Top speed

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Jun 26, 2003 | 12:15 AM

Shane87Irocz

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Joined: Feb 2003

Posts: 95

From: Illinois

Top speed

what is the top speed of a 87 Iroc-z with a L-98 with bolt on's

Shane

Jun 26, 2003 | 01:17 AM

doug791

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Joined: Mar 2003

Posts: 1,240

From: Markham, ON

well from stock i "think" were around 140 mph? depends on the bolt ons what are they? My car has a shift kit and headers but it also has 3.73 gears....figure they cancel each other out

Jun 26, 2003 | 12:32 PM

MY91Y84

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Joined: Jun 2003

Posts: 573

From: Just outside of "D-town"

the auto l98 cars with 2.73 gears will do 145
the LB9 g92 cars..will top out at 147...mine did anyway

Jun 26, 2003 | 10:27 PM

Rustsucks

Registered User

Joined: Jun 2003

Posts: 17

From: Spokane/Richland WA

Mine did a 157 with a Tremec TKO/K&N/headers and 2.77 gears. What a rush!

Jun 27, 2003 | 12:24 AM

stevem

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Joined: May 2002

Posts: 369

From: Kelowna,BC,Canada

i had my speedo pointing straight down(140mph speedo)

Jun 27, 2003 | 09:25 AM

HardDriver

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Joined: Feb 2003

Posts: 90

From: Detroit area (Downriver)

I had mine at 140 and still pulling with the mods below.

Jun 27, 2003 | 03:36 PM

CODY BEHNKE

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Joined: Oct 2000

Posts: 711

From: Nebraska

When they were new GM and most magazines were quoting a top speed of 145-147mph for the L98 350 cars the G92 LB9 305's could do about the same since you could hold a higher gear.

To really see any difference in top speed you will need some pretty serious bolt ons.