Rb25det Rebuild

[ovabooster]

Im in the process of rebuilding my neo rd25. This process started 14mnths ago and i have since changed my dam mind about 100 times. I was orignally going to run a hks gt28 kit ( for sale ). But if im forking out some much for a reliable big power engine then might as well match a turbo to suit. I need some advice and suggestion on running a package that is both reliable and effective. My power goal is 450rwkw..Yes i know its going to be a lag monster....But im a power junkie....We are strictly taking about engnie mods only and not susp driveline etc which I am fully aware is also a priority!

Engine mods:

tomie in tank lift pump

x2 bosch 044 pumps

sard fpr

surge tank

sard 1000cc injectors

HKS gtr hks fuel rail

tomei poncams 260

hks timing belt

heavy duty valve springs/retainers

k-line valve guides

hks 1.2mm gasket

head work

head studs

wiseco 40thou pistons

head decked to suitable comp ( thinking 8.8)

eagle h beam rods/bolts

acl engine bearings

main stud kit

balanced bottom end

crank collar

n1 water/oil pump

to4z .81 a/r

6boost manifold

hybrid cooler

x2 z32 afm

power fc/av-cr

splitfires

greddy plenum

q45 tb

It will only be a weekend driver and never see track days.

1. I dont know weather to sell the n1 oil pump and fork out the jun one together with a larger sump? Would this be needed? I will modify whats needed to the cylinder head and try keep oil down bottom end.

2.How is the power fc going to run the twin afms?

3. Splitfires sufficent or do i need some mw ignition

4. how about cam gears? I heard NEO dont respond to them and waste of money

5. Will there be any clearance issues mounting the turbo?

any feedback appreciated

Edited August 3, 2007 by ovabooster

[BaysideBlue]

whats the point of having an 450rwkw weekend driver?

was the manifold meant for a r33? if so you might have clearance issues with the turbo.

It will only be a weekend driver and never see track days.

1. I dont know weather to sell the n1 oil pump and fork out the jun one together with a larger sump? Would this be needed? I will modify whats needed to the cylinder head and try keep oil down bottom end.

2.How is the power fc going to run the twin afms?

3. Splitfires sufficent or do i need some mw ignition

4. how about cam gears? I heard NEO dont respond to them and waste of money

5. Will there be any clearance issues mounting the turbo?

any feedback appreciated

Edited August 3, 2007 by BaysideBlue

[ovabooster]

well...if i do drive it...weekends as i have a van for a daily driver....

[ovabooster]

havent got the maniflod yet...6boost makes them custom made

[R31Nismoid]

1. I dont know weather to sell the n1 oil pump and fork out the jun one together with a larger sump? Would this be needed? I will modify whats needed to the cylinder head and try keep oil down bottom end.

2.How is the power fc going to run the twin afms?

3. Splitfires sufficent or do i need some mw ignition

4. how about cam gears? I heard NEO dont respond to them and waste of money

5. Will there be any clearance issues mounting the turbo?

any feedback appreciated

1. Never see's track days - N1 should be fine. If you were going to flog it i would personally get a JUN for that application.

2. Fine

3. Yep, you might need an ignition box (HKS)

4. In stock for the NEO doesnt like them, but your no longer stock/ish so give em a whirl

5. As you said, manifold is custom made... so mute point that

[paulr33]

it should be noted if you plan on using the neo 25 powerfc it will not support twin afms

your options are;

use neo 25 with safc II or neo to split the afm signals and math squish them to a single afm input ECU

use rb26 powerfc and run twin afms correctly - but youll need to get it working with all of the neo sensors etc

[CRSRB25DE]

Do not use klines in these guides.

Klines suck, i only use them as a last resort eg. in old v8's and heads without removable guides etc.

They wear very fast and will more than likely crack the brittle inlets when being installed/broached.

[Adriano]

Most of the mods sound good, however i would get oversize valves to go with the headwork, and bigger cams. no need for 1000cc injectors, just 720's or 800's.I would only use a thicker headgasket if it is necessary to achieve the correct squish/compression. Have you considered putting an rb30 bottom end in, as it will probably end up cheaper(as you can sell your existing bottom end for more than an rb30 bottom end will cost), and it will reduce the lag cosiderably making it a heaps nicer drive.

[ovabooster]

most of the parts are already purchased....As mentioned the whole package was orignally built for my hks gt2835. I've gone alittle over board since then. I already have a power fc so what are my options?....sell it and get a wolf 3d? I wouldnt have to spend to much more I surpose coz i can flog off the z32 afm too..It just a matter of selling things at the right price. I also already have the 1.2mm head gasket. Runing 40thou pistions on stock thickness gives comp in the low 8's, I think 8.3...thinking better to get the engine builder to deck the head to a suitable ratio instead. I also already got nismo 480cc injectors....so upgrade to sard 800 is the go. Cams are also purchased and i read good things about these 260's.....Would oversize valves not benefit much with these as I think bigger cams would better. I have considered a rb30 bottom end..trust me and only if i thought of that at the start...but the i would have to sell most of my gear...to much hassel. I might just get a spare smaller a/r for driving and larger one for dyno's or when i need to boost my ego alittle....

If any1 is interested of know's of any1 else who is

For sale

Brand new nismo 480cc injectors

Brand new Power fc

Brand new z32 afm

Brand new hks gt2835 pro s kit

pm for prices

[R31Nismoid]

Use the for sale section to sell stuff mate please... not this one