what up everybody, I recently put the drag gen 3 kit on my 98 gs-r. I have added a 255 fuel pump, slim fans, and I have a greddy evo exhaust. Other than that its just the stock engine, not built at all. Anyways the car feels a little shaky when accelerating. I would imagine this is due to the lack of tuning. My local shop said to go with the p28 ecu to tune it with 440cc injectors. When all is said and done with the ecu, chip, conversion harness, injectors, dyno time, install it is a little pricey. Basically I want to know if there is a little bit cheaper route to go to tune it or is this pretty much my only option? I have never tuned a car so I am new at this but my ultimate goal for the car is to just run lower boost (7-10 psi) and have it as reliable as possible but still have decent power.

 

Dont cheap out on turbos.. especially the tuning. Its better to pay a lot now then having to replace your engine and go through all that trouble later when you blow it since its not properly tuned. You can probably get a p28 ecu from this site to save you a little bit of cash, but thats pretty much it.

 

a cheaper alternative would be get an fmu, missing link, and a vafc. have it tuned on that

 

I own a turbo GSR myself, so I know what you been through. Which program r u using to tune the car? VAFC, Hondata, AEM EMS? VAFC are very easy to tune 7-10psi no problem. But if you got the dough go Hondata or AEM.

 

use uberdata or crome if your broke thats what im doin my buddy went 11's in his ls turbo hatch 10lbs daily driven using crome

 

im running uberdata program on my obdI p72. its pretty cheap, kinda compare to hondata bc kind of the same set up. ya u need to tune it cuz i have a 96 turbo gsr also. if u dont have a FMU, get one but once u have a stable program running, u really dont need it bc thats how u control ur A/R and ur fuel system. i also 550cc injectors, that might be another reason, ur engine isnt gettin enough fuel

 

I already have the vortech fmu on the car, which came with the turbo kit, if I got the P28 ecu already chipped from say h-t, would I still be able to specify where I want fuel cutout, etc. or do I just have to stick with whatever the previous person set it at? I am kinda new to dealing with ecu's so forgive me for being naive. All I know is that the obd1 ecu's are easier to tune since they are prior to the gov. regulations in 96 but could someone enlighten me

 

get an obd1 gsr ecu.

 

P72?

 

what about greddy e-manage and injectors, then I could just piggyback my ecu and not have to change it out


Modified by tegtuner24 at 6:43 AM 6/17/2005


Modified by tegtuner24 at 6:44 AM 6/17/2005

 

 

https://honda-tech.com/zerothread?id=1258100

 

yes a p72, a p28 wont control ur secondary butterflys.

 

so the advantage of chipping the ecu is more power?, but a piggyback system like vafc would give me more tuning options like vtec engagement and fuel cutout but if it is a huge difference in power I would go ahead and chip the ecu even though it seems like it wouldnt be too reliable putting a 10+ year old ecu on my car. also if I got on the dyno with just a vafc and checked my a/f and I was running lean could I just bump up the pressure in the fpr to get more fuel instead of going out and buying injectors?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegtuner24 &raquo;</TD></TR><TR><TD CLASS="quote">so the advantage of chipping the ecu is more power?, but a piggyback system like vafc would give me more tuning options like vtec engagement and fuel cutout but if it is a huge difference in power I would go ahead and chip the ecu even though it seems like it wouldnt be too reliable putting a 10+ year old ecu on my car. also if I got on the dyno with just a vafc and checked my a/f and I was running lean could I just bump up the pressure in the fpr to get more fuel instead of going out and buying injectors?</TD></TR></TABLE>

a chipped p28 with uberdata is way more tunable than a vafc. dont cheap out, fuel management is the key to having a reliable turbo setup

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegtuner24 &raquo;</TD></TR><TR><TD CLASS="quote">so the advantage of chipping the ecu is more power?, but a piggyback system like vafc would give me more tuning options like vtec engagement and fuel cutout but if it is a huge difference in power I would go ahead and chip the ecu even though it seems like it wouldnt be too reliable putting a 10+ year old ecu on my car. also if I got on the dyno with just a vafc and checked my a/f and I was running lean could I just bump up the pressure in the fpr to get more fuel instead of going out and buying injectors?</TD></TR></TABLE>

that's a lot to be covered there. So I'll give it to you like this. If you want 7 PSI and under you can use the FMU or VAFC and you'll last a good amount of time, but NEVER go above that as a common rule, because they are not the best systems. If you are cheap like a lot of people look into Uberdata or Crome. They are free and offer endless power. You will need to chip, buy injectors and find a tuner that will tune with that program and not just hondata.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegtuner24 &raquo;</TD></TR><TR><TD CLASS="quote"> I would go ahead and chip the ecu even though it seems like it wouldnt be too reliable putting a 10+ year old ecu on my car.</TD></TR></TABLE>

ECUs don't have moving parts...they will last Forever

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegtuner24 &raquo;</TD></TR><TR><TD CLASS="quote"> also if I got on the dyno with just a vafc and checked my a/f and I was running lean could I just bump up the pressure in the fpr to get more fuel instead of going out and buying injectors?</TD></TR></TABLE>

no, for a VAFC you will need injectors. The only system that uses stock injectors is the FMU setup