FIRST START 402 with a 346 H/C tune; question . . .
11-19-2008, 08:32 PM
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FIRST START 402 with a 346 H/C tune; question . . . The only change will be the bigger cubes and a bump in compression. All the other motor parts will be transfered. Should I add some fuel before the initial start-up?
I've had 36 lb. FAST injectors with an upgraded fuel pump for a while now so I have plenty of injector for the cubes . . . but I obviously won't know the new a/f at cold-start idle or warm until after it's been started. Will it be okay on that tune for now?
Thanks!
I've had 36 lb. FAST injectors with an upgraded fuel pump for a while now so I have plenty of injector for the cubes . . . but I obviously won't know the new a/f at cold-start idle or warm until after it's been started. Will it be okay on that tune for now?
Thanks!
11-19-2008, 09:14 PM
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Just change the engine displacement per cylinder value and it
ought to be close, may need a little spark taken out of the
higher g/cyl areas for compression but that shouldn't bother
startup or cruise any.
ought to be close, may need a little spark taken out of the
higher g/cyl areas for compression but that shouldn't bother
startup or cruise any.
11-19-2008, 09:16 PM
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It's been a bit since I've done any MAJOR tuning on my set up 
Thanks Jimmy!
So what will the new values be? Just the displacement divided by 8? Value of 823?
Last edited by The Dragon; 11-19-2008 at 11:45 PM.