Aloha All:
I am almost at the end of my journey. The new motor is installed, the suspension has been rebuilt, I attempted to fire the motor today, but I was unsuccesful. NO JOY! I replaced the Qad-jet from my 80 with a Holly with 600cfm. Is there a different set up for the old wiring from the carburetor? I have verified the firing order and I have established spark. I am getting gas. I was hoping to here her rip today. Any help would be greatly appreciated. :confused:


[Modified by peparker, 7:07 AM 2/21/2004]


[Modified by peparker, 7:08 AM 2/21/2004]

 

Got your timing set to around 6-8*?

It won't start if the timing's too far advanced.

Also, don't know what wiring you're referring to on the carb. Got an electric choke? Probably only needs 12V.

-Steve

 

The old quad-jet had several electrical wire connectors, the Holly does not have any electrical connections. I am not sure if I need to jump any of the connectors so that the computer knows it has a carb.

 

Unless your 1980 has the LG4 (305cid) engine it should not have a Computer Command Control (CCC) system controlling the carb. That only leaves an electric choke for those wires to connect to. What type of choke does the Holley have?

 

I had the LG4 California model. I removed the 305 and installed a 350. Will I need to do something with the computer?I believe the holly chock is manual.


[Modified by peparker, 6:20 PM 2/21/2004]

 

I suspect you do not have a choke at the moment. It can be regulated by heat (a stove pipe in the intake), electric or manual (requiring a wire/handle control from the cockpit). I don't know if default in the absence of a connecting mechanism is full open or full shut. I suspect the latter. Try starting with the primary butterflies held fully open with a screwdriver (and a fire extinguisher at hand in case of backfire). Can you post a pic? Here is a Holley 4160.



I am out of the league when it comes to the CCC system. But here is what the Electronic Control Module (ECM) monitors:
-the Manifold Absolute Pressure (MAP) sensor
-the oxygen sensor
-the Vehicle Speed Sensor (VSS)
-the Throttle Position Sensor (TPS), and
-the Electronic Spark Timing Sensor (EST).

Perhaps others can advise as to how you can defeat these devices and make the Holley work.

 

I will try and hold the butterflies open. I am sure that you are right and I do not have a choke hooked up. I am sure that it is a manual one though. I need to get the choke cable and install it in the cockpit. I am not able to post a picture today, (no digital camera).

 

When the engine warms up something has to pull that primary butterfly to a fully open position. It is normally a thermo-coil spring. If you have no control mechanism for the choke, the motor will flood out and foul the plugs, etc.



*Edit*-Just an afterthought. And I do not wish to seem insulting. Have you installed a Holley squarebore on a GM spreadbore intake?


[Modified by paul67, 2:29 PM 2/21/2004]

 

Here is a short discribtion of my project: 350 Chevy with 400 hp. block is a 1-piece seal 4-bolt main block with a fuel pump provision to run stock type mechanical pump its bored .030 and honed with TQ plates, has .030 Federal Mogul (trw) forged pistons part# L2256 and the valve pockets are cut where they are supposed to be to make them bigger for larger valves. Rods are X series GM rods that have been cleaned, magnafluxed, and given an extra shot peening, crank is a cast 1-piece seal version cut .010/.010, all was balanced. Rings- Speed Pro file fit plasma's, bearings are King HP series, Camshaft is custom from Bullet cams and is as follows: HYD. ROLLER. intake is .481 lift 224 @ .050 276 deg adv.-- ehx is .490 lift 232 @.050 284 adv. duration . l/s is 110.....heads are GM vortecs with 1.94 int and 1.60 exh.3 angle Vj and surfaced. guides cut for large lift cams and NEW 110lbs springs were added. New head bolts were used. Lifters are GM units that are modified with different springs to make them run better at higher RPMs but still operate quietly for the street. Oil pan is GM from an lt-1 motor and has windage tray and studs installed. 8" balancer will be installed. INTAKE MANIFOLD is a PERFORMER RPM, powder coated silver.
Oh; not to worry. I do not know enough about this project and my Corvette to know if I am being insulted :lol:

 

You obviously are more engine savvy than me.

 

I dought it. I bought the engine this way. Don't have the time to do the complete engine package. Just trying to do the installation is killing me. :chevy

 

Let us know how you make out. In that warm climate you are probably flooded out from a default/closed choke.

 

HURRAY IT'S ALIVE!!!
Got it fired up today!!
It was the timing. I do not need the additional sensor wires. I will wrapthem up and attach them to the fire wall. Should be on the road soon. I will send photos when complete.
Aloha All and thanks for all the help111 :hurray: :seeya

 

I am going to need a choke. I was unable to see in your photo how your choke was installed. Is it a manual choke? Any recommendations. I am useing the Holly 4160 with vacuum secondary. Thanks again.

 

Glad you got things sorted out. And sorry for the mis-diagnosis. These things are difficult to analyze from afar.

My original pic showed a Holley 4160/3810 on a GM #3890490 intake used in 1966-67. That's the stock setup. Here is a ...490 intake sitting in my basement. The choke is basically just a coiled, heat sensitive spring sitting in that pocket in the middle of the pic. The spring tightens and loosens with temperature levels. The small rod you see in the first pic connects the spring to the carb primary butterfly.

With a Holley on a Performer intake (model?) I would say the most simple and inexpensive option is to get a Holley electric choke. The wiring is already there and the type of intake makes no matter. A local speedshop can order one for you or junkyards are filled with Holley-equipped cars. Or do a search on EBay for Holley 4160 and you will find many junk carbs with probably functioning electric chokes for $20-25. Or I wouldn't be surprised if a Forum member has one sitting in the corner of his/her garage. Have fun!

 

CCC = L83 CFI, the LG4 and L81 have the CCCC computer controlled catalytic convertor

 

you should have a nice street combo there :thumbs: post some pics for
us underprivleged :lolg: