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What year did the 115mph speedo come out in IROC's

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Old Feb 20, 2001 | 10:57 AM
  #1  
86IROCMIKE's Avatar
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From: USA:)
What year did the 115mph speedo come out in IROC's

My 86 has them,but heard they are not made until 87??

------------------
86 IROC,canary yellow(originally black),fully loaded.305TPI WITH 700R4/SHIFT KIT,3:73 POSI REAR,4 WHEEL DISC BRAKES,T-TOPS,POWER LOCKS,POWER WINDOWS,TILT,CRUISE,SADDLE INTERIOR,POWER ANTENNAE,SPOILER OFF 87 IROC SO NO THIRD BRAKE LIGHT ON ROOF,16" BY 8" RIMS OFF 89 IROC,3"INCH EXHAUST WITH A 2 CHAMBER FLOWMASTER AND 3 1/2" BY 18" LONG CHROME TIPS,20% TINT ON SIDES,HATCH AND T-TOPS,GTS TAILLIGHT COVERS,AFTERMARKET FOG LIGHTS,PIONEER 180 WATT CD RECIEVER AND DETACHABLE FACEPLATE,WITH JENSON SPEAKERS ALL AROUND,TALKING RADAR DETECTOR"BACON ALERT"

....Long live the EIGHTIES!!!and my love for the IROCZ
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Old Feb 20, 2001 | 01:30 PM
  #2  
Willie's Avatar
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From: Tucson, Arizona USA
Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
Your speedo has been replaced. Here's a breakdown, year by year:

1982 - 1984 Dual pointer 85-mph on all Camaros.
1985 Single pointer 85-mph on all Camaros.
1986 85-mph on all Camaros except late year Z28's with TPI (145-mph).
1987 85-mph on Sport Coupes, RS's and Z28's (with and without the IROC-Z option) with the LG4 305 (carb). 145-mph on Z28's (and IROC-Z's) with TPI (305 & 350).
1988 - 1989 115-mph on Sport Coupes, RS's and IROC-Z's with the L03 305 (TBI). 145-mph on IROC-Z's with TPI (305 & 350).


------------------
Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Paxton (6-psig): 12.57 @ 111 mph.
Paxton (6-psig) & 50-hp nitrous: 12.04 @ 114 mph.
ATI D1SC (10-psig): ?

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.
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Old Feb 20, 2001 | 03:43 PM
  #3  
MikeS's Avatar
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From: New Orleans
Hey Willie,
would you happen to know which speedos were cable driven and which ones were electric?
Thanks
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Old Feb 20, 2001 | 05:52 PM
  #4  
david foraker's Avatar
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hmmm, thats funny cause my 88 has a 115 mph speed and the rpo says LB9. but my iroc also has QY2 the rpo for 15 wheels. i have been told no LB9 tpi iroc in 88 came with 15in wheel, thats strange. hmm its also metallic grey. rare care maybe?
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Old Feb 20, 2001 | 07:30 PM
  #5  
88IrocConvertible's Avatar
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From: Nuremberg, Germany / US ARMY
<font face="Verdana, Arial" size="2">Originally posted by david foraker:
hmmm, thats funny cause my 88 has a 115 mph speed and the rpo says LB9</font>
as far as the speedo goes, mine has a 115 too, its a 88 iroc convertible with the LB9 TPI.... its definitly stock, but how is that possible ??
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Old Feb 21, 2001 | 11:59 AM
  #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 MikeS:
Hey Willie,
would you happen to know which speedos were cable driven and which ones were electric?
Thanks
</font>
All 82-89 Camaros are cable driven speedos, the same with 82-86 Firebirds. 90-92 Camaros and 87-92 Firebirds have electronic speedos.

Most of the 305 automatic cars will have the lower speedo. The 350's and 305 5-speeds usually get the 145 MPH speedo.

------------------
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
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

[This message has been edited by Kevin91Z (edited February 21, 2001).]
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Old Feb 21, 2001 | 07:30 PM
  #7  
avro206's Avatar
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From: Calgary
Car: 89 Formula
Engine: 350
Transmission: TH 700R4
Axle/Gears: 3.27
My theory, I think all the IROCs
that came with 15" wheels had the 115mph speedo. When the 16" wheels were specified, then the 145mph speedo came along with it.

Yes Dave, I think your car is rare.

According the the Camaro white book the 115mph speedo dbuted in 88.

------------------
Dare to be different-
build a 305! <gasp!>

[This message has been edited by 871LEIroc (edited February 21, 2001).]
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Old Feb 22, 2001 | 09:19 PM
  #8  
SlowCamaro88SC's Avatar
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in '88 the 15" Z/28 styled aluminum wheels were standard on the sport coupe and the IROC-Z. the 16" (restyled) aluminum wheels were optional on the IROC-Z and my '88 sport coupe had the 115 mph speedo. but Then I put one out of a '86 iroc (w/ the 145 mph speedo) in my car.

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  • 1988 Camaro Sport Coupe
  • 2.8 V6
  • TCI 3200 Stall TC
  • B&M Transkit
  • 2.5" 80 Series Flowmaster & Catback
  • No Kitty
  • '83 Z/28 Hood
  • '87 IROC Wheels
  • '92 Z/28 Bowtie Grille
  • IROC Gauges
  • IROC Taillights
  • IROC Foglamps
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