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Topic: carburetor clearance issues

in Forum: C3 Engines

carburetor clearance issues

Posted: 12/18/10 11:24am Message 1 of 15
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West Bend, WI - USA
Joined: 3/18/2010
Posts: 46
Vette(s): 1985 silver coupe & 1975 red coupe
Hello! Please help, need info. I installed a 350CI GM crate motor into my 1975 Vette for more zip. The thing has vortech heads which limited which intake manifold to use. I did use a Edelbrock #2116 manifold and it seems a bit high. The company told me it's the lowest one they make for my engine because of the heads. I have been told to use a Holley Avenger #670 carb with a drop-down air cleaner and that set up would give me room to the under side of the hood. Really don't want to get into high rise hood's, etc. Also, who makes drop-down type air cleaners that may work? Can anyone out there offer some advise? MERRY CHRISTMAS !!!!  Darrell


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carburetor clearance issues

Posted: 12/18/10 11:59am Message 2 of 15
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HOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
Darrell, I had a K&N filter kit with a drop base. I also went from a 3" to a 2" filter which added even more clearance.

This should work with a 14" filter and lid:





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carburetor clearance issues

Posted: 12/18/10 12:00pm Message 3 of 15
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Former Member
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York, PA - USA
Joined: 5/18/2010
Posts: 1518
Vette(s): 1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top
Hey Darrel. .have you put the hood on yet or are you way beyond that now...I would make sure that the carb will bolt right to the intake without an adapter plate..they can add a half inch..not sure if a #670 holley will bolt to that intake without one...
Rich



My first parade at Carlisle 2010

carburetor clearance issues

Posted: 12/19/10 8:53am Message 4 of 15
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Joined: 12/17/2010
Posts: 21
Vette(s): 1982 Collector Edition 400 HP ZZ4 and 5 Speed TKO500. 3.54 Rear
Darell,
 
Check out MassFlow Injections site.  Chris there uses a very low profile intake that he modifies for the injectors.  I believe its a Edlebrock, but he can advise. 
 
Regarding a low air cleaner, check out K&N 14" round with a 4" drop.  I used this on my 82 and it worked great.  Part numbers 601263 for a 3  601264 for a 4"



carburetor clearance issues

Posted: 12/19/10 10:55pm Message 5 of 15
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Jacksonville, FL - USA
Joined: 12/15/2009
Posts: 36
Vette(s): 79 L-82 4-speed. Original block now a 383 with aluminum heads, roller cam and rockers, Edelbrock intake, MSD distributor and ignition module, Speed Demon 650 carb. Rebuilt and upgraded all steering and suspension.
A large choice of dropped air cleaners is online at Summit Racing:
 
Scroll through and check the specs on several.  Many give the net height above carb flange.  I am still trying to figure which one will allow me to use the best intake manifold and keep the stock hood. 
 
Does anyone know how much the dropped air cleaners may reduce total air flow because of the shorter filter that is also partly below the carb flange?  Perhaps they don't reduce it at all since the filter is open all the way around, unlike the OEM.
 
  I don't want to defeat the purpose of a high-rise manifoild by restricting flow through the air cleaner.  Thanks.  Happy holidays!



carburetor clearance issues

Posted: 12/20/10 5:33am Message 6 of 15
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Morganville, NJ - USA
Joined: 1/25/2009
Posts: 92
Vette(s): 1971 350 270 hp roadster millivanilli red, black interior, white rag top, white hard top, I've had it 18 years and intend on giving it to my son for his 25th birthday(another 18 years from now)
God hates a coward ! Go for the L 88 hood and if thats not in the budget cut a hole and get the tunnel ram Wink


carburetor clearance issues

Posted: 12/20/10 7:25am Message 7 of 15
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Sykesville, MD - USA
Joined: 4/27/2008
Posts: 4239
Vette(s): 1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops
You tell 'em, Bill!
 
Barry
 
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carburetor clearance issues

Posted: 12/20/10 8:36am Message 8 of 15
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Former Member
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Jacksonville, FL - USA
Joined: 12/15/2009
Posts: 36
Vette(s): 79 L-82 4-speed. Original block now a 383 with aluminum heads, roller cam and rockers, Edelbrock intake, MSD distributor and ignition module, Speed Demon 650 carb. Rebuilt and upgraded all steering and suspension.
Well Per4mance, as a retired US Army paratrooper with two tours in Viet Nam and one in Desert Storm I believe I have proven I am not a coward.  Your advice was not funny and not helpful.  If you don't know anything helpful to reply to a post please be courteous enough to refrain.
 
It is not a question of budget, I can buy anything I want, I just want to keep the stock hood.  Anyone else have any friendly and helpful advice?



carburetor clearance issues

Posted: 12/20/10 9:16am Message 9 of 15
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York, PA - USA
Joined: 5/18/2010
Posts: 1518
Vette(s): 1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top
Hey BC..I have looked at a few of those drop down air filter kits and you ask if they reduce flow..as long as the filter is the same height and diameter as the stock one it will actually flow more..due to the curve design of the drop down.. flow will be boosted even though a small amount..I would look for a K&N filter..I like the old school oiled air filters like that..they cost more but you can reuse them..I didn't see what intake you want to put on your car but sometimes the manufacturer that you bought one or will buy from knows what will fit under there..they have been there done that..also have you changed anything else with the engine..that makes a difference in what intake you get also..I think the first one that comes up is nice..all black wrinkle design..the Pro 141-752 drop is a inch and a half..I searched most of them that I could find and it had the most actual drop..not sure if it fits the Q jet you have but it says it does..not sure also if it has interference with the throttle or EGR valve being it goes down so far..should be albe to fit alot of different intakes with that much drop..does your car have that cowel induction??..that makes things up a  good bit also..
Rich

Ps..
Thanks for your service...
I hope I can help in the future..
yostusota2010-12-20 09:48:43



My first parade at Carlisle 2010

carburetor clearance issues

Posted: 12/20/10 10:42am Message 10 of 15
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Morganville, NJ - USA
Joined: 1/25/2009
Posts: 92
Vette(s): 1971 350 270 hp roadster millivanilli red, black interior, white rag top, white hard top, I've had it 18 years and intend on giving it to my son for his 25th birthday(another 18 years from now)
Well Darrell, since you don't have a sense of humor about this, I'll tell you how to check your clearances.Put on your set up you have now and see if your hood closes with  whatever air cleaner setup you got and roll up some playdough around the air cleaner and close the hood, lift it up and that should give you the distance of room you have to work with .


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