How much vacuum do you have with ZZ4 cam?
06-28-2002, 09:56 AM
#1
Member
Thread Starter
Join Date: Jan 2001
Location: Ft. Worth, TX
Posts: 436
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Turbo Trans Am and lots of non-3rd gens
Engine: 231 SFI Turbo's, LT4, LT1
Transmission: 2004r, 4L60E
How much vacuum do you have with ZZ4 cam?
I'm wondering if my vacuum is up to par with others running a ZZ4/ZZ3 cam?
I'm getting a steady 14 inches at 700 rpm idle, is that about right with this cam?
I'm getting a steady 14 inches at 700 rpm idle, is that about right with this cam?
06-28-2002, 09:22 PM
#3
Supreme Member
Join Date: Jul 1999
Location: Alberta, Canada
Posts: 1,454
Likes: 0
Received 57 Likes
on
31 Posts
Car: 1989 Camaro-1LE
Engine: TPI(s)
Transmission: 5 speed (MM5, MK6)
Axle/Gears: 3.45, 3.73
I got 14-ish ... right now I got a darn vacuum leak so the gauge wiggles between 13.5 and 14.25 (or there abouts). I think I have had my TPI apart too many times ... need new gaskets.
In diag mode (1000 RPM), it is solid at 16 or 17.
Mark.
In diag mode (1000 RPM), it is solid at 16 or 17.
Mark.
07-02-2002, 09:17 PM
#5
Member
Thread Starter
Join Date: Jan 2001
Location: Ft. Worth, TX
Posts: 436
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Turbo Trans Am and lots of non-3rd gens
Engine: 231 SFI Turbo's, LT4, LT1
Transmission: 2004r, 4L60E
Well, I can't find any vacuum leaks of any kind, used all new gaskets the last time it was apart, the only vac line I have thats hooked up that is not ported is the PVC on the driver side, the others are either ported or capped off.
It runs darn good now that I started burning chips for it, maybe I'll experiment with the spark adv at idle as I do have a funny/odd popping sound at the tailpipe when listening thru a stethescope thats unlike any other of my cars.
It runs darn good now that I started burning chips for it, maybe I'll experiment with the spark adv at idle as I do have a funny/odd popping sound at the tailpipe when listening thru a stethescope thats unlike any other of my cars.
Thread
Thread Starter
Forum
Replies
Last Post
86CamaroDan
Engine/Drivetrain/Suspension Parts for Sale
2
09-29-2015 10:08 PM
