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Topic: chage a Qudrajet M4MC toa Holley 4150

in Forum: C3 Fuel, Emission Control, and Exhaust Systems


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chage a Qudrajet M4MC toa Holley 4150

Posted: 7/29/03 12:39am Message 1 of 10
jerome
Former Member
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France
Joined: 7/16/2003
Posts: 45
Vette(s): C3 1979 L-48 th350 96000miles
Ecuse me for my english because i'm french

So i want to know, if it's possible/usefull to remove my Rochester Quadrajet M4MC et take a Holley 4150.

ps: it's for a 1979 L48 with non stock air filter and non stock exhaust system


|saluteflag|


|IMG|http://jerome.laurent6.free.fr/Ma%20Crovette/3%204%20avant%20signature.jpg|/IMG| |IMG|http://jerome.laurent6.free.fr/Smilies/la%20fance.gif |/IMG| I'm french so excuse me for my english
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chage a Qudrajet M4MC toa Holley 4150

Posted: 7/29/03 2:58am Message 2 of 10
Smallblock
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Cape Coral, FL - USA
Joined: 7/10/2003
Posts: 114
Vette(s): 1979 Black/red L48
Jerome,
Welcome to the C3VR Forum.. Can't help ya with the Holley but if that Qjet isn't giving you any problems I would keep it.. They are excellent carbs plus they are easy to rebuild....


Roy |saluteflag|


chage a Qudrajet M4MC toa Holley 4150

Posted: 7/29/03 4:34pm Message 3 of 10
privategod
Former Member
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Toledo, OH - USA
Joined: 9/4/2002
Posts: 147
Vette(s): 1976 Stingray, L48 auto Buckskin/Buckskin Leather originally. Numbers matching.
The Holley 4150/4160 series carbs are a "square bore" design, and your Quadrajet M4MC is a "spread bore" design, so the Holley will not fit a stock Quadrajet intake manifold without using an adapter.


http://www.holley.com/HiOctn/ProdLine/Products/FMS/FMSCA/17-6.html

Or you could use a Holley 4175 series carb, it is a "spread bore", and will fit your stock Quadrajet intake manifold.

|UPDATED|7/29/2003 4:34:23 PM|/UPDATED|



'76 L48 Auto Project |IMG|http://www.freewebs.com/privategod/Mine2a.JPG |/IMG|

chage a Qudrajet M4MC toa Holley 4150

Posted: 7/29/03 8:21pm Message 4 of 10
Mr69Vett
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DE PERE, WI - USA
Joined: 12/9/2001
Posts: 231
Vette(s): 1969 350, 4-spd, 3.53 gear, side exhaust, custom mix yellow PPG base/clear Brilliant Yellow
Also WELCOME Jerome to the C3VR, another thing is when us use the adapter your going to increase the height of the card at least another 1/2", I know you guys are metric over there, but figure another fingers width.

Good luck with the carbs, I have been playing musical carbs with mine for the last 2 years and I'm still not happy, close but still needs work, and they were all Holleys......... |headscratch|

Dave
Mr69vett |smokin|


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chage a Qudrajet M4MC toa Holley 4150

Posted: 7/30/03 12:44am Message 5 of 10
jerome
Former Member
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France
Joined: 7/16/2003
Posts: 45
Vette(s): C3 1979 L-48 th350 96000miles
thanks for your reply !
ok so i keep my rochester and I rebuild it this week-end

|thumb|

|UPDATED|7/30/2003 12:44:17 AM|/UPDATED|



|IMG|http://jerome.laurent6.free.fr/Ma%20Crovette/3%204%20avant%20signature.jpg|/IMG| |IMG|http://jerome.laurent6.free.fr/Smilies/la%20fance.gif |/IMG| I'm french so excuse me for my english

chage a Qudrajet M4MC toa Holley 4150

Posted: 7/30/03 10:25am Message 6 of 10
Ron 78
Lifetime MemberLifetime Member
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BINGHAMTON, NY - USA
Joined: 7/19/2003
Posts: 3808
Vette(s): ......
jerome; once you get the carb off ,wiggle the throttle shaft around to see how loose the shaft is in the base of the carb if is very loose dont waste your time rebuilding it.get a rebuilt or new Q-jet or go for the holley ,just make sure it's a spreadbore unless you want to change the manifold too . ron 78 |thumb| |wavey| |bouncy|


C3VR Lifetime Member #93

chage a Qudrajet M4MC toa Holley 4150

Posted: 4/1/04 1:45pm Message 7 of 10
oldfart
Former Member
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SW Ranches, FL - USA
Joined: 4/1/2004
Posts: 8
Vette(s): 70 big block 4-speed covertible, 78 w/TPI conversion.
Stick with the Q-jet. A 4150 is way tto much carb for your engine. You'd take a performance hit. I have a spread-bore Holley, professionally rebuilt, for sale if you love Holleys. |biggrin|


Jesus saves!|B| |/B|

chage a Qudrajet M4MC toa Holley 4150

Posted: 4/1/04 8:07pm Message 8 of 10
BacaBill
Former Member
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Toms River, NJ - USA
Joined: 3/24/2003
Posts: 105
Vette(s): '79 L82 4spd
 oldfart said: Stick with the Q-jet. A 4150 is way tto much carb for your engine. You'd take a performance hit. I have a spread-bore Holley, professionally rebuilt, for sale if you love Holleys. |biggrin| 


How much are you looking to get for the Holley? What size is it?


EdelBrock Performer w/ 750 doub pumper,port/polished heads, triple cut valves w/4th cut down the throat of the exhaust valves, 286 Comp Magnum cam, 1.6 roller rockers, ball-peen pushrods w/guides, screw in rocker studs w/girdles, Comp double-roller chain, , hi-rise valves covers w/ spacer (needed for the girdles), Flowtech by Holley long-tube ceramic coated headers into Stage II pipes (no cats), chrome wire looms for the MSD 8.5 mm wires, MSD 50,000v coil kit w/advance springs, cap, rotor, module, steel-braided radiator,heater,vacuum hoses, Infinity Kappa 4x6 plates (dash), Sony Xplode 6 3/4" (rear), chrome T-stat housing, A-arm shields, B&M Hammerhead shifter |IMG||/IMG|

chage a Qudrajet M4MC toa Holley 4150

Posted: 4/2/04 4:33am Message 9 of 10
oldfart
Former Member
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SW Ranches, FL - USA
Joined: 4/1/2004
Posts: 8
Vette(s): 70 big block 4-speed covertible, 78 w/TPI conversion.
It's a 650. a hundred bucks. Never bolted it on. Converted my 78 to TPI instead.


Jesus saves!|B| |/B|

chage a Qudrajet M4MC toa Holley 4150

Posted: 4/2/04 8:17pm Message 10 of 10
ezobens
Former Member
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Grayslake, IL - USA
Joined: 3/15/2004
Posts: 33
Vette(s): 1969 C3 Coupe. Was an L-46 now a ZZ3 w/M-21 4-speed, manual steering and brakes, 3.70 Posi. Red with Balck interior, non-numbers matching.
If that 650 Holley is a 4175 (Vac Secondaries) and you still have it for sale, PLEASE let me know! I am looking for a 650 / 4175 for my 69' Coupe with a ZZ3 Crate Motor.
I bought the car with a 750 Holley Straight Bore Double Pumper and it's just WAY TOO much carb for even the ZZ3 (it's still only 350 cubes!). I think the 650 would be perfect for a daily driver using stock exhaust etc.
Let me know if it's manual or electric choke as well-
Thanks!
Elm.


in Forum: C3 Fuel, Emission Control, and Exhaust Systems


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