I have finally decided what I am going to drop a few more $'s at. I am going to try out the aquamist injection 2d system with an apexi afc. I hope to attain 10-20 more hp. I believe I can do 220whp with out a head or supercharger mods.

Correct me if im wrong but I believe I can run 13 to 1 AF with a proper water and alcy or meth mix. Or is that a little too lean?

I would greatly appreciate any one's comments on tunning or install comments.

 

How are you going to get A/F ratios? I'm putting in a wideband. Also, stoiciometric is 14.7:1, so 13 to one should be pretty safe. I think jlm targeted 12.5, but he may have played with timing too.

Matt

 

Yes I have a wide band O2 but I might just use the one at the dyno. I dont have a cat so it's not a big deal.

I'm thinking I can run less fuel and more timing with water injection. This is simply because the water will cool the intake charge and lower cylinder temps, which in turn lessens the chance of detonation. I can use less fuel because the extra fuel is used to cool the cylinders and hince is not needed.

I think I am going to use a water jet on the pre and post intercooler horns.

 

I've read that post-intercooler would not work nearly as well as post-IC with the water injection. I think you can find the thread about water injection around here somewhere. Might cut down on your costs. Just a thought .

edit- the thread: https://www.northamericanmotoring.co...ater+injection

 

Also, talk to M7. They have a prototype alkie-injection using a reservoir where the stock airbox goes.

 

awesome!! I was just thinking that would be a great place for an injection reservoir. Randy/Peter, any word on when this might hit the street?? Assuming you guys are working with an MTH (from the Cosworth package) program to trigger the timing for the injection??

 

Thanks for the reply. I have read the thread on the water injection. My purpose for the jet after the intercooler is to lower cylinder temps. This is for reliability purposes only, and won't make as much horsepower as cooling down the inside of the intercooler.

 

I have heard and seen this posted on here but I have not seen any info on production. Also I'm not so lucky to have a AGS so I have a big air filter where the alcy reservoit goes.

I was thinking of putting a 2.5 gal tank either behind the passenger seat or in the boot. I have no backseat so their are several mounting opportunities back there.

 

Another thought, then...maybe you can work with the rear seat delete guy and get one placed below the false floor?

edit: linkage..https://www.northamericanmotoring.co...ar+seat+delete

 

How do you plan to adjust timing? I think Apexi afc just adjusts fuel.

 

Haha. How long has that guy been working on that project? Seems like forever. Anyways I had a local custom guy do a back seat delete with an amp rack a while back. I have since then removed it and everything else behind the drivers seat. Well... not everything but everything that I do not use or need. Yes it is ugly but it's light!

 

I am wondering the same thing myself. I'm not sure if I should just lean the mixure out with the same timing charts that come with the GIAC or see if I can find a few more ponies with timing.

However I am not sure you would want to run more timing. Wouldn't this raise cylinder temps or atleast raise the chance of detonation even more.

 

any update on this

 

The apexi is in transit to me. The water injection system is up in the air right now. I still haven't decided what system to use. I might even change from water to alcy.

Any input on injection systems would be very helpful.

 

Spillman:

I'm in the process of adding a Aquamist 1s...I'm wondering if you have changed your mind about it or not??

///Gilbert

 

Yes we have been working on a MINI specific system


These are my findings so far:

Water did actually lower the HP when injected post IC, we could have possibly
used a smaller water nozzle, none the less we lost 8hp of the bat....

Alcohol cooled down the intake charge tremendously no apparent loss of HP
if anything we got some additional advance in timing during data logging.
We will have dyno results very soon.

Other worries and concerns:

Alcohol can be quiet flammable and corrosive, so certain precautions has to be taken. The pump (Aquamist) if run dry will break and the replacement cost is around $500.

peter

 

Peter:

What size nozzle were you guys using?

I see you lost HP there, but isn't the whole purpose of adding water post IC is now you are able to up your boost safely? So you should be able to safely lean the tuning more? So wouldn't you be able to get back that power lost and gain some more HP?

///Gilbert

 

Yikes, looks like it would be advisable to cobble up a float system that kills the power to the pump and lights a warning in the dash: http://www.overclockers.com/tips1120/index07.asp