[Vladyslav Chelborakh]

Hi guys, after Big Brembos install car accelerates a lil bit slower, so I'm going to make it a bit quicker. I was thinking about FI especially turbo, but it looks that a lot of custom work needed and now it is not possible. I'm going to stay N/A and already have bought 1port NX Nitrous kit from NX.

I have read that it is safe to run 50 shot on stock internals, so my plan is:
1) Already have DC Sports CAI, so nitrous injector can be installed there
2) I'm going to get rid of CATs and run almost straight piped ( Sport CAT and Sport Resonator with Borla PRO XS mufflers ) with tune expect at least 180 hp;
3) Automatic transmission requires better cooling so I've bought additional trans cooler named Hayden (the most big size) and Mahle thermostat for winter period to prevent overheating.

4) Already ordered fuel pump from GT model. GS pump has 60l/h but GT has 140 l/h ratio. So it looks to me that such a pump even OEM can handle nitrous. (please correct me if I'm wrong or can't install GT pump to GS)

5) Don't know should I get bigger injectors or not ( maybe subaru 440cc or 4b12 injectors )
6) Guy that will tune it says that Unichip computer will fit good for timing advance ( maybe fuel can be tuned as well )
7) Need 1-2 step colder plugs to prevent detonation and glow ignition.

8) I've seen a lot of videos from Youtube that guy makes 100 hp shot on his auto trans GS, looks pretty good but dangerous for me to run 100 on stock internals.

9) My desire is 230-250 hp result with 50-75 shot using such a setup.

Waiting the response from guys with experience. Thanks and have a good day

 

[Vladyslav Chelborakh]

4: It's the same pump. Your info was wrong. I was running 15psi boost on the stock GS pump as well. It's a 240lph pump, same as an Evo
5: Yes go bigger. If you're going OEM, 565cc Subaru are a better choice. Beware, they're not as good to tune with as an aftermarket performance injector, and most of them don't flow 565cc
6: these cars don't respond well to piggybacks. For $550us you can buy actual tuning software for the stock ECU and be able to change basically everything.
7: stock plugs are already cold. Going 2 steps colder will likely result in issues when not running the nitrous. I haven't had issues on stock plugs at 28psi boost
8: a lot of math involved. Keep torque under 250lb-ft
9: that's fine

Thanks for response will try, what about the tune, how can I get it ?

4: It's the same pump. Your info was wrong. I was running 15psi boost on the stock GS pump as well. It's a 240lph pump, same as an Evo
5: Yes go bigger. If you're going OEM, 565cc Subaru are a better choice. Beware, they're not as good to tune with as an aftermarket performance injector, and most of them don't flow 565cc
6: these cars don't respond well to piggybacks. For $550us you can buy actual tuning software for the stock ECU and be able to change basically everything.
7: stock plugs are already cold. Going 2 steps colder will likely result in issues when not running the nitrous. I haven't had issues on stock plugs at 28psi boost
8: a lot of math involved. Keep torque under 250lb-ft
9: that's fine

 

[Vladyslav Chelborakh]

Got another question about stronger engine components.
I already have ARP head studs, planning buy ACL bearings and evo 9 rods.
Looks like after install this components engine should be stronger, and easy handle expected power gain.
By the way it is possible to create custom stronger pistons maybe cast but (11.5:1 ratio)
So the basic question is should I install stronger components to engine for nitrous or keep it stock

 

[Vladyslav Chelborakh]

Guys, thanx for your comments, but let's proceed I have a chance to run 100 octane, can I upgrade my ratio to 11:5:1 for example using 4g64 pistons and thicker gasket, to have at least 200 hp without nitrous.