How to turbo your N/A

[Chi100188]

anyone in perth wanan a fellow skyliner help hehe

Cheers

Chi

[andylaurel]

yeah its my new drift car.

its got 10:1 CR

no decompression.

when it f**ks out a piston, ill slap a 3litre bottom end in with some cheap forged pistons.

it should last for a while, its got good oil pressure and its got mega amounts of fuel going in.

[linedup33]

hey andy, how much psi of booost r u running at the moment? n wen does it kick in?

cheers.

[666DAN]

with an RB20 turbo it'd be on boost almost instantly My one was about 6.5psi @ 1800rpm from memory (R33 turbo)

[Chi100188]

woah instant boost hahah sounds good

Cheers

Chi

[juddieR31]

Even with the highflow T3/4 I have, full boost is still made at around 2500, makes for crazy wet road driving

[Chi100188]

hmmm i guess the only trouble that i have in the process of doin this turbo thing is to drill the holes in the engine? who do i get to do it? or can i do it myself?

Cheers

Chi

[linedup33]

ok thanks dan, wats the highest u could run? n wat would u need to b able to run more?

[666DAN]

The highest I ran was around 8psi, with some decent cams and a highflow turbo I think I could have pushed it a bit further. Also another thing which will be a benefit is getting some colder spark plugs...7 range.

[linedup33]

thanks again dan...just wondering would i b able to run psi of boost more safely with forged pistons n 660cc injectors n those 7 range spark plugs...and would it also kick in around that same sorta rev range?

thank you sooo much.

[666DAN]

If you're going to lower the compression when you put the forged pistons in, then yes you can run more boost. Guessing at the size injectors you want to put in you'll want to be chasing >18psi anyway to make use of all the extra fuel

[linedup33]

ok sweet all ill need is forged pistons, 660cc injectors n those spark plugs n i can run that amount of boost, thats awesome...will the boost still kick in early? wat injectors would u recommend just to be able to run to about 15-16 psi safely?

[666DAN]

Well it's more of a case of compression, there is no way that you can expect anything more than 12psi even that's with awesome cams and a great tune. Most people will be running ~8psi on 10:1 comp.

Forged pistons will drop the compression to whatever you want, but it will turn the engine effectively into a normal 25DET really, so the boost will kick in as it normally would with no advantage of high compression.

If you want to keep the high compression, take advantage of it with one of Slides highflows, run 8psi on normal 370cc injectors. It'll have awesome low-down torque and fairly respectable power.

[andylaurel]

ive got a problem with controlling boost, its running up to around 0.8 bar which is more that i want. there is a bleed valve on the wastegate line but its fully closed, i think it may be still causing a boost increase so im gonna bin it.

boost is instantaneous. i still havent hooked up the NVCS so it falls over pretty bad, and the plugs are gapped at 1.1 so it breaks down slightly, but once i overcome these probs, it will be great.

[andylaurel]

oh yeah i am going to get a sliding highflow, man they are cheap (almost too cheap)

with that turbine, im gonna aim for 180kw at the wheels

[Chi100188]

hey can anyone explain to me the whole process of bolting the turbo onto the RB25de engine? like where do u have to drill holes etc etc?

Cheers

Chi

[andylaurel]

the only hole you have to drill is for the sump return fitting.

the RB25de doesnt have a oil drain from the turbine so one must be welded into the sump (unless you wanna machine the block - FLAG)

otherwise it all bolts on NO WORRIES MATE

just bolt it all on man... its a no brainer.

[Chi100188]

hmmm i wish i can do that aye mmm the sump thing sounds hard ! lol mmm it would be great like REALL great mmm if its not too much hassle !

Cheers

Chi

[SilverECR33]

if anyone is planning to do this, i have the stock R33 intercooler and piping for sale atm, for $80 ono. just pm me, its all in very good condition btw.

Don't be fooled gents. its not only the compression factor, but the piston itself, the N/a pistons are not Hyperputectic. therefore, even with low boost pressures, after a while you will melt a piston.

By all means, do this upgrade! turbo is 100% better effecient power, than most other mods. But do plan to change your pistons over in the near future.

[andylaurel]

^^^ im gonna start saving for some RB30 forged pistons and get a crappy old NA RB30 block then.