Jump to content
SAU Community

Recommended Posts

Hi Guys.

So I'm in the process of testing a Sniper NOS kit in my NA 25GT R34.

Everything is installed and working, including both the nitrous arming switch and micro switch which is enabled on when foot is to the floor on the accelerator.

I've tested it by pulling off the intake and putting my foot down while the NOS is armed and it sprays fine.

I went for a test drive last night after completing the setup but when I had my foot down, i didn't feel a noticeable difference (75HP Jets). It felt like the car was starving.

Has anyone dealt with nitrous systems before running a stock fuel pump and encountered this issue? I started off testing with the 35HP jets and had a similar issue, so I'm just trying find where the problem is.

P.S. anyone have a rough idea how much nitrous a stock RB25DE would be able to handle? I've got aftermarket extractors and a 2.5" cat back exhaust

Thanks!

Link to comment
https://www.sau.com.au/forums/topic/452651-nos-in-r34-rb25de/
Share on other sites

need a tune or nothing will happen, not to mention your afr's will be all over the place!

could potentially be damaging your engine, also don't you need an injection of fuel next to the nos jets?

I've never used nos and only know this from seeing other cars setup.

2 guys above, do you realize the sniper is a wet kit,?

Meaning fuel gets injected along with the nitrous.

Of course going onto a Dyno would be the easiest way to sort it, but as a budget approach not always an option.

I would be closely monitoring fuel pressure as the stock pump might not be up for it.

Based on how tough rbs are I would think they could take a fair bit if nitrous, what the factory ecu does is another story.

By your explanation it sounds like the pump isn't up to it.

Also you can buy wideband o2 kits for under 150, that would be a wise investment.

Good on you for gassing it!

  • Like 1

Hey guys,

Thanks for your input.

I figured out the reason it wasn't working correctly and it was because the fuse was tripping. I had it wired to the cigarette lighter. I wired it directly to the battery with a fuse in between and seems to be working fine. Not sure why it felt like it was starving tbh :/

Had the car on the dyno today and 75hp jets gained me 35hp atw. Will be putting 125hp jets in at the drags next time I'm there and see how it does. Fuel pressure was fine, but it sure didn't feel like it when i tested it, still surprised of what the cause of it was.

An aftermarket ECU for it will make a big difference according to the bloke who dyno'd the car.

Now... to look for an aftermarket ECU for an r34 rb25de neo. Anyone know of any available? Any help will be appreciated!

Thanks

2 guys above, do you realize the sniper is a wet kit,?

Meaning fuel gets injected along with the nitrous.

Of course going onto a Dyno would be the easiest way to sort it, but as a budget approach not always an option.

I would be closely monitoring fuel pressure as the stock pump might not be up for it.

Based on how tough rbs are I would think they could take a fair bit if nitrous, what the factory ecu does is another story.

By your explanation it sounds like the pump isn't up to it.

Also you can buy wideband o2 kits for under 150, that would be a wise investment.

Good on you for gassing it!

Sorry to hijack the thread, where can I find this wideband for under $150? I can't seem to find one for under $450, thanks.

Sorry to hijack the thread, where can I find this wideband for under $150? I can't seem to find one for under $450, thanks.

Crazy cheap

Scotty nm35 recently bought one.

http://www.wide-band.com/widebandproducts

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

    • 65601-05U00 is the hood latch. 62550-08U31 is the support that holds it to the radiator core support. They are all super discontinued so I don't really have any great leads on how to source this stuff.
    • GTSBoy on your suggestion on another thread I had a look at those injectors and ended up getting them because of the quality.  Got the expensive ones.  
    • Hey guys been looking everywhere to try and find the correct gtr hood latch support part number but only found the first half and when I search with that number it sends me to an r34. The first part I found was 62515. If anyone could help me with the rest then I’d really appreciate it. Or if there’s some alternative hood latch support that would work even better cause I can’t find any for sale. (Searched on upgarage, partsouq,buyee,rhdjapan) 
    • If you've only done the upper control arms on the rear, AND you have changed their length (by more than about 1mm) to set the camber you want, then you will definitely need/want to install traction arms also. Adjusting the camber arms on their own WILL introduce bump steer and make the car unpleasant to drive. Most owners have no idea that their car could behave infinitely better than what they put up with. I'm not entirely sure what the Stageas need, but I am thinking that unless you have massive front spring rates and pretty soft rear springs, you have waaaay too much rear bar. Oversteer city, in my estimation. Combined with possible excessive bump steer from maladjusted arms, that could be a recipe for nastiness. ATR43SS2 is not a highflow. It is an outright replacement turbo. It's a little bit bigger than the largest highflow profile that Tao does. Probably a solid 300rwkW turbo where the bigger highflows will be about 30-40rwkW less. Nevertheless, we're only talking about ~300 rwkW, which is well within the abilities of the stock ECu to run with a Nistune on board. I would do so without hesitation - and I will be doing so when I get my finger out and actually get the injectors and AFM installed. But, if you would prefer to drop a whole lot more money on the ECU side, then I suspect you're looking at Haltech. The Haltech fanbois here will all spout on about all the available engine protection you can have, that you can't have with the Nistune option. And they're right. But it doesn't really come for free either. You will spend more money on extra sensors and the like, plus the work to install them. If the engine was built and therefore represented a big investment to protect, then I'd say definitely do it. If you view the current (and forever into the future) shortage of replacement engines as something to prompt similar protection, then also, do it. If you see a destroyed RB25 as an opportunity to put in a Mercedes or other V12 (like I kinda do)... then your perception of the risk/reward might differ. These are good injectors. You can also get a "better" set of the same with more flow matching, for more $$. 1000cc is where you will want to be. You will need an R35 AFM and adapter tube if you want to stay with Nistuned stock ECU. Otherwise, if going Haltech, you can ignore. As for intercooler. Just about anything will do. You're only talking about ~300rwkW. Just put a big core in there. Be aware that return flows do add significant pressure drop and will cost power and will make the turbo work harder to achieve the same goals. If you can manage a proper crossflow, do it. I'm keeping my very good return flow because I'm only expecting to be in the ~250rwkW range, and will live with whatever outcome I get.
×
×
  • Create New...