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Discussion Starter · #1 ·
I'm currently replacing my AEM v1 ECU with a LINK ECU on my 1999 VR4.

Anyone with any experience with the LINK ECU?

I was going to go with the AEM Infinity but my tuner recommended the LINK.

I was pretty set on the AEM and even made a custom crank sensor wheel to use it.

If anyone wants a used AEM v1 ECU, let me know.
 

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Discussion Starter · #4 ·
Thanks for the info guys!

My tuner has experience with the link 4gx and the AEM and recommended the LINK as that is what they have changed to for their race cars. They said support for the infinity will be going away.

They have been tuning and racing Mitsubishis and other makes for about 20 years and I trust their expertise. Plus they will be tuning it and I want them to be confident as I don't want to rebuild the motor. They are always busy and I don't think they will be going anywhere for a while.

I'm getting it tuned for E85 as well.

Didn't know it had OBD2, that's a great feature to have in a standalone.

I'll post more info as it progresses.
 

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Discussion Starter · #5 ·
UPDATE:

I got the LINK ECU installed with necessary sensors and such. Changed plugs, hotwired fuel pump and tuned. Install went smooth.

So far we got mid 300s on pump gas. They started tuning for ethanol and power started dropping when increasing boost. Turns out the rear pre-cat has come loose and starting to turn causing a bunch of back pressure.

Now redoing the exhaust, then back to the dyno.
 

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Discussion Starter · #7 ·
Good to hear you got the Link ECU install done.
Unfortunate about the pre-cat coming loose though. That would ofc also mess up the AFR readings from the wideband, so tuning would also be wacky with that happening I guess...
You have the pre-cats gutted?
I'm running Pre-cat pipes, they do have better flow, and with E85 the emissions will fall nicely into specs even just with a 3" FreeFlow cat.
With E85, just adding timing, and ofc fuel, all else being equal, I have been seeing about +5hp per degree of increase.
Hoping for a good Ethanol tune once you get the exhaust redone.
The only exhaust mod was a Y pipe and Magnaflow 3" cat . I ordered a 3SX rear cat eliminator and will make the rest of the exhaust at my shop. So far planning to eliminate both front cats and use a singe GESI G-Sport 300 CPI, EPA rated high-flow cat (claims good for 500-850ph). It will be 2.5", Y to 3.5", CAT, Y back to dual 2.5". Single 5" round muffler on one side and a valve on the other side to switch between loud and quiet.

Then back to the dyno to redo the gas and E85 tunes.
 
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