I think my idea might work? Red / Blue LS PCM ~ MPFI similar to TPI ~ Custom built the Crank Position Sensor (CKP) was less expensive than the EFI Connections crank position conversion. Custom built my own harness. TONS and TONS of HOMEWORK!!
dave w
I think my idea might work? Red / Blue LS PCM ~ MPFI similar to TPI ~ Custom built the Crank Position Sensor (CKP) was less expensive than the EFI Connections crank position conversion. Custom built my own harness. TONS and TONS of HOMEWORK!!
dave w
That is some ingenious R&D !
While I have no doubt you enjoyed the intellectual challenge and creativity, most people don't have access to the necessary precision equipment to fabricate the external reluctor ring to the necessary tolerances.
Also, that setup while being highly creative, is also completely external and unprotected.
For the average person the least expensive / complicated route is:
- purchase a 4x CKP reluctor from GM (less than $15) - was used on the 5.0 & 5.7 Vortec engines from 1996 to 2002
- purchase a billet timing cover from EFI Connection ($310) - money well spent (these won't leak when used on a SBC)
- you could try fitting the plastic (supposedly single use) Vortec timing cover ($50) - but the mating surface is slightly changed compared to a traditional SBC - quite a lot of silicone is required to prevent oil leaks
- use a 1996+ Vortec harmonic balancer - or machine the snout of the existing SBC balancer the thickness of the 4x CKP reluctor ring
- use a 1996 to 2002 5.0 or 5.7 Vortec distributer (an upgrade to an aftermarket Vortec style distributer is also money well spent - the OEM ones are mainly made of plastic)
The base tune would be best from a 2001 or 2002 V8 Vortec van, but would end up being a completely custom calibration given the TPI intake, injectors & TB, and the SBC cylinder heads & cam.
This doable on a modest budget, but obviously not doable on no budget.
Thank youOriginally Posted by Buzz
Agreed, but the sensor is just as equally unprotected like the pulleys, belts, hoses, and adjacent engine components. The design is not an inferior flying magnet design. The factory Vortec CPK sensor is used in this design, which is a very robust sensor, and unaffected by oil, dust, moisture, and road grime buildup.
dave w
Absolutely no criticism intended - awesome piece of work on your part.
Just like every tool has a best use, so do parts. Your setup should work over the long term on a daily driver or for paved track use.
The OEM setup between the reluctor wheel and sensor face is completely internal - and would be more reliable in a sand buggy or mud bogging application.
For what Dave charges for them it's way cheaper then the other options. I'll be bringing a Toyota 22RE harmonic balencer and pulleys over to him on my next trip to Portland to get one made. Going to GM ECM and DIS on the kids rock crawler.
I'd already thought about the unprotected only since it's an off roader and going to build a shield off the mount to protect sensor from flying dirt rocks. He does not do mud bogging but ocasinally hits mud on trails... so we will see if any mud will interfere? I'm guessing it won't stay in trigger slots long? Not sure about filling up behind sensor?
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Ok guys yaw doing great but lest slow down theres more info that should solve some problems first a little about my self I have in my shop lathe,tig,mig welders and the tools and equipment to build the hook I wear on my left arm are airplane,circle track race cars are repair a bulldozer and I have done all of the above not to sound like a smart ass.but I have been away from autos for a long time so the computer got ahead of me now i am lot.OK see if this helps I have a 5.7 1998 setting here on the floor right now I just took it out of the truck four days ago because could'nt get it to fire a person working with me got pissed and took a pair wire cutter to my wiring including the vats so I put the 88 engine hei and tpi hope to get running with out a pcm except a few sensors a pulse for the injector witch from what I read it can be done with two wires and the trans. control.Sorry guys I didn't mean to write a book
There are many options, but I think the computer you want to use and the engine you want to use will be the TWO MOST important decisions! After you decide which computer and engine you want, then the wiring harness planning can begin. I have harness and computers that are plug and play ready for any of the options you have posted. I can also post the technical information that will help you do the wiring yourself.
dave w
Ouch!
Not sure where you read that and have no idea how to make it run without a PCM?
You have a bunch of mis matched parts and we are trying to figure out how to make it run.
It's a good book!
I don't doubt your capibility in all the above, but when it comes to injectors, spark advance controlled by ECM/PCM and an E transmission? You need the right wires, ECM, sensors and in your case because of E trans a PCM instead of ECM, then programming to make it work. There's no secret magic box we are hiding to make this work.
Your best bet at this time may be Daves offer of a harness, PCM and programming. Making that engine, trans and vehicle work is no small task.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Posting Permissions
Reply With Quote
Bookmarks