600 Holley cfm info???

[MY 85 GT]

I have an edelbrock 650 avs Thunder series...I think it just a little to much carb for my car right now until i do H/C/I ...So my friend gave me a 600 cfm vac secondary Holley carb its a 1406 model.. I looked up the carb specs it came off of 75-79 302's so im guessing it should be fine for my car...Ok the carb was on his 51 crown victoria custom...The carb would idle fine start up fine...but as soon as he would try to give it gas...it wouldnt take it....not stall, but wouldnt accelerate....What could that be ? What should i look for...Im not that good with holleys i used to be, but im an edelbrock person now...lol ..So any help would be great thanks....

 

[93 LX]

did you rebuild it?

 

[MY 85 GT]

did you rebuild it?

No not yet...It was on a running car...It would idle but not take gas thats what i was told....from what im gathering is it wouldnt accelerate...They botled on an edelbrock and the car ran so they were guessing the Holley was no good but what im wondering is why it wouldnt take gas and what should i look for that might cause that?

 

[stang&2Birds]

Check the accelerator pump.

After that, disconnect the vacuum secondaries. If that works, see what spring is installed for the vacuum secondaries. It may be too small/weak. People have a tendency to put in the weak spring, which is almost always asking for problems.

After that, check the power valve.

 

[MY 85 GT]

Check the accelerator pump.

After that, disconnect the vacuum secondaries. If that works, see what spring is installed for the vacuum secondaries. It may be too small/weak. People have a tendency to put in the weak spring, which is almost always asking for problems.

After that, check the power valve.

Thanks...stupid question its been yrs since i played around a holley carb i know the sec. spring is in that black cover behind the choke....The power valve i know is in the carb...The Accelerator pump is were again...?? Also you said to disconnect the Vac secondaires how do you do that?

 

[stang&2Birds]

There are no dumb questions, just people that think that they know way more than they really do.



To disconnect the secondaries, see figure 15:
http://www.holley.com/data/Products/Technical/199R7948-5.pdf

To adjust the Accelerator Pump, see:
Holley Accelerator Pump Adjustment - Stock Car Racing Magazine

http://www.automedia.com/Holley_Carburetor_Tuning/pht20000718hm/1

A few more good references that I quickly found with Google:
http://www.chevyhiperformance.com/techarticles/148_0503_carburetor_troubleshooting_tips/index.html

http://www.holley.com/0-1850C.asp

http://www.holley.com/TechService/FAQ.asp

Top 20 Carb Questions Answered - Car Craft Magazine

Carb Tuning Tips

http://classictrucks.automotive.com...ore-fuelish-thoughts/holley-power-valves.html

Carburetor Tuning the Scientific Way

http://books.google.com/books?id=oV...hl=en&sa=X&oi=book_result&resnum=15&ct=result



Ahh, I took my 1850's apart so many time om my 350 Cutlass, I could rebuild them in the dark. Really! It's not that hard once you get to know the carb.

 

[MY 85 GT]

There are no dumb questions, just people that think that they know way more than they really do.



To disconnect the secondaries, see figure 15:
http://www.holley.com/data/Products/Technical/199R7948-5.pdf

To adjust the Accelerator Pump, see:
Holley Accelerator Pump Adjustment - Stock Car Racing Magazine

Holley Carburetor - Adjusting the Accelerator Pump Circuit for Greater Performance

A few more good references that I quickly found with Google:
Carburetor Troubleshooting Tips - Tech Article - Chevy High Performance Magazine

Holley Performance Products 600 CFM Four Barrel Street Carburetor 0-1850C

Holley Performance Products Frequently Asked Questions

Top 20 Carb Questions Answered - Car Craft Magazine

Carb Tuning Tips

Carburetors - More Fuelish Thoughts - Holley Power Valves | Classic Trucks Magazine Article at Automotive.com

Carburetor Tuning the Scientific Way

How to Build & Power Tune Holley ... - Google Book Search



Ahh, I took my 1850's apart so many time om my 350 Cutlass, I could rebuild them in the dark. Really! It's not that hard once you get to know the carb.

Thank you so much for the info that going to help me alot....I will print this out and read up before re-building the carb...Thanks again....

 

[stang&2Birds]

No problem! I started working on cars well before the first electronic fuel injection system. A few years ago, I decided it was time to get rid of my carbs. The '77 Cutlass went to the great auto yard in the sky. I had over 20 carbs! :-O That's just for my Cutlass! I used to pick them up at swap meets for very little money. I had carbs for the track, for the winter, for the summer, for fuel economy (vacation trips), and so on.

Now, the only carb car I have is my '69 Firebird 350. And, that's staying with the stock carb.

Getting a spare carb or two at a swap meet, and tearing it apart is a great way to get into fixing cars. You learn a lot about organization stuff when you take things apart. You learn that you can not just torque things down as hard as you want. You learn the importance or torque sequences. And, so on. And, it's cheap, you don't need a lot of expensive tools, you can do it inside, and so on.

Also, you learn about tolerances and the how two "identical" things are not really "identical" because of real-life mechanical tolerances.

Yea, rebuild a carb - learn about life.

BTW: Check out the used books on carbs Amazon. Get a bunch, they're cheap and the info is just as relevent today as it was in the 70's.

Good Luck!