[HELP] RB25DE -> RB25DET

[gatty]

hey guys

I'm thinking about buying a half cut - then doing a converison on my R33 (RB25DE) to a RB25DET

I don't want any replies telling me to sell the car and buy a turbo 33 - because thats not what I want to do

I'm after any information from anyone who knows how, or has done it before. How hard is it to do? How different are the looms? Will any changes need to be made?

I was looknig at a friends RB25DET and there seems to be a shitload more stuff not only under the bonett - but also under the parcel shelf etc?

Also any info on how to remove the motor wuold be great too

Thanks guys

[BHDave]

i think there's a very long thread on this somewhere... DAN666 did it with an r34 pretty sure.

His was a turbo bolted onto a NA i think.

As far as the conversion goes, try and get a hold of an rb25DE pinout diagram and an RB25DET pin out and wiring diagram for reference.

Then have a look at the dash plugs and power plugs in particular, if they are a straight plug in it will make life alot easier. as far as evrything elso goes about the only thing youd need to do is swap the engine mounts. All anciliarys should hook up no worries. Worst case you'd have to swap the AC and powersteering from your current engine onto the new one.

[gatty]

yeah, the bolt on turbo is another option i'm looking at....

thanks for the tips mate

right now i want:

1. easy

2. cheap

in that order

so bolt on turbo might be it

[gatty]

i spoke with meggala in PM and he gave me some insight to simply turbo'ing this motor - i am leaning towards doing it now....

[QuickR33Melb]

Oh this has been done to death. The simple explaination is that while it is possible it costs alot of money and even then you wont have the reliability of a factory turbo. If you have the cash to do the conversion why not buy the turbo model??? I guess you need to learn by making the mistakes yourself.

All the suff under the parcel shelf is a fuse box HICAS 4WS system and in the R33 a battery

[gatty]

na mate, there is more thna just that, my NA has batetry/HICAS and fuse box - I know as I relocated them for my speaker install

and when you sit down and calculate costs - it wouldn't be cheaper tos ell my car and buy a turbo version - sell my NA, lose money on it as you do with cars, buy a stock turbo without my nice buddy clubs

[Kor'axis]

why not get a rb25det Neo half cut? How much do those go for?

or maybe a non skyline engine?

[blind_elk]

...or maybe a non skyline engine?

Wash your mouth out!!!!!

RB25DET should drop straight into a R33 RB25DE (well it did for my RB25DET into R32). If you buy a half-cut, you will get a loom and computer to match the engine. Simple.

(hint - to replace the loom, remove the LH guard)

[Eug]

Wash your mouth out!!!!!

Actually this was done last year by a good friend with very very good results.

http://www.skylinesaustralia.com/forums/sh...ead.php?t=35764

managed to get a best of 233.6rwhp

[email protected] With GAS!!!!

It ended up costing less than an RB25DET conversion, but I guess going the

RB route is a little more practical.

[gatty]

NA_R33 is a crazy mofo

i'm still thinking about the option of +t the DE, save me having to do brake upgrades and stuff right away

[Kor'axis]

I thought the Neo was a bigger* engine and might not fit into r33?

*bigger as in actual physical size of engine not capacity (i know it's still 2.5)

[gatty]

i thought there is little difference between the two

[Alf]

i'm still thinking about the option of +t the DE, save me having to do brake upgrades and stuff right away

Brakes is one area you want to spend money not save money.

If you want to do things cheap, stay na coz turbos aint cheap, period!

[gatty]

running 6 psi compared to 12 psi + - of course you need more braking power - if i am running 6psi the current brakes would suffice

[paulr33]

hey aaron

hows the decision process going? turbos aint expensive

its all reatlive to power increase. turbo was designed as not so expensive way to increase acceleration power, and thats how its meant to be

you should be able to pick up gtst breaks for cheap as

i mean hey i'll sell you mine if its to help a fellow skyliner

ill sell you mine and get some dba slotted/drilled ones instead

all the parts for a turbo conversion should be able to obtain from forums, other memers, jap wreckers, repco etc

[gatty]

things are moving slowly, stilld eciding and getting prices etc

re the brakes - i'd hev to do a hub converison wouldn't i? from 4 stud to 5?

anyway, where it stands now I have been able to source:

stock 33 turbo + all lines etc

manifold + other intake etc bits

stock intercooler

gtst injectors

He said somewhere in the range of 650 + shipping charges, so i'd be looking at about 750-800 unless I drove down and picked them up. I thought 800 wasn't too bad - then of course i'd have to get a ECU - which wouldn't be that hard...

I have gotten a quote for a r33 halfcut <2000 + delivery charges - less than 2 grand for a frontcut is insane, i'm still trying to decide if the seller can be trusted though - otherwise i'd just grab one from JJ in brissie

I've had a htink about what exactly i want out of the car - and i don't want it to be a racer or anything, just a bit more power - i'd be happy running ~7 psi through it and do a full conversion next year - or rb30 bottom or similar

[Alf]

hey aaron

 turbos aint expensive

Your forgetting the support systems that comes with turbos, not a cheap exercise compared to a worked na.

[paulr33]

what on earth? working on an n/a vs turbo is no where a good comparsion.

any basic mods in a turbo score at least 2x or 3x the gain vs in a n/a

yeah even with support systems it cant cost that much surely

stop being anti turbo conversion just cos you have gtst and he doesnt

let him have some fun it will be fine

gatty yeah 2000 is pretty good, a place in melb had a 65,000 rb25det for $2500

so its pretty good and right on the money. also if you do get a halfcut then you can run whatever boost etc you like and wont be limited to stock boost cos of compression, plus you can mix and match the best parts of the two engines.

[paulr33]

n/a add ecu $800 change you get 5-10rwkw

turbo add ecu $1200 change you get 25rwkw

n/a add $700 exhaust you get 5rwkw or maybe even make less power as the engine needs backflow pressure.

turbo add $800 exhaust (cos u need front/dump as well) and you get another 15rkw maybe 20rwkw and a lot better turbo spool up response

n/a add piggyback or ecu chip $300 get 5rwkw maybe 10rwkw

turbo add piggyback or ecu chip $350 and get 15rwkw

n/a add cold air intake kit $250 5rwkw maybe?

turbo add colr air intake kit $250 5rwkw maybe?

turbo add boost controller $200 15rwkw extra usually

[gatty]

yep, probably a bit more striaght forward also, i'm still trying to find some info on extra wiring etc that may need to be done if i turbo the current motor

and i'm no guru but working a NA compared to a turbo surely would be more expensive for the same power gains