: installing edelbrock 1114 on a 1979 425



Reverend Hearse
05-05-12, 11:19 AM
Nothing but headaches, first, the electrical switch that threads through the throttle arm will not go on, no matter how I try and position it , its higher than stock and the arm is shaped different.second, the vacuum line that goes above the brake booster port in the rear of the qjet is not present on the 1114 , where does it tie into??? I know people have gotten these to work on the 425 , but I never knew it would be such a nerve racking experience.....

cadillac_al
05-06-12, 10:10 AM
I'm not quite picturing it. You may need a spacer under the carb if there is interference with the linkage; that could cause interference with the hood though.. The other vacuum line should be able to splice into something else. I'll take a look at mine later today and see if I can add anything else.

Reverend Hearse
05-07-12, 10:36 AM
had to use a adapter on the carb , i used a t fitting in the line for the trans. it starts , but the idle is very high , and it has backfired a bit...

Reverend Hearse
05-08-12, 10:20 AM
i need toknow,which porton the carb does the transmission vacuum connect to? i currently have it on the pasenger side port and it seems a bit of on the shifts, otherwise its tuned and running fine

Reverend Hearse
05-10-12, 03:55 PM
At this rate,I could burn it and have more entertainment....I know someone here has done this before, why such a secret???

deVille33
05-12-12, 10:51 AM
Edelbrock has some attachments that u have to use for some applications in order to get stock applications to work. I have used these on Chebbies and Pontiacs, but have never done a Cadillac. Get a Edelbrock catalog or use their website and check the attachments for the application and manifold you are using.

Reverend Hearse
05-12-12, 01:09 PM
Its not the making it fit part, its the hooking it up part. I'm not sure what type of vacuum is required to shift the Trans,I believe its manifold vacuum to the Trans and the other port to vacuum advance.......

cadillac_al
05-13-12, 11:55 AM
The trans needs full time vacuum. The dist can use either full time or ported vacuum depending on the engine. I normally try to use the ported vacuum. Whenever I buy a car with an Edelbrock carb, I start looking for a Qjet to replace it.

Reverend Hearse
05-13-12, 12:21 PM
Went through 6 qjets before giving up...the last one supposedly rebuilt and tuned by a well known local speed shop... I moved the vacuum lines around and got all the kinks worked out with the exception of a slight off idle stumble, but some further tuning should solve that...

deVille33
05-14-12, 10:10 AM
Off idle stumble can be caused by things away from the Carb itself. Check all dashpots and if they can hold vacumm for the precribed amount of time. Check the advance canister at the distributor and the mechanical advance at the distributor. Check all vacuum lines, that they are not cracked, inside the the engine compartment and inside the passenger compartment. We are talking about a mile and a half of vacuum lines. Anything that robs the carb of vacuum at off idle can cause stumble.