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will cam change exhaust note?

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Old Feb 12, 2001 | 01:17 AM
  #1  
hookin88formula's Avatar
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From: michigan, usa
will cam change exhaust note?

just as the subject reads will it? what will it do for the sound? also i guess while i am here i have a 88 formula bird 350 tpi and what cam is a good cam for my car? all my mods are listed below. any help would be great thanks

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1988 firebird ws6 formula350tpi msd 6al box blaster 3 coil accel 8.8 race wires hooker shorty headers hooker cat back system pro shift light a pillar gauge pod and water temp and air/fuel ratio gauges autometer oil pressure gauge b&m mega console shifter, march underdrive pullies, tpis airfoil cvr high torque starter (love it)
best 1/4 mile run of 14.44@ 96.53
this run is before the new exhaust system
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Old Feb 12, 2001 | 01:30 AM
  #2  
BOWTIROC's Avatar
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From: Coulterville, IL...Currently on Beale AFB, CA
Without a doubt, as far as how much all depends on the cam.

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Black 89 IROC...Mods: 355, 10.5:1 comp, Big Solid Crower Cam, TFS heads, Victor Jr, Holley, and a 5 spd...
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Old Feb 12, 2001 | 04:15 PM
  #3  
88blkiroc's Avatar
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From: Orland Park, IL, USA
Car: 88 IROC-Z
Engine: L98
Transmission: TH350
Axle/Gears: 3.45
Yes it will change the sound. BUT, do not run a cam just to change the sound of your exhaust, run it to change the HP output of your engine. The lobe seperation angel will determine how lopey your idle is. the lower numerically you go with you LSA the more lopey the car will sound. Wouldnt go below a 110 LSA for a close to stock car.
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Old Feb 13, 2001 | 08:58 PM
  #4  
JoelOl75's Avatar
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From: PA
Car: 88 Firebird WS6
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.42
Don't go under 112 LSA for a TPI. Stock heads can go upto .480" lift unless you machine them.

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Old Feb 13, 2001 | 09:29 PM
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Dan87IROC-Z's Avatar
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From: Fort Collins, Colorado
You don't have to machine the heads to get more lift, you just need to replace the springs, the stock spring seats will accept just about any aftermarket cam's lift. I am currently in the process of installing the LT4 Hot Cam in my car. The total cost of the job and with all the parts was about $600. I had to buy new valve springs, valve seals, the cam, gaskets, a new timing chain and I also bought some replacement parts for my car that were in need (02 sensor, ect.). I'll post here this comming weekend when I should be done and report on how it performs.

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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

Current Mods: LT4 Hot Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, 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)

7.5" 10 Bolt with 3.42s soon to come!
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Old Feb 14, 2001 | 01:34 PM
  #6  
Kevin91Z's Avatar
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
<font face="Verdana, Arial" size="2">Originally posted by JoelOl75:
Don't go under 112 LSA for a TPI. Stock heads can go upto .480" lift unless you machine them.

</font>
My dad just checked on a set of 88 350 heads and the max lift is .460" before the retainer hit the seat.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
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Old Feb 14, 2001 | 08:35 PM
  #7  
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From: PA
Car: 88 Firebird WS6
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.42
<font face="Verdana, Arial" size="2">Originally posted by Dan87IROC-Z:
You don't have to machine the heads to get more lift, you just need to replace the springs, the stock spring seats will accept just about any aftermarket cam's lift</font>

See above post. The retainers hit the valve guides. I measured .480 on mine but his was lower yet so I guess you can put big springs in there and NOT machine the guides down and everything will work just fine. You can get lucky if you have pushed in studs (It just pulls 'em out) or really fu*k up your heads, rockers, pushrods, cam, lifters, ect.
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