I've got a SD TPI (7730) swapped 93 c1500. When I first made the swap, I ditched the 4L60E for a 700R4 and took it to be tuned in San Antonio, but that is many moons passed. I had aspirations of eventually moving to OBD2, assuming that someone would figure out a way...and along that line of thought, went to a 4L80E using the US Shift "1" controller (which I hate...I want my TV cable back, damnit) as a stand in. Recently, I've begun to suspect my injectors are leaking, and leaning toward a new set....but my tuner put larger injectors in, and I simply do not remember what size they put in. So I called them up and asked about switching to OBD2, getting the harness modded, and driving it back down for retuning. Well...OBD2 is apparently not an option, they no longer do OBD1 tuning, and it's been long enough since my tune that they no longer have records for me. So not only do I not have a tuner now, but I don't have access to the final tune, and no easy way of figuring out what injectors are in use.

So, I guess I'm stuck with the 4L80/stand alone controller, unless there's someone out there that knows otherwise. But I still have an injector issue that's getting worse, and I've made some minor changes that need to be accommodated. So I guess it's time for me to venture into tuning. I know Moates used to offer a package for OBD1, and Tuner Cat still does. Now I see the EBL P4, and it is very appealing. It appears to be out of stock, and I'm not sure if that is a temporary thing, or when new stock might be available.

If I understand correctly, the EBL is basically a flashable version of a 7730, and Tuner Pro is the preferred software for tuning it. Tuner Cat is software used with additional hardware that provides a way to burn a prom instead of flashing. In my case, I'm not tuning for a new project. I need to adjust for long tube headers...change the unified AC / temp trigger that used to run my single fan, to trigger a pair of fans independently ... revisit some other conditions like idle RPM with AC running, etc. So I'm thinking that the tune I currently have is pretty close, and it seems like if I wanted to move to an EBL, that I'd need to also have a way to get my active tune off the memcal and onto the EBL...or is the EBL different enough to prevent that from working? Does this sound like I need Tuner Cat to harvest the current tune, or is there another way...?

I assume there are folks out there that can be solicited to tune this, and since the EBL is a flash, email exchange of logs and tunes can take place...or have I misunderstood?

 

Yeah, I too was looking to potentially upgrade to a EBL on my 7730, but (as of last month), RBob was unsure on when they would have those back in stock when I asked him about it.

That said I'm also curious to know the answer to your question about how much of a 7730 tune is transferable to the EBL.

Are there any markings on your injectors? With Bosch-III's for example, the Bosch P/N is molded into the body. Maybe a photo of them?

 

lol... this always makes me laugh. Most shops say this as if the secret to OBD1 tuning is in some time locked vault privy to only NASA, or some time traveler lol. It's pretty self explanatory. If you already have the electronic transmission and controller you'd be foolish to go back to a 700-R4. It's not the matter of getting the EBL to work with the e-trans, you're just tuning your shift points independently to where your powerband wants to be shifted. Like a manual trans, only controlled by a separate ECU and not your foot. Pull a part number from one of the injectors so you know what you're working with.

- Rob

 

If there are markings on the injectors, they can't be seen while installed. That was the first thing I did... They're pretty generic looking...silver with a black/drk grey top. I'd just yank em out and send them in to get serviced, but I really can't have the truck down for another couple of weeks right now. Just spent 4 weeks with it down while replacing the AC, which turned into a dash replacement too...nothing I do can just be simple, I guess.

The trans was a can of worms for me. I'm really picky about a good shift. I don't want to feel it shift at all if I'm cruising, and I when I lean on it, I want a crisp bump, not hard surge-shift. I like a chirp if it's WOT...but only at WOT. Most of the guys around this area have some kind of home-grown, hillbilly, "hold my beer" approach to how hard they can get a shift to occur, which is great if you want to crack the dash or the windshield, but notsomuch if you're looking for precision. And this outfit came well-recommended - perhaps even by some on this board, so I drove a couple of hours to the shop, repeatedly, until I finally just gave up. I was pretty erk'd. The controller would be 'ok' if it weren't for the violence of the up/down shifts. It just makes it feel like the adjustment range is too course. Not to mention, the 4L80 brought a really noticeable parasitic draw with it. It's too bad, because I really prefer the 80's ratios over the 700's. If I could still get a TCI streetfighter 700 for $1500 it would already be in...may end up doing that anyway.

But for now, I just need to get a handle on the tune, so Im hoping the EBL will easily accept my existing tune, even if I have to get Tuner Cat to 'collect' my tune first.

 

I wouldn't worry about your current tune. Just start off with the proper base Bin and work from there. You can take highlights from your current tune and apply them, but its not needed. EBL-P4, Flash in Bin closest to your setup, run an immediate VE Learn, and watch which way your injector percentage goes in relation with Learning stoich. Obviously it will be Richer when starting off since your tuner upgraded your replacement injectors, so when 128 INT/BLM is realized on the average, the percentage variance from when you first started up until that point should tell you approximately how much larger your newer injectors actually are, if they even are...

- Rob

 

If you wanted to bide your time until the EBL becomes available again, you could get into chip burning pretty cheaply, just to get your truck back into good running order.

PROM programmer + a couple of chips + Tunerpro (free download) and you'd be good until you can buy an EBL. If you're serious about the EBL, then I wouldn't do the Ostrich-style PROM emulators and all of that at this point.

https://www.ebay.com/itm/26638262946...Bk9SR-bfu7bEYg

https://www.ebay.com/itm/29205310915...Bk9SR6qCwrbEYg

My strong suspicion is that your tuner probably didn't mess with anything relating to the injectors, except possibly the flow rate constant. In which case, Delphi injectors are (from what I understand) good hassle-free replacements. They're a little on the pricier side, but they supposedly match the stock injector characteristics most closely. The Bosch-III's are also really good (I run them myself) but they typically require some additional tuning on other parameters to get right. Not the end of the world necessarily, especially if you're getting into the tuning anyway.

 

I have the US Shift quick 4. With it you can program exactly what you want for shifts. You may want to consider just uprading from their 1 to the 4-it's a huge difference in programability.