13 replies to this topic

[Project_1275_GT]

Hi 

 

Sorry if this has been covered - 

 

I keep searching and trying different search options but I don't seem to be able to find any info on people running water injection. Is anyone running water injection or know of anyone that has tried it? 

 

Thanks

 

 

[Turbo Phil]

Plenty of folk have used/tried it. What exactly do you want to know?

Phil.

[Project_1275_GT]

Cant seem to find much info regarding minis with it installed. How well does it work? Have people placed the injection before or after the turbo?

 

Rob.

[Maccmike8]

Think youd want it pre combustion chamber sp after the turbo.

[NZMini1275]

I run the Aem kit on my supercharged mini
Injecting after charger
It’s a progressive controller so the more boost the more water
Add a solenoid into the line close to the injector and then there is no issue with siphon and can mount tank any height

Edited by NZMini1275, 03 December 2020 - 02:20 AM.

[Project_1275_GT]

I run the Aem kit on my supercharged mini
Injecting after charger
It’s a progressive controller so the more boost the more water
Add a solenoid into the line close to the injector and then there is no issue with siphon and can mount tank any height

 

Just had a read through your build. Looks really nice.

 

How well does the water cooling perform?

Do you have any statistics on charge temps before and after fitting the kit?

Biggest question - how many litres of water do you have and how long does it last compared to fuel? 

 

Rob

[mini13]

it can work really well, generally a 50:50 water methanol mix works well for high boost applications, say kicking in at 15-20psi on a 20-25psi boosted motor. in that case you wont use a lot of water/meth

[Project_1275_GT]

it can work really well, generally a 50:50 water methanol mix works well for high boost applications, say kicking in at 15-20psi on a 20-25psi boosted motor. in that case you wont use a lot of water/meth

 

I have read about the meth mix. From all i have read it sound to be a good well proven system for many cars. But i just cant find much info relating to minis using it. I am planning to try this on the 998 turbo im building. Will run with higher CR and lower boost as it will have a T3 fitted. Planning to install some sensors to monitor air temperature before turbo and again at inlet manifold. Seems like its got to be worth a look at. If i can reduce charge temp using it i can increase boost.. Maybe : ) 

Edited by Project_1275_GT, 03 December 2020 - 02:45 PM.

[Icey]

I am planning to try this on the 998 turbo im building....it will have a T3 fitted.

I'm in the final stages of my 998 Turbo build (fitting the engine) - I'd recommend using a different turbo first. The T3 is too big and too old to work efficiently on these little engines. T2 would be a better fit but aren't exactly modern either. I went with a GT15 partly because they are cheap but also because it'll spool quickly and is a much smaller package. I did try an RHF3 first but it would have fouled the bulkhead, if you're willing to mess about cutting things then they are also small, cheap and quite modern.
 

As for the water cooling - I'd check you have a problem first. Build the motor, get it running, get it tuned and see if you have high intake temperatures. If you can't solve that with inter/chargecooling then look at water injection.

[Project_1275_GT]

 

I am planning to try this on the 998 turbo im building....it will have a T3 fitted.

I'm in the final stages of my 998 Turbo build (fitting the engine) - I'd recommend using a different turbo first. The T3 is too big and too old to work efficiently on these little engines. T2 would be a better fit but aren't exactly modern either. I went with a GT15 partly because they are cheap but also because it'll spool quickly and is a much smaller package. I did try an RHF3 first but it would have fouled the bulkhead, if you're willing to mess about cutting things then they are also small, cheap and quite modern.
 

As for the water cooling - I'd check you have a problem first. Build the motor, get it running, get it tuned and see if you have high intake temperatures. If you can't solve that with inter/chargecooling then look at water injection.

 

 

Thanks for the tips, but this build is really only a collection of spares that I already have for the 1310 Turbo I have just built. I intend to test a few things with the engine but really its just motivating me to refurb all my spares and bolt them all together. I know it will not be a huge performing engine, also the T3 is too large. As I plan to run a higher CR i suspect the pinking will start pretty quickly, if i can cool it maybe just squeeze a little more boost. 

 

Rob

[Turbo Phil]

Water injection can be highly effective it’s ability to suppress detonation and absorb heat are excellent.
How effective it is on your particular install will depend on a few factors. If your charge temps are particularly high it can be extremely useful. If your charge temps are moderate because of low boost or you have an efficient intercooler fitted you will most likely see little or no gain in power if you simply use water. But adding some methanol into the mix, usually 50/50, can increase power.
To get the most from it you really need to tune the engine to take advantage of it, but you have to be confident in the reliability of the kit as any failure can/will result in engine damage.
On the other hand you could just simply add some water to an engine just as an extra safety margin, but not relying on it solely.

Phil.

[Project_1275_GT]

Water injection can be highly effective it’s ability to suppress detonation and absorb heat are excellent.
How effective it is on your particular install will depend on a few factors. If your charge temps are particularly high it can be extremely useful. If your charge temps are moderate because of low boost or you have an efficient intercooler fitted you will most likely see little or no gain in power if you simply use water. But adding some methanol into the mix, usually 50/50, can increase power.
To get the most from it you really need to tune the engine to take advantage of it, but you have to be confident in the reliability of the kit as any failure can/will result in engine damage.
On the other hand you could just simply add some water to an engine just as an extra safety margin, but not relying on it solely.

Phil.

 

We are thinking the same here i think. I am not looking for more power from this. Only using it to assist with prevention of early detonation. I have read that the Meth mix can improve things even further but planning to start with just water and see what happens. I have written a more detailed plan in my 998 turbo build thread. This explains how i intend to use the system. I could be completely wrong, but im going to have a try and see what happens.

 

What could possibly go wrong 

[NZMini1275]

Hi Rob

I don’t have any figures on the charge temps probably something I should do at some stage

My main reason for fitting was for a bit of safety and because its a suck through setup with no intercooler

I run 12psi @ 8.5 comp ratio and timing is set fairly safe

128 hp and 129 ft-lb at the wheels

On track even when 30 degrees Celsius I can hammer around with no issues

My tank is 3.7 litres and depends on settings and use for how long it lasts

Road use I set to start injecting at 5 psi. The water will last longer than a tank of gas if driving normally

On track I set it to start at 2 psi and have to top up after about 15 laps which is approx 50 km

 

Dan  

 

 

 

I run the Aem kit on my supercharged mini
Injecting after charger
It’s a progressive controller so the more boost the more water
Add a solenoid into the line close to the injector and then there is no issue with siphon and can mount tank any height

 

Just had a read through your build. Looks really nice.

 

How well does the water cooling perform?

Do you have any statistics on charge temps before and after fitting the kit?

Biggest question - how many litres of water do you have and how long does it last compared to fuel? 

 

Rob

 

[Project_1275_GT]

 

Hi Rob

I don’t have any figures on the charge temps probably something I should do at some stage

My main reason for fitting was for a bit of safety and because its a suck through setup with no intercooler

I run 12psi @ 8.5 comp ratio and timing is set fairly safe

128 hp and 129 ft-lb at the wheels

On track even when 30 degrees Celsius I can hammer around with no issues

My tank is 3.7 litres and depends on settings and use for how long it lasts

Road use I set to start injecting at 5 psi. The water will last longer than a tank of gas if driving normally

On track I set it to start at 2 psi and have to top up after about 15 laps which is approx 50 km

 

Dan  

 

 

 

I run the Aem kit on my supercharged mini
Injecting after charger
It’s a progressive controller so the more boost the more water
Add a solenoid into the line close to the injector and then there is no issue with siphon and can mount tank any height

 

Just had a read through your build. Looks really nice.

 

How well does the water cooling perform?

Do you have any statistics on charge temps before and after fitting the kit?

Biggest question - how many litres of water do you have and how long does it last compared to fuel? 

 

Rob

 

 

 

Thanks for the info Dan. sounds like it works really well. I am planning to do very similar but with a Turbo engine not supercharged. Again I am only looking for a little safety and to not use an intercooler. Has this allowed you to have a better timing setup without issues? 

 

Rob