D6B On Dfz Management?

[kachel 5]

Is it possible to run a d6b engine on dfz management? I want to put the d6b in my CTI. I guess i need to change the flywheel from the dfz to the d6b engine? Anything more?

[Type-R 3]

Wouldn't it be better to swap the d6b head on to the dfz instead?

[welshpug 1,661]

It will run, definitely needs the flywheel if your ecu uses a crank sensor, swap any other part which is different, dizzy etc.

 

the map ob the ecu will not be ideal however, given the not insignificant power differences due to camshaft profile and compression ratio.

 

the best approach would be to use the D6B wiring loom and complete injection and ignition system.

[petert 588]

Yes, it will run fine. I've tuned DFZ engines with 10.5:1 and 280 deg cam timing. Ideally you need to rework the dizzy centrifugal advance however. Don't be greedy with the static timing. Keep it at 10-11 deg. BTDC. DFZ doesn't need a trigger flywheel. It's regular Jetronic. You might be thinking of DKZ or DFW Motronic versions.

[kachel 5]

Thanks all! So i can use the wire loom of the dfz for the d6b engine because there both jetronic? I should use the complete ignition of the dfz and keep the static timing at 10-11 deg?

 

Or is it beter to use the d6b head ons the dfz Block?

[petert 588]

D6B head on DFZ block is the best option but it gives 10.8:1 from memory. Thus you'll need good fuel. You should use the D6B dizzy.

[kachel 5]

Would RON 98 be sufficient?

10.8:1 would be good enough for a sharper camshaft? (in case of putting the d6b head on the dfz block)

Out of curiosity, why would I be needing the d6b dizzy?

[petert 588]

Sharper? I think you mean fatter. Yes.

 

I'm not sure if the D6B and DFZ dizzy are the same part. I do know that the centrifugal advance comes in very early on the DFZ and results in pinging around 2200-2500 when you increase the CR significantly. Thus the need to keep the static timing conservative. Ideally you'd regraph the dizzy so the advance comes in later and ends earlier, so you could run 15 deg static. A trip to H&H would solve the problem.

[wicked 103 3 Cars]

The D6B and DFZ dizzy's are different.

[Henry Yorke 269 3 Cars]

There is a difference in the AFM and ECU between the DFZ and the D6B as well.