RICESP Water Injected RX7

[RICE RACING]

Originally Posted by RICE RACING

Got a phone call this morning at 7.am from a friend inviting me to go to the local 1/8th mile drag track (owner of it was running in his rail flat head supercharged methanol V8!). Could not resists so I quickly hooked up my new car trailer and loaded the Mazda on and went there.

Got a chance to run my car down there and practice some launching techniques, the thing is unreal 1st gear taking off simply requires a bit of clutch slip to preserve the gearbox and differential, letting the thing fully engage at 3500rpm or so it got such a great spread of power that it just spins the tires all the way through first, second gear grips up and third it was pulling near 8000rpm at the end of the 200m (100mph or so). Took max revs to 8500rpm and the hard work on improving the mixture at the higher revs did help, my passenger commented that it just keeps on making power and theorized it should be able to pull to 9k rpm hahaha (I informed him that was not recommended or needed). He was totally amazed that a road car with full legal catalytic exhaust and moderate noise level on ~17psi boost accelerated so well.

Riding in passenger seat he said in 3rd gear in last half of the track it feels as fast as his 6.7 second drag only 6cy turbo car, it was very hot today (maybe 30 deg C in the sun) on board power meter was showing 281rwkw @ 7700rpm. I took him for 3 runs back to back then did 3 or so on my own and it performed faultlessly. We have a drag event there on the 4th of April and am confident to show up and not make an arse of myself with a car that is too slow *I have VBOX tested his drag car, 36psi boost, methanol, 3300cc straight 6, tripple SU carb draw through turbo set up 1008kg car, making measured ~250rwkw 6.75 seconds @ 106mph in 200m test.*

Will have to implement the launch control system and also use staged boost in the hope of trying to get some better take off's........ though its not really made for that kind of activity at the end of the day it was allot of fun regardless. Will have time to instrument the car before that event and will get the VBOX data of 0-100kmh times and other performance measures also. The traction control was too invasive on initial take off and since I had not configured the launch control yet I turned it off totally on today's tests, the one thing I did learn is the fitment of the new Ohlins suspension full cured the cars tendency to wheel hop on take off wheel spin, it just sits flat and you can modulate the throttle and wheel spin with zero wheel hoping which means reduced drive line stress.

^ Found this old post of mine from my friends Drag Highlighted car we VBOX tested
RICESP is allot faster now then when we had this little test day (from March last year) at the strip where he went in the passenger seat We took him for a drive a month or so ago at a few levels down from where it is now and he said it was much faster than his drag car (seat of pants acceleration) need to post up the VBOX figures across the test increment, picture is worth a 1000 words

[RICE RACING]

So here is a report showing a mates drag car v RICESP
RICESP = 2.57 seconds (just in one gear, great show of power band)
Simon Ward = 2.64 & 2.69 seconds (high power at start of test, then less grunt shows up at higher speed, gear)
Drag car specs:
3.3lt Holden 202 (very old school set up!)
5 speed Lenco clutchless shift gearbox
1007kg car (1077kg as run in this test)
35psi boost (see logging)
Ran 6.75 @ 107mph 1/8th mile goat track in this VBOX file at night (won the event lol) *2 back to back runs*

RICESP: is the 2.48second 90-140 test std (3 gear acceleration test)
1310kg run weight Specs listed many times already!

Here is a pictures of the car. Bloke is a local legend, basically wins against all comers (I'm serious) has been running at that track for 30 years! Oh and his beast is water injected too :hurray:

I helped him jet the carburetors and set the ignition timing on it till it got as fast as it would run Via the VBOX logging, this was done during the event and these final two runs are back to back from the evening finals (night runs interesting with no head lights and poor track lighting lol!@!! (have no mph boards at local Goat track! so VBOX is invaluable! Tim cards work but run faster at track due to roll out ghetto timing lights common to ALL Drag tracks, VBOX shows slower times (depends on how deep you stage!) always as its recording exact start & not guessing like light beam bullshit!) he was amazed with what "modern technology can do" BTW it has no wastegate so the boost is max it will run!!!

[RICE RACING]

This is another interesting comparison: From my collection of VBOX tests http://www.riceracing.com.au/vbox-ii...ing-tuning.htm
90kmh to 135kmh (best power gearing for the stock RX7) see rpm logging.

RICESP V Spirit R Type A (stock standard)

Car specs:
Spirit R Type A
1335kg as run
280PS factory rated engine (100% stock std no mods at all)
Car ran 0-100kmh in 5.55 seconds & 13.85 second @ 104.78mph RR V-BOX Recorded for 1/4 mile *no roll out*
Time = 5.06 seconds & 158 meters

RICESP:
~21psi Rice Racing Engineered Water Injected Monster
1310kg as run
Power is over double a factory RX7 (see actual VBOX RR rwkw measure) so roughly double the power, double the acceleration & half the time required to do it and distance as well
Time = 2.21 seconds & 69 meters

VBOX File report

[Richard L]

Pete,

I am not sure why your images doesn't come through. I don't known how to re-configure the image limit settings. Perhaps if you sign in with another name such as RiceRacing2 etc, you might be able to post more images.

[RICE RACING]

Originally Posted by Richard L

Pete, you are homosexual with your linked images not working

Done!, Internets is gay but we fixed it I hope

[RICE RACING]

Here is the 3 rd gear acceleration of the stock RX7 SP, tested by Motor Magazine with Correvit digital timing.

RX7SP stock 1995 test
204kw
276bhp claimed power factory rated engine (100% stock std no mods at all)

100kmh = 0 sec
110kmh = 0.87 sec
120kmh = 1.83 sec
130kmh = 2.84 sec
140kmh = 4.58 sec

RICESP
You guess the power

100kmh = 0 sec
110kmh = 0.51 sec
120kmh = 0.99 sec
130kmh = 1.51 sec
140kmh = 2.01 sec

[RICE RACING]

I just found 2 original issues of Wheels Magazine from 1996 where they do a Top Speed shootout of Australia's Fastest Cars. They are on their way to me when I get them will scan the full article and put it up.

Features my two fav cars of all time Mazda RX7SP and the Ferrari F40 and a whole heap of other vastly inferior cars They also feature acceleration tests too and I will post up some more comparisons

[Richard L]

Wonderful write up on the aussie racing scenes. Very exciting atomsphere.

[RICE RACING]

Magazines arrived and keeping on that topic I got given an original!!! "Rotary Engine" by Kenichi Yamamoto published by Toyo Kogyo in 1971 a work mate found it in our library and thought it appropriate it went to a good home. < Super rare book, last one I seen on E-Gay went for like $375 or so.

Anyway, been flat out catching up with customer orders and car work, so apart from brief test drives on Sundays (1 hr of week where I can scratch my balls) not much opportunity to do a serious test.

I'll get around to scanning the F40 and stock SP test and also post up some performance data of the new specification which I have been putting through durability trials the last few months... Only problem I have encountered (well not really a problem as such) is the normal operating torque capacity of the twin plate carbon clutch. When the friction material is below a certain temperature it will only hold around 600Nm it needs some use to (higher face temperature) to hold over 700Nm (maximum tq rating).... I will have to start limiting the boost pressure (and power) @ lower engine speeds to hold the immense amount of mid range power/torque the water injection allows the rotary engine to make

[Grant M]

Hi Peter its Grant from MRC, thought i would take your advice and get signed up on here and start feeding off the WI knowledge that is on here.

Are the coils you use for motorbike applications?