OK so I've done soil searching and yet to come up with some answers so OK asking you guys. I've got a HR 350z with exhaust and I'm looking into nitrous now I'm curious to what the HR puts down with say a 75 shot. Torque? HP? Is it worth it with just a 75 shot? Thanks guys

 

that should be perfect.. i have a 04 i had a 75 shot. a great mod for cheap .lol use it right and u will have a blast. id say around 60-80 more hp to the wheel man. some are dif

 

It doesn't matter where you start for shot size, you can always re-jet for cheap and go bigger later if you want more power.

For reference, my '08 made just over 240 whp on a very conservative dyno. Add in a 75 shot, you could expect to see over 300whp. On a generous dynojet, the ones where guys make 280 stock, then you could be close to 350whp. Don't worry about the dyno too much, the car will be much quicker regardless. Probably 112-114 trap with a 75 shot, assuming it's basically stock but tuned. I'm hoping to find out what a HR can do with some bolt-ons/tune and a 150 shot, hoping for 120+ traps

 

You need to post more on that in a new thread if and when that happens. I'd love to see a bottle-fed Z hitting 120+ traps. I guess it's possible since the stock HRs are trapping as high as 107.

 

On an HR with a "true" 150 shot I could see 118-maybe 120. That kind of trap on juice is a mid 11 at least all day on a dr or slick. The HR has been somewhat proven at the 500wtq area. You shouldn't be to adverse to moving up in shot size as your confidence improves (and driving ability). Just keep it in perspective and realize that things happen. Getting it tuned will cut out some of the potential pit falls.

 

Oh I definately will, but it won't be till after christmas at least. I gotta save my pennies to get Osiris. Getting closer though, some of the other parts are getting lined up...

First attempts will just be a basically stock car with a 100 shot, depending on how that works, i'll see what i can do. I'm basically settled on doing dual-stage, but the specifics will be trial and error depending on what I can get to the ground.

 

What do you hope to see in terms of benefits with the dual stage? You can plant the power with a 150 on a slick or larger sidewall dr.

 

Mainly, street-friendlyness. I will try first on street tires (285/30/19 Nitto INVO's now ), but as I graduate to more tire and lower ET's, the main advantage is to bring more nitrous online at a higher RPM, where it's less stressful on the bottom end. I can split it 100/100 or so for daily use, then switch the primary (launch) stage over to as much as the tires will take for track duty, then dial the seconday to as much as I'm willing to hammer the bottom end with. Spray and Pray I guess...

 

I can understand that, but with the added rev range associated with the HR.....one would think even with 150 coming on in the late 3k range or at 4k should keep it in one piece. Even the 100 shot will be worthless in terms of traction on street tires. You are going to need a tire to adequately plant that tq. Best of luck to you though.

 

What clutch are you going with? Your stock one won't hold out for long and with spray, it'll be toast before you know it.

While that may be true, the dual stage set up won't be as stressful on the drivetrain components, which is always a plus.

I don't have traction in 1st or 2nd with my 100 whp shot on street tires. Even with your higher redline and all, you probably won't be able to get the power down until the halfway through 2nd or until 3rd gear (if shot is 100 or higher).

200 shot is a lot, even for the HR motor I would think. It's probably doable with 2-stage or progressive set up, but I doubt it'll last long with that big of a shot.

+1 on needing sticky tires regardless of what your dual stage set up consists of.

 

I was simply pointing out that the higher rev range lessens the need or temptation to spray at a lower rpm. We basically agree. That's why I said the 150 at 4kish wouldn't be too overly detrimental. Agreed that it can certainly put stress on the motor. I actually think the dual stage sounds like a good idea, but it isn't by any means "necessary".

Got in before the ninja edit lol.

 

Yeah, I saw how fast you were replying so I knew you were gonna quote me before I finish with the edit.

Now I get what you're saying. I agree that you shouldn't have to spray under 4K since you launch above that (on sticky tires) and stay above that through each gear. I also agree that 2-stage isn't necessary but I can see how it would help reduce the shock of the nitrous torque.

However, I disagree that the higher rev range on the HR has anything to do with not wanting to spray at lower revs. Even with the DE you'll launch above 4K anyway and stay above that every time you shift into the subsequent gear. So, technically, the different rev range of the HR has no bearing. Plus, you don't really want to spray too much under 4K anyway in any car.

 

I was referring more to his "street" driving (i.e. second/third gear roll situations, etc)......On a track it won't be an issue.

 

I dunno, I'm not gonna guess at it too much, i'll start simple and go up.

As far as a clutch, I don't know. I know the stocker won't hold the abuse for long, i'll see what I can do. I've had good luck with Exedy in the past, but I have no idea. It depends what deals are available when I actually buy one.

I feel the car will hold a 100 shot on street tires. There is just so much traction available right now, I know how well the Cobalt held the 60 shot, even with little 235/40/18 tires and being FWD, it could take it from 40mph or higher with no problem. I'll see what happens, but based on my past experience, I believe it will work ok.

For the track, I know real tires are a must to get real performance out of the car, i'd still like to try and touch 11's on street tires though, just to see if it's do-able.

 

I made around 365hp on a 100 shot at around 1000psi. On that same dyno I got around 272hp with boltons and Uprev tune.

I had the 100 shot on for quite some time and with 275 Eagle F1 GS-D3's it hooked up real well when the tires were warm. 1st was tricky but it hooked. 2nd was a blast.

Im back on the stock wheels now with Hankook Evo's 245/45. It doesnt at all untill 3rd gear with that small of a tire and that big of a shot.