project C4

delete

BBagman

Are you interested in selling the Doug Nash? If so PM me

rodj

Rich B.

Very nice conversion!

I see you have the C4 DNE speedometer signal generator in position - did the speedometer drive gear line up with it correctly???

What did you decide on for a 'shifter'???

Rich B.

IIRC from my conversion, the speedo sensor also feed signals to the ABS and the ECU...as well as the speedometer & digital dash...

Roger at Speedometer Solutions might be able to help you out...He came up with a solution for my conversion!

383vett

Looks great!

Rich B.

Exactly the opposite of my conversion. I went from the DNE 4+3 to a 4-spd trans w/cable speedometer actuation. I needed a cable operated signal generator.

I'm no expert, but here's what I understand happens...Every time you start the car, the ABS goes through a test cycle. The first part is electrical; the second part occurs when the car reaches 4 mph, when the modulator valve test is run. If there is no signal from the speedo/signal generator, then the test is not conducted and the ABS remains inoperative. This is more thoroughly explained in section 5E-3 & 5E-4 of the FSM.

Normal brake operation "remains fully operational"...

Rich B.

Have you written/spoken to john_leahy@autometer.com about this??? According to John (for my conversion) "While our [AutoMeter] #5291 [pulse generator/sender] would physically fit, it *would not* drive the factory [C4] computer/cluster/etc. The signal is a square wave (vs your factory since wave) and the pulse count is far too high from our sensor as it's a high-end, high resolution sensor." That was in response to my using an AutoMeter pulse/generator to send the signals to my C4 digital dash/EFI/ABS/ECU.

If I understand you, you're going to try using the C4 sender to drive an AutoMeter gauge/cluster??? I would check with John first to make sure it will work...(You might need their sender/pulse generator)...

rodj

http://tpiparts.net/inc/sdetail/10956/7586
Also do same for later ECM requiring 4000 pulse VSS input

Rich B.

Here's a pic of the signal generator (in foreground) that Speedometer Solutions provided...



It works great! No jittering, no error codes, speedo & odo read correctly, ABS tests OK, etc. I didn't like the idea of it being hidden under the car right on the trans, so they made me up a 48" cable extension and I fabricated a bracket to mount it in the engine compartment...