RICESP Water Injected RX7

[Grant M]

CCome on then Peter you tease, what boost are you running now, so much so that your having to replace the gear box!!!

[RICE RACING]

Originally Posted by Grant M

CCome on then Peter you tease, what boost are you running now, so much so that your having to replace the gear box!!!

In direct drive you can run basically any power you like as you are not using any gears so 4th is not a problem, the others can be as you rightly suggest but you just have to limit the power to suit.

I'm busy working on my new project, so once that is a bit further along all of the info on RICESP will be freely available to all to copy as always

[RICE RACING]

Been super flat out last few months to post back here, sorry boys and fans

Have some time now (quieter near end of year thankfully!) to work on new things in the Mazda world so RICESP will get some more upgrades and development work, allot to do with new settings on the water injection system, when I get closer I'll post up some pics and new information

[RICE RACING]

Some more pics of my ride

*Doing some more WI system developments over the next year, RRWEP140 set up tested/installed and ready to go! *

[RICE RACING]

In preliminary tests of the latest 2012 WI system specification, starting off on lowest boost setting of 1.45bar Intake Air Temperature is around ~35 deg C (~18 deg C ambient test) in 3rd and 4th gear. Exhaust Gas Temperature is around 790 deg C to 800 deg C (around ~70 Deg C drop to previous settings on same boost pressure.

These are noticeable improvements over the last WI settings

Only possible on full CDI ignition system (don't attempt/try this with any inductive crap box system!). Also running a different specification spark plug of higher heat tolerance, to date its working fine in repeated cold start tests and short engine run tests (real world driving) not fouling at all, and burning any ratio you throw at it.

Doing full recalibration to suit the new set up and will test all aspects and post back as time allows

[RICE RACING]

Well well, new settings are showing potential

Low Boost setting 20psi or ~1.4bar (3rd gear RR std runs)
90kmh -140kmh = 2.32 seconds ! and 2.33 seconds ! (2 x separate tests)

EGT peak = 880 deg c to 870 deg C

Other info to down load off the ECU but will post it up later........

Car is stupid fast & effortless with new WI strategy, and will only go faster on higher boost settings.
More info (snap shot) added:
RPM 7700rpm
EGT 878 deg C
AIT 36 deg C to 40 deg C
Ambient temp 18~20 deg C
Boost 142kpa 1.45kg or 20.6psi
TIP 18.6psi
TOP 3.3psi
FP 65.8psi
Turbine rpm 107,166rpm
AFR undisclosed
WI undisclosed
Ign timing and split undisclosed
Inj duty 54%

On board power meter showed 379rwkw, car is very quick for a true road car, too fast really to be used properly without tripling any posted speed limits LOL. Anyway its got a great base to finish off the very high power/high boost work I was doing through this and last year, with much more favorable long term operating parameters on the engine and turbocharger. Next stages are back up to 1.80kg boost, 2.00kg, and 2.20kg and 2.45kg, keeping in mind the above is only on ~1.45kg to 1.5kg *waste gate spring minimum setting*

Non of this is remotely possible without the power of water injection all mind you on a near 3 year old over 20,000km daily driven engine that has NEVER been touched! unlike some who have gone through 100k worth of engines and tunes lol.

[RICE RACING]

Did some more fine tuning overnight (still to the 1.4bar map) and it is just f7cking retarded how fast it is going!@

90kmh-140kmh in 2.09 seconds and 2.18 seconds!@ Unbelievable !!! < (ECU records not VBOX!)

The new WI settings are really sensitive to overall fuel mixture and spark lead, just by trimming out a few RPM points only to the target AFR it just ignites the little red rocket! and it full on fly's !!! It's pulling over 0.610 G in 3rd gear. Almost do not need the high boost settings

Now I have the mapping over RPM 100% sorted at low boost, easy to extrapolate to higher boost settings need to sharpen up the reflexes to match the car now, sh7t happens so fast you have to be on it ......... WI never ceases to amaze me, and I thought I knew it all.

[RICE RACING]

This is my "fuel cooler"

Fuel goes in the bottom fitting, out the top fitting, in my water injection tank is a allow fuel coil, it stabilizes the fuel temperature, after a 30 minute drive the tank is still cold to touch, I have included a log of the fuel temperature on a highlighted 3rd gear 100kmh to 150kmh run in 2.291 seconds! 20 deg C ambient day yesterday at this test run. Fact V's Fiction lol

[RICE RACING]

Doing the boost map learning process today on a little test drive, was very hot, official temperature was 27 deg C but it felt more like 30 deg C where I was testing. Anyway at a peak of 1.56bar (1.72kg/cm) boost in 3rd gear @7800rpm it showed 41 deg C ! & 880 deg C EGT....... this is unreal, the car accelerated just as fast as what it did on a 18 to 20 deg C ambient test.

At one point 20 minutes further on opening up the throttle the IAT registered 19 deg C!!! never ever had this before so the new rate of WI is effective and whats more very combustible with big gains in performance and safety factor.

Once the boost is set at the 1.85kg/cm setting across the rpm range I'll re-test at standard temp and pressure day to see how much better it is in like conditions.

[RICE RACING]

1.85kg/cm or 26.3psi is unbelievable on the new set up

3rd gear in dry is unusable, as boost comes on it just overpowers the Kumho KU36 tires, leaving some nice marks down the highway

4th gear at higher speeds is just unreal, I have power in the mid range rpm's like what I was using before at peak rpm! it accelerates amazingly well in 4th and 5th gear, in 3rd though full throttle cant be used, either turn on traction control or use lower boost settings.

In the new year I will get some more applicable tires to allow the full power to be used and comparisons to be made to other tests posted up. It is a mega metric arse load of fun fun fun