Delco and variable valve timing

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Delco and variable valve timing

Postby lofty » 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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Re: Delco and variable valve timing

Postby antus » 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!
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: Delco and variable valve timing

Postby Dazza92VP » 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

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Re: Delco and variable valve timing

Postby jenko » Fri Jan 31, 2014 7:32 am

I have done it on a toyota 5valve using the ac output switch

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Re: Delco and variable valve timing

Postby festy » 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.

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Re: Delco and variable valve timing

Postby jenko » 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

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Re: Delco and variable valve timing

Postby antus » Wed Feb 12, 2014 1:00 pm

you can post it in the custom tunes section, and note details about the car.
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: Delco and variable valve timing

Postby jenko » Wed Feb 12, 2014 3:11 pm

posted in viewtopic.php?f=7&t=140&p=39909#p39909
as azip file and with some pics

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Re: Delco and variable valve timing

Postby antus » Wed Feb 12, 2014 6:21 pm

Cool thanks for that, looks like a fun machine :thumbup:
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: Delco and variable valve timing

Postby barana » 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.
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