Need Advice For My Build

[v8 eater]

Hi guys,

So ive just bought an r32 (coz i love the shape) but want to drop a rb25 in it.. I want to run about 350-400rwhp and want it to be street legal to id have to do the permits etc..

Ive never attempted such project before so I need a bit of help/advice - better safe than sorry.

The mods I was thinking of having the following upgraded:

Turbo

Injectors

Fuel pump

ECU + tune

FMIC

6-9 puck HD clutch

Now here are my questions:

1) I been hearing a lot about the Gt35r turbos but unsure if theyll do or bit expensive and might as well go with cheaper?

2) 440cc or too low?

3) a lot use Walbro is there a specific pump needed or mainly all walbros are high flow rate?

4) what difference between ECU + tune or just a nistune (daughter board) + tune??

5) how will 6 or 9 puck clutches differ?

6) would i need a GTR gearbox or would stock do?

7) what would engineers certificates cost roughly? and engineers cert is done after all the upgrades? or before?

8) would i need aftermarket pistons/conrods? (ie forged)

8) have i missed anything? ie would i need an aftermarket suspension system to handle power/thrust? if so, i like a smooth ride (not rough) any recommendations?

and finally, how much will all this cost? roughly between what two figures?

MANNNNY THANKS

Edited May 27, 2012 by v8 eater

[75coupe]

all these questions have been answered before with various opinions as well, have a read of the dyno thread for what power mods you'll need, 35r is too big, walbro not my preference...

As for cost read through the countless other threads titled 'need some advice' or similar, people all seem to ask the same questions, at the end of it if you need to ask, you need to learn by reading and researching.

400rwhp you dont need a forged 25

35r is too big

Authentic bosch 040 fuel pump preferred (larger for E85)

500cc+ injectors, (750cc+ for E85)

Get a full ECU like vipec, link G4 or Haltech

Have fun getting a engineers cert..

someone else will come in and say nah the 35r will be fine, nah the walbro will be fine, nah the nistune will be fine etc...

and then you'll still be left with no direct answer and probably still buy the wrong the parts for 'your' pref and application

[Mitcho_7]

There was a thread about a week ago that was very similar to this. Have a look for it and a lot of your questions will be answered I think.

[pipster11]

i'd do a 25neo + some form of 25 box (some ppl keep the 20 box but thats asking for trouble, plus you can sell the whole 20det and box as package to the s-chassis guys)

then

highflow stock turbo/hypergear's big turbo with stock front housing (looks stock and still runs an internal wastegate

or

cheapy NZ manifold + kando t67 + 40-50mm wastegate

one will keep a stock look, one won't look anything like it, both should get near your goals

then for the neo motor, get some id1000's (reportedly run really well and can still give you good economy but will give you ability to run e85)

z32

nistune the neo ecu (make sure you keep vct!!!)

personally, ill be running one of these when i eventually get round to it http://www.deatschwerks.com/dw300-fuel-pump-tech/

either turbo should get you up around the 300kw mark, maybe even 350kw on e85

[AngryRB]

its no different to any other rb25 with 300kw the dyno threads have the answers.

[WMDC35]

/\/\ this is gonna get locked, 25 with 3076 highflow or various, only gtr box if 4wd gts4 which box is very similar anyway, gtr box can go rwd but a bit of hass

Edited May 28, 2012 by WMDC35

[Mitcho_7]

OP, read this if you haven't already.

http://www.skylinesaustralia.com/forums/topic/400867-thoughts-on-300awkw-rb25-r32-haltec-sprint-500-help/page__pid__6375251__st__20#entry6375251

Edited May 29, 2012 by Mitcho_7

[v8 eater]

I think most of you guys dont even bother reading my questions lol.. I have been to the link a few of you mentioned and got a lot of ideas which is why im posted to clarify some points.. ie: cost/difference between 2 items etc.. if someone can address my questions point by point itll be great.. its ok if you miss a or skip points which you can not answer.. thank for your input guys, very helpful!

[scotty nm35]

"what would engineers certificates cost roughly? and engineers cert is done after all the upgrades? or before?"

You should really go and talk to your chosen engineer first as he will have to dictate what you can and can't get away with. Otherwise you can do what most of us (down here) have done and try to make a stealth stock looking setup you can get away with on the street.

[v8 eater]

Thanks Scotty,

So i read @"highflow stock turbo/hypergear's big turbo with stock front housing (looks stock and still runs an internal wastegate"

and hes referring to the stock turbo - so i go to Xspeed for example and ask them to high-flow my turbo?

So fitting a big turbo in a stock housing is called hypergearing? also where can i get big turbo with stock front housing? who would do it? and how would a bigger turbo fit a small housing?

[t_revz]

Thanks Scotty,

So i read @"highflow stock turbo/hypergear's big turbo with stock front housing (looks stock and still runs an internal wastegate"

and hes referring to the stock turbo - so i go to Xspeed for example and ask them to high-flow my turbo?

So fitting a big turbo in a stock housing is called hypergearing? also where can i get big turbo with stock front housing? who would do it? and how would a bigger turbo fit a small housing?

Getting Xspeed to high flow your turbo will go to gcg and cost 1800 for maybe 230-240kw. Contacting hypergear who is on here will do it much cheaper and more power.Prob not as much power as you were hoping for but. Check the hypergear thread. Should keep you busy for a while

[75coupe]

So fitting a big turbo in a stock housing is called hypergearing? also where can i get big turbo with stock front housing? who would do it? and how would a bigger turbo fit a small housing?

Hypergear is a company that highflows and supplies affordable turbos in Australia.

HKS is company that builds great turbos and so does Garrett

You have so much to read and learn, all the info is either on this forum or on the net, how is it you need to be spoon fed?

Not trying to be rude (though it may come across harsh) but the knowledge is all here, you just need to take some time and read.

You only joined the forum 6months ago, I joined years ago and have been learning ever since...

I rarely have to ask any questions, because its all here I just search and read.

[hypergear]

So fitting a big turbo in a stock housing is called hypergearing? also where can i get big turbo with stock front housing? who would do it? and how would a bigger turbo fit a small housing?

lol yes you can call it that way .

Normally just send in your stock turbo, we will produce a new core with bigger and steel made wheels, then machine your factory housings to suit it. So you get back a brand new turbo hypergeared into factory housings.

[s213b]

I want to run about 350-400rwhp and want it to be street legal

Realistically this is impossible. 400hp calls for fmic, 3" exhaust, pod, etc which (depending what state your in) are not 'street legal' in the eyes of the po-po.

You have a lot to read, an engine conversion is a difficult & expensive process (I'm 3/4 way through an awd rb25 install into my r32 gts4) & even if you have the knowledge, time & money it can still very quickly become a head ache.

Clutch- worry about that after you've decided which path your going down.

I wouldn't bother engineering. Keep everything in the engine bay low, black and quiet, and don't drive like a wanker and you'll be sweet

If i was you, & your rb20 is still running, I'd do this;

Keep rb20 & box. (if my rb20 was still running I would have done this)

- td06 20g turbo

-gtr injectors & pump

-z32 afm & nistune ecu + good ebc

- e85 fuel (depending on availability?)

As well as your run of the mill mods like fmic, pod, 3" exhaust, 16-18psi etc. this should set you up for 220-240rwkw which is pretty much the limit for a 20+ yr old unopened rb20.

If your dead set on a 25, I'd find a rb25neo (r34) engine & box package &:

Gt3071 / gt3076 turbo on 15-18psi

1000cc injectors, walbro 400lph intank pump & e85

Nistune/pfc/haltec - whatever your tuner prefers

Yellow jacket coilpacks

Tomei 256 cams & cam gears

Z32 afm, fmic, pod, 3" exhaust etc

That's what I'm doing with my rb25 in my 32 & will hopefully see me on 300awkw (400hp). Have a look at my thread in forced induction & have a read.

- remember anything with cars, take idea in your head, double the time & double the money & you have your realistic answer.

[v8 eater]

Thanks everyone.. Hyper gear, I will be considering it

thanks josh sort of what i wanted to know

but one more thing, im a bit confused with e85.. thats a methanol fuel and is rare at local pumps but what sort of setup i need to run e85?

1000id and an ecu tune? thats all?

[75coupe]

wow there's already a few threads to cover your last question... one is particularly long and full of info...

but you've already that, right? RIGHT?

nah you didnt, you havnt read or researched much at all have you...

the people answering your questions will eventually get sick of answering the same ol questions time and time again,

such as I am apparantly.

[pipster11]

Thanks everyone.. Hyper gear, I will be considering it

thanks josh sort of what i wanted to know

but one more thing, im a bit confused with e85.. thats a methanol fuel and is rare at local pumps but what sort of setup i need to run e85?

1000id and an ecu tune? thats all?

e85 is ethanol (85%)

you can just get bigger injectors and a tune but ideally you'd run an ethanol content sensor and an ecu that can read it (most $1500+ ecu i think)

this will let you put 98 or e85 in and it will adjust to suit otherwise you will probably hit detonation if you ran 98 on your e85 tune

[GTXR34]

if u want more precise answers and prices find out whos your closest performance shop/tuner,..

give them a call and they should be able to answer all your questions at once...

if looking though the couple(by this i actually mean 100s) of threads on sau cant answer ur questions then I hope you get some very patient tuner..

its not just a matter of bolting on parts and ul get the power..

if you are asking these questions you probably will be getting someone else to do all the job for you so you need to also consider labour costs..

well theres my recomendations anyway..

1. A GT3076R will do
   
2. 600cc or more (850cc for e85)
   
3. Bosch 040 pump will be perfect (x2 for e85)
   
4. Get a pfc or nistune
   
5. Clutch will depend on what ul use it for
   
6. Standard should do
   
7. Speak to an engineer
   
8. A standard 25 won’t hold over 280rwkw if used on track for too long but will last a bit for street use
   
9. Exhaust, z32 afm, coilpacks, intercooler, radiator(if tracking), boost controller, labour.
   

1. A GT3076R will do
   
2. 600cc or more
   
3. Bosch 040 pump will be perfect
   
4. Get a pfc or nistune
   
5. Clutch will depend on what ul use it for
   
6. Standard should do
   
7. Speak to an engineer
   
8. A standard 25 won’t hold over 280rwkw if used on track for too long but will last a bit for street use
   
9. Exhaust, z32 afm, coilpacks, intercooler, radiator(if tracking), boost controller, labour.
   

[v8 eater]

wow there's already a few threads to cover your last question... one is particularly long and full of info...

but you've already that, right? RIGHT?

nah you didnt, you havnt read or researched much at all have you...

the people answering your questions will eventually get sick of answering the same ol questions time and time again,

such as I am apparantly.

mate if you dont wanna help, its as simple as not coming back to the same thread which "made you sick". I hate tossers like u who use complaining as a tool to show off that you know shit. Humble yourself please, kthxbye.

Herb and Tom thanks heaps for the info!

• 600cc or more (850cc for e85)
  
• Bosch 040 pump will be perfect (x2 for e85)
  

and

you can just get bigger injectors and a tune but ideally you'd run an ethanol content sensor and an ecu that can read it (most $1500+ ecu i think)

this will let you put 98 or e85 in and it will adjust to suit otherwise you will probably hit detonation if you ran 98 on your e85 tune

Whats that feature called? just ethanol sensor support or its got a specific name?

also how does it know when you switched from ethanol to 98? different tanks and a specific way of switching?

and yes, the work will be done by certified mechanic not myself.. its a shame that im doing Mechanical engineering third year and barely know how most of these things work.. I cant wait till i put this crap we learn into practice lol stupid uni -.-

[v8 eater]

extras: z32 afm, coilpacks and a boost controller

thanks herb, how silly, i forgot about these.

with the coilpacks, something like the splitfires should do? or is there a more heavy duty type id need?

z32 afm = 300zx twin turbo air flow meter?

also, electronic boost controllers r always better?

many thanks again