Checked the vacuum today and...
Thread Starter
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
Checked the vacuum today and...
I'm running 20lbs after the installation of the 1.6 rockers. Thats up from 16. It's that to much vacuum or do I need to adust the timing? Even reving it, it jumps back up to 20.
Pro
Joined: Aug 2000
Posts: 708
Likes: 21
From: Montrose CA
Re: Checked the vacuum today and... (Budman78)
I like hearing that you got 20 inches after the rocker arm change... That sounds quite normal. I wonder what the corolation is with the steeper angle rockers... longer valve opening? Deeper opening valve???
Are you in California?
Are you in California?
Pro
Joined: Aug 2000
Posts: 708
Likes: 21
From: Montrose CA
Re: Checked the vacuum today and... (Budman78)
And thats how a 1978 california car ends up with FI. Dealing with the smog ***** have me learning to luv' my carb.
Do you think the legislators will ever learn that FI make fewer pollutants than carbs do???
Do you think the legislators will ever learn that FI make fewer pollutants than carbs do???
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Re: Checked the vacuum today and... (Budman78)
The higher vacuum shouldn't be a problem unless it due to an over lean mixture, which I doubt would result from the rocker arm change. If anything, I'd expect a slightly lower vacuum reading from the 1.6's. Assuming no other changes were made, I suspect that the increase came as a result of the valve adjustment.
