3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

L98 vs LT1

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Old 03-04-2007, 05:10 PM
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L98 vs LT1

I'm sure this has been done a million times, but can anyone give me a link comparing and contrasting L98s to LT1s? I love 3rd gens but would like to start learning the ins and outs of the L98 engine. Didn't it come in Corvettes of this era too?
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Old 03-04-2007, 08:13 PM
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yes the l98 came in 85-91 corvettes and camaro 87-92. corvettes got a diff. cam with aluminum heads.
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Old 03-04-2007, 09:22 PM
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Lt1's got better heads and intake system. Also reverse cooling. They also got the opti which many consider a downgrade.

With the big improvement in cylinder heads, cams etc. I see no need to go to an LT1. You can make good power with the L98.
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Old 03-05-2007, 12:56 AM
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The L98 is a very bottem-end power engine, L98's make the power much quicker than LT1's and LS1's, but on the downside, you don't have the top-end power like the other motor's. With that being said, a new intake(Holley Stealth Ram?) and a new cam(Hot Cam?) will really open up your top-end and you'll be outrunning LT1's.
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Old 03-05-2007, 09:53 AM
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Originally Posted by Cam-aro
The L98 is a very bottem-end power engine, L98's make the power much quicker than LT1's and LS1's, but on the downside, you don't have the top-end power like the other motor's. With that being said, a new intake(Holley Stealth Ram?) and a new cam(Hot Cam?) will really open up your top-end and you'll be outrunning LT1's.
yes and no lt1 engines being comp. controlled have an endless supply of mods and have an incredible amount of torque compared to an ls or l98. An lt1 with about $500 will make you 400-5000 ft lb easy
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Old 03-05-2007, 12:30 PM
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91 RS w/ TBI. I thought 87-92 maros had L98s. Was that an option or something.
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Old 03-05-2007, 01:49 PM
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What about the L98s? What camaros where they on?
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Old 03-05-2007, 02:11 PM
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L98

Were an option on the 87 thru 90 or 92
Iroc-Z and Irocs.
Also the Firebirds.

Later
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Old 03-05-2007, 02:24 PM
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Originally Posted by Delirus
yes and no lt1 engines being comp. controlled have an endless supply of mods and have an incredible amount of torque compared to an ls or l98. An lt1 with about $500 will make you 400-5000 ft lb easy


Hmmm... last time I checked my L98 was computer controlled and, as a side note, the LT1 stock for stock made the least amount of torque out of the three.
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Old 03-05-2007, 10:12 PM
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Originally Posted by mako350Z28
Hmmm... last time I checked my L98 was computer controlled and, as a side note, the LT1 stock for stock made the least amount of torque out of the three.
Torque-wise yes... your right.
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Old 03-06-2007, 05:36 AM
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87-92 camaros IROC/ Z28. 5.7L 350. Again not all of them, it was an option
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Old 03-06-2007, 03:31 PM
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Originally Posted by Cam-aro
Torque-wise yes... your right.

And that is exactly what I was refering to.
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Old 03-07-2007, 04:46 AM
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also note that L98 is the RPO code for the 350 TPI, which was only available with automatic transmission (700r4) Z28's, IROC-Z's, Formula's, GTA's had the L98 option. the 305 TPI (LB9 RPO code) was availble on the same models but had the option of the 5 spd.
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Old 03-08-2007, 12:39 AM
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Originally Posted by 89_Irocz
yes the l98 came in 85-91 corvettes and camaro 87-92. corvettes got a diff. cam with aluminum heads.
No, same camshaft. The only difference between the F-body engine and the Corvette engine was the Corvette's aluminum heads, and the external EGR system, since the heads didnt have it built-in.
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Old 03-08-2007, 01:27 AM
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maro z28 you may want to check out www.thirdgen.org and you can look at the tech articles and search the forum.
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