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02-20-2004, 04:18 AM
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Club Cobra Member
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Join Date: Nov 1999
Location: Salem,,
NJ
Cobra Make, Engine: ERA 289 FIA #2100 Rio Red Wimbledon White Stripes 302 stroked to 331 Webers Richmond Road Race 5 speed
Posts: 779
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Not Ranked
PCV valve with Webers?
Can you hook up a pcv valve with weber carbs?
I have a pair of cast aluminum valve covers I'm going to polish and plan on running webers. One side has a hole for a breather tube and the other has a hole for a pcv grommet. If a pcv valve can't be used with a weber set up, then I'll bore out hole for the pcv grommet and add another breather tube.
__________________
 Snakebit
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Advertising
02-20-2004, 08:37 AM
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CC Member
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Join Date: May 2003
Location: Newburgh, IN,
IN
Cobra Make, Engine: 427SC Unique
Posts: 481
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Not Ranked
I run a K&N breather on each valvecover and a old style breather tube on the rear of my intake. It has worked well for me.
Pics in my gallery
Brent
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02-20-2004, 04:38 PM
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CC Member
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Join Date: Mar 2002
Location: so cal,
Cal
Cobra Make, Engine: I used to fix them for a living
Posts: 2,563
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Not Ranked
You can, but it will be a pain.
Drill and tap each and every intake runner. Connect all of these to a common plenum with 1/4" (or so) stainless hardline, connect that to PCV valve. Some people will mistake the hardlines to each runner for nitrous.
I would just run a breather on both sides.
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In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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02-20-2004, 08:48 PM
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CC Member
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Join Date: May 2002
Location: San Francisco CA,
Posts: 525
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Not Ranked
Fixit, you mean like this?
been there, done that, got the tee shirt. 
It really wasn't that bad, but I'm pretty used to bending tubing!
--Mike
__________________
They bend 'em, we mend 'em.
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02-21-2004, 05:41 AM
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CC Member
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Join Date: Dec 2003
Location: Gurnee,
IL
Cobra Make, Engine: Kirkham #259
Posts: 1,394
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Not Ranked
Mike
Sure do like how you did the plumbing ..... very nice Craftmanship
But why compression fittings and not SS Earls tube and nut???
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Morris
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02-21-2004, 11:52 AM
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CC Member
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Join Date: May 2002
Location: San Francisco CA,
Posts: 525
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Not Ranked
Because the entire system is hidden under the intake manifold and not seen. The compression fittings are much easier and faster to work with because no flaring is necessary.
If it was on top of the intake, it would be all pretty stainless line and nickel plated tube and nut.
--Mike
Quote:
Originally posted by Morris
Mike
Sure do like how you did the plumbing ..... very nice Craftmanship
But why compression fittings and not SS Earls tube and nut???
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__________________
They bend 'em, we mend 'em.
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02-21-2004, 04:13 PM
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Club Cobra Member
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Join Date: Nov 1999
Location: Salem,,
NJ
Cobra Make, Engine: ERA 289 FIA #2100 Rio Red Wimbledon White Stripes 302 stroked to 331 Webers Richmond Road Race 5 speed
Posts: 779
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Not Ranked
Beautiful work! Thanks for the post. Who did you get the webbers from?
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Snakebit
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02-21-2004, 09:02 PM
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CC Member
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Join Date: May 2002
Location: San Francisco CA,
Posts: 525
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Not Ranked
The manifold is Blue Thunder and the delivery system is TWM electronic fuel injection.
--Mike
__________________
They bend 'em, we mend 'em.
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02-22-2004, 11:39 AM
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CC Member
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Join Date: Mar 2003
Location: PVE,
CA
Cobra Make, Engine: ERA 289 FIA #2027, 65' 289" PS wheels
Posts: 345
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Not Ranked
off the thread, but, heat soak?
FD,
This is off the thread of the PCV, but woh does the system handle heat?
(Very nice workmanship.)
Is there any problem with vapor lock on a hot day?
I do not know how high the boiling point is raised with 30 to 40 lbs of fuel pressure, but it seems like there would be a problem restarting on a hot day, hot engine.
Pete
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ERA 289 #2027
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02-24-2004, 10:18 AM
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CC Member
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Join Date: May 2002
Location: San Francisco CA,
Posts: 525
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Not Ranked
Re: off the thread, but, heat soak?
Quote:
Originally posted by Pete Munroe
FD,
This is off the thread of the PCV, but woh does the system handle heat?
(Very nice workmanship.)
Is there any problem with vapor lock on a hot day?
I do not know how high the boiling point is raised with 30 to 40 lbs of fuel pressure, but it seems like there would be a problem restarting on a hot day, hot engine.
Pete
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Hi Pete,
The lines under the intake are vacuum only, no fuel runs through them. EFI uses 42 psi and had a return line system so that the fuel is never on the engine long enough to get too hot.
HTH,
Mike
__________________
They bend 'em, we mend 'em.
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