Would anyone have any information on this link Turbo controller system. It has a box that has vaccume line connected and then it connects to a green control box...I am h

This has a vaccume line to it and then had a harness thst goes to the injectors, gound,2 unused wires and the original injectors


Picture of the extra injectors

aving trouble finding any information on this it is on a 99 miata with a bell engineering turbo kit the controller connects to 4 extra injectors welded into the intake manifold I have not seen any other pictures of anyone with this set up and want to know is it good or just obsolete with all the new stuff that's available

 

Welcome to the forum, you have come to the right place to ask those questions.

Car appears to be a non-runner, if that a/c pulley is any indication. Have you seen it running? Just bought it? Yes, the world has moved considerably since that setup came on the scene. I think it is fair to say it is obsolete. If you search on here you should find information on it.

My advice is to pull it off, remove the extra injectors and plug the holes.

If you haven't heard it running, then check out the turbo, is still in decent condition?

Then either replace it with a pnp ECU and have it tuned properly, or pull the turbo off too and run it as an atmo car, at least while you work out what you want to do.

 

I did buy it running ....and it did feel good and a week later the gt2560r seized up i have the manifold off of the head the piping on this kit looked bent from a crash when i first bought it but actually looks like it was ment to be like this ....but I do have everything to make it stock again to pass ca smog while I find a replacement turbo...just not sure where to look on this fourm to find information I just find the more popular link info ....but I think I will use a stand alone as soon as i get it passed smog....would there be a benefit to having those extra injectors later down the road....not trying to make alot of power just around 240 ,I don't want to be braking transmissions ...yet

 

These came on the old FM2 turbo kits circa 2005. My buddy in high-school had one, it was a flex having that LCD screen/controller in your center console. His car was fast for the day, -250whp range. Certainly not the worst engine management, probably the best in its day. If it works I don't see why you couldn't run it assuming the tune is good. Might have trouble finding someone to tune it. An upgrade would be nice, but this was way better than the old band aids we used to run. Maybe on par with a MS1

 

do u know if it is just a piggy back unit or a whole ecu ...I have not taken out the ecu to look at it closely but did take a look at it and it looks like a stock ecu. But I know some companies use the ecu box for easy mounting

 

It is a piggyback -- I had one as the first turbo system on my Miata. Bought it in 2001, ran it like that for a few years, later on I outgrew it and migrated away.

The Link piggyback takes two inputs, RPM (through an add-on harness that plugs in between the stock one) and MAP (onboard sensor with a vacuum line) and has 3 outputs. It controls either 2 or 4 aux injectors (depends on kit version, the one above has 4) in batch mode, it has a boost control solenoid, and it can retard timing from where the stock computer put it (by delaying one of the signals via that add-on harness). That's all it does, you have to tune everything manually with the keypad. There is no laptop interface, no way to download/upload tunes, no datalogging, no wideband support, and no autotuning. It also has no trims for things like coolant temperature, air intake temp, etc.

That said, it works better than it has any right to. The biggest downside is that since it is simply supplementing the stock computer's fuel and ignition numbers, you need to tune it pretty conservatively. The stock computer is somewhat unpredictable and if it were to decide to put in less fuel for some reason you could wind up dangerously lean (similar problem for ignition timing). I spent a while messing with mine, best I was able to accomplish with it was 220-ish at the wheels (dynojet numbers) using 95 octane and a 2560.

The other issue with that kit specifically is that the injector rail is cantilevered out in space and the vibration of the engine tends to crack the tabs that hold the fuel rail to the welded-on mounting posts. One person on this forum had at least 2 catastrophic failures of those tabs with fuel gushing all over the engine (fortunately no fire). Mine did crack, but never leaked. Personally I would not trust that fuel rail, and without it the Link piggyback is kind of useless.

Got any pics of the hot side? That kit was sold in a CARB-certified form, with a special manifold that relocated the turbo forwards so that the CA-emissions precat could be mounting in the downpipe. There was also a non-certified version that used a standard FM/BEGI manifold and downpipe.

Odd to see a stock crossover pipe on the throttle body -- the kit was sold with a standard FM intercooler.

--Ian

 

The way u are explaining it is exactly what I was thinking it does. I did call flyin miata and the guy was telling me it was a standalone.i have red all other years before the 99 had a link ecu .The car was running very well before the turbo stopped ,i do have 99 ca carb legal kit and I just have that cross over pipe on because I am going back to stock till I find another gt2560r

 

Codrus, thanks for the info. Super interesting, I take back comparing it to a MS1. It's crazy how far things have come. My friends car was tuned by a miata shop in Houston and ran great, on a 2560 making 24x whp and the thing was a rocket in its day.

 

Yeah, the NA cars had a plug-and-play Link ECU that went inside the OEM ECU case. There were one or two people who made NBs work with an NA Link, but it didn't have any alternator or VICS control. AFAIK Link never made a plug-and-play for the NB.

I think you may have the exact kit that I sold, over a decade ago. As-designed from BEGI the kit had you move the studs from the bottom of the factory exhaust manifold to the big downpipe flange to bolt the pre-cat to it. They'd made my downpipe wrong and so that wouldn't work (I don't remember exactly why) so I wound up drilling it out and using through-bolts instead, which I see in your picture. Small world.

--Ian

 

I called and emailed link and the guy who soldered all the control units sent me the documents that where sent when purchased and got a call from a tech letting me know what he knew....was awesome to get some feedback from the company

 

Damn. That's awesome 👌

 

That is little short of AMAZING!

 

museum piece, remember these things from my youth. with that said, I would swap it for a modern standalone.

 

Holy **** 1992. I just turned 40 and I was 7 when that came out. The first laptop that looks sorta like what we know today as a laptop came out in 1991/2.