I read this somewhere else & I recollect this incident. I was in this car mod shop owned by my friend. He basically does all sort of things like free flow, aftermarket filters, CAI, etc.
I was chatting with him when a Vista owner came by & asked him about K&N filters & my friend told him that he would not try any sort of such mods in the Vista. The owner left, understandably furious. Then our conversation followed, starting with me -
Yaar, why you dint give him the filter?
Dude, its a Vista with the TDi engine.
So? A filter is a filter... What's so great?
Dude, we wont do any performance mods on a TATA.
But why?
Ok, think about this. Why do you think Pete's (tuning boxes) which makes boxes for almost every model does not have a box for the TATA engine - Dicor or TDi. It has a box for the Quadrajet engine only, which is made by FIAT as you know.
Hmmm, why is that so?
Every good engine is made to close tolerance levels, they can withstand the higher stresses caused by these mods. But TATA... in the attempt of making a cheap engine, they compromise on the quality & when any sort of aftermarket mods are done, these engines simple cannot withstand that & some or the other part goes kaput.
Are you sure? You mean nobody would touch a TATA engine for mods?
Nobody who has been in this business for long would do that. If its a Vista with Quadrajet engine, then no problem. But if its the TDi or Dicor, then chances of some or the other failure is very high & then the onus comes on us as we did the mods. The owners claim that we damaged the engine. Hence, we refuse doing any performance mods on a TATA unless it has the multijet engine. We dont advise customers to tamper with the TATA engines. Especially a big NO to tuning boxes.
After this, I searched on Pete's & indeed they dont have tuning boxes for TDi & Dicor when they have for Maruti, Hyundai, Mahindra, Audi, BMW, etc.