delcowizzid wrote:What sort of issues do you have with how it runs
It actually runs well, but its not like a stock tune so it has some quirks.
First, Antus- I did do the math for the injectors and they are set up well. I forget how I connected to the Northstar crank sensors (there are two) but I did use them, and I use the stock coil pack and ignition modules. I also run a knock sensor, and interface that with an external knock filter. The knock sensor is definitely not tuned to the engine, (but its better than nothing I hope) - I used a similar displacement one but of and SBC - 305 I think. For VSS I use a GPS pulse generator, works great except in long tunnels.
The timing table is pretty well an imitation of the OBD2 table but in the 7165 format - that was easy.
The VE table is an interpolation of the stock OBD2 table and is tuned well enough - that was a chore.
So what does it do? These are some.....
Stopping quick at a light without allowing it to slow down easy will often cause the RPM to hunt up and down - a blast of throttle past the reset setpoint value will settle it down.
I have the A/C working on the car and at an idle the compressor clutch will engage and disengage pretty well seamlessly with the expected rise in RPM. But if you have the A/C on and the compressor is engaged when you come off a highway and stop - be prepared for an immediate stall, so i have to shut the A/C off before coming off the highway.
It runs very rich if I start it on a cold day - I know this is the cold temp VE modification chart, but how much richer is still to figure out.
The idle is not very steady - it wanders up and down 50 up 50 down.
Driving at low speeds in low gear it bucks when the idle searches.
Defco ends a bit abruptly when you slow down enough that it comes off - feels a bit like you let up on the brake a bit.
All these are not a problem on the highway or on the track. It makes good power and is fuel efficient if I keep my foot out of it.
Maybe I just need to download a bunch of tunes to see where a lot of these variables are for other engines? It would be so nice if I could use a close OBD1 stock tune to use a reference. Most of the OBD2 Bin I used for a source has different variables.
Thanks for looking, reading and offering your input - its much appreciated.
From what I gather, I am the only one running a Northstar in OBD1 on a 7165. Unfortunately.
Cheers,
Dave.