Performance Coils

[FSETH]

Originally Posted by JCL

No thanks. Everyone is entitled to their opinion, but mine is that selling a chip to tune a modern naturally aspirated vehicle is essentially a scam.

Yeah, you are not going to get much HP out of a chip/ecu flash for a modern N/A BMW engine. Some will raise the rev limiter and remove the top speed limiter as well though.

[m5james]

Originally Posted by JCL

No thanks. Everyone is entitled to their opinion, but mine is that selling a chip to tune a modern naturally aspirated vehicle is essentially a scam.

I think there is always a little wiggle room left just to be on the safe side, so I don't think it's a scam. I'm not sure what years you consider to be modern, but my 91 M5 came with 315hp stock, yet the chip I have bumped it up to 340. That sounds like a lot for such a simple chip, but it was literally a night and day difference on the M. My bike has software as well, and it's a huge difference. As for the X, the gains are only 10hp or so, which isn't huge, but probably noticeable nonetheless. IMHO, about the only scam here really is $$Dinan$$ and their pricing on parts, but as I mentioned, I don't doubt that there is always a little wiggle room left in software tuning from any stock ECU, BMW or otherwise.

[sprocket1200]

no wonder you don't mind typos...

[m5james]

If it works in my favor....

Seriously though, I'd be calling all these retailers anyways just to ask questions before I throw $200 plus at anyone.

[Zulu95]

I put new OEM coils in just before she turned 60 and noticed a slight improvement in most respects. As the coils have a habit of giving trouble I thought it was most likely to the new units having new insulation that was not in the process of breaking down. I was just going to change the rubber boots but found a deal that included coil packs and boots what the dealer wanted for boots only.

[m5james]

On the 3.0, I'd only go FI and never look back.

[Weasel]

What I would be looking for in "performance software" for my X would be activating the vanos earlier under a bit less load, slightly tweaking the spark timing advance, slightly tweaking the fuel map (and I mean not by too much on that one) and removing the top speed limiter (like I ever need to go over 155mph anyway)

Not all tuners cover all those areas, and most mainly change fuel trim and higher rev limiter... I would rather the timing and vanos changed for some low end results I feel in daily driving.