Ryan_U

I bought a car with a Vitesse piggyback and chip. I'm in process of sorting things out and I have a couple questions. The chip has a 4 dip switch selector. On the DME, it is written to set it to on-on-off-on. What map would this be? How do I set it to map 0 for testing? Also, I was re-wiring my wideband sensor and there is a wire that goes to the piggyback's green/yellow wire. I beleive it was from my wideband output and but I'm not sure. Why would I use the 0-5v signal wire and not the narrow band wire for the Vitesse piggyback? The wideband is an Innovate LC-1.

Thanks everybody.

mharmon944

you are better off calling John at Vitesse and having him email you the operating manual. He's a super nice guy and should be happy to help. I've bought 2 of his units (1 for my S2 and 1 for my 964 motor) and he's always been very helpful with questions.

shortyboy

do not touch the dip switches, they should be left as is. since you have the smt6/smt8x piggy back, connect you laptop via serial/usb adapter, run the power perfect program and load the 951 blank map. this is all assuming the previous owner left you with the instructions, installation cd and communication cable. once youve loaded a blank map, check your DME and set the FQS to 0 ( search the forums how to do so). the reason for using a narrow band input opposed to the wide band is because the SMT6 air fuel raition input only reads 0-2v and not 0-5v. Im in the process of trying a voltage divider circuit that might solve that problem, I also have a 0-5v wideband that I want to hook up to my SMT6.I would highly suggest you contact Joh at Vitesse, he has been a great help, especially when I have purchased alot of 2nd hand products ( though some here may say different ) .

BReif61

As someone who has been in your shoes (buying into a SMT car), call or email John. It will eliminate a lot of the headaches.

Ryan_U

I have emailed John a couple of times but he is unable to help me because I am a not the original buyer and the former owner didn't have the software or instructions. He isn't replying to me anymore, so I am out of luck on that end. I don't blame John for not supporting second and third buyers. Just wish I had the instructions and software to figure some of this myself.

The guy who installed it in the first place is a member but he can't be reached anymore (email or PM deactivated) so that is a dead end there too.

The Innovate LC-1 A/F gauge was not wired correctly so I'm wiring everything back up but noticed that the green/yellow wire from the Vitesse Piggyback was connected to the brown wire of the Innovate LC-1 gauge (which is the wideband wire). The brown wire of the LC-1 also goes to my digital gauge so I would beleive that it is 0-5v unless it can be adjusted. All this might explain why I am so rich and backfiring.

I'll put the dip switches back to the original position... I tried Off-On-Off-Off Hoping that was position 2 but I'm probably all wrong (must be binary and that is position 13). It would explain why the car no longer starts with the new dip switch position.

Ryan_U

Put the dip switchs back and the car starts. The a/f gauge is also wired properly now and I am finally able to see what I am running. At cold idle I was at 10.4 and when I hit the throttle I get in the 11.5 - 12 range. Idle is very smooth.

BReif61

What's your warm idle AFr?

dillon410021

idle should be around 14.7 once warm, close to that cold(mine will go rich for a bit then come back to 14.7)

BReif61

Does your Innovate have any logging capability? That is one area I felt my SMT is lacking in. The PO of my car used a Zietronix WB02 and that logs; it's been a great help.

Ryan_U

I am not able to do a warm idle test because the car is parked in the garage and I dare not open the door since it is -39° with the wind chill outside. I have the strange feeling that my Piggyback taps into the wideband sensor through the green/yellow wire but the signal is 0-5v and the Piggyback I think needs 0-2v. So even the Piggy back is seeing the car as too lean since it is at over 2 volts and then richens the fuel map. Does the Vitesse Piggyback need the a/f sensor? I guess rich is better than poor...

Ryan_U

Read up on the Innovate LC-1 A/F sensor and I can program the second output to any range I want. What I need to know is what values does the Vitesse Piggyback want? I can program that the output will vary in a linear fashion between 0-2v but what does 0v need to represent and 2v?

Example: Settings in software 0v = 7 a/f ratio; 2v = 22.3 a/f ration ... Therefore 1v = 14.6.... Is this what the piggyback wants to see?

StyleLab

Search my posts, I have the same setup as you. The po likely wired the wb to the 0-5v engine temps input on the smt to log wb afr. All the translation formulas should be in my previous posts.

StyleLab

I can check the color coding when I get home if you can't figure it out

Ryan_U

Thanks StyleLab. I spent the evening finding the dataports for the Innovate LC-1. They were hidden behind the radio. I had to remove the center console to access them. I ordered a USB to DB9 adapter and downloaded the programming software from the Innovate site. I'll finish wiring everything up soon but for now I just received my Porter Cable 7242xp so I think I will polish the car this weekend.