im thinking of getting rid of the greys, and putting in some siemens.
will i need to change the chip?

 

Yes, you will need a chip to suit the siemens, and all for no advantage, but it's your money.
tabetha

 

yeah but i can run more boost with blacks, greys are at limit

 

What size are you going for Greg?

 

you will def need a new chip; greys are good for 450hp ish, you sure they are going to get maxed out?

like tabs said, dont change unless you have too

edit: the siemens are all the same price 55's, 72's & 83's!

 

dicko has got some 72's,
want just over 2bar of boost, dont think greys will be up to it.

 

p.s its t4, ported head, cams etc.

 

for a t4 you will probably max out the 55's so you may as well go for the 83's

 

greys are 501cc, 72's are 750cc.

so if the greys are "ok" surely the 72's will be fine?

 

yeah they will be; but what if you want a bigger turbo in the future? you might have to change the injectors again, so getting the 83's will future proof yourself so to speak

 

if i change turbo etc, i would then totally change engine spec/chip.
i jus want to wind boost up a bit more and not melt it, so the plan was to put in the 72's to be safe.

if the car will not run with them injectors, then i will scrap that idea.Keep car as is
and next year change chip,injectors etc

 

yeah; if you change injectors you will need to change the chip regardless

 

ok mate cheers.

 

I would have thought that greys would be ok at just over 2 bar as i was running 2 bar with only light blues in never missed a beat.

Might be wrong but im sure someone will point it out if i am.