Marcel Burkett

With everything else o.k. (ie fuel , ignition etc,etc) , can I rely on methanol / water direct injection to safely achieve 20-25psi with a T66 ? I am going to use the ERL kit with the 0.7 (300ml) jet , the pump is to be turned on by the E6K at approximately 8psi and I plan to mix it in either 25 or 50% proportions.

RICE RACING

Yes no problem !

However I suggest the following.

I run 300ml/min on 14.2psi

@ 20psi I changed the flow rate (base) and run 400ml/min instead of the 360ml/min.

Basically aim for a flow of about 12% of your fuel flow (I found to be ideal) for a balance of fluid consumption v's benifit gained.

I have run up to 20psi with 15deg advance on pump gas making around 590BHP...and been VERY reliable

If you do not have CDI ignition, you will need it for complete combustion.

You can e-mail me riceracing@ozemail.com.au if you want a more specific breakdown of my experience of running that type of system...for some different ideas.

good luck, you will be happy with it.

shinjuku

Hey Rice Racing

I would like to hear more about this...

What d you mean by needing it for complete combustion without CDI? Can you pls elaborate?

cheers

RICE RACING

On some cars when adding 10 to 15% water to the fuel flow you will get a small drop of in power while still retaining std boost and timing, I in these cases install a Capacitive Discharge Ignition amplifier to the leading plugs, the resulting HIGHER engery spark tends to regain the loss in power while also allowing you to go for much higher boost without the fear of blowing out the spark or the need to run realy small plug gaps.

CDI is the racing standard, once you start making high power and run cold plugs to avoid detonation you need a strong ignition system, CDI fits the bill.

shinjuku

ok so CDI being many short sparks is better than one long spark?
what CDI do u recommend?

RICE RACING

Yeah, It is multiple on some systems (eg MSD multy spark discharge) and others up to 3000rpm then it resorts to single spark...which is what you need at high rpm we pull so the shorter spark is not such a bad thing as the time available is short to get the job done.

Now when you require a CDI, that is a hot topic I would say whenever you want to run cold plugs and rich mixtures for detonation control...some stock systems can handle running B10EGVs and 11.0:1 a/f mixtures without any problem at highish boost levels...The general consensus is that an ignition amp will give you gains once you are in this teritory.

Now what CDI...good question! My experience is pretty limited as I have only ever used MSD6A on leading plugs only, after doing ALOT of searching on here and looking over the net and talking to various tech guys who distribute the big brands I decided to give the Crane Hi6 a go. The benifit is that on paper they have a realy good spec when combined with the PX92 coil (where I ordered this from the coil was a FREE bonus) In Australia depending on who you ring the average price for a Hi6 is around $500+Aus, In the US it is $350Aus with a free coil ! Oh the coil in Aus is around $180 !!!

So $680+Aus for Hi6 Vs $350Aus for Hi6 with coil......guess where I bought mine

shinjuku

hmm 350 AUS...not bad! what was the name of the place u bought it from?

ok with your water inj setup do u run 50 water 50 metho? the link on ur site for water inj doesn't seem to work...

thanks for your help!

RICE RACING

http://www.jegs.com/cgi-bin/ncommerc...286&prmenbr=76

Yeah, I am a bit slack with the site ! I ran 50/50 for two reasons, I gets damn cold in My part of the country and also my fuel capacity was stretched so I got a bit of extra fuel from the meth. Normally I run more water than meth aroun 80% h20 20%meth as water cools more and reduces detonation more.

RICE RACING

I basically got two for the price of one, compared to the price for one box and one coil in Aus.

If you do a search on here, you will find ALOT of guys run one HI6 on the stock dual output coil.

If you do not have one of these or you want the most performance then you need two coils in parrallel or ONE box per coil for full output from what I understand.

https://www.rx7club.com/forum/showth...&highlight=hi6

shinjuku

Hey RICE RACING you said

would it be possible to add water, then lean the A/F ratio whilst keeping EGT's at an acceptable level....would this perhaps result in no power loss?

i mean water, to a degree, would do a better job of keeping EGT's down than over fueling??? Also wouldn't there be less wear on the engine with less excess fuel washing oil of the contact surfaces?

thanks
Andrew

RICE RACING

Yes, and water is and has been proven to be better than over fueling, it is far more reliable in my experience as well.

On pump gas It is hard to beat.

shinjuku

so on ur setup Rice Racing what A/F ratio do you target with water and what would you aim for w/o water? (at WOT)

cheers

RICE RACING

On optimax I run 11.1:1 A/F (no WI) engine power 540bhp setting.

Same fuel and spec with WI I run 11.7 to 11.8:1 A/F, the differnece being also that I advance my timing to 15deg BTDC (T&L together) where as without WI I run no more than 12deg BTDC.

With the WI on the same power level there is a reliability "long term" Improvement + Fuel consumption BSFC is alot lower due to more ignition advance and lower AF ratio, lower oil temp, lower water temp, which ALL helps the engine under extrteme weather or poor fuel conditions, which is the main reason I like to run it and put it on my customers cars I have done.

The other advantage is as you know you can get to a higher BHP level, In my road car case I can run 590BHP instead of 540 odd BHP just by using the WI.

I have found that with a WI percentage of around 12% to your fuel flow you can increase your timing by 3 deg and lean A/F by up to 10%....NOTE all engines are different! so be carefull, sart small and go from there once you are happy with your setting I recommend putting a "saftey factor" onto it (engineering background here !) as you never know what the next batch of fuel will be like or what adverse conditions you will face. Most of my setting are 2 to 3 percenatge points below what they could ultimatley be, cause I do prefer driving over rebuilding