Best 496 headers?
#81
Lakeside Restorations.com
Commercial Member
Just to clarify, that lean condition is the result of only adding the exhaust. No ECM modifications were done. That lean condition is exactly what we've being talking about in this thread. The 3 pound fuel pressure increase brings that number back down to 13.5.
As previously stated, I find it amazing that no other exhaust company is suggesting the fuel pressure increase.
Anyways, we've done the testing and make the suggestion to do the fuel upgrade.
As previously stated, I find it amazing that no other exhaust company is suggesting the fuel pressure increase.
Anyways, we've done the testing and make the suggestion to do the fuel upgrade.
Thanks for helping to clarify this better.. Jamie / Lakeside
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#82
Lakeside Restorations.com
Commercial Member
Let me know when you are ready... Jamie / Lakeside
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#84
SeaRay Sundancer
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#85
Lakeside Restorations.com
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Your application looks like it may be tight & Not fit. If you call me I will tell you how to measure to see if they will work.. Jamie / Lakeside 570-639-2628
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#86
Lakeside Restorations.com
Commercial Member
Premium fuel is not required with the Dana system on an otherwise stock set up. However the independent dyno shop used premium when running it on the dyno, thats why it shows that. You may still run the 87 octane in it.. On a personal note even though that is all merc says is required, I personally try to run 89 in my personal 496 set up. Eventhough I know I dont have to run it in there. There is not much price difference so therefore I spit the difference.. jamie / Lakeside
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#88
Lakeside Restorations.com
Commercial Member
For those that are curious as to where to measure here is a visual to help you.. Jamie / Lakeside
Keep in mind I believe you will need 1.25 to 1.5" more width than your existing manifolds (not risers). If it close the inner manifolds can be shaved a little over 1/8th but not quite 1/4".. Please take in to consideration the center lift if your boat is equipped..
Keep in mind I believe you will need 1.25 to 1.5" more width than your existing manifolds (not risers). If it close the inner manifolds can be shaved a little over 1/8th but not quite 1/4".. Please take in to consideration the center lift if your boat is equipped..
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#89
SeaRay Sundancer
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#90
Lakeside Restorations.com
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Actually unless they have changed things, Or my memory is lax, it should not make much of any difference. Lower octane fuel burns faster thus the knocking in higher compression engines. The higher octane burns slightly slower & a bit more controlled whick is what aids it in reducing knocking & heat.. Jamie
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