Quote:
Originally Posted by Tainen
I've got the dyno numbers that say different.  I'd love to see them with a tune as well though, some day. Track time is more important right now for me.
I just want to make sure people know that you don't "need" a tune with headers. My AFR looks good, and the headers were designed to be fine on stock tune, and it pulls nice and hard (and these were the first dyno proven headers on the forums, I might add). |
I see you have one of the early prototype nameless headers... no offense but those do not flow as well as the newer 4-1 long tube designs or the yet to be released nameless 4-2-1 long tube (which i am on the waiting list for). For those I believe you are correct that you don't NEED a tune because they did not change the flow / back pressure characteristics as much as the newer long tube 4-1 or 4-2-1 designs.
I still think you would notice a nice difference with a custom tune though because the stock cam timing is the way it is to work around the limitations of the stock header in the dip region.
So, to revise my opinion
headers that don't flow much better than stock probably won't benefit from, or change afrs enough to warrant a custom tune.