build thread for 2.8 carb to chevy tbi.

[Lil-Pony]

kadams can i get the diagram containing this little device

 

[Lil-Pony]

Well time for a long over due update.
Finally secured a complete tbi from WesTN
Thanks man
Just need to collect the rest of the sensor and machine the adapter, and pick up a kickdown cable.

 

[Lil-Pony]

built the heatsink from an old mtx 1000w amp i had laying around that was goes into protect mode on power up. if its good enough for that its good enough for this

 

[Lil-Pony]

picked up the last off the sensors, knock, map, coolant, spare iac, spare injectors, spare regulator, air filter housing, coil, metal fuel lines, and the ign module, also pulled the interior harness that leads to the OBD1 port. just have to machine the adapter plate and figure out a way to convert the kickdown linkage to a cable.

 

[Lil-Pony]

i believe this thread has gone dead. i dont want to pull the carb off my truck just yet, but the gaskets for the tbi i got and the one for the top off the intake have different sized venturi/barrel holes. bout to build my adapter and i just want to know if these gaskets are wrong

 

[GentleRF]

Not totally dead yet. I was thinking about MegaSquirt for the ecu on my 2.3. I already have the one kit which I was planning to put on a Jeep Grand Wagoneer. Why not go for three so I can do the Ranger and the Vanagon. Hmmm. Maybe a 2.3 in the VW...

Rick in East Bremerton

 

[Lil-Pony]

finished the computer aid design.

 

[RICO9]

Looks good. Make sure you've got enough room on the back side of the plate for the TB. What are your plans for mounting the chevy ECM? I encountered a new problem with mine. I have bare metal floorboards in my Bronco and now that summer has hit, This is making the ECM too hot and causing one injector to not fire. I will be relocating mine under the dash or fabbing up some sort of heat sink mount to get it off the hot floor.

 

[Lil-Pony]

If thats the case ill try to isolate it from the metal floor with plastic

 

[cammeddrz]

I suggest that you move the tbi backward on the plate 1/8", doing so will make the throttle cable bracket fit perfectly. on our first one it was centered and the bracket needed to be bent toward the tbi so that the cable would have enough slack to attach.

you will need to extend the plate to be at least 1/8" behind the back bolts (1/4" if you move the tbi back 1/8") maybe more, you'll have to set the tbi gasket on there and see. so that you don't get a massive vacuum leak on the IAC port. if you look at the pic of the one I did, you will see it has a decent sized overhang on the back, this was for that reason. rico did have a tiny (and I mean tiny) bit of plate/hose interference with the brake booster hose. but nothing major.

 

[Lil-Pony]

I suggest that you move the tbi backward on the plate 1/8", doing so will make the throttle cable bracket fit perfectly. on our first one it was centered and the bracket needed to be bent toward the tbi so that the cable would have enough slack to attach.

you will need to extend the plate to be at least 1/8" behind the back bolts (1/4" if you move the tbi back 1/8") maybe more, you'll have to set the tbi gasket on there and see. so that you don't get a massive vacuum leak on the IAC port. if you look at the pic of the one I did, you will see it has a decent sized overhang on the back, this was for that reason. rico did have a tiny (and I mean tiny) bit of plate/hose interference with the brake booster hose. but nothing major.

how is this

 

[Lil-Pony]

this is more like what you built

 

[cammeddrz]

i honestly don't know. It has been like a year. I didn't write any of it down. since you are seeming to want to do this on a cad illustration, I suggest just scanning in a 2.8l TBI gasket, and overlaying it (to scale) and making sure that you have sufficient coverage for the entire gasket.

 

[cammeddrz]

btw if you have this cut on a CNC router or something similar, I suggest cutting several extras because people would love to buy them

at first we bought one that was 3D-printed out of plastic, but the material wasn't strong enough for the threads to tighten up enough to compress the gasket, they just kept stripping. That is why I just made one out of plate aluminum.

 

[Lil-Pony]

I planned on making maybe 1-2 extra, if people want one they need to speak up and ill make even more extra.