Lasse wankel

Just a little note from Sweden, i have built a 13B REW motor for a customer with these short specs.

Large streetport intake
Pulse port exhaust
Ported lower and upper manifold
9:0 cr rotors
Dowled
SRC Apex seals, corner seals and side seals
Exedy 200 mm twin plate clutch
Greddy 2 Row intercooler
Apexi Power FC with datalogit
Apexi boost controller
Greddy T-78 turbo kit with coated turbine housing
3" exhaust no cat 2 straight thru mufflers
AEM peak and hold injector unit
And some other stuff i forgot

The car has been road mapped of the owner and he has taken some maps from
RX-7 club and logged the engine and then modify the fuel curve. The mapping is pretty rich between 10.0-11.1 AFR. Anyway today we G-Teched the car running 17 psi of boost and best 60 ft was 2.48s 0-62 mph 5.39s, 1/8 mile 8.76s@94.9 mph 1/4 mile 13.18@120.2 mph. Pretty bad times but the engine seems to have some power! I looked at my Speed calc and came up with approximately 450-470 flywheel hp depending on weight (2955 lbs-3090 lbs). Is this a good figure hp wise and how much can i lean the fuel out? Fuel is 99 octane Shell V-Power.

Later this autumn we plan on mapping the car on my RotoTest hub bench and see how really much hp the engine have. The owner also want to try dyno with E85, should be interesting!

/Lasse

Lasse wankel

Dyno test the car today on my RotoTest. Made 278.5 kw or 379 hp on hub at 7200 rpm Boost was fluctuating between 15-16 psi. Max exhaust temp 980 deg celsius (way to much). The Apexi Power FC recorded 80 on knock at 6000 rpm so i took out 2 degrees to 14 L 4 T. The knock sensor was then around 40. Fuel was Statoil 98 unleaded. Just for your information.

/Lasse

CrackHeadMel

iTrader: (2)

where was max egt's? do you have any dyno graphs? graph's of afr's? egt's? etc?

Lasse wankel

Maximum EGT was at 7200 rpm. I use static dyno testing today so no curves unfortanately. Temperatur 25 deg Celsius humidity 23% Hpa 1000.8

/Lasse

Lasse wankel

Finally a full day on the hub dyno! The T-78 13B REW engine made 337kw or 458 rear wheel hp@6978 rpm. Thats ca 514 hp at cranc. Boost was as yesterday 15-16 psi. Spark plugs HKS RE 10.5. The exhaust temp 820-880 celsius. L ignition 15 deg up to 6000 rpm then 17 deg. 44.5 deg Celsius in the engine bay 200 mm from AirInx filter.Humidity 25% Hpa 1000.8. And the reason we didn't dyno over 7000 rpm was becausse the injectors (850-1680 cc) was att 100%! The Sard 280l/h pump shall be replaced and the primary incectors changed to 1260 cc units. Conclusion the E85 with 5-7 more advance made 90 hp more than Statoil 98 RON gasoline. Oh and now there is a power/torque diagram on the Swedish Rotary homepage www.wankelregistret.se under section RX-7 (Generation3 FD) Topic 13b REW bromsad.

/Lasse

RICE RACING

^ Great stuff

high-tech

dyno graph

gusfd3s

The diagram shows 350kw Lasse, 337kw was another pull.
Gustav

SAQ

Hi,i have the T-78 recently installed on my car with the exact same set up like your car.The car made 490 hp at 14psi(1bar)and 50kgr of torque, just two weeks ago.
I also use 280l/h pump but mine is a Denso with 2x550 and 2x1600 sard injectors
still up to 19psi(and 570hp) i dont see more than 75% at the injectors.

K_1_M

Hi! Did you run on E-85 as well? And stock fuel lines? We did a fast calculation and came up with that itīs the fuel pump that is the weakest link in the fuel system. But the fuel lines should be replaced as well.

And a other thing how far do think that the HKS twin power amplifier will last when the boost is turned up to about 19-20 psi? Will it give enough spark? weīre still talking on E85...

Narfle

iTrader: (16)

Your trap speed is high for your ET. Work on your launches.(Your 60ft is pretty mediocre)

I doubt seriously that your car weighs that much. That would exaggerate your hp figures.

400whp is ballpark for your setup and boost which I think your just short of off the top of my head if im right about your vehicle weight(which is pretty great for road tunes). I wouldnt lean the fuel out to anything past 11.0 unless I were a pro(like steve kan pro). Your 99 octane is the same as our 93 octane IIRC, its just rated differently.

G-tech is great for measuring gains and losses from a baseline but its fancy garbage for generating honest numbers. There are just too many variables between your axle and the meter(grip,incline, altitude, lattitude and longitude, mount integrity, chassis flex, etc.)

Lasse wankel

Did you dyno on E85? I doubt it. Seems you using a good high octane fuel? What kind of streetport do you have? What kind of rolling road? Percantage loss in drivetrain calculated? Anyway good numbers!

/Lasse

SAQ

Did you run on E-85 as well? Yes
And stock fuel lines? No, fuel lines and gas filter was replaced,aeromotive fuel regulator was installed.
HKS twin power amplifier will last i dont have a power amplifier installed yet Actually i opened a threat asking if power amplifier is considered crucial but i didnt get an answer so far.

K_1_M

Okay. Then itīs probably the fuel llines that keeps the pump from flowing any good...

SAQ

Yoy should defenedly try changing the fuel lines and filter before anything else.

SAQ

Sorry i misunderstood no i wasīnt running on e-85 and yes i was using a 99 octane fuel,a large one,sorry i dont know right now iīll let you know about the dyno tipe, no more than 8%.

K_1_M

It isnīt my car we are talking about, but the fuel system on the car that the thread is about will be rebuilt. The Sard pump will be feeding a catchtank, an external pump will supply the engine with "the juice"...

--MAstermind--

interesting... this is all on a streetported engine? im looking to install a greddy T78-33d is what i have is that the same T78 you guys have? well anyways i will be running an NON ported engine actually so i can guess about 17-20psi to run 450whp?

awsome number good luck on your fuel problem!