No possible even with catless downpipes.
Dude, please stop, you are going to get flamed. The only way to make even close to 500RWHP with the stock turbos is with full downpipes, upgraded HPFP, LPFP, heat exchanger, 80mm intakes and ethanol. Even with that you are pushing the stock turbos so hard, and have spent so much money, you should look into upgrading the turbos. Also, ask any tuner, you cannot push the stock turbos without at least 2.5-inch lower downpipes, because the stock lower cats are so restrictive they cannot turn up the boost to make solid power without the engine having to pull timing and getting a ton of knock retard due to the heat from the turbos.
. If you are putting in new turbos you would need new upper cats because the stock ones will not work, and if you are putting in new turbos, and talking about not changing out your upper cats, then it's a moot point. I am trying to be helpful, but you are saying nonsense.Who said anything about stock turbos
I asked a question about what I need to get there. If I need to do downpipes, I'll do downpipes lol. I also have no problem with removing lowers.. like I said, primary cats, I'd prefer not to touch. Go back to Facebook if you're not going to be helpful ¯\_(ツ)_/¯
You realize the alpha 5 package has HPFP, LPFP, Intercoolers and like every single bolt on mod possible and it barely make 500 RWHP. It's just not feasible to make 500RWHP on these cars without throwing a ton of mods at them. And trust me, I know what the hell I am talking about.
Yeah I figured stock dp wouldn't really work. Seems like the stock turbos might be the biggest limitation in terms of reliability at least.
Do you have a Dyno chart, haven’t seen one at 500 yet, would love to see with stock turbos.
My stock turbos are relatively maxed right now as far as 93 pump goes. To keep them reliable, my boost peaks at 20 psi then tapers off in the upper RPMs. They're basically at the limits of their efficiency. 446whp/477wtq
It's a reliable and relatively obtainable target, w/o going absolutely bonkers on mods. Going E85 realistically would dang near double what I've already spent on the car by the time you're done with the full conversion kit, pumps, re-tuning, etc. The car is already squirrelly as heck and a handful on the streets. Your chassis will handle it better being a Nismo and might make a touch more power with the upgraded ignition system & improved cooling. Either way, ~450whp is a lot of fun in these cars!
450-500 is the sweet spot! My last car was slightly higher than that and we were creeping into being too quick.