What is stock hp for 2009, 370z?
 

Hey guys,

Yesterday, i went for a dyno with just a HKS exhaust and HFC installed. I was expecting for at least 340hp. But I was disappointed as i saw only 316.5hp on the sheet. It's impossible for me to lose HP because the car is faster. So, i want to ask you guys what is the stock HP? Is it really 332? or 290 or something? Where did it go wrong? Maybe a dyno problem?

Thanks

332hp is flywheel. The Z puts down around 265-275 hp to the wheels on a dynojet.

But you don't want to be too concerned about numbers because every dyno puts down different numbers.

How much have you spent on mods?

332 to the engine not to the wheels. when i took mine to the dyno i got 290 whp on a stock run. ( 7at roadster) at vinny ten raceing. i think u did great.

Sorry, i don't understand what is flywheel.

Spent 3.4k on exhaust and 700 on custom HFC

cool. i understand now. so, the engine produces different HP and the wheels are different too? so, 316.5hp whp is good?

I got 297rwhp on a dynojet, stock, base model, manual transmission.

It's basically how its measured. Since your measuring at the wheels, there is drivetrain loss due to the inherent nature of moving parts. 316.5hp at the wheels could be as high as 370-380hp at the flywheel. This is just a rough estimate since there are a lot of factors to take into consideration.

Yes 316 is good. Every single hp claimed to a car is at the flywheel. Like a zr1, says it makes 6xxhp but if you put it on a dyno it will make 530whp or so.When you dyno just the engine you get the brake horse power (bhp)/ power at the flywheel. Like this
YouTube - ‪4 ROTOR ENGINE DYNO VIDEO 1664HP 1158lb/ft‬‏

Then when you put it in the car it will lose horsepower if you dyno it because some power is lost when taking it to the wheels. generally a 10-15% for rwd and 25% for awd because it has to take the power to 4 wheels instead of 2.

YouTube - ‪370z Dyno Test Results‬‏

By the way is this your first car?

Edit: why would you spend 3.4k on exhaust? which kind? should've turbo'd it with that money.

:icon14:

Tbh, the dyno number is meaningless without a baseline run.

yeah, it's the first time i ever mod a car. I bought the HKS exhaust. How much is the turbo kit? it's around 8k U.S no?

Those are good numbers dude. Stock HP is 332 at the crank, where the initial power comes from. But some of it is lost through the drivetrain, so WHP are the "real" numbers. Because some drivetrains are better than others, WHP is the best way to measure power output.

I don't mean to hurt your feelings but it seems you lack some basic knowledge. And I can't help but imagine you paid too much for basic exhaust mods. I'm not knocking your exhaust choice, I'm sure its great. But you seem a little naive to me, so I only want to help you. You could have gotten to 316HP with a lot less money. I mean that with the utmost respect.

Yes this guy is totally new to modding but, you gotta remember he's not from the U.S. so im pretty sure he has to pay more for import fees or whatever they're for. We are all here to help you, just read around some and read on different mods and how they help so you can go the best route wether on a budget or trying to get the best #'s etc..

Oh, you're right! sorry OP. In that case, it sounds more reasonable.