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p28 crome. tuner gurus.. welcome.

Old 12-14-2007, 01:03 AM
  #1  
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Default p28 crome. tuner gurus.. welcome.

I have stock z6 in my 98 civic dx hatch. obd2a-obd1 conversion harness to chipped p28 with basemap from ------------- bin.

So the problem is.. Car runs well but no low-end at all.. is it because I have no back pressure..? I have straight downpipe 3" and colder side of the charge pipe is 2 1/4 and hotter side of the turbo is 1 3/4 or 2.

My question is.. could I adjust the map to make it run better? also when I turn on the a/c I lose major power from 2k~4k. Car barely makes uphill and stuff. I just started chipping my own ECU and try tuning it.. but without any A/F gauge. I have the VW GTI sensor and all.. but just waiting on JAW to start selling their ---- again. whatever.. so anyways, any advice?
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Old 12-14-2007, 02:27 AM
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Default Re: p28 crome. tuner gurus.. welcome.

what size turbo you got ?


i have the thunderbird .60/.48 i dont make boost till 3800 max till 4100 ish so yea your car just like mine will be a na slow turbo from 2k-4k
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Old 12-15-2007, 05:34 PM
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Default Re: p28 crome. tuner gurus.. welcome.

baby dick turbo.. .42 .48 garrett off of volvo or saab I think.

When the ac is off it drives okay.. I mean no power still yet but when I turn the ac on.. like there is no torque at all.. the rpm will very slow till about 2.5 then it's like vtec ON power starts coming.. is that normal?
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Old 12-15-2007, 08:33 PM
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Default Re: p28 crome. tuner gurus.. welcome.

..ok... what do you suggest I try fixing?
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Old 12-16-2007, 08:36 AM
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Default Re: p28 crome. tuner gurus.. welcome.

negative.. noobie in training. I just bought the hulog for dataloggin and trying to get some wideband display somewhere to see how my car is running. Just trying to see if I can tweak the map in the mean time to run it a little better.
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Old 12-17-2007, 03:45 PM
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Default Re: p28 crome. tuner gurus.. welcome.

i still think it would have some power. Ive never seen a car run that bad on a basemap.. My guess is something else is fucked up. How much vacuum does it pull? Compression test? If it can barely make it up a hill, thats a problem.
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