rotarygod

Damn it. When I post really long, people can't read the whole thing. When I try to keep it simple, I can't seem to convey everything in full detail. I just can't win! I need to think up a generic disclaimer for all of my posts explaining how certain details may be changed for examples sake or how some things are just to be assumed to be equal. Oh well.

rotarygod

This thread jumped by 3 pages in as many hours. No girl over here. I wish! I was at a homebrewers meeting on the other side of planet Houston drinking some fine beer.

I've tried to explain the volume/airflow/pressure/efficiency topic over and over again apparently to no avail and I think I'm at the point where I'm done with it.

QuantumTheory08

...Jeff & Jon; great job today. Thank you for your intial posts and responses. I'm hoping to look forward to some video files also.

...way cool,

-jcs-

Silverarrow

as far as the z goes the turbonetics setup is a single and it netted 437 or so hp

PoLaK

iTrader: (1)

Thank you i had said that abs light didn't do diddly back in july but no one listens.

Far as it putting 170whp stock on the dyno and in real-life conditions it's not right. If it was doing 170whp with the volume and speed of real air flowing into the intake in-addition to some other variables there's no way you would have stock "fully loaded 3180+lbs" RX-8's running 14.5 and lower, and i'll say this again its just a number, useful as a comparative tuning tool not tell you what the car is acutally making.

Nemesis8

iTrader: (3)

I updated my old RWHP post today with TC numbers

https://www.rx8club.com/showpost.php...&postcount=317

Nice results guys!

philodox

Thanks Jason, appreciate the information. The E-manage that comes with the GReddy kit doesn't ouch timing at all. It uses stock timing... That's definately something I am going to look into in the next few weeks. Just need this weather to break.. too much damn snow!!


**EDIT** Given that most cars have a 17% loss through the drivetrain (like Jeff Mentioned) I'm getting about 290 at the crank. **EDIT**

murix

Just know that turbos are not created equal. You can not make a blanket statement like this. The Greddy turbo is on the small side for our motor which is good or bad depending on what you are trying to accomplish.

adrian-1

So you got 240.4rwhp with the turbo, a gain of 65.96rwhp coming from 7psi of boost.

Did you do any runs at 5psi (or whatever it is preset to)? I was wondering what the turbo kit hp gain was out of the box, without using the boost controller.

philodox

Apparently the car runs at 7psi until the higher RPM range then tapers off to 5psi. BUt I see 7psi all the way up to redline. Right now the boost controller is just limiting any boost spikes I may see. I have it set to exactly what psi I saw from the kit before the boost controller was a part of the equation. make sense?

RotorManiac

I think Polak is right here...

adrian-1

Got it.
You didn't increase the boost, so the turbo kit should give +65hp increase out-of-the-box.

r0tor

iTrader: (1)

why doesn't anyone ever dyno their car in 5th gear?

Its the 1:1 drive ratio which should have the lowest drivetrain losses in the tranny plus you have much less acceleration so there is less inertial losses.

philodox

because it's very stressfull on the engine and the higher the gear, the more prone to pre-ignition the car is while on a dyno.

JeRKy 8 Owner

Philodox your whp is around the same as a stock 350z. Luckilyyour car weighs almost 200lbs less so Im guessing your 0-60 isnow in the 5.2 - 5.5 second range and probably high 13s in the 1/4 mile. Notbad for a couple grand eh?

philodox

Nope, not bad at all.. I'm quite happy with my investment.

r0tor

iTrader: (1)

how is that? the engine is still producing the same power, its only the rear wheels which are turning slower. The only downside is the dyno takes a bit longer to run (but also gives you better resolution, more power showing up, and more repeatable results) which shouldn't matter as long as your cooling system is up to power.

Landon_Starr

Probably a lot more work than most would want to worry about, but why don't you just calculate the torque? horsepower=(torque*rpm/5252) or something like that. A few simple mathematical transformations and you could have the torque formula. If you have the underlying data points to the graphs it should be easy enough.

--Landon

philodox

whoa.. hold your horses there Poncho :p I'm just stating what I was told the last time I went to the dyno. You must take into account that even the largest fan blowing air on the car is only equates to the same thing as going down the road at about 30mph, if that much at all.... so you're not getting the same cooling effects.

Landon_Starr

Nevermind that idiot's post a couple back... I guess he doesn't read the entire thread before he makes comments.

Did anyone get his IP address? Ban him for his stupid post when you get a minute, moderators. :o

--Landon

dmp

one aspect I feel is important to address - most ppl here are taking his 'old' peak hp number, and subtracting from his 'current' peak hp number, and proclaiming the difference as the amount of power he gained. Unless we see over-lapping dyno plots, it's hard to make that call.

It could be the case he's gained MORE than the 6xhp ppl are suggesting, at different points along the powerband. As an example, on my last car I gained 7peak HP by switching to a test pipe from a cat. However, the car gained 15-25hp and equal amounts of torque from 3000-5000 rpms. I'm betting the power under the curve may have made HUGE gains. : )

Any ability to find a scanner, Philo?

:D

[edit]Grammar...[/edit]

rotarygod

I agree with that entirely. Average under the curve is what matters, not peak.

philodox

I just looked at the old dyno sheet from my pre-turbo dyno runs. I would take a digi pic of it, but it's hard to tell the difference between the stock plots and the Canzoomer plots when it was installed on my 8. It's confusing me looking at it, so fudging a digi pic of it would be pointless.

However, I am eyeballing the plots and compating stock to turbo. With the turbo, I have approx 40hp more at 3000 RPM, 50hp more at 3500RPM compared to stock... then from 4000 RPM on up it's about 55-65hp more than stock.. So from what I see in the graphs, the extra HP comes really early.. around 3000RPM. That's when the turbo spools up which makes sense.

Richard Paul

iTrader: (5)

WOW, just watched live shots of your part of the world. 7F and falling. Man that'll make your intercooler work. Mighty thick air too. That thing should really run with chains on it. :D
Guess that's all a person can do is sit inside and look at old dyno sheets.
Damn I have to go out and work on a leaking lawn sprinkler valve now. :p

Get any offers for that ticket to Hawaii? Oh that's right the airports closed down. :D

Richard Paul

iTrader: (5)

Oh damn, just heard on the tube, NJ has lowered the max speed in the state to 45 mph due to the blizzard. Don't go breaking any speed limits Jon.