58cc L98 Head Question
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Joined: Feb 2001
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From: Corona CA
58cc L98 Head Question
I was just wondering what the exact reason(s) could be for the 87-91 L98 heads having such small combustion chambers could be?
Do the smaller chambers require less fuel to make the sufficient power? I realize since their smaller they create a higher compression ratio also. Is this how the later L98s were able to make more power? How much did they make toward 91?
Do the smaller chambers require less fuel to make the sufficient power? I realize since their smaller they create a higher compression ratio also. Is this how the later L98s were able to make more power? How much did they make toward 91?
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: 58cc L98 Head Question (84Coyote)
In '88 the design switched to (#113) "D"-shaped exhaust ports which gave an additional 10hp (masked by the "frisbee") and in '90 the piston design was changed to give higher compression and a 5hp boost.
Former Vendor
Joined: Jun 2001
Posts: 7,204
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From: St Marys PA
Re: 58cc L98 Head Question (84Coyote)
You're question is sorta answered by yourself.
With any setup the CR is probably one most important aspect. So design/intent of the motors was probably designed with that being the optimum CC for the head. it both achieved what they were after as far as performance/emmissions/durability.
:thumbs:
With any setup the CR is probably one most important aspect. So design/intent of the motors was probably designed with that being the optimum CC for the head. it both achieved what they were after as far as performance/emmissions/durability.
:thumbs:
