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ChevLoRay · 07-08-2004, 03:51 PM

Someone correct me if I am wrong, but PCV hose and the hose to the brake booster should both be manifold vacuum. The higher vacuum volume is what you need to properly operate those systems. The ported vacuum is for the distributor advance and the modulator on the transmission, and is lower volume.

When I installed an Edelbrock Performer intake, I couldn't use the Tee that was on the old intake. I went through some adapters and got the vacuum to the booster, and to the modulator. The Q-Jet (Edelbrock 1901) had ports for the timed vacuum that the distributor needs. Everything works well.

07-08-2004, 03:51 PM	#8
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Someone correct me if I am wrong, but PCV hose and the hose to the brake booster should both be manifold vacuum. The higher vacuum volume is what you need to properly operate those systems. The ported vacuum is for the distributor advance and the modulator on the transmission, and is lower volume. When I installed an Edelbrock Performer intake, I couldn't use the Tee that was on the old intake. I went through some adapters and got the vacuum to the booster, and to the modulator. The Q-Jet (Edelbrock 1901) had ports for the timed vacuum that the distributor needs. Everything works well. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.