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[cem_devecioglu]

I think megas can have very good timings with starting phase modifications on the engine (exh.manifolds, cams,compression ratio cone filter, re-chip etc) but for cooling the engine necessary very expensive and detailed job.And also after fuel costs will jump to jumbo levels which will not be practical for daily usage..  

PS: and not very sure GM made autobox will stay long with that much power..

[TheBoy]

sports mode changes nearly 6500 rpm if I  see correct ( I'm four eyes and cant see far

but manual 1-2-3-D sequence I can reach 7000 rpm easily ..

PS: never measured the timing in secs but I dont believe this silly 9.5 seconds for 2.5 V6
as I start with BMWs at the light and they do not overtake me (rating 8.5)

mine has a rev limiter at 6750 rpm. Apparently

just under 8s is what we see from 2.5 autos in UK, not sure if your spec has same gearing...

As I say I cant see very good  

I assume the end of rev as 7000. In too many stupid net pages they tell 9.5 and sometimes 10.2 what make me mad  

You make me really realy happy thanks  

The autobox is the same as yours in UK ..Now jumping...

in uk, we have different diffs on 2.5 to gear down to improve acceleration, as said, not sure if yours does?

GM origin french made AR25 .. I think this as standart for 2.5 autos

Yes, gearbox will be identical, but there are 3 different ratio diff units, so if you have a higher ratio diff, it will hurt your acceleration.

[cem_devecioglu]

Is it possible to change this unit ( or gear ratios) without changing the autobox totally ?

Because manual conversion here nearly costs a meggy price which is 6 to 8 times expensive than UK