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Old 09-16-2003, 12:30 PM
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l98 VS 041 heads

i was wondering how the L98 heads would compare to 041 heads. also, what cam and compression did the L98 have? thx.

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Old 09-16-2003, 06:35 PM
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L98`s came with roller cams, don`t know the size but it should be easy to find on a web search. the L98 heads had 58cc chambers, but they aren`t known to flow real good, but they work decent. I would use the 041`s, they respond well to a pocket port and a good set of valves. the L98`s came with 9.5:1 compression with deep dished pistons due to the small chamber.
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Old 09-16-2003, 11:26 PM
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The l98 heads were a good thing that gm started to do but kinda half a** finished the ports, they left them with a lot of casting flash and terrible uneven surfaces that should have been addressed at the factory. However They can flow very well after a bunch of port cleanup The l98 heads also will save a bunch of weight over the old iron heads, and are also better at heat dissipation which means you can get away with more compression


I personally owned an engine with i98 heads that pulled 302 horse at the back tires a couple of years ago at car-craft summer nationals on the chassis dyno. For a street 350 with a solid flat tappet cam and not much else special that is very respectable horse power.

the l98 heads are a very capable cylinder head. they just need some attention..............................
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Old 09-25-2003, 09:07 PM
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l98 heads are 72 cc heads their alright not the best l98 9.5 to 1
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Old 09-25-2003, 09:23 PM
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L98 heads we just installed on my brothers vette are 58cc, I never seen any that were 72.
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Old 09-26-2003, 10:46 AM
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There were 2.......

variations of the L98 heads. The 58cc aluminum version that came on Vettes, and the 64cc version that came on IROC Camaro's, Trans Ams, and Formula Birds. They are a pretty good street head, but not that good for high horsepower/high RPM applications due to their 1.94 intake valves. Both versions use center bolt valve covers and self-aligning rocker arms. These heads are sometimes referred to as TPI heads.
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