I read on a post elsewhere where a guy said he converted his TPI from the old hot-wire style (which required burnoff) to a newer film-type which does not need burnoff. Has anyone here done that? Is there any info on how to do it? Does it require a re-tune of the ECU? A how-to tech article wouldbe great, as it is getting harder to find decent quality replacement MAFs these days.

Opinions?

 

The hot wire didn't really need the burn off either. Just delete it in the tune, or go to the EBL system with a 7730 ECM and get rid of the MAF entirely.

GD

 

http://www.blowerworks.net/

 

There is nothing that needs to be done to convert it. Plug it in and it will work.

What may happen (which happened to me) is a Code 36 for the burnoff not functioning. I have also seen other chasing Code 36. In my case, there was a return signal to "spoof" the computer into thinking the cycle happened. My signal was the right Voltage sometimes when checking and not others.

GD posted the correct options as I found in my research... but I wasn't ready for that as I have other things to sort out. So, I found an OE style Bosch unit with the wire and bought it. No Code 36.

The blowerworks option shown above is also a good option. As you will see on their site, it will require and new .bin file burned to your PROM.

 

I believe the Blowerworks setup uses a generic sensor, and then it radically alters the BIN because it's no longer a voltage based MAF signal. There is some re-wiring of the ECM that must take place as the new MAF signal comes in through a different input, etc. For the money, the EBL system is better as it does away with the MAF entirely (so no flow restriction), and comes with a LOT of other benefits including self-tuning, much faster data-logging, and real-time tuning without burning chips. Although the blowerworks file is floating around out there, the instructions are online, and anyone can build the MAF they use with some tubing, a weld-on MAF plate, and a TIG welder. I still think EBL is a better value for the amount of work it all takes.

GD

 

The Blowerworks replacement MAF is called for the L98. Will it work on the LB9 as well? Didn't the L98 and LB9 engines use the same stock MAF?

 

Yes, it will work on an LB9 same as L98. You will need a custom .bin for your PROM.

 

Yes the LB9 and L98 use the same MAF. Different tuning would be required of course.

But again - DynamicEFI's EBL system is better. Does away with the MAF entirely for about the same price once you consider all the benefits and the EBL is self tuning. No more MAF to restrict your intake either. Requires less wiring, and self-tuning plus a LOT of features for $485 shipped. With the blowerworks you get..... a MAF..... and that's it. Then you have to pay for tuning on a platform literally no one has any experience with, or pay for their e-tuning which is less than ideal because it's not on a dyno. At least with the EBL self-tuning you have proven algorithms doing most of the work on the car. And there's a whole community here that has experience with it. And the owner of Dynamic EFI (rbob) is a frequent helpful contributor on this very forum.

GD

 

Thanks for all the inputs.. The last problem I see is passing smog. here everything gets a visual inspection and if the tech sees anything non-stock it needs to have a CARB number or you fail. Regardless if the tailpipe sniffer says your car is burning clean.

 

Perfect - do the EBL swap, and leave the MAF in place. They will never know because they can't see your ECM. The only change under the hood will be the addition of the MAP sensor using some of the wires that went to the MAF. Easily hidden, and the smog guy isn't going to notice it because it's a stock part for a 90-92 so it's not going to look out of place. Many more modern MAF cars still have MAP sensors.

GD

 

Doesn't CA (and most smog states) lawfully allow an engine swap from same year or newer model in to a car. I remember Nevada had a rule on that while I was living there I think. If you go EBL just run the MAP and say the engine is from a 90-92 etc. Will look exactly stock for those years anyways. Just my 2 cents, to maybe simplify life.