I searched and didnt really find a direct answer, im collecting the last few pieces of my 350 swap (ESC, Chip, Injectors and fuel pump) and i need to know if i can use a 350 TPI ESC on my TBI?

 

Anyone?

 

quoted from http://sethirdgen.org/tpi1.htm
thanks google :wink: took me about 20secs to find this

 

Sure can. This will be from the earlier MAF TPI vehicle (the SD TPI modules are in the ECM). For what I consider the best ESC module get one from a CCC V8 Camaro or Firebird. From either the 305 or 350.

RBob.

 

So i have one person saying no and one person saying yes....lol from what your saying as long as its from an earlier TPI vehicle, which would be MAF(giving it an external ESC) i can use it?

Say i pulled one from a 350 TPI GTA, that would work correctly on my TBI?
And what is a CCC camaro or firebird? Ive never heard of that?

Thanks, im just trying to understand this down to the dot, im not very familiar with this kinda stuff just yet.

 

The TPI MAF f-body knock sensors and ESC modules are 100% compatible with the f-body TBI systems. The knock sensor (KS) will measure about 100K ohms resistance, where the SD knock sensors are about 3.9K ohm resistance. The SD KS will work, however, they tend to produce a constant low level of reported knock.

Say i pulled one from a 350 TPI GTA, that would work correctly on my TBI?

As long as it is a MAF car it will work. I'm not sure if you are speaking of the knock sensor (KS) or the ESC module. If it is the KS measure the resistance to double check the application. The ESC module is plug & play. Same connector, same functionality.

And what is a CCC camaro or firebird? Ive never heard of that?

Computer controlled carb, the electric q-jet setups. The ESC module uses a 4-pole filter instead of a 2-pole on the newer models.

RBob.

 

i was told that the esc and knoxk sensor is different from a 305 and a 350. as for using one from a tpi, i have no idea. when i did mine i used one from a 90 caprice with a 350 tbi

 

Hmmmm........ so you're saying that I could pull one from my 1984 Z28 parts car and it "would/might" get rid of the "false" knock we talked about in the other thread where you said the newer modules were more prone to filter less?

I hope you make sense of that...lol

Thanks.........DM

 

To some extent this is true. Although when looking at certain ESC module apps it isn't true. I've found more deviation in the ability to detect and report true knock in how tight the knock sensor is torqued then in the selection of the particular sensor.

RBob.
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A good possibility. As long as the parts car ESC module is factory original. Do I recall correctly that the reported knock may be from driveline slack being taken up?

RBob.

 

Thanks you really cleared that up for me, Ive been looking for one for quite awhile and didnt know if i could get one from the classifieds on here, quite a bit more 350 TPI cars get parted out on here than someone who has done a 350TBI swap, and sadly the JY's around here are well picked over and they always rip out the engine, and as far as i know on most trucks and cars its located near the Throttle Body as opposed to the drivers firewall like our cars because i havent had any luck finding one myself.

 

[GUOTE]
A good possibility. As long as the parts car ESC module is factory original. Do I recall correctly that the reported knock may be from driveline slack being taken up?

RBob.[QUOTE]

Yes sir you are correct. I'll check to see what modules are on the cars.

Thanks........DM

 

So how exactely would you be able to use a early 3gen ccc module on a tbi when the pins are different?
from what i understood from this thread, the 100k are the better esc sensors, but the ccc modules are filtering the knocks better.

 

I haven't found any differences in the ESC module pins, or pin-out. I've used ones from the early turbo Sunbirds (it ran a C3 ECM), early 3rd gen CCC cars, to Olds CCC setups.

The 100K sensor is not necessarily better then the later 3.9K sensor. It is that the output impedence is a better match for the external ESC modules. It is also the proper sensor for those vehicles using an external ESC module.

The 3.9K sensors are that value to match the ECMs malfunction diagnostic routine. Those ECMs actually read the resistance of the sensor to prove out the wiring.

Using a 3.9K sensor with the latest 350 ESC module (HKR) has the module continuously reporting knock. Low levels, but the counts keep on going.

RBob.

 

so is the 100k used with the external module or the 3.9k? i measured my new KS resistance at 100.5k, is this ok for the 89 tbi? i cant quite figure out which years/systems were using which kind of KS..
when there is no external module, does it mean the ecm does the esc handling?

 

The 100K sensor is to be used with external ESC modules.

when there is no external module, does it mean the ecm does the esc handling?

In this case the ESC module is internal to the ECM. It is mounted on the MEMCAL. There is a picture of it in the sticky's on the DFI & ECM forum (here at TGO).

RBob.

 

thanks. on thirdgen, one can really learn new useful stuff every day