it depends on the bolt ons.

going from the 3.12 to the 2.87 pulley is a bigger difference than going from the 3.33 to the 3.12 pulley. It's like 5-10 more hp difference than the 3.12 gives over the 3.33

otherwise adding cams, water injection, really aggressive timing, bigger exhaust/cats, etc can get you additional hp

I don't think people are giving timing enough credit. The stock vortech tune has drastically reduced timing and runs a little rich - mostly for the top end. Getting the car tuned leans out the A/F and possibly bumps the timing slightly. If you go nuts with the timing and take it all the way as far as it'll go until if you add anymore you actually lose power - and water injection and race gas is what lets you do something like this, there's a lot of power to be had when you consider how much retard the timing maps usually have with FI

 

Yes, but how much do you think these items alone add? With every bolt on out there, how much do you think you can get? If we go back to what you posted above, it was about 65 or so hp per stage. That's 130hp total for two pulley changes and all the bolt ons.

 

it's hard to say,

with the vortech, IMO the JWT cams add something around 15 whp or so.

When Sam was tuning my car and bumped the timing up just one degree, it'd gain like 11 whp. Try doing that a few times and the power is right there. The only reason he did that was because my water injection was lower the intake temps from 85 to 40 degrees consistently and I was running race fuel

Also leaning out the A/F to 12 with my full race gas map from 11.5 gained something like 5 or 6whp I think. Remember, I normally am at 455whp on my low octane map

If I had to guess, going from my nismo to APS with x-pipe exhaust probably gained like 5 whp...

 

I'm just trying to figure out where the mysterious hp is coming from.

 

This is th same Ricer Math Sentry has been doing for quit sometime . And he'll argue to the death before he gives in....stop playing his game . He gets his rocks off on it .

 

it doesn't seem mysterious to me. There's been a few people of people with vortechs with 470+whp

Mine makes 455 on pretty much normal gas with meth injectoin and 477 on race gas and meth injection

if you say your buddy with the 3.12 pulley did 420whp, what do you think he'd do if he had the 2.87, cams, water injection, race gas, and aggressive timing?

 

It's not that I don't think that there's power, but if the each pulley gives 10-20hp, then there's still ~100hp in all the bolt ons that you mention. I don't know if I buy that there's that kind of number in those mods. Race gas doesn't add hp. So basically there's plenum spacer/plenum, hfc/tp, exhaust, cams, water injection and tuning. I'm not sure there's another 100hp there.

 

the pulleys don't give 10-20hp

the 3.12 pulley gives around 20-22whp than the 3.33
the 2.87 gives 30-35whp more than the 3.12 pulley
so the 2.87 gives you around 50-55whp more than the 3.33

if an out of the box vortech setup on a bone stock car gives you around 330-340whp, and a basic standard tune alone on a stock vortech will bring it up to 360whp. Then the 2.87 will make things even more extreme bringing you up to something around 400-410whp.

Start adding in every possible breathing mod and you can gain up to 50whp. Add in more timing, and you can get more.

As you add more boost, differences in timing become more extreme. Adding a degree of timing when NA will give you something like 3-4whp, but with FI where you already have a lot of boost and a lot of extreme breathing mods, 1 degree of timing does a lot more than 3-4whp, it's more like 9-12whp. Booger can vouch for how much of a difference timing makes. His car might have blown up with his 21.7 psi cog pulley setup if he didn't pull extreme amounts of timing since the SS box doesn't know what to do with psi's that are beyond 16 psi.

Race gas doesn't add hp alone, but it allows you to add more timing without detonating. Water injection does the same thing because it lowers the intake temps so much lower that you can add timing and not have the extra cylinder pressure be a problem. People with FI always want to add more boost and pull timing or lower compression, but you don't have to do that if you have race gas and water injection

https://my350z.com/forum/showthread....t=vortech+dyno
as you said, you're doing 390whp with the stock 3.33 pulley. Get the 2.87 and get yourself up to 440-445whp...doesn't seem impossible to me. I don't remember if you have cams or not, but cams boost power too

there's been several guys with 2.87 pulley setups making 440-460whp on a dynojet. I'm just another one.
https://my350z.com/forum/showthread....t=vortech+dyno
There's been at least 1 or 2 guys who have posted dynos from AAM and CP Racing that had dynos at 450 and 460whp. I didn't break any records with my car or anything. I took things a step further because I have race gas and water injection and took advantage of adding more timing throughout the entire powerband to make even more power for my high octane map

here's my low vs high octane maps overlayed where the high octane map has more timing and slightly leaner A/F. It's not really a dramatic difference, but it does bump things up slightly. If it wasn't for that little spike (which might be a slight dyno error) at the very top of my 477.8whp run, the chart probably would have read as 465 whp. My low octane map stopped just before 6500 rpms. It would probably have been 460whp if taken to 6600 rpms.

If my engine would rev past 6600 rpms to 7000 rpms, it'd probably hit 490-500whp without much problem. If someone was so inclined, they could also switch the 32 tooth cog pulley to a 34 tooth pulley to gain another 20whp or so, but I'm probably not going to take it that far on the stock block. IMO a stroker kit with headwork and better valvetrain to rev to 7k rpms along with the 34 tooth cog pulley, and keep the 10.3 compression ratio, you could get around 600whp and 450tq without the need of a T-trim. The engine's natural power and higher reving would be mainly responsible for the increase in power

 

wow, nice...great info