Engine/Trany Mods - Curious

bgsquad · #1 04-02-2009, 10:58 AM

Guys, I'm always reading about your mods, and having a stock X, i started to feel the mod bug getting close

but here we don't have much specialized places for good mods, so i am afraid of messing it up...

anyway, that's not the issue... what I was wondering about lately, is the mods some of you do on their engine and trany (dinnan and the like...) so I always wondered how would those mods impact the overall reliability and durability of the vehicle.

I mean the BMW engineers are not dumb, and if they designed the power plant and trany in this way, it should have been for a reason. so when you come and reprogram the trany and engine to hold higher RPM, burn differently, and squeeze more HP, wouldn't you be paying for it on other levels? if the system can handle more power, it would have been done in the factory, cause u know how the makers compete with their cars specs, so BMW would have extracted those extra HPs and improved the performance of their cars...

any feedback would be enlightening

mrbmwx5 · #2 04-02-2009, 06:49 PM

If you going to do the engine/trans SW.Make sure you do CAI and exhaust too or else you get nothing out of it.

jsears · #3 04-02-2009, 06:52 PM

Wouldn't you still get an increased rev-limiter, new shift points, top speed govenor removed, and better throttle response?

Quote:

Originally Posted by mrbmwx5

If you going to do the engine/trans SW.Make sure you do CAI and exhaust too or else you get nothing out of it.

mrbmwx5 · #4 04-02-2009, 06:57 PM

Quote:

Originally Posted by jsears

Wouldn't you still get an increased rev-limiter, new shift points, top speed govenor removed, and better throttle response?

Yeah .... but not that great .... like having CAI+ exhaust

jsears · #5 04-02-2009, 07:01 PM

Very true. Plus if you are spending the $$ on Dinan stuff might as well as go big....

Quote:

Originally Posted by mrbmwx5

Yeah .... but not that great .... like having CAI+ exhaust

mrbmwx5 · #6 04-02-2009, 07:15 PM

Quote:

Originally Posted by mrbmwx5

Yeah .... but not that great .... like having CAI+ exhaust

Edit... Just like having cuban cigars and wine without hot chics

jsears · #7 04-02-2009, 07:17 PM

I can get chics with a CAI and exhaust? Dammit!

**Goes and starts exhaust shopping!

Quote:

Originally Posted by mrbmwx5

Edit... Just like having cuban cigars and wine without hot chics

TwinsPoppa · #8 04-02-2009, 07:00 PM

Quote:

Originally Posted by bgsquad

I mean the BMW engineers are not dumb ... well, that doesn't automatically mean they're geniuses either.

... and if they designed the power plant and trany in this way, it should have been for a reason. They're designing for different levels of compromises. Their threshold would be lower on some things and higher on others.

... so when you come and reprogram the trany and engine to hold higher RPM, burn differently, and squeeze more HP, wouldn't you be paying for it on other levels? Simply put, yes - just like BMW would be "paying" for it on their design compromises.

if the system can handle more power, it would have been done in the factory, cause u know how the makers compete with their cars specs, so BMW would have extracted those extra HPs and improved the performance of their cars... Again, to a point but not max. In general, Dinan and such mods will lean more towards performance and away from reliability.

any feedback would be enlightening. All are just my opinion.

See above.

bgsquad · #9 04-03-2009, 02:27 AM

Quote:

Again, to a point but not max. In general, Dinan and such mods will lean more towards performance and away from reliability.

Exactly, that's what I had imagined and wanted to confirm...

well, reliability is priority for me, and to be on the safe side, i'll keep it stock... I am used to big slow SUVs, so going 0-60 in 8.3 seconds is just more than satisfying for me

... my previous pathfinder and pajero needed ages to reach 100km/h with handling and driving pleasure like crap

TwinsPoppa · #10 04-03-2009, 09:09 AM

Quote:

Originally Posted by bgsquad

Exactly, that's what I had imagined and wanted to confirm...

well, reliability is priority for me, and to be on the safe side, i'll keep it stock... I am used to big slow SUVs, so going 0-60 in 8.3 seconds is just more than satisfying for me

... my previous pathfinder and pajero needed ages to reach 100km/h with handling and driving pleasure like crap

Hey, whatever floats your boat.

However, I tend to feel that more than likely its not the performance mods themselves that cause reliability to go down dramatically, in most cases - its the people giving into temptation and ragging out their vehicles.