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| PCV Hose Routing Question w/ old 390 Holley https://slantsix.org/forum/viewtopic.php?t=16227 |
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| Author: | imnoisydart [ Fri Feb 17, 2006 5:47 pm ] |
| Post subject: | PCV Hose Routing Question w/ old 390 Holley |
I have a 1963 Holley 390 (from a Rambler) that I want to run on my slant (which has Clifford Headers). It does not have the PCV inlet at the bottom because it was pre-smog. I know I could run a spacer plate with an inlet, but I'm trying to keep the height low. I've been told I could run the PCV into the manifold (Idon't have it sitting in front of me, but it seems like it's located over #5 runner.) How will this (the dirty mixture) affect the incoming air/fuel mixture?" Also, I am planning on spraying it occasionally w/ a 100 shot of nitrous in bracket racing. |
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| Author: | CStryker [ Fri Feb 17, 2006 6:14 pm ] |
| Post subject: | |
You didn't say what manifold you're running, but I would hesisatate to use a vaccuum tap that's in a runner because that cylinder would end up leaner. Add some nitrous and you could melt a piston w/o too much problem. |
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| Author: | imnoisydart [ Fri Feb 17, 2006 6:59 pm ] |
| Post subject: | |
Thanks CStryke- that's what I was afraid of. Running a modified stock maniflold to accomodate a 4 bl. |
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| Author: | SlantSixDan [ Fri Feb 17, 2006 7:11 pm ] |
| Post subject: | |
Yep, the tap on runner 6 is OK for low-volume vacuum (operating heater controls, etc.) but high volume constant flow from PCV will cause #6 to run lean. Drill and tap the plenum at the outboard (driver's side) end of the manifold to accept a fitting with pipe thread on one end and a 3/8" hose nipple on the other. |
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| Author: | mrhite65 [ Fri Feb 17, 2006 8:24 pm ] |
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| Author: | CStryker [ Fri Feb 17, 2006 10:10 pm ] |
| Post subject: | |
If you're mani has EGR provisions, you can also make a block-off plate, and then drill a hole that lines up w/ the vacuum side, then tap it for a hose barb. |
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| Author: | imnoisydart [ Sat Feb 18, 2006 6:56 pm ] |
| Post subject: | |
I got an EGR plate at the junkyard today. I will flip it around, and tap a hole for a 1/8" NPT fitting, then put in a 1/8" NPT to 3/8 hose brass adapter. That should work, right? |
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| Author: | CStryker [ Sun Feb 19, 2006 10:10 am ] |
| Post subject: | |
Yeah... never thought about modifying an actual EGR valve plate for that though... good idea. |
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