Using TBI knock "board" on '727/'730?

[dyeager535]

I'm sure it's out there, if anyone has a link, I would appreciate it.

Hadn't actually looked at one of the later ECM setups until tonight. Pulled the V6 memcal out, and took the cover off.

Prom portion is easy. Netres I think I've got figured out based on this post http://www.thirdgen.org/techboard/po...66-post39.html (jumper pin 10 to 13).

The knock "board" I haven't quite figured out. Conventional wisdom says the V6 knock setup won't work correctly on a V8. Got it. Not a whole lot of the V8 knock boards I can get my hands on, at least out of cars.

Trucks of the proper vintage on the other hand, are still fairly common. From say, a 1993 350 TBI truck, will the knock board interchange with the '727/730?

Thanks as usual! :)

[dave w]

I've been wondering if a TBI V8 Memcal from 93 ~ 95 pickup would work in a '7730 / '7727 if pins 10 to 13 were jumped together? What I've done, was install a TBI V8 Memcal from a 93 ~ 95 pickup into a '7727 in an attempt to make the '7727 a V8 TBI configuration. I ended up getting a cylinder select error.

dave w

[dyeager535]

Yes, I read a fair amount over on thirdgen (and others) about the memcals, and I saw the same thing that others got, cylinder select error.

But the knock board is completly separate. Is there any reason that a 350 knock board for a truck app would be different than a 350 for a car? I *assume* if the knock sensors are the same, the knock board should be the same, right? I assume that it may very well depend on mask, but from a $ standpoint, it would make far more sense for GM to use the same sensor and board if they could.

Are there part numbers out there for just the knock boards?

Adding info, part number for a 1994 5.7L Blazer knock *sensor* (213-92) is the same as a 1990 5.7L Camaro.

[RobertISaar]

unless the layout of the knock filter changed between the two designs, feel free to desolder and resolder, they should be interchangeable in that sense.

[dyeager535]

Excellent!

[dave w]

I agree with RobertISarr, the knock filter from the 93 ~ 95 TBI (4L60E Auto Trans) should work when soldered / installed into the pin 10 / 13 modified V6 memcal. I was thinking the why not try connecting pins 10 / 13 on the 93 ~ 95 TBI Memcal, which I think will fix the cylinder select fault, and correctly function like a TPI V8 Memcal.

dave w

[RobertISaar]

SHOULD work.......

i mean, it's simpler to test a bridged connection that it is to transplant the knock filters.