Delco and variable valve timing
Posted: Sun Dec 02, 2012 11:19 pm
Can the delco 808 be used to switch on and off things at specific revs such as variable valve timing?
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Delco and variable valve timing
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Re: Delco and variable valve timing
Posted: Sun Dec 02, 2012 11:22 pm
on an off at certain revs yes, see flex tables. I dont think its been done for variable valve timing yet, but I would be very interested to see the results!
Re: Delco and variable valve timing
Posted: Sun Dec 02, 2012 11:30 pm
wouldnt be hard if its just as simple as the falcon 6's variable cam timing its just a solenoid that allows oil pressure into the cam gear phaser and shifts the cam when certain rpm is hit setting up an actual multi staged cam timing tho thats a bit harder
Re: Delco and variable valve timing
Posted: Fri Jan 31, 2014 7:32 am
I have done it on a toyota 5valve using the ac output switch
Re: Delco and variable valve timing
Posted: Sat Feb 01, 2014 9:46 am
The Motronic ECUs I play with do VVT, but to cater for the VE difference when VVT is enabled it uses a second set of fuel and spark tables for VVT on/off.
If VVT was just activated at a certain RPM then you wouldn't have to switch maps but these systems used a RPM x load table for VVT activation control (like a flex output) and a second one for VVT deactivation (to give some hysteresis).
If you used a flex output to switch VVT but also hooked the MAP A/B wire to the VVT solenoid, you'd have a similar setup to how Bosch did it.
If VVT was just activated at a certain RPM then you wouldn't have to switch maps but these systems used a RPM x load table for VVT activation control (like a flex output) and a second one for VVT deactivation (to give some hysteresis).
If you used a flex output to switch VVT but also hooked the MAP A/B wire to the VVT solenoid, you'd have a similar setup to how Bosch did it.
Re: Delco and variable valve timing
Posted: Wed Feb 12, 2014 9:33 am
no need for second map table just switch the vvt at certain rpm and map the ve to suit I can post the kal 3 tune if i can find where to post it
Re: Delco and variable valve timing
Posted: Wed Feb 12, 2014 1:00 pm
you can post it in the custom tunes section, and note details about the car.
Re: Delco and variable valve timing
Posted: Wed Feb 12, 2014 3:11 pm
posted in http://pcmhacking.net/forums/viewtopic. ... 909#p39909
as azip file and with some pics
as azip file and with some pics
Re: Delco and variable valve timing
Posted: Wed Feb 12, 2014 6:21 pm
Cool thanks for that, looks like a fun machine 
Re: Delco and variable valve timing
Posted: Sun Jan 28, 2018 1:47 pm
My question is, With a Vct setup as Festy described, Can you vary the Injector timing to match the valve opening and closing events? I know you dont have to, But COULD you. If you did, How would you do it, I presume the vs+ delco would read its cam angle sensor and adjust? Would it chuck a hissy fit if it saw there was a MAJOR variance between cam and crank sensors shifting allover the place? And if it did it with no problems, how would it 'Adjust smoothly' ? I remember reading something about vt map transitions as used for factory lpg engines.Looking forward to reply, Barana.