with intake, header, exhaust, and new pulley

current set up and later/soon:

injen RD series intake - not that much gain
tanabe SMH exhaust - very little if at all gain
xs power header (not installed yet) - 15-20HP?
UR ultra sc pulley (need to make that order soon) 6-7HP something like that (stock size pulley produce 1 less HP or something i heard)

not exactly positive how much the xs header will increase.

after all this, maybe a little over 285-ishHP range?

 

i rarely check out the dyno forum and havent done shit to the motor yet but from what little ive read, your far from 285. at the wheels i think we're around 210-220 stock. my totally uneducated guess would be around 230-235

 

well are u auto or 6 spd

 

Are you a type s? cause that'll make a huge difference. Its hard to get a CL-p/TL-p to have 285hp. I think at the crank/flywheel you'll have about 285 if you had all those mods. Maybe more? I could be full of crap

 

im guessing hes talking about hp at the crank and not at the wheels

 

i'm guessing it's at the crank. there is no way you can get that kind of numbers at the wheel with just bolt ons. if ur a type-s my best guess would be ~230, but so many other variables at play here. best thing to do is just dyno it if you really want to know

 

Auto your looking at around 238ish at the wheels. 6MT around 245.

 

auto type s. yes, im talking about the power at the crank for now. but i guess my answer to the wheels is already answered (was gonna ask that later).

 

There's no real way to test crank unless you use an engine dyno. Any numbers you get other wise are guessestimates.
Real world is WHP & that's what you can readily test.

 

yeah...

auto- stock 195whp + 6-8whp for intake + 25whp for headers + 7-8whp for pulleys = about 235whp estimated

with 25% loss on the auto's drivetrain you would be 313 at motor [a.k.a. crank]

but really only Whp counts!! i wouldn't brag bout 313 b/c 25% loss is HORRIBLE! so your car would NOT be even close to as fast as a RWD/AWD car w/ 313crank...if people ask, just say 235 and stress at the wheels.

btw 350z gets 240Whp, mazdaspeeds get 225Whp, evos/STIs get 250Whp, E46 M3 gets 280Whp...just so you know where you are...

it is money well worth it tho!

 

FWD drive loses significantly less HP in the driveline than RWD and a shit ton less than AWD. There's less friction and a whole lot less driveline mass in FWD. The torque converter eats a fair amount more than a clutch though.

Where is this 25% number coming from? It sounds a bit high as does the 313 chp number.

 

25% is kinda the standard loss calculation for an automatic. It's just a number used when using a chassis dyno. There are flaws with using this type of calculation.

Here's someone's rant on the topic:
http://forums.tdiclub.com/showthread.php?t=75062

 

hmmm, where could that be comgin from. if you search whp on auto [we'll just stick to the auto here], you get 195whp. but doesn't the company say 260HP crank? well how can the engines 260hp become only 195 when finally at the wheels? aha! drivetrain loss! and when you take the 65HP loss and divide by 260, you get a 25% loss.

this is how i always understand it, and my 2 years of research tell me i'm right.

also, if you take the STI for example, it has 250Whp, but company claims 300 at motor. 50 divided by 300 is a 16.7% loss when the power goes from motor THROUGH the drivetrain to the wheels.

just for example, but i used to think like you. if the AWD has ALOT more moving parts, shouldn't it lose a lot more power through all of those?? well maybe technology got better but that isn't the case at all!

same for RWD 350z gts 240whp [look it up!] but 300 at crank, etc.

 

I find it hard to believe that Evos/STIs are putting down that much at the wheels with AWD. Hows the 350Z loose so much more then they do?

 

and i read your link there. HP numbers are admittedly a mess! thats why threads like this are started and get so far.

what i wrote above is how I think about it. now when i treat every car the same knowing their crank and whp numbers, then i can now know where cars stack up with each other. there is flaw in my ways, but at least i put some order in this madness. lol

 

idk i put that number in my head. sometimes i search on google and write something like "stock sti HP numbers at wheels"

just like here on acurazine, there are dynographs on so many cars that can be found.

maybe im wrong? but again i think i saw that one time and put that in my head...


hmmm...im gonna search some more.

 

More importantly, does a CL-S6 with a header stay with a 350Z from a roll as they would have similar HP at the crank?

 

I've said it before and I guess I'll say it again, you can't take the advertised gains from multiple bolt ons and just add them up and figure thats how much HP you have now, it just doesn't work that way.

If a bolt on advertises a 10 hp gain, that is 10 hp at one specific part of the RPM range (peak gain of 10hp @4500 rpm for example) and there is a much smaller gain (or even a loss) at other RPMs. Headers typically hurt low end power in favor of making more high RPM power.

Light weight pulleys are a different story as they don't actually make any power, they free up power that was being wasted turning a heavier pulley.

 

When you're comparing a car that was meant to be smooth and luxurious while still retaining some sporting intent to a car that's balls to the wall performance, you're going to run into problems. A car like the STi is going to have it's driveline engineered for minimal loss at the expense of comfort, since comfort isn't a high priority for that market. They use lighter components and solid mounts in a car like the STi instead of dynamic mounts they use in a car like the CL. There's less loss but a lot more vibration and harshness makes it way to occupants of the vehicle.

I can see the 25% loss for the automatic being possible, it's just high (shockingly so actually). I would also not be surprised if the STi (particularly in a manual) had lower driveline loss but the numbers you stated sound questionable. I would not expect it to be that much less with two more differentials in the system as well as the added mass of all the extra axles and two more driven wheels.

 

I have everything but the exhaust. I would say with an exhaust roughly 290 hp at the crank, but only 232-235 whp. An 03 evo 8 stock the one that produced only 271hp you should be able to take with those mods in the top end.

I can say don't mess with a 350z unless you are forced induction. All the bolt ons will make the guy in the Z car sweat it a little bit but he will always be out of your reach if he can drive. manuals with all the bolt ons have a chance against the Z.