Jump to content
SAU Community

Recommended Posts

That's certainly surprising, is that including the swap to external gate?

Currently deciding if I should bother with 6boob and gate for 280kw :/

hypergear has done the tests him self, larger ID exhaust manifold pipe will lead to more lag but better top end power, but not a huge amount mind you

hypergear has done the tests him self, larger ID exhaust manifold pipe will lead to more lag but better top end power, but not a huge amount mind you

Just had a read, the difference in response is only a couple of hundred rpm. Doesn't seem to be worth the $1000++ at 300kw power level for an extra 10-20kw on top of the stock mani.

Edited by owen1r

Cool thread, kinda along the lines of what I'm doing - subscribed and will share my results along the way

Hoping for a close to stock response 230-240kw, which will be exactly what I'm after

My setup will be -

HKS 2535 turbo, hoping to run around 18psi (have turbo but not installed yet)

Split dump pipe - installed on stock turbo at the moment, quite a decent length split section

Nistune - installed

Autobahn88 intake pipe - installed

Injector wise, im either going to use a set of R35 GTR injectors, from what I've been able to work out they are 560cc and direct drop in, or a set of larger injectors if I wanted to go E85

I'm guessing the stock AFM will need to be upgraded to a Z32 or R35 GTR unit

Look forward to seeing the OP's results

  • Like 1

Larger manifold/runners would reduce exhaust velocity/pressure. Good for high hp, not so much for response.

I'm now starting to consider the HyperGear 21U highflow as an option. I had the OP6 highflow previously and it was lacking slightly in response. Maybe the 21U will be a sweet middle ground.

This is 100% correct the OP6 highflow will cause a fair bit of lag, I myself just got a 21U highflow and am taking out my OP6 highflow as i want response. You will only lose about 10rwkw of top end power. Another member on here helped me make my mind up he said he had owned a skyline with a OP6 highflow and one with a 21U, on a dyno the OP6 made more power but on the street the 21U felt alot faster. Will have more info once I get mine installed and retuned :)

Edited by DoseVader
  • Like 1

If you use the JJR dump, it might need some work with a die grinder to match the turbo, there is a few threads on grinding to suit.

Or do what I did and cut the lower half away and open it up.

As purchased

IMG_0013_zpsb44ba558.jpg

Modified

IMG_0065_zpsafhuqu6f.jpg

Unmodified, there was a 10mm step at the bottom of the flange, die ground as much as I could but still wasnt happy, so started cutting! lol

I have a hypergear op6 highflow, and the highflow machining eats into the flange area, possibly more than a 21u highflow

  • Like 1

Cool, I'm guessing I'll need to mod mine a touch to suit the 2535

Can anyone confirm is 230kw is possible using stock Neo injectors and air flow meter?

Pretty sure both max out at around 220-230rwkw

Yeah, you'll likely be over the top of both by the time you get to 220rwkW. Not wise to try to run past the max, so you're kind of forced to upgrade. Sucks having to upgrade for +10rwkW, so that's probably why most prefer to aim for 240+.

Yeah figured as much, I'll see how it goes

This is 100% correct the OP6 highflow will cause a fair bit of lag, I myself just got a 21U highflow and am taking out my OP6 highflow as i want response. You will only lose about 10rwkw of top end power. Another member on here helped me make my mind up he said he had owned a skyline with a OP6 highflow and one with a 21U, on a dyno the OP6 made more power but on the street the 21U felt alot faster. Will have more info once I get mine installed and retuned :)

Good feedback. ~500rpm response difference on a dyno graph doesn't look like much, but I think real-world driving response will be greatly improved.

Will be taking my 21U to HyperGear in the coming weeks, and will post back to back results compared to the OP6 unit.

Injector wise, im either going to use a set of R35 GTR injectors, from what I've been able to work out they are 560cc and direct drop in, or a set of larger injectors if I wanted to go E85

560cc should be able to support 240rwkw on e85.

560cc should be able to support 240rwkw on e85.

Yeah, however I'm not sure if the VR38 injectors would cope well with E85 overtime?

It's a bit of a dilemma really!

Nistune have the flex fuel upgrade also, so I think for now I'll stick with the stock stuff and see what they can do, then do the injectors and the Nistune flex fuel setup in one hit and have it tuned for 98 and E85

Would cams be good upgrade for response, considering price and in a similar power range (240-270 killerwasps)

Stock cams are the best for that, longer duration cams will shift the power/torque towards the higher end of the RPM range.

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

    • 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.
    • I have a heap that i have collected if you want some authentic ones still. Pm me if your interested!
×
×
  • Create New...