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?

Re: p28 crome. tuner gurus.. welcome.
 

Well yea, you need to tune it.

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

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?

Re: p28 crome. tuner gurus.. welcome.
 

No

Re: p28 crome. tuner gurus.. welcome.
 

..ok... what do you suggest I try fixing?

Re: p28 crome. tuner gurus.. welcome.
 

Has it been tuned?

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.

Re: p28 crome. tuner gurus.. welcome.
 

Well yes, that's exactly what you have to do. You can't expect a car to run perfectly on a basemap, or there would be no need for tuners.

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.