Hks 555cc Injectors

[Light]

Hi mates,

I want to know what is the maximum (safe) power i can get with those ijectors along with fuel and turbo..etc mods i have..RB25DET:

HKS 555cc injectors

walbro 255

stock rail

sard standard reg

greddy t78

HKS 1.2mm metal head gasket

stock internals

pfc

what boost do you suggest to stay in the safe side???

Edited April 7, 2007 by Light

[paulr33]

change the pump, get a bosch

id say 350rwkw maybe ?

[Light]

change the pump, get a bosch

what in-tank pumps bosch makes?? do you have the part number? website?

what do you think of my 555cc injectors? what is max boost u think?

[paulr33]

040 is internal

no part no#, do a search

injectors, are injectors, as long as they work

boost no idea, the compressor map determines that

that compressor will dial in a fair amount of airflow

i woudlnt be going near 300rwkw with std internals

it will go bang. can u afford a rebuild

[Light]

what do mean "injectors are injectors"

dont they have a maximum that at a specific point of boost they will stop being sufficient??

I think so but please correct me if i am wrong

and what is maximum hp/kw stock rb25det internals can hold?

[paulr33]

injectors have nothing to do with boost

they can only flow so much, that is 555cc per minute

should get u upto maybe 350rwkw so they are fine

stock internals i wouldnt go past 280

even thats pushing it, depends on what u do and how u drive it

[fEkuaR]

Id stick to around 250rwkw if you would like the engine to last. Regular servicing and not thrashing it to death you should see it to be quite reliable. If you dont get forged rods, pistons and really make use of the power that turbo can make its pointless to have such a large turbo when you could have alot more responsive set up making the same power.

[Light]

so what forged pistons and rods do you guys suggest? *reasonable price

[Cubes]

The T78 is a tad oversized for the stock rb25t.

Realistically 250-260rwkw is a nice reliable number but 300rwkw can be done providing its tuned well and the static comp dropped a tad via a thicker headgasket.

Either way.. the T78 is oversized. lag lag lag when you don't really need to have for that power level.

[crack]

gtr rods at a minimum but there a number of piston manufacturers that you can use. arias, weisco, cp to name a few.

[VHR32]

Just look around on the forum and take not what others use, then do a Google for prices.

Look in the traders for sale section and see what specials they offer.

Pistons avg $1300, Rods $800 and about an extra $3000 to do it properly......

[Marco-R34GTT]

So pistons and rods won't be too good to use past 280kw is that right? Also, on that note, how many kw would the stock crank handle before also requiring to be changed?

[discopotato03]

Light depending on what you are going to use the car for I would be thinking realistically how much traction can I get at best and will the drive line stand up to the power delivery - let alone the pistons rods and crank . It sounds like a can get a big turbo situation and may end up starting here and spending a fortune by the time you reach the other end of the car mods wise . If you don't have the T78 or the budget to build an 800 Hp capable car I reckon I'd be looking for a turbo that would keep you within at least the practical and affordable limitations of the driveline starting at the fan and ending at the tyres .

For the 250 + RWKW that you can probably get to the ground through sane street rubber a Hi flow or a real GT3071R done right WILL be streets ahead . Night and day .

Your call , cheers A .