MicroSquit Conversion, Giving this a try Options

[Mblizzard]

I am pretty happy with my stock FI. But after seeing some of the setups at Okteenerfest, I thought this might be worth trying.

The stock system is not easy to modify and get things running correctly. I spent a lot of time making minor adjustments by trial and error. While I am not looking for huge HP gains or anything, it is pretty clear that the mods I have could potentially benefit from a bit more precise control.

Going to start with fuel only at this point to get things going and see where it leads me. Any help or suggestions for set up would be appreciated.

[jd74914]

Oops, just read your more recent post and saw that you want to use the coil for timing. Having increased resolution on the crank allows you better engine positioning accuracy so you can tune injection/ignition times better. Different applications, but generally better engine position accuracy results in a crisper tune.

With a T4 engine, the dizzy is driven right off of the motor so timing accuracy is very good compared to most engines. On engines with a belt/chain timing drive, there can be 2-5 degrees (or more) of error depending on engine speed, etc.

[Mark Henry]

Oops, just read your more recent post and saw that you want to use the coil for timing. Having increased resolution on the crank allows you better engine positioning accuracy so you can tune injection/ignition times better. Different applications, but generally better engine position accuracy results in a crisper tune.

With a T4 engine, the dizzy is driven right off of the motor so timing accuracy is very good compared to most engines. On engines with a belt/chain timing drive, there can be 2-5 degrees (or more) of error depending on engine speed, etc.

Well debateable ...crankfire is still not as accurate as many believe, a 2-4 degree variance would still be the acceptable norm. As far as the dizzy drive goes it only becomes less accurate when you decelerate, and that doesn't really matter. The performance gain that most are seeing comes from the advance curve and higher voltages of modern coils.

Same debate as far as sequential and batch fired injectors. The only real advantage of sequential fuel injection is an emissions and maybe slightly better MPG. And this is at lower RPM's, over say 4000 RPM most of this becomes a moot point.

BTW I've been running EFI and crankfire since 2003.

[Mblizzard]

Oops, just read your more recent post and saw that you want to use the coil for timing. Having increased resolution on the crank allows you better engine positioning accuracy so you can tune injection/ignition times better. Different applications, but generally better engine position accuracy results in a crisper tune.

With a T4 engine, the dizzy is driven right off of the motor so timing accuracy is very good compared to most engines. On engines with a belt/chain timing drive, there can be 2-5 degrees (or more) of error depending on engine speed, etc.

Well debateable ...crankfire is still not as accurate as many believe, a 2-4 degree variance would still be the acceptable norm. As far as the dizzy drive goes it only becomes less accurate when you decelerate, and that doesn't really matter. The performance gain that most are seeing comes from the advance curve and higher voltages of modern coils.

Same debate as far as sequential and batch fired injectors. The only real advantage of sequential fuel injection is an emissions and maybe slightly better MPG. And this is at lower RPM's, over say 4000 RPM most of this becomes a moot point.

BTW I've been running EFI and crankfire since 2003.

As I tend to be, I am so far ahead of myself it is not even funny. Just got email that my MicroSquirt was delivered and was left on the front porch. So I am all ready looking at jumping to the ignition and sequential injection timing and I have not even opened the first box yet!

For my engine I think I will be spending most of my time below the 4K mark so the sequential fuel injection is desirable to me but obviously not a requirement.

But I would like to go to a more modern coil set up and have the ability to control my timing. If there is a dizzy based option to control the timing I would be good with that and let the sequential go.

Something like this seems perfect but not sure where to find.

[cgnj]

This is the Dubshop cam position sensor $155.00 Dubshop Ignition
Can do batch or sequential. It is pre-order now. I have it installed and my engine is on the stand. I'll add that to my picture list.

Have we hijacked this thread yet? If so, I'm sorry.

Carlos

[Mblizzard]

This is the Dubshop cam position sensor $155.00 Dubshop Ignition
Can do batch or sequential. It is pre-order now. I have it installed and my engine is on the stand. I'll add that to my picture list.

Have we hijacked this thread yet? If so, I'm sorry.

Carlos

Nope on the hijack. Lots of good information.

Would like to see if this could be done initially for fuel only for around $600. So far that seems possible assuming our time is free.