Beast" 388 CID Stroker, TH350, NP205, 8-lug D44, 14BFF w/ Detroit, 4.10:1 gears, 4-Wheel Disks 4" Lift, 35" MT/R's.

05-03-2002, 12:02 PM	#3
Big69C20 Toy Livin' it up. Join Date: Nov 2001 Location: Richland, MI Posts: 2,212	I've got an Edelbrock 750cfm carb on my 396 with some minor mods. Runs fine once it gets started. li'l cold chevy is all, nothing i'm not used to ------------------ 69 Custom 20, 396BB,Longbed fleetside. New Oak Bed With SS strips... damn nice. Edelbrock performer RPM-O, Edelbrock 750Carb, Headers, HEI, 2 40" glasspacks. Stereo: Classic-style tape deck/radio, 2 6x9 Cerwin Vega's in doors, 2 10" Neo subs under seats, 1 900 Watt amp. SN= Ares220 __________________ -Greg; Sold the 69 C20. It's off to a better home with more love! Now onto the 86 CUCV M1009; K5 blazer with 6.2L diesel, corp 10 bolt axles, Detroit locker in the rear, trutrac front, 3.73 gears, 35" tires.

05-03-2002, 12:43 PM	#4
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	Im running a Holley 650 spread bore on a stock 72-402 and is not enough carb. Im going to switch to a 750 Q-Jet. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

05-03-2002, 05:47 PM	#7
mark25 Registered User Join Date: Feb 2000 Location: Vassar,Ks 66543 Posts: 375	Buy an edelbrock over a holley, you'll thank us all later!! i know from personal experience!!!!! HOLLEY SUCKS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! __________________ '72 C-10 Cheyenne Super, 402/TH400, Bucket Seats, tilt, tach, AM/FM & shoulder harnesses and a ground up restoration

05-03-2002, 12:51 PM	#5
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	I have a 600 Edelbrock on my 402 and it runs sweet,not to lean-it revese fast.I also have a 750 Edelbrock on a 396 and it runs rich,and i dont like it as much as the 600,im gonna drop the jet size and play with it.

05-03-2002, 12:54 PM	#6
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	And personally i wouldnt use a Holley,run a Qjet(if it works right)or a Carter/Edelbrock.I have couple crates full of Holleys,if i buy something with one i pull it off,even if its running good,because before long it wont,but im sure alot of people swear buy them.Id probably use one on a Street Toy,or Drag Car but not on my dailt drivers

05-03-2002, 07:04 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I'd run a quadrajet over a holley any time...and I hate quadra-jets. Get an Eldebrock. I'd go 750. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio



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