What carb are you running?  If Holley, vacuum or mechanical secondaries?  Troubleshooting will vary by carb.  If it produces as much power as you indicate at 3/4 throttle, it more that likely is getting gas.  If you have a vacuum advance and have it plugged into the wrong port, you might lose some timing with low vacuum.  Don't start changing things as this does not sound like a jet issue - yet.  Check float levels and make sure needles and seats are functioning properly.  Is this a new carb or has it performed properly in the past?  If the carb is new, what else have you changed?

I'm not sure I understand where the bogging is.  Is it when you punch the accellerator or when you get to redline?  If the former, any number of things - carb, ignition come to mind - if the latter you may be getting valve float which will slow you down immediately while trying to wear out/break your valve train.

A few months back I finally installed a tach.  I had thought that I had a bog at high rpm's.  The tach showed around 5,000rpm, which is redline on stock valve springs.  I was floating the valves, but there were no noises that would make me think of that particular situation.

If it was a Holley I might be able to help.  I think on the old web site there were some fairly recent posts with Edelbrock setup configurations.  See if you can find it there but if not I'm sure someone can repost it.  How big is your motor and what pump setup, fuel lines, filters, etc., are you running.  If you start at the tank all the way to the carb and ensure that you don't have any limitations on what is feeding the carb, you can focus on the carb.  Not a bad idea to verify your PCV valve and carb flange gasket to ensure that air is not getting in where it's not supposed to.  Sometimes you can cover up these problems with idle mixture settings and won't see problems until you hit WOT.  If possible, you still ought to check float level(s) to make sure that you are getting full fuel metering in the carb.  The rest I will leave to the Edelbrock experts.  I just looked at the owner's manual that I found at Summitracing.com and it is pretty complete on the basics of tuning and troubleshooting.  Good luck!

John Ha wrote:

Unfortunately this POS message board can't link to this directly so just copy and paste the URL into your search window and the relevant post should come up.

Well, I stand corrected.  The link does not show up in preview but if I try to use the link button the POS fails to work.  Hate this stupid format.

rmousir wrote:

I haven't changed anything and it has performed like this for as long as I remember.  I'm finally ready to deal with it. 

The carb is a Edlebrock 1405 manual choke.  When I got the carb I followed Edlebrock's instructions to tune it and other than WOT I've not had any problems with the carb except for the occassional hick up, like a miss will happen.  I figure WOT and a miss now and then isn't too bad.

So now I'm ready to deal with the WOT issue and resolve it if I can.

My dist does have a vacuum line which does run to the carb per Edlebrocks directions.

Thanks.

You need to get the Edelbrock kit (p/n 1464) to change out your step up springs. Make sure you have the proper idle mixture set (see page 6) then replace your step up springs per the chart and instructions on page 6 and 8.

Here is the link for the Edelbrock manual  -  http://www.edelbrock.com/automotive_new/mc/carbs_acc/pdf/carb_owners_manual.pdf