Originally Posted by wkndracr
(Post 1211688)
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" |
Originally Posted by emilio700
(Post 1211735)
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" |
Zoinks. I would pull 10 degrees from that at WOT until you can verify the tune on a dyno.
|
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 :D
|
Yes, you ditch it. There's a similar unit on 1.6s on the ignitor bracket. Not sure if they're pnp though. Or if they do the same thing even.
|
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 |
Originally Posted by curly
(Post 1204080)
I almost wish I did that. I think ribbed belts look much more modern, but I've never had issues with squeaking V-belts like I have with NB belts. They seem much more sensitive.
|
1 Attachment(s)
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 https://www.miataturbo.net/attachmen...ine=1426522794 |
1 Attachment(s)
Found the wiring diagram with the plug pinout. The simple things in life.
https://www.miataturbo.net/attachmen...ine=1426651061 |
"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. |
Originally Posted by Ziggo
(Post 1217270)
Would it not be possible to use the 90-93 alternator and swap the 1.6 crank and water pump pulleys? |
I prefer the 1.8L pulley that was designed for the 1.8L engine.
|
So is the solenoid for the fuel pressure regulator used after this swap? If not, can I repurpose the signal wire to control the vvt solenoid?
|
There is no solenoid for the fuel pressure regulator. The FPR is purely mechanical
|
He means the hot start pressure up solenoid found on some NAs.
I suppose you could, but with the other rewiring also required with the swap, I don't see the benefit. |
Originally Posted by Ben
(Post 1221488)
He means the hot start pressure up solenoid found on some NAs.
I suppose you could, but with the other rewiring also required with the swap, I don't see the benefit. 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. |
Originally Posted by Ben
(Post 1221488)
He means the hot start pressure up solenoid found on some NAs.
I suppose you could, but with the other rewiring also required with the swap, I don't see the benefit. Also, what is the best way to route the crank position sensor wire? |
Well if he's following this swap and using a standalone, the ecu wont be controlling that noid. I'd go ahead and use the wiring.
|
You won't be able to "tell" it to use that pin, but you could crack open the case and rewire the VVT output to that pin.
For the Reverant MS3 I am buying I am just going to run an extra bundle from the DB37 to the bay with VVT, VICS, VTCS and injector 3/4 in it. |
Originally Posted by Ben
(Post 1221488)
He means the hot start pressure up solenoid found on some NAs.
I suppose you could, but with the other rewiring also required with the swap, I don't see the benefit. |
All times are GMT -4. The time now is 10:42 PM. |
© 2024 MH Sub I, LLC dba Internet Brands