Have installed a Promax on my center carburetor

[Chryco Psycho]

if the power valve is more than 1 " it is staying open therefore the idle screws will not affect the mix as fuel is getting in past the power valve

 

[fasjac]

Have you or can you post a pic of the motor? If you already have, I didn’t see it. And what’s the cam card read

 

[Morgan]

if the power valve is more than 1 " it is staying open therefore the idle screws will not affect the mix as fuel is getting in past the power valve

Unfortunately I can't find a power valve of 1 ". Should I try with a plugged?

 

[Morgan]

Have you or can you post a pic of the motor? If you already have, I didn’t see it. And what’s the cam card read

252 / 258 vid .050 .576.576 lyft 110 lobe.

Kind Regards

 

[Morgan]

Stretched to 512, balanced, 9.5 in compression Pertronix Digital HP ignition box

 

[fasjac]

Looks great. Can’t imagine the low vacuum number with the cam designs for the last 10 years. I’m running a 500 stroker, six pack. The carbs out of the box are dang good. Center carb came with 62’s and 65 PV. I’m getting 12-13” vac with a comp cam ( I know they are not real popular) but, for my cruising and occasional WOT works great. You sure there’s not a vac leak? And you’re probably at 34-36 total timing. I have promax baseplate on the rear carb just for easy adj if needed. I’ll share my cam info if you’re interested. Good luck to you

 

[Chryco Psycho]

you can order online to get a 1" PV or yes you can plug the PV & increase jetting by 8 sizes to compensate , I prefer to use the power valve so it is not overfuelling all the time with the larger jet size .
I used a custom cam with similar specs , it worked very well but had more vacuum typically

 

[Morgan]

Hello,
Have now removed "Promax" and mounted your original. has 66 in nozzle and power valve 2.5 has AFR value of 12.8-13.2 at 1000 rpm. The ignition is 17 degrees, full range 36 degrees
I will be driving for a while so I will see what I do. Thanks for the help so far. Sincerely, Morgan

 

[Chryco Psycho]

is there a difference in the vacuum reading ?

 

[Morgan]

Got better now I have 8 psi in vavuum, so I have some leaks on the Promaxen

 

[70sixpkrt]

Any update?

 

[Morgan]

[QUOTE = "70sixpkrt, post: 123548, medlem: 612"] Någon uppdatering? [/ QUOTE]
Hej,
Har haft lite annat att göra så jag har inte kört någonting. Kommer tillbaka när jag har gjort det.
VÄNLIGA HÄLSNINGAR
Morgan

 

[Chryco Psycho]

Uhuh

 

[Morgan]

Yes Swedish sorry uses Google translate

Have had little else to do so I haven't run anything. Will be back when I do.
Sincerely Morgan