Is a tune absolutely necessary for this?...
#1
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Is a tune absolutely necessary for this?...
Guys,
I just replaced a 323ci (5.3L) with a 408ci(6.7L)....the intake/TB,MAF, and everything else (fuel pump, electrical harness, all accessories) are the same.
What's new are the LT headers, 44lb injectors, bigger cam and CNC'c 243 heads. The 408 fired right up, sounds great and idles perfect.
So my appointment with the dyno-shop isn't for another 2 1/2 weeks....so you know what I'm thinking here....
What could I potentially screw up by taking it for a spin to break in the ring seals?...
Stroker2112
I just replaced a 323ci (5.3L) with a 408ci(6.7L)....the intake/TB,MAF, and everything else (fuel pump, electrical harness, all accessories) are the same.
What's new are the LT headers, 44lb injectors, bigger cam and CNC'c 243 heads. The 408 fired right up, sounds great and idles perfect.
So my appointment with the dyno-shop isn't for another 2 1/2 weeks....so you know what I'm thinking here....
What could I potentially screw up by taking it for a spin to break in the ring seals?...
Stroker2112
#4
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OK, so would the larger injectors spray more than the old ones even if the fuel delivery setting is fixed in the PCM?...if so then I understand the a/f will be too rich (but how much richer?...what would happen if someone ran too rich for say....10-20 miles?) I haven't upgraded the fuel pump yet either...