Topic: Brakes.. It just doesn't end.
in Forum: C3 Engines, Driveline and Handling
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Gold MemberClifton, NJ - USA
Joined: 10/3/2003
Posts: 129
Vette(s): 1972 Coupe
Ontario Orange
Black leather interior
LS-5; Turbo 400
I have already posted to forum boredom, I fear, about my struggles to get what I beleive are acceptable brakes. One side effect of changing out the power brake booster( and thus eliminating the big vac. leak) is now I can get the engine to idle down to around 1000 RPM in Park,& approx. 700-800 RPM in drive. In drive the car sounds like it has a high overlap duration cam in it( real rough stumbly idle), and the manifold vac. is approx 12-15 inches.
Could this be my problem? Insufficient Vac at idle?
NJ BB Ken
Could this be my problem? Insufficient Vac at idle?
NJ BB Ken
1972 T Top 454; "Boomer" Latest "upgrades": 1 1/8" front Stabilizer bar. Rebuilt SS calipers with O-ring pistons. Under car Chambered exhaust. Fiberglass rear spring (360lbs/in). Bilstein Rear Shocks. 3/4" Rear Stabilizer Bar. Tow hitch. Performer manifold with 600 cfm Holley. Comp Cam 262 .499 lift. L-88 Hood in process
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Ken - I am sure that someone with more knowledge then me will give you the right answer, but I have heard that cam timing is critical for correct vacuum.
I think that a mech has to "degree" a cam, to get all running correctly.
I just went to a search engine, typed in "camshaft timing", and also added the word "vacuum", to the end of that on the second search, and there is loads of info on your cam situation.
Boatman
Hobe Sound, FL (82 today)
I think that a mech has to "degree" a cam, to get all running correctly.
I just went to a search engine, typed in "camshaft timing", and also added the word "vacuum", to the end of that on the second search, and there is loads of info on your cam situation.
Boatman
Hobe Sound, FL (82 today)
Gold MemberClifton, NJ - USA
Joined: 10/3/2003
Posts: 129
Vette(s): 1972 Coupe
Ontario Orange
Black leather interior
LS-5; Turbo 400
Boatman..
Happy Healthy Birthday!
Happy Healthy Birthday!
1972 T Top 454; "Boomer" Latest "upgrades": 1 1/8" front Stabilizer bar. Rebuilt SS calipers with O-ring pistons. Under car Chambered exhaust. Fiberglass rear spring (360lbs/in). Bilstein Rear Shocks. 3/4" Rear Stabilizer Bar. Tow hitch. Performer manifold with 600 cfm Holley. Comp Cam 262 .499 lift. L-88 Hood in process
Lifetime MemberHot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
well the first thing I would do is isolate the problem
you should have a set of vacuum plugs.. if not goto autozone and get one...
then block EVERY vacuum port on the carb and intake save one. connect your gauge there..
tell us what happens..
btw what kind of carb spefically?? 600 cfm holley is a bit too general
|UPDATED|10/12/2004 7:47:15 PM (AZT)|/UPDATED|
you should have a set of vacuum plugs.. if not goto autozone and get one...
then block EVERY vacuum port on the carb and intake save one. connect your gauge there..
tell us what happens..
btw what kind of carb spefically?? 600 cfm holley is a bit too general
|UPDATED|10/12/2004 7:47:15 PM (AZT)|/UPDATED|
in Forum: C3 Engines, Driveline and Handling
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