S50 with M50 ecu

[e30s50dan]

Getting ready to put the ol S50 in and question about a 413 red label from an m50.
Will there be an problem useing the m50 413 for start up and testing.??? Don't plan on driving it until I get a TMS chip and injectors/3.5 maf

I've done research and couldn't find the anwser
BTW. There is a red label s50 ecu on eBay but it has the same part # as mine so how the hell does one know what engine it came from short of taking it apart to see the chip

TIA

Dan

[nrubenstein]

It's fine for limited use. Avoid WOT.

[MR 325]

The difference is the chip.

[rThor432]

It will be safe-- I drove my S52 car with the standard 413 for a month while buttoning the conversion up and before I paid for/recieved my TRM chip. I drove it short distances in and around our business park and it is fine if you aren't driving hard/spinning it up.