I had the opportunity to test out the dual adapter Kpro unit for Henry's aka S2_Phenomenon's 06 S2000 and hope some of you find this info valuable.

Henry had us install an off the shelf turbo kit back in 07 and was unhappy with the quality of the kit and the limitations of emanage tuning so he had us fabricate a one off turbo kit for him. We hoped that by the time we finished the kit, Hondata would have this dual adapter available and our timing couldn't have been better. Power goal was 400-450whp on 91 octane with stock internals which we all know has been achieved many times by others, but there were limitations on the 06+ cars. More on this later.



Henry's Setup:
Stock F22C with Cometic 3mm head gasket
ACT Prolite Flywheel w/ BT Stage 2 Clutch
Custom equal length tubo manifold using Burns Stainless piping and merge collector
Garrett GT35R with .82AR turbine housing
Tial 44mm wastegate
3" charge piping
3 core front mount intercooler 3" end tanks
4" intake piping
750cc injectors
255lph walbro
Black HKS SSQV BOV
3" stainless vband single exhaust
All fabrication was done by Aki Maseba. Tuning was done by none other












We tried to achieve the sleeper look for Henry by using black coatings on many of the components:
All exhaust related turbo piping was thermal coated black
All IC related piping was powerdercoated black
Intercooler was coated with a thermal dispersant coating in grey




Once we recieved the dual adpater, I attached the harness to the stock ecu then to the Kpro which I placed in the back of the driver seat.



All in all the tuning went well. I started with a 650cc turbo tune that Doug MacMillan from Hondata sent to me, changed the injector size to 750cc and added the Motec 3bar MAP sensor. I also installed the RSX wideband and set the lean protection and boost limiter before tuning. We ran the car with a 1bar wastegate spring and logged between 14.3-14.6psi




I tuned this motor at a conservative 11.5:1 AFR and as you can see here at 6700rpms we hit 88% duty on 750cc injectors. So this is the limitation. Without installing a return fuel system we cannot safely make more power. This may be old news but I thought I'd share to those who own 06+ cars and want to go FI. Another alternative would be Doug's suggestion of a boost dependant fuel pump voltage booster like the one he is using in his 800hp RSX. Doug's twinchaged land speed beast currently runs 18 volts to the pump on a returnless fuel system.
Correction: This car does run a return fuel system
Larger injectors will not work. Larger pumps will not work.

Quoted from Doug from the Kraftwerks thread:

400 HP is as much as you can make on an 06+ S2000. The limiting factor is the non return fuel system. If you measure the pressure on the fuel rail you will find around 45 psi under boost. If your supercharger kit is making 10 psi, that means the injector has effectively 45-10=35 psi of fuel pressure across it. Adding a fuel pump at this stage will deliver no more fuel.

To make more power:

- Install return fuel system
- Install fuel pump voltage booster (this will increase the voltage to about 18V)

If after this you find the fuel pressure still dropping install an after-market pump.

My Landspeed RSX ran a Walbro at 18V making 800 HP with no sign of fuel delivery issues.

As recommended by Doug, we'll be testing the current pump voltage and fuel pressures. At 14psi Doug estimates a fuel pressure drop from 25-30psi at the rail. We most likely will need to go the voltage booster route and/or fuel return setup with boost dependant regulator.
I've seen Comptech's 06 Civic Si charger kit comes with a tool that compresses or pinches the spring in the internal fuel regulator to give it more pressure. We may give this a try as well.


Our end result was 442whp 314wtq.



We like the fact that VSA and cruise still works and finally NO CHECK ENGINE LIGHTS! Coolant temp gauge works, and the car starts up great cold or hot. Those who haven't played with Kpro, it also comes with boost control features and boost by gear features as well as knock detection and CEL illumination when knock is detected, great for the custom tuner looking to truly fine tune their engines. Doug is also working on a 4bar plug and play MAP sensor which I've tested for the 06+ as well.

Just want to thank Doug from Hondata for giving our limited production cars a tuning solution. Also thank you Henry for giving us the opportunity to be creative with your car.

 

wow thats great

 

one thing... Cruise control doesnt still work

 

Nice numbers, just wondering 1000 cc injectors aren't possible ?

 

Thanks for the write up Jei! The car is loving this cool Nor Cal Air and the car runs way better than with the old set-up with e-manage.

I want to thank Jei, Aki, Nat, & Mark of Blacktrax for all the hard work spent on the car. The final product was more than I could ever expect.

Can wait to take this car out to the Blacktax sponsored track day!

 

not unless you upgrade to a return fuel system



Henry, can you test the cruise control and give us feedback?

 

so if i am reading this right you did 442whp with the Stock fuel system? And in order to make more than 450whp you'll need to upgrade the fuel system?

 

Yeah I wanna know too for us KW guys that might want 12psi in the future....
doug said on his tune the injectors were at 98% already.... yet the mad scientist ran 12 psi on the highboost reflash???

mad confusing....

 

Can you please empty out your PM box?

 

Sorry. Didn't realize my membership expired. I have renewed it and the PM box has more room now.