Quote:
Originally Posted by mid_life_crisis
I've been reading about how unmodified cars can safely run E85 tunes even though technically the tunes are Stage 2.
The non-E85 tunes are safe on 91 octane. My question is: if my car is unmodified except for an upgraded air filter insert, but I have access to 93 octane, can I safely run it on an EL header stage 2 tune and get a little more grunt?
If my question has been covered (more than likely it came up already), someone please point me to the post.
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The stage 2 will probably run too rich because it won't be able to flow enough from the restrictive header. It isn't a timing issue, it is a flow issue.