Estimated Performance of my Car...
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Joined: Mar 2004
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From: Pittsburgh & Allentown PA
Car: 1992 Z28 (Heritage Edition)
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 2.73 Posi
Estimated Performance of my Car...
My car is a pretty much bone stock 1992 Heritage Z28 w/ 29,.xxx miles Its a LB9/Auto with 2.73 posi in the back. Since most of the times you find online for 3rd gens are either 305/5 speeds or 350's i was just trying to get some estimates as far as times.
I personally estimated about 7.5 sec. 0-60 and about a 15.2-4 1/4 mile. I'm not really into racing my car, so i doubt ill ever drag race it so i was just looking for your guys estimates. Keep in mind that its been proven that 91-92 Lb9's got the good cam so they DID have more HP than the 195 that they were rated at (even though nobodies sure how much more because it still has the tiny manifolds). I would guess its got about 205ish BHP in stock form.
I also will be definately adding a catback to it in the spring, and maybe after that i will do a full exhaust..but thats pretty much it. This is the kinda car that you wanna keep pretty much stock because of what it is...
I personally estimated about 7.5 sec. 0-60 and about a 15.2-4 1/4 mile. I'm not really into racing my car, so i doubt ill ever drag race it so i was just looking for your guys estimates. Keep in mind that its been proven that 91-92 Lb9's got the good cam so they DID have more HP than the 195 that they were rated at (even though nobodies sure how much more because it still has the tiny manifolds). I would guess its got about 205ish BHP in stock form.
I also will be definately adding a catback to it in the spring, and maybe after that i will do a full exhaust..but thats pretty much it. This is the kinda car that you wanna keep pretty much stock because of what it is...
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Joined: Oct 2003
Posts: 192
Likes: 0
From: Novi. MI
Car: 87 Camaro LS
Engine: LG4
Transmission: T-5 World Class
Axle/Gears: 3.08 Open baby!!
Come on
My Camaro only has 33,000 on it and its older.
I still have fun with it....
thats what they were built for
As for the times..you are about right...
My Camaro only has 33,000 on it and its older.
I still have fun with it....
thats what they were built for
As for the times..you are about right...
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Joined: Jun 2003
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From: Toronto CANADA - GM Parts Rep.
Car: 1987 Iroc Z28
Engine: The KING of the 3rd gen TPI's.
Transmission: Beefed up T5
Axle/Gears: Aussie 3.45's
Upper 15 quarter.
That auto and highway gears are killing you.
That auto and highway gears are killing you.
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Supreme Member
Joined: Jan 2003
Posts: 1,931
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From: Ontario, Canada
Car: 1989 IROC-Z
Engine: 5.7L EFI LTR setup
Transmission: T-5 World Class
also the auto's got the smaller cam than the manual 305's . Yeah I say high 15's ...especially with them gears 
I got a 15.1 in mine ( 1989 305 5 speed)
I got a 15.1 in mine ( 1989 305 5 speed) Thread Starter
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Joined: Mar 2004
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From: Pittsburgh & Allentown PA
Car: 1992 Z28 (Heritage Edition)
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 2.73 Posi
No in 91-92 the LB9's got the good cam, the SAME one that came in 305/5 speeds. Its been proven (which also means theres no need to debate it in this topic, please...if you dont believe me, do a search on it).
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Joined: Mar 2001
Posts: 5,144
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From: CC, TX
Car: 1999 Yamaha Banshee
Engine: 379cc twin cyl 2-stroke stroker
Transmission: 6 spd manual
Axle/Gears: 14/41 tooth
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Joined: Aug 2004
Posts: 1,327
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Car: 1987 IROC-Z Camaro
Engine: 5.7 350 TPI - SLP Runners, AFPR, MSD Goodies
Transmission: 700R4 - Shift Kit, Corvette Servo
Axle/Gears: BW 9 bolt, 3.27s
My l98 ran 15.2 in very stockish form. With better gears and a wee bit more power.
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From: southern maryland
Car: 2012 Ram express
Engine: 5.7 hemi
Transmission: auto
Axle/Gears: 3.55
if your look at the tech data part even the 91-92 lb9's still had a shitty cam but had a alittle more power then the years before but they defiently didnt have a the l98 cam which the 5 speed lb9's have. Easiest way you can tell is the l98 cam 305 cars have tachs that redline at 5500 my friends 91 formula lb9 auto redlines at 5000 and i say its a mid to high 15 second car bone stock. As for 87tpi350kid 15.2 thats horrible my 89 with 2.77 (yours have 3.27's) and just full exhaust ran a 14.4 spinning its *** off 2.2 60 foot im sure ur car was out of tune or spinning badly
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