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ls/vtec tuning

Old 04-05-2005, 04:11 PM
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Default ls/vtec tuning

my buddy and i are throwing a b16 head on his DA with the golden eagle kit....he plans on using turbo edit with his stock pr4 and an rpm switch for vtec, it is all motor and basically it's a b18a block with usdm ITR pistons and now will have a b16a head, giving it 10.8:1 c/r....my plan is to chip the ecu and just use a stock pr4 bin, raise the rev limiter to about 7,800 and just add a little fuel to the stock pr4 bin where vtec engauges, but how much fuel should i add to the stock map considering it has almost 2 points higher than stock compression and now vtec....i was thinking like 5% from 4600 ( vtec activation) to redline...is this too much too little thanx in advance for your input guys...
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Old 04-05-2005, 05:25 PM
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Default Re: ls/vtec tuning

get a wideband or get on a dyno.

this sort of hybrid really needs to be tuned properly. as it is you're missing out on the timing maps that would benefit with the higher compression.

but if you're dead set on doing it like that, I'm without any clue as to what you should do for fueling.
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