Jump to content
SAU Community

Recommended Posts

i was at autobarn today and i dont know if this guy was spinning crap to me but he told me that

the only different and the rb25de and rb25det is nothing since that didnt want to waiste money on changing internals he said the only thing i need to change on my rb25de engine is the decompression plate and the head gasket and then i can add a turbo and get an ecu and get it tuned? is he correct or is he spinning shit to try and look good?

Link to comment
https://www.sau.com.au/forums/topic/174021-na-engine-same-internals/
Share on other sites

yes its true just high comp and no piston squirters is the only difference

I know of one 33 NA 25 make 265rwkw on 12psi wt hks 2535

without a different h/g

so depending on your needs your current motor may be fine

Edited by 1400r
yes its true just high comp and no piston squirters is the only difference

I know of one 33 NA 25 make 265rwkw on 12psi wt hks 2535

without a different h/g

so depending on your needs your current motor may be fine

what do u mean are u saying i can gain decent kw gain from other addons and just keep it a n/a engine?

i wouldnt mind leaving it n/a if i had some decent power

yeh no

turboing your current motor may be fine for your power goals

i have a turbo and everything i need right now except for the ecu and the decompression stuff.

can u name everything i would need to change it over internal wise... is it just called a decompression kit ?

and i have a turbo that runs 15psi on the lowest setting.

im pretty sure this is what its called. it has a nissan rb25 turbo front housing with a garret gt30 front comp wheel with a ar63 or 62 rear housing.. my mate had it on his drift car he said its a 500hp turbo does that sound correct?

hello could anyone here please tell me what it is i need as i heard i only need this decompression plate?

would it be better with a better head gasket aswell?

and could u please give me the name of what plate/hg i would need or even a site for it would be better

and whats the piston squirters 1400r was talking about

Edited by Spartann

just go a larger head gasket

to obtain atleast the same comp ratio as a factory turbo motor or less

and get that turbo running less boost 12 psi is probably max you would want to run

ps theres a NA section on here somewhere with a how to turbo your na 33 would be worth reading that thread

as it would have all your answers

here it is

http://www.skylinesaustralia.com/forums/in...showtopic=69998

Edited by 1400r
just go a larger head gasket

to obtain atleast the same comp ratio as a factory turbo motor or less

and get that turbo running less boost 12 psi is probably max you would want to run

ps theres a NA section on here somewhere with a how to turbo your na 33 would be worth reading that thread

as it would have all your answers

here it is

http://www.skylinesaustralia.com/forums/in...showtopic=69998

hi i read the turbo on n/a post but they didnt talk about having the same internals.

they said just leave the compression ratio which i dont want to do. if i just change the head gasket would the engine be able to withstand 15psi? or would i need to upgrade to forged pistons?

hi i read the turbo on n/a post but they didnt talk about having the same internals.

they said just leave the compression ratio which i dont want to do. if i just change the head gasket would the engine be able to withstand 15psi? or would i need to upgrade to forged pistons?

the std internals will cope with 15psi.... depends on your tuner as to how long it will last.

  • 2 weeks later...

mine was orginally a na but I converted to turbo just changed the motor apparently alot is different cams, pistons most of which are made for forced induction which are also stronger also your gunna need a different fuel pump if ya gunna b running high boost, the na gearbox wont handle the torque neither the brakes which are alot smaller if you intent to stop and the diff is made for top end the turbo model is for better acceleration you's may think i dont know but ive been there!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hope you aren't too sore after that one, might take a day or 2 to notice yet and I guess it is a loooooong drive home. On the bright side, tube frame front end is a thing at superlap, right?
    • https://www.facebook.com/share/p/18rmVb1SKB/ 
    • The chart of front pressure to rear pressure (with one being on the x axis and the other being on the y axis) is not a straight line on a typical proportioning valve. At lower pressures there is a straight line with one slope, and at higher pressures that changes to a lower slope. That creates a bend in the line at that pressure, called the knee point. If you do not change the proportionng as the pressure gets higher, you will suffer excessive pressure (at one end of the car or the other, depending on which way you look at the proportioning action) and then get lockups at that end. The HFM BM57, from my memory of previous discussions, is based on the BM57 from a different car (to a Skyline), with a different requirement for the location of the knee point and the distribution of pressure front to rear, and so is not a good choice for an upgrade on a Skyline. Here's a couple of links to some old posts, one from here, one from elsewhere. A lot of it pertains to adjustable prop valves, but the idea is the same. There are plenty of discussions on here about this issue from al the many years of people wanting a cheap/accessible option. https://grassrootsmotorsports.com/forum/grm/learn-me-brake-proportioning-valves/236880/page1/ https://grassrootsmotorsports.com/forum/grm/learn-me-brake-proportioning-valves/236880/page1/  
    • Yeah dunno why johhny posted that here with no context, just post on FB/insta bro where he put it up?  Laine had an off at T4 during Thurs prac, he's ok, car is less than perfect, they are done for the weekend, he can fill in the rest. Bando also binned it like 100m up the road.   
    • I feel there must have been a FB/insta post and the weekend did not start well at all I hope everyone is all okay
×
×
  • Create New...