The sound of the 1982 LU-5
10-01-2017, 04:32 PM
#1
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The sound of the 1982 LU-5
Got my original 42,000 mile LU-5 out today and went for a spin for the first time this year. After growing accustomed to the LG-4 and LB-9 over the bulk of the summer by comparison there is a very distinctive sound from the LU-5 motor. It sounds great lopes at idle very much like an old school muscle car- yet when it is go time you find out quick it only has 165HP under the hood.
Anyone do any camshaft research on these engines?.
Anyone do any camshaft research on these engines?.
Last edited by CPC Norwood; 10-01-2017 at 04:36 PM.
10-01-2017, 05:22 PM
#3
10-01-2017, 07:51 PM
#5
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Re: The sound of the 1982 LU-5
if it is a Vacuum leak it has had it since 1986 LOL. I like it. 
As a cruiser LU-5 is perhaps the most underappreciated of the early 305's.
As a cruiser LU-5 is perhaps the most underappreciated of the early 305's.
10-02-2017, 08:59 AM
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Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: The sound of the 1982 LU-5
My old 82 Pace Car LU5 had a double muffler setup on it and sounded great. I had issues with the CFI and being underwhelmed with the power I pulled it and dropped in a 350 with 882 heads and 276 cam IIRC along with a built TH350. Sure it was faster but the CFI setup was neat and today now I'm older and appreciate well kept stock cars I would leave it alone if I had another.
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10-02-2017, 09:37 AM
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10-02-2017, 09:47 AM
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Re: The sound of the 1982 LU-5
CFI has that distinctive whistle at low RPM,small throttle opening cruise also As I recall,LU5 does not use the L83,L69,85 LB9, ETC.cam-it used the same cam as the lower power '86 LB9.
As I recall,LU5 does not use the L83,L69,85 LB9, ETC.cam-it used the same cam as the lower power '86 LB9.
10-02-2017, 10:04 AM
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: The sound of the 1982 LU-5
1982 -'83 F-Body LU5: GM PN: 14088839 Hyd. Flat Tappet - Duration @ .050": 194/202 - Max Lift .383/.401 - 112 - Idle: 650 rpm
1982 -'86 F-Body LG4: GM PN: 14088841 Hyd. Flat Tappet - Duration @ .050": 178/194 - Max Lift .350/.385 - 108 - Idle: 650 rpm "Peanut Cam"
1983 -'86 F-Body L69: GM PN: 14088843 Hyd. Flat Tappet - Duration @ .050": 202/206 - Max Lift: .403/.415 - 115 - Idle: 650 rpm
As we can see, it is neither the LG4 "Peanut Cam" nor the L69 cam.
1982 -'86 F-Body LG4: GM PN: 14088841 Hyd. Flat Tappet - Duration @ .050": 178/194 - Max Lift .350/.385 - 108 - Idle: 650 rpm "Peanut Cam"
1983 -'86 F-Body L69: GM PN: 14088843 Hyd. Flat Tappet - Duration @ .050": 202/206 - Max Lift: .403/.415 - 115 - Idle: 650 rpm
As we can see, it is neither the LG4 "Peanut Cam" nor the L69 cam.
Last edited by chazman; 10-02-2017 at 10:24 AM.
10-02-2017, 01:34 PM
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Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: The sound of the 1982 LU-5
Bout as bad as the "peanut cam" I fought it and scratched my head over my CFI car for one whole month before yanking it and the TH200 and in with the 350/TH350 combo. The CFI setup did look cool though.
