heres the setup ( on the 91' ) LOOK IN SIG.

I had to drill and tap provisions for the power brake line into the intake. Worked fine. MY carb doesn't have a power brake port, I do have a PCV however.

What can I do if I get a new intake and I don't want to drill it??? Can I just discard the metal line and run rubber hose to the carb??? Can I do without the PCV?? I get mixed replies on the necessity of the PCV.

 

If you get a new carb that has the port for the brakes (Edelbrock or Carter) then you're fine using rubber. I'd keep the check valve to.

You don't need a PCV valve. You can use a breather instead. The valve is also a check valve that stays closed when the engine's off or what not. The breather does the same thing, it just doesn't have the check valve therefore it pollutes the environment by releasing crankcase pressure into the atmosphere instead of recirculating it back into the combustion chambers like the stock set up does. But it still releases the pressure.

 

C'mon now, why on earth would i want to BUY a Carter or Edelbrock to replace my DEMON???

I want to know if there is a way to no drill the intake. I.E. hook the brake line to the carb or if the outlet for PCV will work.

PCV port doesn't produce vacuum does it???

I'm getting a GM intake an i don't want to drill it, i think it may have provisiond for the brake line though, but if it doesn't. I need suggestions.

 

Yes, there's vacuum at the PCV port.

 

Hey 330, not to come off like an azz, just askin, if you'd mind shortenin that sig, it's a bit long with all the text.

thanks man...

 

But enough to boost the master cylinder? I wouldn't think so, but there's one way to find out.

Hey......... You asked didn't you?

 

Why not? It all comes from pretty much the same place.

 

I have the power brake line "T" in the PCV valve line and the brakes work fine. Its one of the few problems I don't have.

 

The newer holley carbs have vaccum ports for just about everything. Im running mine to the PVC port because it was in a more convenient spot than the power brake booster port. It works fine.

Im not using that valve...if it just helps keep my car from polluting the environment then its just to late....I think my car alone is putting a hole in the o-zone layer above Bville, WV

 

If you were that worried about it, you could use a 1/2" carb spacer and drill and tap a 1/4 NPT hole in the back and screw in a 3/8" hose barb.

 

tahnks for the great Idea, I'm already using a spacer on the carb.... I'll just drill it.

 

You just run a "T" with one hose to the PCV and one to your power brakes?? No problems???

Does anyone else do this or think that it's harmless?? I would think that the air being sucked by the brakes would interfere with the PCV and then the brakes would suck oily air/ blow-by gasses.

 

The brakes wouldn't suck oil and crankcase vapours, the brake booster is a suckee, not a sucker.

I've heard connecting the PCV and brakes to the same port on the carb isn't the best idea because a failure in the PCV system can rob the brake booster of vacuum

 

Connecting the PCV to the brakes was just a trial thing, but it seems to work well for me anyway. I guess I'll just replace my PCV valve often. Thanks for the info, I never considered what would happen if the PCV system failed.