Can someone please help me out with posting my dyno sheet? I tried useing the attach file but there seems to be a ploblem. I dont think the file is to large.

Made 416 rwhp and really wanted some input. I feel it should have been lower.

chuck

 

Ummm...

You are dissapointed about your 416 RWHP? Personally I'd be estatic, but that's just me.

 

MosesX605
I am happy with the out come of the dyno day. I am just puzzled about the numbers. Did not think 4x680cc injectors whould push that much power. They maxed out at 6400rpm.

chuck

 

That does seem pretty high for 4 680cc injectors. Looks like they should max out around 300hp if my thinking is right 680cc is close to a 34lb/hr? correct?
Seems like you would need something more along the lines of 4 800-825cc injectors running close to 100% duty cycle for those numbers. But I am no expert.

Later
Randy

 

Randy
680cc injectors=64lb/hr injectors. I was thinking the same, around 325rwhp at the most.

chuck

 

Send it to me in an e-mail now, I've got a good free site I can host it on and I'll put it up here. coldy13@dr.com

 

opps my bad..lol
then it might be right. On my 4cyl turbo ford I ws running 4-35# injectors and putting down around 330 at the wheels. And the injectors where at there max, and going lean on me.

What is your setup? Sounds interesting. Nice to see a rotory running an SDS unit. They are popular withthe ford crowd also.

Later
Randy

 

 

Nice!

Give some details of the setup.

Do you have an SAE Corrected dyno sheet?

 

Than you knight1976 for posting the dyno sheet.

This is the set up:
86N/A motor with ported exhaust with Atkins 2 pc 2mm steal seals, turboII LIM ported to match the n/a motor, the upper intake is homemade with a 76mm GM T-body, water/air intercooler, core size is 13x9x3.5, homemade exhaust manifold with a T3 60-1 turbo pushing 19psi with three inch exhaust, SDS controll the four 680cc injectors with a 500hp fuel pump and the stock 83 dist. manage the timing. 25 deg advance after 4000rpm. homemade water injection before the turbo, 93 octane pump gas.
Question.. What is your opinion on the right amout of rwhp with this set up?

 

Based on your setup (especially the T3), I don't think the HP levels are correct. I believe the turbo would be too restrictive. Even as a hybrid, it about a small as a stock TII turbo or smaller. The N/A engine without the sleeves fows about as much as a good street port under boost.

Just make sure the dyno had all the correct parameters set into it first. Otherwise the final numbers could be off significantly.

i.e, Sea Level, temperture, barometic pressure, etc..

I am guessing at most 300 while your intercooler is still cold, and less as it warms up.

If you REALLY want to know what you're putting out - go to the 1/4 mile track and figure out your MPH at the end. Between that and your vehicle weight you'll be able to figure out your real HP with very good results.

I will send Crispeed this thread and see if he has any input.

 

The car is 2695lb with me. two weekends ago car ran a 12.3et at 118.6mph with 2.0 60 foot time. The First few dyno runs were under 300rwhp. ( running really rich, 2x 680cc sub-injectors came on at 4psi ) I will try to go back to the track wednsday night to see if the dyno tuning time has paid off.
Side note on the turbo. bored the hotside on the turbo, the exducer side of the wheel now has lots of clearance.

 

Well, your MPH says close to 350 rwhp.

This method uses the weight of the car and the speed at which the car completed the quarter-mile run.

The formula is: hp = weight * (speed / 234)3

With the ET method, this method uses the weight of the car and the time it took that car to travel 1330 feet (¼ mile).

The formula is: hp = weight / (ET / 5.825)3

This comes out to about 285 rwhp.

Either way - nice numbers.

 

Wait wait wait!!!! Is this a typo or are you REALLY running this much advance. If you are I am tempted to raise the flag on you brotha!!!

 

Even with a dyno sheet people want to cry bs. If its a 60-1 then it should be a T-04 based turbo. Air/water intercooler with an ice tank will get intake temps really low. Add to this a water injection system to help further and I could see that much advance in timing. Rotary Performance claims that the T-II injectors (550cc) when maxed out to 100% (not a good idea) flow enough for 420 hp. If you're running 4-680 cc injectors then why can't it work? They may be stressed but you should be able in theory to hit this number. I'd definitely get more injector regardless. I think that curve looks great. Its really flat. I bet that car drives wonderful.

 

Anything is possible with the right combination!
I've seen T-3/T-4 turbos support 500rwhp. There are many variations of the t-3 turbine section. I've seen t-3 turbine wheels that will out spool and out flow the regular t-4 turbine wheel.
The water/air intercooler helps also. I've seen cars pick up 50 to 80 rwhp over an air/air unit. The custom TB is helping also.
The only part I'm having a hard time believing is the size of the injectors. I remember my first Haltech rx-7 with 4x680cc injestors being maxed at 10 psi at 310 rwhp with a 60-1. The only way those injectors can support the amount of hp that they are claiming would be if the base pressure was very high. But then again anything is possible!
Looking at the dyno without knowing all the facts of the run the torque seem to being peaking at a very high rpm normaly indicating boost creep.
Did someone mention that they were running 25 deg total of the timing with n/a rotors?

BTW. Good luck at the track!

crispeed
87 RX-7 TII
9.204@150.47mph
2600lbs
un-tubbed

 

25 deg advance is correct. I am currently useing the stock dist. and base timing is set (leading) 3 deg after tdc. The vacuum advance is not hooked up, only the mechanical advance is operational. I did check timing at 4000rpm.

Let me say this again, I am also amazed at the numbers. I can beleive everything about my set up will produce these number, the injectors is what I am concerned about.. This is why I ask if you guys think this is correct.

thanks chuck

 

Directfreak- do you know the address of the websight which calculated these results automatically for you. I had it about 6 months ago but unfortunately lost much of my data in a systems chrash.

 

Here's a couple I had on hand.

http://www.torinocobra.com/horsepower.htm

http://www.rx7.com/cgi-local/2ndgencalc.cgi

http://www.csgnetwork.com/automotiveconverters.html

http://www.rceng.com/technical.htm

 

Had a chance to take the car back to the track. 11.9et @ 121.98mph with a 1.94 60 foot time. Ran the car a little richer at the track then on the dyno.
I could not run the car on only 4 680cc injectors at the track so I added 2 460cc sub injectors that came on at 10 psi and adjusted the 4 SDS injectors so I could take the rpm's to 8000. Trying to run just the 4 680cc injectors at the track was to much on the heart and shifting at 6400rpm is way to soon. I think things happen to fast at the track vs on the dyno.

 

Still - Very nice Chuck.

When are we going to see pics of this Bad-Boy?

 

I have a link to some pictures on my profile page. I think and hope it works. Please dont laugh at some of the stuff I have done. Trying to do alot with alittle.
thank for the comp.
chuck

 

Looks great! I like the SDS module in the passanger compartment. That stand is cool!

Any pics of the completed engine compartment?

 

There still seems somthing screwy to me about the dyno sheet... The thing that is kinda bothering me is your torque curve, it seems abnormal for a stock-port engine. According to this chart, your peak torque is near redline, very unusual unless your boost is creeping REAL bad (stock torque peak, N/A is around 4k, TII is around 3.5k).

Other than that I don't see why you couldn't be making those numbers

 

nice power! it is running rich at higher rpms. 11.0 is pretty fat.