The Definitive "VVT swap into 90-97 chassis" Megathread.
#101
For those running a stock VVT motor, what does your spark table look like? I swapped back to an OEM airbox the other day and today I noticed what sounded like pinging while cruising on the highway at 4k rpms if I gave it a bit of gas, although it's hard to tell with all the wind noise. I've been running the same tune for almost a year, and haven't blown it up yet, including a few autocrosses and a track day, let alone about 20k street miles, so I don't think my tune is that off, but I'd like other opinions. Here is my current spark table. I don't remember exactly where I got it from, but it was snagged from a thread somewhere on this forum.
Without seeing your VVT table, I'd guess you're about 5° too much advance everywhere. Have you verified base timing? Restricted intake would not likely lower det threshold unless you're getting a ton of heat soak. Plastic intake pipes will do that.
Anyway, this is a bit of thread drift. Start a new thread with something like " VVT spark advance table question"
__________________
#102
Yikes. What octane/state?
Without seeing your VVT table, I'd guess you're about 5° too much advance everywhere. Have you verified base timing? Restricted intake would not likely lower det threshold unless you're getting a ton of heat soak. Plastic intake pipes will do that.
Anyway, this is a bit of thread drift. Start a new thread with something like " VVT spark advance table question"
Without seeing your VVT table, I'd guess you're about 5° too much advance everywhere. Have you verified base timing? Restricted intake would not likely lower det threshold unless you're getting a ton of heat soak. Plastic intake pipes will do that.
Anyway, this is a bit of thread drift. Start a new thread with something like " VVT spark advance table question"
#104
Do we just ditch the little inductor /capacitor on the back of the vvt engine? 94-97 injector/ignition harness doesn't have a plug for it . I'm going to be working on this all day today.. If someone who's done this is willing to let me text /call them with questions as I go I would be eternally greatful
#106
Alright thanks. For now I'm putting the vtcs manifold back on until I can find a square top to put on it. Is it okay to just hook the butterfly actuator directly to vacuum? I don't have the solenoid, and it's normally open. I don't want to deal with trying to delete it since this manifold isn't permanent anyway. Also, the back end of the 02 transmission that came with this engine looks nothing like that one that came out of my car. I can't see how my shifter will fit on there.. The one that came out of my car has the shift rod(?) exposed, the new one is covered and has 4 bolts where it looks like the shifter should attach.
Edit: Maybe I got a 6 speed and didn't know it?
Edit 2: I'm an idiot. It's a 5 speed, just missing the shifter cover shown on this pic... http://teamtac.org/e107/e107_files/p...0_img_7790.jpg
Edit: Maybe I got a 6 speed and didn't know it?
Edit 2: I'm an idiot. It's a 5 speed, just missing the shifter cover shown on this pic... http://teamtac.org/e107/e107_files/p...0_img_7790.jpg
Last edited by Morello; 03-15-2015 at 05:13 PM.
#107
I had the opportunity to speak with a gates belt rep a while back. I learned that serpentine belts make noise when they are worn out. You can tighten the crap out of them but they will still squeak. There is a thin gauge available to check the groove depth on the belt. Basically, if the gauge is in the groove and you see it, belt is worn out. If a non v belt is noisy, just replace it.
#108
Does anyone know what the pinout is at the 2 pin connector of the nb1 alternator?
I need to know which pin goes to the 1O pin of nb1 ecu (field out).
One of these goes to 12v or something or nothing or ??
One of these goes to my 5v pwm
Which is which? (I know I can open it up and look, but please save me that trouble)
I'll provide this thread with a writeup of MS3 and nb1 alternator control in an NA6 once I have it working
I need to know which pin goes to the 1O pin of nb1 ecu (field out).
One of these goes to 12v or something or nothing or ??
One of these goes to my 5v pwm
Which is which? (I know I can open it up and look, but please save me that trouble)
I'll provide this thread with a writeup of MS3 and nb1 alternator control in an NA6 once I have it working
#110
"Alternator and pulleys
Use a 1994-1997 alternator and pulley. The 1.6 alternator has a different shaft diameter, so a pulley swap is not possible - the entire alternator must be swapped. It may be possible to use the 99-05 ECU with wiring changes and an ECU with alternator control, but few/no PnP ECUs for 1990-1997s will have this feature, so it's easiest to simply use a 94-97 alternator with onboard control. "
Would it not be possible to use the 90-93 alternator and swap the 1.6 crank and water pump pulleys? Does the 1.6 long nose crank pully not fit on the 1.8?
Great thread. I missed the info about needing a 99-00 fuel rail in my previous research. Will have to come up with one of those.
Use a 1994-1997 alternator and pulley. The 1.6 alternator has a different shaft diameter, so a pulley swap is not possible - the entire alternator must be swapped. It may be possible to use the 99-05 ECU with wiring changes and an ECU with alternator control, but few/no PnP ECUs for 1990-1997s will have this feature, so it's easiest to simply use a 94-97 alternator with onboard control. "
Would it not be possible to use the 90-93 alternator and swap the 1.6 crank and water pump pulleys? Does the 1.6 long nose crank pully not fit on the 1.8?
Great thread. I missed the info about needing a 99-00 fuel rail in my previous research. Will have to come up with one of those.
#116
Former Vendor
Thread Starter
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,100
With this method (99 rail + 93 FPR) you aren't really changing the mechanical properties of the fuel system. It's still an atmospheric referenced ~43psi base system with a single regulator. If you want to keep the hot start solenoid, keep it, if you want to repurpose the wires, you can do that too.
#120
Elite Member
iTrader: (15)
Join Date: Jan 2007
Location: Murfreesboro,TN
Posts: 2,045
Total Cats: 265
I used the wiring from the pressure up solenoid in for my VVT solenoid (see earlier responses). I did it because the pressure up solenoid (a switched 12v+ and trigger) was already a part of the injector wiring harness. I just added the VVT pigtail to the existing wiring and moved the trigger wire on the ECU side (AEM EMS). It was a lot easier than having to patch into the 12v+ from the injectors and run a new trigger.