I swapped my drivers out and wired it up like the turbo sunbird, but it wouldn't fire. I pulled the injector jumper wires at the ecm and plugged the grounds back in and it fired right up. I took my car on a little trip and it runs great. My only question is how do I know my ecm is running them as peak and hold, or is it running them like sat injectors?
Installed Peak&Hold drivers today
- Thread starter z28camaro
- Start date
leroy
Donating Member
My primitive understanding is that peak and hold is determined by injector driver design. I'm guessing you could study the datasheet for the stock mosfets v. the replacement mosfets and see a difference.
I'll do a little more digging into the turbo sunbird design when I get around to it.
Does it really matter if it runs good and a/f ratios are good?
Jim
I'll do a little more digging into the turbo sunbird design when I get around to it.
Does it really matter if it runs good and a/f ratios are good?
Jim
The reason I care about it is because the peak & hold allows better control for larger injectors at closed throttle conditions. My understanding is that the 2 injector jumpers in the turbo sunbird wiring bring the p&h sensing circut into the equasion. Thats why I'm trying to get it to work that way.
leroy
Donating Member
If you use the stock sy/ty wiring, with peak & hold injectors you can get good closed throttle control. Use quasi-asynchronous fueling and you shouldn't have a problem. Lots of people have done this....well, Nolan has anyway.
I think the Sunbird wiring jumpered the drivers together. The Syclone wiring diagram shows one driver running one bank and the other driver the other.
Jim
I think the Sunbird wiring jumpered the drivers together. The Syclone wiring diagram shows one driver running one bank and the other driver the other.
Jim
SuperStockChamp03
New member
Just changing the drivers will help the idle???
This sounds easy enough.
What drivers should I use.
Will I have to change all my fuel table, in other words, do the new drivers require a lot of tuning?
My Sy ran and idled good at the nats, but I did a little tuning and now the idle stinks.
Why does changing the injector drivers by them selfs improve the idle.
Thanks
Troy
This sounds easy enough.
What drivers should I use.
Will I have to change all my fuel table, in other words, do the new drivers require a lot of tuning?
My Sy ran and idled good at the nats, but I did a little tuning and now the idle stinks.
Why does changing the injector drivers by them selfs improve the idle.
Thanks
Troy
SuperStock, changing out the injectors to low z injectors and then running them peak&hold will help your idle. They have a much faster reaction time and are a lot more stable at low pulse widths. So far from what I have seen people have swapped out the drivers in the ecm and use low z injectors. But they are leaving it wired up stock, so they are only using 1 of the 2 drivers and without the injector jumpers on the ecm they are not using the peak&hold driver controller. Wired up as a sy/ty you would be driving a low z injector with a high z injector signal.
10secTy
Sy-Ty builder and Tuner
Yep you only swap drivers to run the peak and hold injectors.
All I know is that the way I have it now it works great. I had other guys that wired it like the sunbird and they ran into problems and ended up going back to stock wiring. I have my 84's running at pw down to .37 with no problems. They are very stable. I have never had problems running this way so I never looked closer into it.
Nolan
All I know is that the way I have it now it works great. I had other guys that wired it like the sunbird and they ran into problems and ended up going back to stock wiring. I have my 84's running at pw down to .37 with no problems. They are very stable. I have never had problems running this way so I never looked closer into it.
Nolan