horsepower to the wheels 300zx tt

[flclau]

I am wondering how much hp's I am losing to the wheels. It's just a guessing game until I get to the dyno but it's stage III, 12.5 lbs boost, JWT ecu, upgraded intake and exhaust.

[zhillz]

probably 600-700

[mewantkouki]

Banished to the lounge.

[David48]

I would guess you're loosing over 9000 horsepowers to the wheels until you swap in a b16. They're fwd engines so you don't loose as much horsepowers when you put them in your jdm drift machine

[flclau]

Ok I don't get how that's funny

[flclau]

Why even write something like that?

[mewantkouki]

Have 275 horses drag you in a 3600lb sled chariot style and shoot them in the head one by one until it feels as fast as your car. The number of dead horses = whp loss.









Seriously though, most would chalk it up to the 15% rule but that's not always accurate. There are a number of factors that determine horsepower loss. (Rotating assembly weight, temperature, humidity, etc.) Try a coast down test on the dyno.

[Z350man]

^^^ we love you man... you just earned my signature spot.

[Jr_SS]

I would personally put RWD powertrain loss at 20% or more. I had a buddy put down 280 crank hp in a honda. He laid down 220whp on the rollers once it was bolted to a trans, w/ P/S, A/C, etc.

[Blackzenki82]

here's one for the gurus....

1900lb full weight car (gas, fluids, driver, fuzzy dice etc etc)
250whp est engine (RWD)
48F 52R weight bias

1/4 mile time? (no calculators fags!)
track capability? (road racing/autoX)
driftability?


thoughts?

[Empire]

here's one for the gurus....

1900lb full weight car (gas, fluids, driver, fuzzy dice etc etc)
250whp est engine (RWD)
48F 52R weight bias

1/4 mile time? (no calculators fags!)
track capability? (road racing/autoX)
driftability?


thoughts?

1/4 mile time... too many factors to consider in order to get anywhere near accurate, but I would guess 12's. sub 12's wouldn't be unreasonable assuming traction and gearing and all that good stuff.

Track capability... With that weight, and weight bias, you could toss that thing around a track rather nicely, assuming a decent suspension set up and good tires. I'm kinda torn about AutoX, it would really depend on the power curve. If it is a really peaky 250, and high in the rpms, then it could be a real pain to keep under control because it is "so light" that it is easy to break traction and the ass is gonna want to swing out. BUT, again, that comes down to how much traction you have at your disposal. Could be a blast with enough traction.

Drift... I actually think it would be easier to set up for drifting than anything else. Should be more of a pleasure to drive too. It shouldn't take as much "work" to get it to slide around either. Shouldn't have to beat the car so bad to get it to slide around since it is light and not underpowered.

Thoughts... 1900 pounds is a pretty light goal to reach for, for a "fully loaded" weight. You would need to rework the chassis to weigh less than 1200 pounds. Assuming skinny driver, and 10 gallon fuel cell and a complete drive-train that weighs less than 400 pounds. My concern at that point would be that there wouldn't be enough steel around me to be safe. I would much prefer to keep my bodily injuries limited to when a dipshit drunk driver slams into my daily driver and not due to an error made while tandem drifting.
It can be done. But I'm picturing a complete custom tube chassis to accomplish it.
EDIT: but then again, I'm thinking 300zx's and 240s.... don't know much about the older Z's to know how far off that weight really is. I just know that you're loosing a lot of steel to drop a 240 that much, and literally, a ton to get a 300zx close to that weight.

[Empire]

I am wondering how much hp's I am losing to the wheels. It's just a guessing game until I get to the dyno but it's stage III, 12.5 lbs boost, JWT ecu, upgraded intake and exhaust.

that whole "stage" thing is stupid as shit. Stop using it. Only little idiot ricer fucks use that shit. Your car isn't a stage anything. It is a car, with some bolt ons. Trying to say your Z is a stage 3, 4, 5, or whatever just makes you look like yet another idiot fanboy that saved up enough money from selling their crappy ricer honda to buy something better. So as long as you refer to your car in "stages" no one will ever take you seriously and will continue to make fun of you, just like they are doing here. IF you want to be taken seriously, then grow up, loose the whole rider "stage" thing and insist that everyone else stop using that crap as well. When you refer to your car, you talk about it like a normal human being would talk about any other car. Example "I drive a turbo 300zx with basic bolt ons, Intake, Exhaust and a off the shelf JWT tune, running 12.5 pounds of boost" If you want to sound even more cool, you talk about what you've done to the intake and exhaust. Did you just swap out to a cone style filter, or are you running dual MAFs, or fake dual MAFs, or did you upgrade everything from the throttle body forward? What about the exhaust? Did you just change the mufflers? is it a cat-back upgrade? Did you gut the pre-cats (like an idiot considering how cheap a piece of pipe is and how much money you could have gotten for those pre-cats) Did you upgrade the down pipes? etc etc. As for your JWT ecu, what did you get when you got the ECU? Is it just off of the shelf for your intake and exhaust set up and for 12.5 pounds of boost? OR is it there "better" tune that is supposed to come with boost jets and is ment to run 15+ pounds of boost, and you just have it turned down to 12.5 to play it safe?
IF you want a more accurate idea of the power you are making, then you need to be more detailed in what else, if anything you have done to the engine, tranny, the drive train in its entirety.
But, given the info you have provided, I would expect to see between 330 and 350 whp. You can get more with a real tune, but typically those off the shelf tunes dump too much fuel (to compensate for greedy boost levels) and have really conservative timing.
As for how much you are loosing from the flywheel to the rubber, I would venture to say about 50 hp. That is right around that 17% "they" say is the rule of thumb. And from personal experience, sounds about right. I don't really agree with the whole 17% rule though as I don't see how it makes sense that the drivetrain only eats up 50 HP when you're making 340 ish whp, but turns around and eats up over 100 hp when you are making 700 whp. Doesn't quite make sense to me. From my experience, 50hp seems to be all the 300zx drivetrain eats up.

[flclau]

Ok thanks.

[flclau]

That helps a lot.

[KRUKED]

/\ just agreeing w/ you, (Empire) because you, (Empire) lost /\ somewheres in between, "pleasure to drive" & "shouldn't have to beat"