Would appreciate some tuning advice for new 2056, Having trouble dialing in the AFR Options

[rbzymek]

So I replaced the 1.8L with a SCAT 2056 long block with a Web 73 cam and 42x38 valves. They provided 4 bolt (intake) heads so I could use the 1.8 tin and carry over L-Jet system. The CR is 8.5 and I have an adjustable FPR. The injectors are stock 1.8L L-Ject. I can dial in the idle AFR easily but I get rich 9.0 AFR on very light tip in. I also go lean at higher speeds (>4000). I suspect the static is set too high on the AFM. Any suggestions?

[ClayPerrine]

Go find 4 injectors for a Datsun/Nissan 208ZX, vintage 1980 or so. They are the same as the bosch injectors for a 912E, and work great with the L-Jet system. They are a complete bolt on, no mods needed. Make sure the intake has no vacuum leaks and verify the fuel pressure (28psi at idle with the vacuum hose hooked up) with a gauge. You just need it set to the stock pressure with the bigger injectors.

The 2056 won't kill the AFM from airflow, so you don't need to readjust the flap. Just use it as is. The cam will probably make it idle really poorly when cold, but once it is warmed up, it will run really well.


Let me know if I can be of any additional help.

Clay

[rbzymek]

Go find 4 injectors for a Datsun/Nissan 208ZX, vintage 1980 or so. They are the same as the bosch injectors for a 912E, and work great with the L-Jet system. They are a complete bolt on, no mods needed. Make sure the intake has no vacuum leaks and verify the fuel pressure (28psi at idle with the vacuum hose hooked up) with a gauge. You just need it set to the stock pressure with the bigger injectors.

The 2056 won't kill the AFM from airflow, so you don't need to readjust the flap. Just use it as is. The cam will probably make it idle really poorly when cold, but once it is warmed up, it will run really well.


Let me know if I can be of any additional help.

Clay

Thanks for the advice. This will take some time with the other things going on.
Regards
Ray

[rbzymek]

Go find 4 injectors for a Datsun/Nissan 208ZX, vintage 1980 or so. They are the same as the bosch injectors for a 912E, and work great with the L-Jet system. They are a complete bolt on, no mods needed. Make sure the intake has no vacuum leaks and verify the fuel pressure (28psi at idle with the vacuum hose hooked up) with a gauge. You just need it set to the stock pressure with the bigger injectors.

The 2056 won't kill the AFM from airflow, so you don't need to readjust the flap. Just use it as is. The cam will probably make it idle really poorly when cold, but once it is warmed up, it will run really well.


Let me know if I can be of any additional help.

Clay

Thanks for the advice. This will take some time with the other things going on.
Regards
Ray

Clay,
Wouldn't it make sense to also use a 912E (2.0L) L-Jet ECU on a 2056. It may have a better fuel map than the 1.8L ECU Have you heard if anyone has tried that or is it not required?
Ray

[ClayPerrine]

Go find 4 injectors for a Datsun/Nissan 208ZX, vintage 1980 or so. They are the same as the bosch injectors for a 912E, and work great with the L-Jet system. They are a complete bolt on, no mods needed. Make sure the intake has no vacuum leaks and verify the fuel pressure (28psi at idle with the vacuum hose hooked up) with a gauge. You just need it set to the stock pressure with the bigger injectors.

The 2056 won't kill the AFM from airflow, so you don't need to readjust the flap. Just use it as is. The cam will probably make it idle really poorly when cold, but once it is warmed up, it will run really well.


Let me know if I can be of any additional help.

Clay

Thanks for the advice. This will take some time with the other things going on.
Regards
Ray

Clay,
Wouldn't it make sense to also use a 912E (2.0L) L-Jet ECU on a 2056. It may have a better fuel map than the 1.8L ECU Have you heard if anyone has tried that or is it not required?
Ray

I have never tried it. It may be better, but the 912E ECU is hard to find.