Jump to content
SAU Community

Recommended Posts

Hey SAU.

I am thinking about taking my ride to the next level.. Currently 240rwhp (r34 gtt) with minor mods; just power fc, profec b ebc, pod, 3' turbo back exhaust, splitfire coils.. I basically want a really clean engine bay and i think the best way to achieve this is to go top mount, front mount aftercooler and a forward facing plenum with tb. I am aware that my injectors need to be replaced if i am to run any more boost..

I am looking to run around 300rwhp, but responsive. The parts that i need/want i THINK are:

Turbo (i haven't decided what brand or comp housing sizes yet, advices please?

High mount manifold (i would need a new exhaust made up to suit new manifold yes?)

Fmic (was thinking plasmaman?)

Fuel pump and regulator (bosch 044 should suffice)

Injectors (no clue how large i would need to go)

Forward facing plenum and fuel rail (probably go for a greddy)

Breather catch can (make the rocker covers look a little nicer...)

Cams (tomei poncams yeah..?)

Do i need a new throttle body? Are there good conversion kits avaliable? I've heard i need a metal head gasket at 300hp? But also heard if the head is torqued properly there is no need... If i do need the gasket, while the head is off do i get it ported and polished? And maybe shave 20thou off..? (:P) is there anything i am missing? Oil and water pumps should be fine ay?

I may also drop the redline down if i get all that done as i have heard overrevving is the cause of most rb engine failures.. Is this justified or 7k is just fine..?

If there is a thread covering this kind of job (as I'm sure there is) can you please link me? I am on my phone and it is really hard to search. If my questions/choices seem noob - please don't abuse! I am here to learn, let me know why i am an idiot with justified and rational claims.

Cheers dudes!

Link to comment
https://www.sau.com.au/forums/topic/414050-top-mountff-plenumfmic-convertion/
Share on other sites

240rwHP sounds gay. A Neo engine should be able to go to the 210 - 220 rwkW region on standard turbo and injectors, with management change. That's already pushing your 300 rwHP level. I'd be wanting to know why there isn't more power coming out than you report.

And most engine failures are not from over revving. They are in fact from hitting the rev limiter. You're perversely better off to lift the limiter to a higher value and stay off it.

Hey SAU.

I am thinking about taking my ride to the next level.. Currently 240rwhp (r34 gtt) with minor mods; just power fc, profec b ebc, pod, 3' turbo back exhaust, splitfire coils.. I basically want a really clean engine bay and i think the best way to achieve this is to go top mount, front mount aftercooler and a forward facing plenum with tb. I am aware that my injectors need to be replaced if i am to run any more boost..

I am looking to run around 300rwhp, but responsive. The parts that i need/want i THINK are:

Turbo (i haven't decided what brand or comp housing sizes yet, advices please?

High mount manifold (i would need a new exhaust made up to suit new manifold yes?)

Fmic (was thinking plasmaman?)

Fuel pump and regulator (bosch 044 should suffice)

Injectors (no clue how large i would need to go)

Forward facing plenum and fuel rail (probably go for a greddy)

Breather catch can (make the rocker covers look a little nicer...)

Cams (tomei poncams yeah..?)

Do i need a new throttle body? Are there good conversion kits avaliable? I've heard i need a metal head gasket at 300hp? But also heard if the head is torqued properly there is no need... If i do need the gasket, while the head is off do i get it ported and polished? And maybe shave 20thou off..? ( :P) is there anything i am missing? Oil and water pumps should be fine ay?

I may also drop the redline down if i get all that done as i have heard overrevving is the cause of most rb engine failures.. Is this justified or 7k is just fine..?

If there is a thread covering this kind of job (as I'm sure there is) can you please link me? I am on my phone and it is really hard to search. If my questions/choices seem noob - please don't abuse! I am here to learn, let me know why i am an idiot with justified and rational claims.

Cheers dudes!

for 300whp you can avoid a lot of this stuff!

Turbo (i haven't decided what brand or comp housing sizes yet, advices please? High flow the standard and you can achieve this. Just ensure you have an aftermarket dump pipe! will help alot

High mount manifold (i would need a new exhaust made up to suit new manifold yes?) not required

Fmic (was thinking plasmaman?) FMIC is always good and should be one of the first things to drop intake temps

Fuel pump and regulator (bosch 044 should suffice) Excellent idea and also walbro are also excellent value

Injectors (no clue how large i would need to go) plenty of bolt in options here depending on what you want to do

Forward facing plenum and fuel rail (probably go for a greddy) over kill IMO however does reduce the pipe work in the engine bay. Also plenty of options for this

Breather catch can (make the rocker covers look a little nicer...) this can be skipped as the factory breather option is pretty good as it is. Can add a tank however i doubt your car would require this at any point with the power you require unless you are going to track it

Cams (tomei poncams yeah..?) not really worth if for the small amount of increase in power to cost! spec ially if you keep the standard turbo and high flow it

Do i need a new throttle body? Are there good conversion kits avaliable? I've heard i need a metal head gasket at 300hp? But also heard if the head is torqued properly there is no need... If i do need the gasket, while the head is off do i get it ported and polished? And maybe shave 20thou off..? ( :P) is there anything i am missing? Oil and water pumps should be fine ay? all this should be fine! no need to change any of that stuff as these are more than capable of holding the power you are asking for! no need to shave head or change head gasket

all in all 300whp is easily achiveable with next to no changes with what you got but as GTSTTRK stated there is plenty of info on here

Suss the dyno results for this. Plenty of info there in relation to what people are running. Sticky at the top of the FI section.

IBTL&flamming brah

And what is wrong with wanting peoples Advice? What's wrong with my dyno results?

240rwHP sounds gay. A Neo engine should be able to go to the 210 - 220 rwkW region on standard turbo and injectors, with management change. That's already pushing your 300 rwHP level. I'd be wanting to know why there isn't more power coming out than you report.

And most engine failures are not from over revving. They are in fact from hitting the rev limiter. You're perversely better off to lift the limiter to a higher value and stay off it.

I have the dyno sheet here http://imageshack.us/scaled/landing/208/dynos.jpg

Running 13.5psi.. So you think something is wrong with my engine..?

Why is it so bad to hit limiter? I have heard it's cause the oil pump shits itself on limiter..?

all in all 300whp is easily achiveable with next to no changes with what you got but as GTSTTRK stated there is plenty of info on here

Yeah i think i will have to search a little harder.. I will also have to look at high flowing my existing,, i have never contemplated that option.. Cheers!

No one is slagging your dyno result. What they are saying is read the sticky thread at the top of this page called Rb25 Turbo Upgrade, All Dyno Results that reports what other people have done so you can see what is required to make your target power.

e.g. you don't need a ff plenum but if you really want one just use your stock throttle body. You don't need a new head gasket ot fuel pressure regulator or exhaust manifold or cams.

I have the dyno sheet here http://imageshack.us...g/208/dynos.jpg

Running 13.5psi.. So you think something is wrong with my engine..?

Why is it so bad to hit limiter? I have heard it's cause the oil pump shits itself on limiter..?

Two things. As I said, a Stock Neo with the boost wound up and some engine management should be able to do about 280 - 290 rwHP (about 210 - 220 rwkW). And that's on about 12-13 psi of boost. The second thing is that running an RB25's turbo at 13.5 psi is asking for it to explode. You need less boost, and you would want to be making more power already.

If that chart is from a low reading dyno - it's a very low reading dyno.

Two things. As I said, a Stock Neo with the boost wound up and some engine management should be able to do about 280 - 290 rwHP (about 210 - 220 rwkW). And that's on about 12-13 psi of boost. The second thing is that running an RB25's turbo at 13.5 psi is asking for it to explode. You need less boost, and you would want to be making more power already.

If that chart is from a low reading dyno - it's a very low reading dyno.

Yeah I asked the guy who tuned it if 13.5 is too high, because from what I have read 12psi is as high as you should go.. He said it is fine until 14... But yeah, when I got it dynoed stock standard I got 235rwhp at imports101 dyno, my retune with my ecu and ebc only got 240, but it was from c-red's dyno. I agree the dyno results are low, and looking at the rb25det thread (which I should have done in the first place) it should be making around 260+ rwhp.

Sorry for not reading that first guys, I must have skipped over it when I was flicking through this on my phone..

Either way, I will look into highflowing my turbo. Plasmaman also has a nice fmic+plenum+tb kit for 3k which I may also get. Probably sard800cc injectors and bosch044 fuel pump + turbosmart fuel regulator. Should easily push 300 then.

I am still keen to see what people think though, I am always happy for advice.

Its a lot of money to make a R34 Gtt engine bay look prettier, and for your power goal its not needed to make it, only the looks will benefit.

For the power you want you could have an engine bay that looks completely stock, so no hassles from the Police, money left over to spend on suspension and brakes.

I did all the suspension to work on mine first, and with the stock turbo maxed out it was a damn fun car, responsive and handled like a dream.

I made 330hp OR 246kWs on dead stock motor, stock the works, except injectors & afm with a HKS2535...

Honestly you don't need all the mods you listed at all.

Turbo YES

High mount manifold NO, STOCK

Fmic YES, JUST GET YUMCHA

Fuel pump YES and regulator NO, STOCK

Injectors (no clue how large i would need to go) YES

Forward facing plenum and fuel rail (probably go for a greddy) NO, STOCK

Breather catch can (make the rocker covers look a little nicer...) NO, DON'T NEED, U NO TRACK

Cams (tomei poncams yeah..?) NO, STOCK

Do i need a new throttle body? NO, STOCK

Are there good conversion kits avaliable? I've heard i need a metal head gasket at 300hp? But also heard if the head is torqued properly there is no need... If i do need the gasket, while the head is off do i get it ported and polished? And maybe shave 20thou off..? ( :P) is there anything i am missing? Oil and water pumps should be fine ay? NO, NO, NO WASTE OF TIME AND MONEY..

Use the change, take your missus to a nice restaurant a weekend away... even put the change into your mortgage.

Thanks for all the help guys, I guess I am biting off more then I can chew. I do think I should put more money into suspension and braking.. I would like some decent brakes and bigger swaybars.. Cheers for the advice, I will take everyones into account. Stay tuned for results.

Thanks for all the help guys, I guess I am biting off more then I can chew. I do think I should put more money into suspension and braking.. I would like some decent brakes and bigger swaybars.. Cheers for the advice, I will take everyones into account. Stay tuned for results.

GTT brake set up is quite good - check the rotors and if they are within the limits of wear maybe a light skim and have a read of the brake threads for some pads suitable for your use. Braided brakes lines and a master cylinder stopper are nice and fluid probably hasn't been changed so get some Motul RBF600 or similar.

A set of heavy sway bars will transform cornering. :yes:

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Who did you have do the installation? I actually know someone who is VERY familiar with the AVS gear. The main point of contact though would be your installer.   Where are you based in NZ?
    • Look, realistically, those are some fairly chunky connectors and wires so it is a reasonably fair bet that that loom was involved in the redirection of the fuel pump and/or ECU/ignition power for the immobiliser. It's also fair to be that the new immobiliser is essentially the same thing as the old one, and so it probably needs the same stuff done to make it do what it has to do. Given that you are talking about a car that no-one else here is familiar with (I mean your exact car) and an alarm that I've never heard of before and so probably not many others are familiar with, and that some wire monkey has been messing with it out of our sight, it seems reasonable that the wire monkey should be fixing this.
    • Wheel alignment immediately. Not "when I get around to it". And further to what Duncan said - you cannot just put camber arms on and shorten them. You will introduce bump steer far in excess of what the car had with stock arms. You need adjustable tension arms and they need to be shortened also. The simplest approach is to shorten them the same % as the stock ones. This will not be correct or optimal, but it will be better than any other guess. The correct way to set the lengths of both arms is to use a properly built/set up bump steer gauge and trial and error the adjustments until you hit the camber you need and want and have minimum bump steer in the range of motion that the wheel is expected to travel. And what Duncan said about toe is also very true. And you cannot change the camber arm without also affecting toe. So when you have adjustable arms on the back of a Skyline, the car either needs to go to a talented wheel aligner (not your local tyre shop dropout), or you need to be able to do this stuff yourself at home. Guess which approach I have taken? I have built my own gear for camber, toe and bump steer measurement and I do all this on the flattest bit of concrete I have, with some shims under the tyres on one side to level the car.
    • Thought I would get some advice from others on this situation.    Relevant info: R33 GTS25t Link G4x ECU Walbro 255LPH w/ OEM FP Relay (No relay mod) Scenario: I accidentally messed up my old AVS S5 (rev.1) at the start of the year and the cars been immobilised. Also the siren BBU has completely failed; so I decided to upgrade it.  I got a newer AVS S5 (rev.2?) installed on Friday. The guy removed the old one and its immobilisers. Tried to start it; the car cranks but doesnt start.  The new one was installed and all the alarm functions seem to be working as they should; still wouldn't start Went to bed; got up on Friday morning and decided to have a look into the no start problem. Found the car completely dead.  Charged the battery; plugged it back in and found the brake lights were stuck on.  Unplugging the brake pedal switch the lights turn off. Plug it back in and theyre stuck on again. I tested the switch (continuity test and resistance); all looks good (0-1kohm).  On talking to AVS; found its because of the rubber stopper on the brake pedal; sure enough the middle of it is missing so have ordered a new one. One of those wear items; which was confusing what was going on However when I try unplugging the STOP Light fuses (under the dash and under the hood) the brake light still stays on. Should those fuses not cut the brake light circuit?  I then checked the ECU; FP Speed Error.  Testing the pump again; I can hear the relay clicking every time I switch it to ON. I unplugged the pump and put the multimeter across the plug. No continuity; im seeing 0.6V (ECU signal?) and when it switches the relay I think its like 20mA or 200mA). Not seeing 12.4V / 7-9A. As far as I know; the Fuel Pump was wired through one of the immobiliser relays on the old alarm.  He pulled some thick gauged harness out with the old alarm wiring; which looks to me like it was to bridge connections into the immobilisers? Before it got immobilised it was running just fine.  Im at a loss to why the FP is getting no voltage; I thought maybe the FP was faulty (even though I havent even done 50km on the new pump) but no voltage at the harness plug.  Questions: Could it be he didnt reconnect the fuel pump when testing it after the old alarm removal (before installing the new alarm)?  Is this a case of bridging to the brake lights instead of the fuel pump circuit? It's a bit beyond me as I dont do a lot with electrical; so have tried my best to diagnose what I think seems to make sense.  Seeking advice if theres for sure an issue with the alarm install to get him back here; or if I do infact, need an auto electrician to diagnose it. 
    • Then, shorten them by 1cm, drop the car back down and have a visual look (or even better, use a spirit level across the wheel to see if you have less camber than before. You still want something like 1.5 for road use. Alternatively, if you have adjustable rear ride height (I assume you do if you have extreme camber wear), raise the suspension back to standard height until you can get it all aligned properly. Finally, keep in mind that wear on the inside of the tyre can be for incorrect toe, not just camber
×
×
  • Create New...