Hi yes a stupid question I bet and I am a novice. I just want to know what I should be hearing. What do they sound like and do the affect the performance. Please enlighten me. Thanks

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1988 IROC-Z T-Top "MATTSTOY"
350 Crate engine
370ft. lb Torque STOCK
5speed Centerforce clutch, Spohn Sub-frames, Jamex 1.5 Lowering springs, 2 1/2' Exhaust,ram air setup

 

most people refer to it as the valves rattling.

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

Sounds like Something Hitting your Fan.

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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver 14.82 @ 91.1
Reader's ride -> My Ride

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

if your knock sensor detects pinging it will retard timing , affecting performance.

 

it sounds like a woodpecker in your motor, just not as hollow....you'll hear it best w/ the radio off, the windows up, and no air/heat on....it's a nasty sounds and you'll know it if you hear it.

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85 Z28- 350, Comp 262, Edelbrock Performer intake, Edelbrock 600 cfm carb and Edelbrock cat back, Summit headers and vette servo
-JVC, Eclipse, Pioneer, MTX, Phoenix Gold, Planet Audio

 

I had an RS with a 406 and TBI trying to get that thing to feed the motor was fun. It dentonated so hard one time it sounded like someone was beating the piston top with a hammer. Its not a pretty sound...

Make sure your exhuast is leak free around the motor. Some times a leak can sound like pinging.



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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!

 

Put a screw driver in a tin coffe can and shake it around, thats what detonation sounds like.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Catco High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base