Fastest Verts
Thread Starter
Joined: Jul 2010
Posts: 833
Likes: 17
From: The Jersey Shore
Car: 1991 Firebird Convertible
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.45 9 Bolt Posi
Fastest Verts
Just curious who got some of the fastest verts, what kind of power you are making, and what supporting suspension mods you've made to handle the power.
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Member
Joined: Feb 2008
Posts: 496
Likes: 1
From: Los Angeles (310)
Car: 89 IROC-VERT
Engine: TPI 305
Transmission: 700R4 Auto
Axle/Gears: 2.77
Re: Fastest Verts
What no responses yet?? Ok I'll go first.. stock 305 (BEAST) auto, 2-something gears. Anybody want to race, keep in mind your racing the driver not the car!!! YEEEAHH BUDDY!!!
Joined: Sep 2005
Posts: 6,258
Likes: 6
From: O'Fallon, MO
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: Fastest Verts
Unfortunately I was only able to take mine to the track once this year, which also happened to be my first actual 1/4 run in the car after my swap. So my only time is my best time. I went 12.15 @ 116mph spinning through 1st gear and shifting like I was eating a sandwich. Should be able to knock out an 11.7 or so with practice.
Thread Starter
Joined: Jul 2010
Posts: 833
Likes: 17
From: The Jersey Shore
Car: 1991 Firebird Convertible
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.45 9 Bolt Posi
Re: Fastest Verts
im just hoping when i get to teh track to be sub 14. 13.9999 and im a pig in s h i t
Supreme Member
iTrader: (2)
Joined: Nov 2000
Posts: 1,295
Likes: 0
From: California
Car: 1988 Camaro Convertible
Engine: 355
Transmission: 700r4
Re: Fastest Verts
Unfortunately I was only able to take mine to the track once this year, which also happened to be my first actual 1/4 run in the car after my swap. So my only time is my best time. I went 12.15 @ 116mph spinning through 1st gear and shifting like I was eating a sandwich. Should be able to knock out an 11.7 or so with practice.
Member
iTrader: (6)
Joined: Aug 2012
Posts: 466
Likes: 1
From: TN
Car: 1990 Camaro RS
Engine: L31
Transmission: 700R4
Re: Fastest Verts
It's up to the track to decide what they allow. He very well could have been kicked out after that run or they may not have cared.
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Member
iTrader: (1)
Joined: Jan 2002
Posts: 482
Likes: 0
From: Michigan!
Engine: Vortec 4200 Inline 6 PT70 Turbo..
Transmission: 4L65E
Axle/Gears: 3.73
Re: Fastest Verts
My last engine went 11.05 @ 127.7 mph on motor
9.85 @ 140.6 with a 200 shot.
This new turbo 6 banger feels pretty mean with 10psi. I can't tell how fast though. Could be 12's..could be 10's... it should be making at LEAST 450fwhp but it could be making 500+. The tuner thinks it may be closer to 600hp based on the MAF reading 60lb/min of air at 6650rpm. Double what the stock 300hp engine reads.
Bone stock, my vert went 15.7 @ 87mph.. Haha a 75 shot took it to 14.2 @ 100
9.85 @ 140.6 with a 200 shot.
This new turbo 6 banger feels pretty mean with 10psi. I can't tell how fast though. Could be 12's..could be 10's... it should be making at LEAST 450fwhp but it could be making 500+. The tuner thinks it may be closer to 600hp based on the MAF reading 60lb/min of air at 6650rpm. Double what the stock 300hp engine reads.
Bone stock, my vert went 15.7 @ 87mph.. Haha a 75 shot took it to 14.2 @ 100
Junior Member
Joined: Nov 2012
Posts: 50
Likes: 0
From: Stockton
Car: Camaro SS
Engine: 5.7
Transmission: 4l60e
Axle/Gears: 4.10
Re: Fastest Verts
Unfortunately I was only able to take mine to the track once this year, which also happened to be my first actual 1/4 run in the car after my swap. So my only time is my best time. I went 12.15 @ 116mph spinning through 1st gear and shifting like I was eating a sandwich. Should be able to knock out an 11.7 or so with practice.
Supreme Member

Joined: May 2005
Posts: 1,058
Likes: 4
From: Malvern, Arkansas
Car: 90 IROC 2-92 Zs blk vert & prpl
Engine: stealth ram brodix track 1 ful port
Transmission: 700r4 4l80e
Axle/Gears: iroc 375 lokr 92 Z 277 pos vert 327
Re: Fastest Verts
Most people make cruisers out of there vert (like me) since they are structually the weakest model. They try and find a hardtop to make power with.
Senior Member
iTrader: (2)
Joined: Mar 2003
Posts: 859
Likes: 5
From: Birmingham Alabama
Car: 1991 Firebird convertible
Engine: LQ4 ls 6.0
Transmission: 4L60E
Axle/Gears: 342 Limited slip
Re: Fastest Verts
I havent been to the track with it but I think it should be in the low 13s hight 12s I have ran a few SRT8s and we are side by side and I am having a MSD 6AL installed and a 342 gear inplace of the 273 what do you guys think ???
Supreme Member
iTrader: (29)
Joined: Sep 1999
Posts: 1,410
Likes: 2
From: Location, Location!
Car: 92 T/A 'vert
Engine: Mild .040 over L98 4 bolt mains
Transmission: Mostly stock 700R4, 2600 Vigilante
Axle/Gears: LS1 3.42
Re: Fastest Verts
Check out my sig. Not much but I like it.
COTM Editor
iTrader: (11)
Joined: Mar 2006
Posts: 4,098
Likes: 14
From: WINDSOR, CO
Car: 91 Z28, 87 SC, 90 IROC, 92 RS
Engine: LS1, 305 TPI, L98, NADA
Transmission: T56, 700r4's, and NADA
Axle/Gears: 3.89, 3.42, 3.23, NADA
Re: Fastest Verts
I'm gonna guess mine is own of the slowest haha! Completely stock other than catback 5.0L @ 5300ft... Guessing 16.2-5's up here.
Joined: Sep 2005
Posts: 6,258
Likes: 6
From: O'Fallon, MO
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: Fastest Verts
I was under the belief that a convertible couldn't run 1/4 mile runs (NHRA rules or some such) if they were going to run sub 14 seconds without a complete roll bar? I believe your car, especially, would do sub 12's all day long, just wondering how you were able to do it; law wise. Id love to run mine when its done, but I do not want a roll bar.
My preferable alternative is to just make more power to go faster. I'd love to slap a Magnacharger or something on it.
Mine bone stock with the 305TPI ran 15.5 at I believe 86-89mph, don't remember the trap speed but I remember the ET vividly.
COTM Editor
iTrader: (11)
Joined: Mar 2006
Posts: 4,098
Likes: 14
From: WINDSOR, CO
Car: 91 Z28, 87 SC, 90 IROC, 92 RS
Engine: LS1, 305 TPI, L98, NADA
Transmission: T56, 700r4's, and NADA
Axle/Gears: 3.89, 3.42, 3.23, NADA
Re: Fastest Verts
Member
Joined: Aug 2007
Posts: 386
Likes: 1
From: Panhandle of Florida
Car: 85 IROC / 92 Z28 Vert / 57 210
Engine: L69 / LB9 / LQ4
Transmission: T5 / T56 / 4L65E
Axle/Gears: 3:73 / 3.73 / ?.??
Re: Fastest Verts
Mine probably had you beat for slowest.... all stock with 2.73...... ohhh did i forget to mention i have 20's..... it was soooooooooo slow. the 3.73's definitely brought it back to life, but it won't win any races anytime soon.... except against my old TR7 Vert.
COTM Editor
iTrader: (11)
Joined: Mar 2006
Posts: 4,098
Likes: 14
From: WINDSOR, CO
Car: 91 Z28, 87 SC, 90 IROC, 92 RS
Engine: LS1, 305 TPI, L98, NADA
Transmission: T56, 700r4's, and NADA
Axle/Gears: 3.89, 3.42, 3.23, NADA
Re: Fastest Verts
Being at sea level is like a supercharger man! Mine is still rocking 2.73's up here too.
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