Help With Information For My Build

[kanor34]

Hi people. i'm new to the forum as a user but have worked my way around majority of the posts. i have an r34 4 door manual and am looking for more power (like most people). now im a diesel mechanic and am keen to do all the work (bar tuning and custom piping of course). now i've so far bought a gt35r turbo with a split t3 flange (questions on that later). an ebay copy greddy manifold. a plazmaman exhaust manifold to a t3 flange. also gettin all the other neccessities ie. 550cc injectors with a hks rail, 38mm wastgate, sard fpr, tomei pon cams, hks adj cam gears, z32 afm and button clutch, power fc.

Now it might be a big ask and from my research i havnt found many topics about r34. i would imagine they would be fairly similar to the r33 but not sure and dont want to run in guns blazing only to find someone looking back at me with a bazooka!!

1:now my first question is about the turbo. T3 split flange will it fit to the normal T3 flanged manifold??

2: The manifold i found an awesome write up about a greddy manifold and read it many times was wondering if there are any big differences between the normal and the neo?

3. The power fc i would think i could simply plug it in myself and get someone to tune it. Though ive hears something about boost control part to it? can i just control boost with my gizmo ebc and still run the PFC?

also are there any other mods that should be done (besides forging) while the motor is in pieces and things are easy to get to?

any help with these questions would be very helpful.

[KiwiRS4T]

If you search using the term "neo" you will find a lot more info. You will need to check if the manifolds for R33 suit the neo - stock throttle body will be fine. You will need to be very carefull with forged piston selection as a few people have ended up with sky high compression ratios through wrong pistons for the neo. Make sure you get top feed injectors (you don't need a new rail or fpr) and you only need one adjustable cam gear (inlet has variable cam timing). Double and triple check that you get the right poncams for the neo head. I would forget the Z32afm and get a Link/Vipec ecu (which uses a map sensor) and that would do boost control as well. However if you can find a suitable PFC then that will work with the Z32 or maybe Q45 afm and with your ebc. Think about getting a more grunty intank fuel pump. And if you still have the sidemount you will need a fmic suitable for 350 + kw. 38mm w/g may or may not be big enough - have a trawl through the RB25 turbo upgrade thread.

With all those mods (good idea to do them all at once if you can afford it) you won't be able to drive your car to the tuner - you'll have to tow or trailer it.

[scotty nm35]

1:now my first question is about the turbo. T3 split flange will it fit to the normal T3 flanged manifold??

Yes, same bolt pattern.

3. The power fc i would think i could simply plug it in myself and get someone to tune it. Though ive hears something about boost control part to it? can i just control boost with my gizmo ebc and still run the PFC?

Yes, Keep the Gizmo.

also are there any other mods that should be done (besides forging) while the motor is in pieces and things are easy to get to?

for that size turbo I would be going for a built 3L bottom end and slapping the 2.5 head on.

[Simon-S14]

1: you should never have pulled the motor spart.. they are strong motors and will handle lots of power providing it has the correct support systems and tune

2: a split pulse turbo housing will fit on a non split t3 manifold. but you wont see any of the benifits of the split pulse design.

3: greddy manifold will cause you yo lose midrange torque. stock is best and can flow upwards of 400 rwkw. if you must go forward facing either get a plazmaman or similar. or GTR throttles.

4: use your gizmo ebc and get someone to tune the PFC.

further notes: that wastegate is too small if you fit cams and want to run a 35R. you'll need a 44mm gate minimum. greddy copy manifold is junk and 550's may be a tad on the small size if you want 350+ rwkw

[GTScotT]

agree to above.

either sell your exhuast manifold or sell your exhaust housing.. if you sell the manifold buy a 6boost that suits t3 twin scroll, if you sell the exhaust housing buy an open frame t3 housing. simple stuff there

again, ditch the greddy copy plenum and the 550cc injectors.. use the stock plenum and get injectors around the 800cc - 1000cc mark. you will want the headroom for E85 later.

[kanor34]

wow thanks heaps for the suggestions people keep them coming if you can think of more to add. im looking for 400hp safely. have'nt pulled the motor apart and was told that they are strong internally as long as the tune is good which is what im going for.

I've already got the power fc so thinking i might get the q45 afm to go with it. I'm going to tow car to tuners.

the greddy copy manifold i have'nt purchased yet and if people have run 400hp on the stock ones i might think about keeping mine. If i do should i modify to make it forward facing?????

ive already purchased injectors went for a set of denso 550cc injectors top feed high impendence blah blah blah does this mean i need to get an aftermarket fuel rail or will those injectors fit the manifold with the fuel rail mod i have seen on this forum?

The current mods on the car at the moment are the usual stage one stuff fmic exhaust intake.

[Bsa]

Get a z32 afm

[Simon-S14]

yeah mod the stock manifold to be forward facing.. people will tell you that it doesnt work and that there are flow distribution drama;s this is crap if its done correctly.

plenty ppl makng 400 rwhp from stock rb25's reliably mate

[kanor34]

ok so now does it have to be forward facing manifold to get 400hp reliably?? or can i just leave it as is?? cos i think it would be easier to put a new manifold rather than modifying the old one???

are those injectors big enough for wot i want? how about fitment??

[GTSBoy]

The std neo inlet manifold is fine at 400HP. There's no reason to change it unless you need to change the pipe routing in the engine bay - ie big top mount turbo making it hard to keep the crossover pipe.

[kanor34]

Ok so I'll keep the stock intake manifold though as I said before I will have a high mount 35r so the crossover pipe will cause problems I think though I have seen people do it before but means I have to put a 110 degree pipe to the intak manifold... Still undecided I guess if i just make it work as is now and see how I go I am buying another run around so I will be able to take my time with this build and hopefully document it for future neo builders

[Bsa]

It works that way just have the pipe come down past the oil filler cap

[kanor34]

ok just had a good long squiz under the bonnet and ive decided to throw away the stock manifold cos it just looks too messy and the injectors i have purchased are for the "big bore" holes and wont fit. so now my question is the throttle body now is MASSIVE to say the least how can i possibly bolt that up to an aftermarket forward facing manifold. ive see the r33 version but the neo and another butterfly in it and the hole assembly is about 12 inches long what do i do????? do i get aftermarket throttle body?? IF so wot happens to the massive actuator thing hanging off the crossover pipe?

[rob82]

Trust me for the 35r the best manifold is the standard one or the plazmaman if you looking at going above 7000rpm repeatable. It will be the fastest spooling, create the most midrange and give you the least dramas. Leave the STD throttle body on it and just have a 180 degree bend on your ic pipe.

[GTSBoy]

Here's my tip. Don't start deciding to throw shit away before you understand what it does.

[kanor34]

heres my tip champ. if you dont have anything interesting to say stay quiet. I'm trying to learn and when I do i will help others. If your fighting the system what are you doin on this forum????

Here's my tip. Don't start deciding to throw shit away before you understand what it does.

[Bsa]

heres my tip champ. if you dont have anything interesting to say stay quiet. I'm trying to learn and when I do i will help others. If your fighting the system what are you doin on this forum????

He is right tho stock plenum is best. But by all means go forward facing and do what rob suggested both these guys know there stuff. I suggest you keep all your stock parts incase of defects could save some money there.

[kanor34]

yeh the comment was just a bit condescending in my opinion. I am keeping all my stock parts wouldnt have thought that they would defect me for an aftermarket manifold tho (if it passed emissions of course)??? im mainly doing it to clean the engine bay up and the injectors i have are big bore and id have to modify it. so im goin ahead with the forward facing. ive gotten most of the information i need now and prob goin to take it apart within the next few weeks.

cant thank you guys enough for the info was a big help and ill organise photos and stuff and a write up. cheers

He is right tho stock plenum is best. But by all means go forward facing and do what rob suggested both these guys know there stuff. I suggest you keep all your stock parts incase of defects could save some money there.

[GTSBoy]

yeh the comment was just a bit condescending in my opinion.

It was meant to be condescending. You're making engine mods based largely on appearance, and you don't even know what the traction control butterfly is/does.

[kanor34]

HAHA lets go then. No one knows everything about everything I'm a DIESEL MECHANIC not light vehicle i dont play with cars all day and want info so i dont f**k up?? sound legit. as if people dont modify stuff for looks why the f**k do people buy rims for????? light weight my ass!!! i know what traction control does sort of explains itself in the name or did you have trouble understanding it the first time? it doesnt exactly have TRACTION CONTROL written on it and like i said im used to controlling fuel not air ( diesel not petrol ). I still go back to my point. Why critisise me wanting information cos after all i thought thats what this forum was all about. you seem to be one of the idiots from boostcruising do you not have anything better to do then scan forums for people that dont "know" as much as you do and put condescending comments on their topic. seriously take a look at yourself and grow up.

It was meant to be condescending. You're making engine mods based largely on appearance, and you don't even know what the traction control butterfly is/does.