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L98 Question?

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Old Feb 21, 2008 | 12:55 PM
  #1  
mr.camaro's Avatar
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From: Canada/Qc/Montreal
Car: Red 86 Iroc-z / Black 90 Iroc-z
Engine: Mild 350 / Vortec L31
Transmission: TH700R4 / TH700R4
Axle/Gears: 3.42 / 2.73
L98 Question?

Hey guys, i just swaped a L98 in my iroc. Although i do not have the car yet (still at garage -_-, lazy mecanique) i did here her run and runs very solide. i was just wondersing is there a big differance in power from the 305 TPI to a 350 TPI, & what does your L98 run at the 1/4 (dunno anything about 1/8) stock or with bolt ons. Thanks Jazz
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Old Feb 21, 2008 | 01:09 PM
  #2  
doc's Avatar
doc
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From: Mims, Florida
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
Re: L98 Question?

In totally stock trim and well tuned, you should run high 14s.

With boltons, it depends on what boltons and what you consider "boltons".
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Old Feb 21, 2008 | 06:09 PM
  #3  
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Joined: Apr 2006
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From: Columbus
Car: 88 Formula, 72 Nova, 68 Chevelle
Engine: L98, mild 350, L79 327
Transmission: 700R4, M20, M20
Axle/Gears: 9b 327,10b 373, 12b 331
Re: L98 Question?

I know my L98 completly stock ran 14.7's - 14.6 depending on the air that night. It has an after-cat and slp cold air now and runs 14.3 consistantly, has run a best of 14.1 with great air.
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Old Feb 22, 2008 | 07:01 AM
  #4  
mr.camaro's Avatar
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From: Canada/Qc/Montreal
Car: Red 86 Iroc-z / Black 90 Iroc-z
Engine: Mild 350 / Vortec L31
Transmission: TH700R4 / TH700R4
Axle/Gears: 3.42 / 2.73
Re: L98 Question?

Originally Posted by FormulaL98
I know my L98 completly stock ran 14.7's - 14.6 depending on the air that night. It has an after-cat and slp cold air now and runs 14.3 consistantly, has run a best of 14.1 with great air.
Thats exactly what i wanted to know, thank you. keep your L98 specs coming!
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Old Feb 22, 2008 | 08:52 AM
  #5  
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Joined: Apr 2006
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From: Columbus
Car: 88 Formula, 72 Nova, 68 Chevelle
Engine: L98, mild 350, L79 327
Transmission: 700R4, M20, M20
Axle/Gears: 9b 327,10b 373, 12b 331
Re: L98 Question?

http://video.cardomain.com/Clip.aspx...D5D1D3630809B4

If u wanna know kinda whats it gonna be like at the track, thats a pass i made last summer when the car was basically still stock.
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Old Feb 25, 2008 | 10:23 PM
  #6  
mr.camaro's Avatar
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Joined: Dec 2007
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From: Canada/Qc/Montreal
Car: Red 86 Iroc-z / Black 90 Iroc-z
Engine: Mild 350 / Vortec L31
Transmission: TH700R4 / TH700R4
Axle/Gears: 3.42 / 2.73
Re: L98 Question?

Thanks
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Old Feb 25, 2008 | 11:17 PM
  #7  
Orr89RocZ's Avatar
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: L98 Question?

bone stock L98 is a good deal faster than a 305. best 305's seem to be high 14's well driven. L98 is generally mid 14's. some lower, some slower

i've heard 13.90's at 99 from a stock L98. that being the quickest.

My 89 i feel would have ran 14.4-14.5's or so at 95 mph. not too shabby.
Full bolt ons later with a converter/slicks, i went 12.95 at near 104, so i'm happy with how the L98 runs
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Old Mar 9, 2008 | 07:00 PM
  #8  
mr.camaro's Avatar
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Joined: Dec 2007
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From: Canada/Qc/Montreal
Car: Red 86 Iroc-z / Black 90 Iroc-z
Engine: Mild 350 / Vortec L31
Transmission: TH700R4 / TH700R4
Axle/Gears: 3.42 / 2.73
Re: L98 Question?

i will have to weight and see hehe
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Old Mar 9, 2008 | 07:46 PM
  #9  
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From: Moscow Mills, Missouri
Car: Pontiacs, Jeeps
Re: L98 Question?

Originally Posted by Orr89RocZ
i've heard 13.90's at 99 from a stock L98. that being the quickest.
Stock? That's one I would have to see to believe. Im not saying you're lying...just that they were.
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Old Mar 9, 2008 | 08:31 PM
  #10  
Orr89RocZ's Avatar
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: L98 Question?

i agree, that is very very quick for a claimed stock L98 car. Its what i've heard and i've heard that before 2-3 times so maybe its possible? you'd need a great launch to make it happen. A L98 is only traction away from 13's i feel on a cold day and sealevel like conditions. stock auto stall tho will limit that ability to launch hard so i'm not sure. I've heard 14.3's alot to for 91-92 cars and thats pretty close to 13's
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Old Mar 9, 2008 | 10:07 PM
  #11  
mr.camaro's Avatar
Thread Starter
Member
 
Joined: Dec 2007
Posts: 125
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From: Canada/Qc/Montreal
Car: Red 86 Iroc-z / Black 90 Iroc-z
Engine: Mild 350 / Vortec L31
Transmission: TH700R4 / TH700R4
Axle/Gears: 3.42 / 2.73
Re: L98 Question?

check back to this post in 3 weeks, i should have what i ran, although i am having some problems with it, a little to riche, but should get it fixed.
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