Spank

iTrader: (1)

Ok guys after long debate on if I should show this I have decided to do so. Here is my dyno chart from last year. As you can see we were working on my mid-range power, so there are no numbers above 6500. I have made very few changes for this year. Larger intercooler, and a water injection system. I will be running on the dyno this year and going up to 7500 and I look to get between 380 to 400 at the wheel. I feel this is do able since you can see the numbers are climbing until we stopped the run at 6500.

This dyno is the Mustang dyno that has the big heavy wheel that the rear wheels must turn. My car is not stock, but what is nice is this is done with the sequential system in tack.

I am doing this to show you what the sequential system is possible of. Not only for power but how many rotaries do you see that have the tq I have as low as I have. I have specifically designed this car to give me as much power down low as I can get. Peak was never an issue, only how much I can get right now.

People never believe me when I try to explain how my power comes on in my car unless they have ridden in the car. Well I have finally shown my dyno chart for all to see. We will see how it does with the additional improvements later this year.

I look forward to hearing your response.

Spank

Kahren

iTrader: (13)

next time try to down from a lower rpm point, so we can see how the low end really is
try 2k rpm next time
with this much power i doubt the twins will last too long, esp if you are planning on having more later.
good curve otherwise from what is shown

GoodfellaFD3S

iTrader: (213)

Comprehensive mod list ?

GoodfellaFD3S

iTrader: (213)

Comprehensive mod list ?

XSTransAm

yeah im interested in your full mod list as well as how much boost you were running?

either way, that is a nice fat powerband!

AMRX7

Those are really amazing low end numbers Allan. I didn't think a stock Primary could make 290 ft-lbs at 3500rpm. Unless your turbos have been modified? I'd suspect people are surprised at how the power comes on in your car because of the gears more than anything else. BTW, you're not still running crazy high boost, are you?

-Andy M.

Spank

iTrader: (1)

Andy with the current set up I am limited to 15 lbs of boost. I am really happy with the car and its power. However you know how it goes with power, it is only enough for so long. I would like to be able to put 380+ with good torque.

Allan

AMRX7

You aleady have good torque. At your cars weight, and with the short gears, you will out accelerate a Z06 (modified) in 2nd gear where you spend most of your time autocrossing. I still don't understand your bottom end torque as it seem pretty hard to believe with even a modified Primary turbo running 15 psi. Is your motor ported?

-Andy

GoodfellaFD3S

iTrader: (213)

Porting would shift his powerband upward and actually hurt his low end torque.

littlemilla3

iTrader: (1)

You probably won't have very much more peak power if you are still on the stock ports.

Spank

iTrader: (1)

Andy, yes it is ported. Cam at Pettit built the motor for racing. I run 15 lbs of boost and thats it due to something about the turbo and having a spring that opens up at 15 lbs. I could run more but I have to call the company and get a different (actuator?) or spring or something to get more. With the full sequential system in tact it works great. It did take a lot of tuning to get it to start early and be as smooth as you see it. It used to be a handfull when the second turbo kicked in. Now as you can see you really don't notice so it is far easier to drive now than before. Plus with the change in the powerband it is easier to stay in second and just scream out of the corners.

Turbos I am running are made specifically for this car. I have never seen better numbers down low than I currently make with the whole combination I make.

I am a firm believer that what I lack in ability I can make up for with car. Now if I could only set up a car as well as you, and if I could drive like you that would be ok to.

How is your turbo? How does it compare to what you had? Where is your chart?

Allan

AMRX7

That's interesting that the wastegate spring was changed on your turbos. Normally that spring opens at like 7psi if it is not being managed by solenoid (stock or aftermarket). It would be interesting to know the mods to your turbos and what the performance is below 3500.

My single makes very similar torque to yours from 4000 up, but is lower at 3500. However, there is no transition bump in torque so it is very smooth. That is at 14.5psi.

I am kind of surprised your power falls off on top like it does, if your motor has been ported. It looks very similar to mine on stock ports. In any case, if this dyno is accurate, you don't need to worry about power. Getting the car to actually use the power available and handle well at the limit is the trick.

-Andy M.

matty

that is damn nice power. cant wait for a run to 7500

matty

why do u say that?
alot of guys have ran higher boost with success.

turbojeff

iTrader: (30)

I don't see the power falling off but the torque is falling slightly. I'd guess that the tiny IC he is running had at least something to do with that.

superior_force

ok, enough drama....what are they, dual T-25s like Jason is selling?

Kahren

iTrader: (13)

because stock twins dont like to make over320 whp for very long, if all you do are some pulls once ina blue moon then thats one thing , but dont call that lasting a while. if you beat the car regularly the twins with that much power wont last too long. some last longer then others. results may vary

matty

mine have been good to me while making 340rwhp for two yrs. I have tracked and ran the car on the 1/4 strip several times. On the track i run 12psi onyl but everywhere else i run 15psi.
Anyways i plan to up the boost to 17psi very soon.

i think i saw your car a few yrs ago at final finish in branford. My car was there as well. You know Wael, right?

Spank

iTrader: (1)

Turbos are not stock, however I was running stock turbos for 3 years with 22 psi peak and 20 psi sustained. Lasted for three years before it spit the exhaust wheel out my exhaust pipe. You should have seen the smoke show.

My mods are intake, intercooler (have a better and bigger one now) so I anticipate I won't be choking at high rpm's like I was on the other. I also have exhaust, computer, fuel, turbos, ignition amp, bigger injectors as well as all the fuel line related mods. I may be forgetting something. Again I am hoping that with the new intercooler being much, much better than the one I had I can get 380 + at the wheel. My goal is the magical 400. I can tell you of my mods the turbos gave me an additional 30 ft lbs of tq all accross the board.

I have done most everything you can to make the car faster with little to NO lag. What you are seeing is a result of 4 yrs of tuning and building for the purpose of making the car the fastest it can be while maintaining the sequential system. Remember my goal was never how much peak power I could get. It was everything I could get right NOW with LITTLE OR NO LAG. And I can tell you that driving this car is completly different than driving my street 3rd gen.

Spank

turbogarrett

iTrader: (1)

Very impressive torque #'s!

rynberg

Why are you so reluctant to tell us what the turbos are?

gen3RxProj

so nobody gets ahold of his secret sauce

pianoprodigy

Interesting. You don't exactly qualify to post in my thread (https://www.rx7club.com/3rd-generation-specific-1993-2002-16/any-dyno-charts-400-rwhp-stock-twins-414803/#post4248528) since your motor is ported and your turbos are "not stock," but your chart is interesting nonetheless.

rynberg

If that's really the case, it's a pretty ****-poor attitude. It's not like he's in some kind of active competition......

So, Spank, why not share what you've done with the rest of the rotary community?

TT_Rex_7

Well if you had a "special" setup, wouldn't you wan't to keep your "independence," and be the only one with it? I know I would! It kind of sets you apart from the rest.

-Alex