RICESP Water Injected RX7

[thefalls]

Car sounds very good,and damn its fast!

[RICE RACING]

Originally Posted by thefalls

Car sounds very good,and damn its fast!

Thanks

It's even faster than in the video at the new settings (boost up, charge temp lower, WI rate up!)... gotta keep some stuff to myself though shared enough older information which others can freely copy.

Totally amazing how much performance you can get out of these things!, despite all my years doing this it still does shock me each time you get into it, especially realizing just how normal all the parts are at the end of the day and that it is a true road going fairly heavy set up.

[RICE RACING]

Latest testing:

Have reduced charge temperature in same conditions by over 15deg C, with parallel performance increase this gives (due to charge density improvement), combined with nice reduction in exhaust gas temperature.

Starting to reach practical limits of traction in 3rd gear though *sub 100mph* !!! (in straight line testing)
I am so impressed with just how fast and powerful the Water Injection is allowing, everything is impressive even for a seasoned veteran like me, but the durability is the best bit, well maybe a close second to the warp speed and tire shredding ability

Such small refinements, stuff that most would maybe overlook and continual testing giving big elevations in performance along with better operation of the engine, not trying to overstate it but not something I'd underplay either............ really the more time you put into the calibration the better the results you will see, just when you think that is enough, you find another level of performance, it is unreal what you can do with WI

[RICE RACING]

My New dash board



Nah seriously, it's just a random picture I got of a Lotus 98T (proper F1 car) 1986 unlimited boost era, you can see the EGT label printed up on dash under the digital display showing max of 1120 deg C and air inlet temp of 60 deg C and water temp 90 deg C....

During qualifying they took off the waste gates and replaced them with covers, Water Injected! and Water Spray on intercoolers

58psi+ boost and more watch it here > http://www.youtube.com/watch?v=9dWLh...eature=related what 1300+bhp worth of water injection and maximum qualify boost looks like!

[RICE RACING]

I will attend a local car show with dyno competition being held next weekend, will be interesting to see what it shows on this particular rolling road v's my measures. Have not changed too many things since the final performance tests, though it is very quick and the on board power measure and times are the highest and fastest I've ever recorded at this basic boost setting. I'll run it as is and resist tweaking anything else so I can get a good comparison.

[RICE RACING]

More development and fine tuning. Same boost getting ready for next step, proved reliability at this 1.5kg/cm setting or 140kpa gauge boost.

90-140kmh test standard.
2.51 seconds!

Would achieve 2.4x second range as last 130kmh to 140kmh zone was a little too much in the fuel setting for this qty of water injection. This is quick for a true rotary road car set up.

After the coming show will do long term testing on the 1.7kg/cm or 170kpa boost level and post up the comparison results free time pending

[RICE RACING]

Show update:

The dyno was drowned by water (ironic) hahaha, there was flash flooding in Melbourne and Mikes dyno was under a foot of water!.... insurance job and thus non attendance to show.

Anyway went there and displayed the car, got a large & constant crowd of people who have seen it on the roads and some who were passed at warp speed! and were fascinated to see it was water injected. Was fielding inquiries and answering question non stop for about 3 hours! The 500+bhp has spoken for itself in the last year, leaving quite an impression judging by how many people were coming to see what was under the bonnet.

Drove down to the ocean for some lunch and left a couple of Porsche 997GT2 owners totally humiliated in the wake of the mighty turbo rotary after a little challenge *they started it, I FINISHED IT!* on the highway The overall power is just amazing from 4000rpm to 8500rpm in any gear!. I'm yet to be beaten by anything out on the highway, most just hide after a little "test", not saying its the worlds quickest thing, but fuck me it hauls!, and no excuses either, just jump in drive it & power when and where its needed, no excuses, no poofter mad max ethanol drums required, unlike some!!!!

[RICE RACING]

Originally Posted by RICE RACING

Thanks Richard :smile:

I really have my heart set on it sitting on a steady 1.2 bar or 17.5psi inlet manifold pressure and when the weather cools down here maybe try 1.4bar ~20psi, I will update the VBOX3i testing figures once I get my hands on the methanol and mix up a batch. All levels I have run before in my old cars and in customers ones........ just being too cautious in this one for some reason.

Tested the compression of the engine after 1800km and its good for a rotary at around ~122psi @ 250rpm (front and rear rotor same) cranking speed. Will keep an eye over this long term.



I changed the porting specification to give the engine much more mid range power and not concentrate on top end power so much, it is quite fast on road despite relative low levels of peak power. I am projecting it will have a honest 480bhp to 500bhp (at the higher 1.4 boost setting) but will see what happens when I get around to testing this.

So a full year on and covered another 6000km (to date: all up 8200km) of testing/racing/top speed trials.
Summary: Every drive has been quite high load 90-140 testing probably around 400 or so of these tests, many 100-200kmh & 60-130mph runs (3rd to top of 4th gear) and a few top speed runs (on special test track ). Last 3000km at ~500bhp level @ 1.53kg/cm Boost level.

I did one intermediate compression test between the 1800km and this one today, but only wrote those figures down rather than taking a photo/proof. They were close to the ones today.

Rear Rotor


Front Rotor


This test was fully dry (engine run till out of fuel) and EGI disconnected, First one cant remember but I think was not as "empty" of excess fluid, this makes a high difference to rotary engine compression readings FYI.

Anyway she is not too bad, I did not think it would hold up this good especially given its a mobile test bed each and every single time it gets driven.

I have it at its new boost level of 1.7bar (around 1.75kg/cm) and it is a rocket see if she can make another year of punishment

[Richard L]

Peter, instead of flicking back on all the pages, what is your best 1/4 mile time on street tyre, despite you are not a full time drag racer.

All the other rolling logs are amazing.

[RICE RACING]

Originally Posted by Richard L

Peter, instead of flicking back on all the pages, what is your best 1/4 mile time on street tyre, despite you are not a full time drag racer.

All the other rolling logs are amazing.

Hi Richard,

I am yet to do a "formal" test on that, last "legal" opportunity was a wet run way and I can't get to borrow it that often on that occasion I focused on the 60-130mph measures and some durability testing.

I'll have to get back out there and do an old school 1/4 mile test and terminal velocity test at the end of that distance, probably wait for some favorable weather (cool dense air) to get some nice Hollywood numbers I want to go back and record a 6 second range 100kmh to 200kmh time on the new high boost setting I read back through all the posts and see a common theme of ever changing "I'll be happy with XYZ" and each time it just gets higher and higher.

Been a great project, and learned so much about WI and integration with other elements in the engine to make it all work. Allot of the data collection I am going to use in a course for my students next year....... as you know nothing better than testing all of it yourself and even better when you can prove it to work as we have