Jersey Posted June 4, 2004 Share Posted June 4, 2004 I've read all the posts that i could find, including Afshins great write up and received great info from FL327 but, of course, i still have a couple of questions. I have access to both a '88 NA ECU and an '88 Turbo ECU for the same price. Here's what i "think" i understand so far - they're both 16 bit; I'll need to have the NA ECU remapped to adjust for timing and my 370's; I'd need to use a Titania type O2 with the Turbo ECU which would require me to weld a new bung on my DP. Here's what i'm unsure about... If i went with the Z31 turbo ECU, would i need to have it re-mapped for my 370's and timing.. or anything else for that matter? Can the Turbo ECU be remapped? (maybe should have asked this first ) I'm thinking of replacing my O2 to interface with the LM-1. Are there any Titania type O2's that i can use for both the turbo ecu and the LM-1 if i choose the turbo ecu? If so, suggestions on which? Does it matter what year, make or model 84-89 MAF & chopper wheel i get for either ECU or are they all the same? When the NA code is altered, how much does the timing get retarded per LB of boost? And, is this amount the same as the non-altered turbo ECU? What's your opinion on my best choice? Sorry if all these questions have been answered in some post somewhere. Appreciate it in advance for any suggestions. Quote Link to comment Share on other sites More sharing options...
Bernardd Posted June 4, 2004 Share Posted June 4, 2004 Can the Turbo ECU be remapped? (maybe should have asked this first Smile Yes. The same code is used in both ecu's except for a few constants and the fuel/timing maps. Does it matter what year, make or model 84-89 MAF & chopper wheel i get for either ECU or are they all the same? Both the same. When the NA code is altered, how much does the timing get retarded per LB of boost? And, is this amount the same as the non-altered turbo ECU? You can set the timing table to whatever you want. Or need. Same goes for the fuel map. I like the 88na ecu because then I can use the stock o2 sensor. FYI you can set the ecu not to use the o2 correction, remove the sensor, install the LM-1 and tune to suit your needs. This is what I'm doing. You'll need the equipment to burn eproms or pick up a romulator and have a chip burned after you're happy with the tune. Bernard Quote Link to comment Share on other sites More sharing options...
Afshin Posted June 4, 2004 Share Posted June 4, 2004 Hey Jersey Regarding the 370cc injectors, you will need to have the chip remapped or modify the MAF as sleeperZ did (I believe he took the internals of the MAF and put them in a 30% larger pipe to balance out the larger injectors) for either ECU. I first used an 84 turbo ecu, which showed great improvement from stock and then wanting more as usual, I got an 88 NA ecu which Bernard remapped for me for a turbo appropriate timing curve, t3/t4 flow and 370cc injectors. All I can say is that I was very happy with the initial 84 turbo ecu set up, worked well and was reliable. As for the 88 ecu as modified by Bernard, it clearly exceeded my expectations by further improving bottom end response which I was not expecting (16 bit vs 8 bit processor I guess),in addition to the obvious gain in top end from the 370cc injectors and higher boost Bernard and I are further fine tunning my set up and I plan on taking it to the dyno once done. I will post the updates in the swap guide after all is fully tested. Unfortunately I don't know about 02 narrow band and wideband 02 sensor cross-compatibility. Try contacting the company and ask if the wideband 02 sensor used for the LM-1 can used as a narrow band sensor for either a titania or zirconia type sensor/ecu. Let us know if you find out. Quote Link to comment Share on other sites More sharing options...
yo2001 Posted June 5, 2004 Share Posted June 5, 2004 87-88 were high impedent (spell) injectors wasn't it? get a N/A and get them reprogram for Cobra MAF 8) Quote Link to comment Share on other sites More sharing options...
Afshin Posted June 5, 2004 Share Posted June 5, 2004 All 88-89 (turbo and non-turbo) used high impedance injectors, meaning that if you are using low impedance injectors such as the stock or SVO's...and an 88-89 ecu, you will need six 6.8ohm/10watt resistor to be put in line with the injector signal/wire comming out of the ecu pins 101-106.Tthis is real easy to do, cut the wire and place resitor in line. (I believe bernard has been running his set up without the resistors and without burning out the injectors so far.) all other years are low impedance. Quote Link to comment Share on other sites More sharing options...
Jersey Posted June 5, 2004 Author Share Posted June 5, 2004 Thanks for all the info guys. I understand about the inline dropping resistors for my 370svo injectors, no problem. So, with all that you've suggested, the NA ECU is probably the way to go because it will be easiest/cheapest because both ECU's will need re-mapping anyway and you wont need to change out the O2. I thought the easiest/cheapest way out was to use the turbo ECU since it was already set up for boost timing and bigger injectors (thought the turbo Z31's ran bigger injectors?) and wouldn't need to be reburned, just a new O2. Not so i guess. Does the Z31 MAF cause any problems after a chip burn or cause a certain limitation to your build? Just wondeing because of your statement Yo about the cobra MAF. I see when you go the JWT way, this is what they use and was just wondering the difference, if just not it's size. Once again, thanks guys. Learning something new every day. This is good Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.