1.1.x release for 60-2 Audi V8 with cam synch?

[smurfinator]

anybody got one running that won't blow up?

[GintsK]

I have Porsche 928 V8 with 60-2 camsynced, COPs (wasted mode) on the road. 1.1.27.

[smurfinator]

cool!  Questions:

Are there noticeable improvements in throttle tip in?
Other improvements?

What did you have to change from the 1.0 version?

Why wasted spark on COP if you have cam sync?

THANKS!

[GintsK]

There is improvements. Reason for VEMS was old LH-jetronic.
For good tip-in 1.1.43 or 1.0.78 must be better due improved acceleration enrichment strategy. Car have auto tranny.

This car never ran on 1.0 versions previous.

Cayanes COPs is driven by stepper chip in pairs (only 4chanels). Reason was lack of 2 spare channels: all  FETs used by injectors. No channel for IAC valve and intake manifold acoustic switch plate. So for this I can use IGBT channels equipped with FETs + some protection diodes.

Are Audi use two distributors?

[smurfinator]

There is improvements. Reason for VEMS was old LH-jetronic.
For good tip-in 1.1.43 or 1.0.78 must be better due improved acceleration enrichment strategy. Car have auto tranny.

This car never ran on 1.0 versions previous.

Cayanes COPs is driven by stepper chip in pairs (only 4chanels). Reason was lack of 2 spare channels: all  FETs used by injectors. No channel for IAC valve and intake manifold acoustic switch plate. So for this I can use IGBT channels equipped with FETs + some protection diodes.

Are Audi use two distributors?

THe old Audi v8 (up to '93 in the US) used 2 distributors but I have an ABZ that is 8 COP from the factory.

You have to be using 16 injectors to use up all the outputs (?)  Hilly and I are all wired for sequential fuel and spark, but I have not got my software caught up due to very strange details with the cam trigger and cylinder counting.

[PeepPaadam]

I have 928 S running 1.1.27 and it has stock 100-1 trigger wheel on the flywheel. VAG active COP's, driven by logic-level IGN outputs. No problems whatsoever.
Owner decided to go VEMS after MAF died. Availability is near zero and price is sky-high.

[smurfinator]

I have 928 S running 1.1.27 and it has stock 100-1 trigger wheel on the flywheel. VAG active COP's, driven by logic-level IGN outputs. No problems whatsoever.
Owner decided to go VEMS after MAF died. Availability is near zero and price is sky-high.

THere is SO much power hiding in those old Porsche V8s...  I'm talking close to 500hp with porting and upgrading all the fiddly bits (adding VEMS with full features) 

GREAT car!

[smurfinator]

Oh, rather than make a new thread (hope somebody reads this) 

Can somebody suggest a way for a non-electronics person (me) to test the signal/sync of the cam synch before I try to blow up my engine with it?

It's running in dual mode now, but the cam sensor is all wired up.  Now, here is weird thing:

My TDC timing light test is about 30 deg off.  When I first built this beast, it was dead on.

NO idea what has happened in the interim.  I adjusted the cam timing by about 6 deg and that is all.  My 60-2 wheel has been off a few times, but it is keyed and anyway, it can only move in 90 deg increments with the bolt holes it has.

Very odd.  I tried adjusting the timing constant of course so TDC #1 was dead on and the engine refused to fire at all.

 
 

[rob@vems.co.uk]

Is the sync connected to the VEMS?

[hilly]

What kind of cam trigger wheel do you have???

Is it the unit with the single aperture, or the multi tooth one

If it is the multi tooth wheel then you;ll have to remove 3 of them, I think i sent you a picture a while back of which one.

Hilly

[BrendanC]

There is improvements. Reason for VEMS was old LH-jetronic.
For good tip-in 1.1.43 or 1.0.78 must be better due improved acceleration enrichment strategy. Car have auto tranny.

This car never ran on 1.0 versions previous.

Cayanes COPs is driven by stepper chip in pairs (only 4chanels). Reason was lack of 2 spare channels: all  FETs used by injectors. No channel for IAC valve and intake manifold acoustic switch plate. So for this I can use IGBT channels equipped with FETs + some protection diodes.

Are Audi use two distributors?

I will be doing this on a 2V. You obviously had 4V?

Are you saying there was not enough outputs for 8 injectors and 8 smart coil drivers? (5Volt?)


Any other issues in installation? I was thinking of using CNP Chevy LS2 coils - one per cylinder - these are smart coils as well. Crank mounted 60-2, and one cam synch (somewhere)

[smurfinator]

What kind of cam trigger wheel do you have???

Is it the unit with the single aperture, or the multi tooth one

If it is the multi tooth wheel then you;ll have to remove 3 of them, I think i sent you a picture a while back of which one.

Hilly

It's like yours and I chopped to have one tooth.  Could not get it to run with your firmware, but my timing seems to be of by 30 deg even though it runs fine and wont run when timing is adjusted to be accurate

[hilly]

OK Ben

If you have chopped your trigger wheel to have only one tooth as in the picture I sent you earlier then set up your secondary trigger like this



This then gives you a ignition channel h[2] firing sequence of 0,7,6,5,4,3,2,1

So to get the Audi ABZ firing order of 1-5-4-8-6-3-7-2 set
cylinder 1 to ignition output channel 0
cylinder 5 to ignition output channel 7
cylinder 4 to ignition output channel 6
cylinder 8 to ignition output channel 5
cylinder 6 to ignition output channel 4
cylinder 3 to ignition output channel 3
cylinder 7 to ignition output channel 2
cylinder 2 to ignition output channel 1

This works fine on my ABZ V8 and a number of other installs I have done.

Hilly

[smurfinator]

OK Ben

If you have chopped your trigger wheel to have only one tooth as in the picture I sent you earlier then set up your secondary trigger like this


This then gives you a ignition channel h[2] firing sequence of 0,7,6,5,4,3,2,1

So to get the Audi ABZ firing order of 1-5-4-8-6-3-7-2 set
cylinder 1 to ignition output channel 0
cylinder 5 to ignition output channel 7
cylinder 4 to ignition output channel 6
cylinder 8 to ignition output channel 5
cylinder 6 to ignition output channel 4
cylinder 3 to ignition output channel 3
cylinder 7 to ignition output channel 2
cylinder 2 to ignition output channel 1

This works fine on my ABZ V8 and a number of other installs I have done.

Hilly

Cool, thanks.  Wil' giver 'er a go later in the week after my new stepper chip shows up