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Home > Technical Chat > Water Injection.....

jbelanger

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Montreal, Canada

If you don't have enough advance, the fuel is going to burn in the exhaust and that's what you'll see. I'm not saying this is your problem but something to think about.

Jean

http://www.jbperf.com/


Jimster
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455bhp per ton
12 sec 1/4 mile road legal mini

Sunny Bridgend, South Wales




On 26th Apr, 2010 gr4h4m said:
StevieTurbo I run the evil suck through setup so temps can get high.

Check this out.
http://www.youtube.com/watch?v=HqBju8QEgKg


I know the feeling, I had traction problems on the rollers so had to stand on the engine. Only then did I realise how ho my manifold got

http://www.youtube.com/watch?v=tICt739NW7U

Team Racing

On 15th May, 2009 TurboDave said:

I think the welsh one has it right!


1st to provide running proof
of turbo twinkie in a car and first to
run a 1/4 in one!!

Is your data backed up?? one extra month free for all Turbo minis members, PM me for detials


gr4h4m

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Chester

That was with wheel spin. It was at a club RR day and the car made very very good power and the operator wanted to run again I said no thanks after seeing it...

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


gr4h4m

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Chester




On 26th Apr, 2010 jbelanger said:
If you don't have enough advance, the fuel is going to burn in the exhaust and that's what you'll see. I'm not saying this is your problem but something to think about.

Jean


Jean, so could it be too rich too? advance is a killer at full boost so it might be a bit of a trade off?

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


stevieturbo

3594 Posts
Member #: 655
Post Whore

Northern Ireland

Use better rollers and wheelspin wont be an issue.

And when cars are on the rollers...I'd be very surprised if manifolds didnt glow !! Its not like thay have massive airflow passing by them, unless the fan system is fantastic.

Which not that many Ive seen are.

If you've no intercooler at all, then WI obviously would have benefits even on lower boost innefficient setups.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


dan187

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Wootton Bassett

On 15th Apr, 2010 MrOz said:
Hey folks,

I've been looking for a topic to possibly cover for my Honours year Engineering Project, and was considering water injection control system.





I'm looking at doing a similar thing for my 4th year project. Mine would be research for a company. Here's the blurb:

"Future gasoline engines need to emit significantly less CO2 than current engines. Downsizing engines is one of the most attractive methods of achieving this objective, with a boost system (typically turbocharger) to achieve adequate performance at high load demand. Unfortunately high boost leads to pre-ignition problems, due to the high effective compression ratio. In this project, the use of water injection to suppress pre-ignition during high boost conditions will be examined. This will cool the inlet air, and increase the density, both of which will improve performance, while the pollutant emission, especially NOx, will be reduced. Engine experiments and computational modelling will be used to determine and predict the performance enhancement that is realisable."

If I do the project I'll keep you all updated


Dan

Edited by dan187 on 27th Apr, 2010.

1275 N/A Sprite, 998 T2 Turbo Mayfair
1275 EFi Turbo


gr4h4m

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Chester

Well looking at the spec and asking on the website Devils own do a small nozzle, so I might price the kit up. The said there is a UK dealer but I'm waiting to find out who so I can get a UK price.

You can turn the pressure down if you use their controller so the nozzle size does have some fine tuning.

On SC setups you apparently see a small increase in boost as it has the effect of "closing" the gap between the SC blades, so they say. As for setup it seems a bit suck it and see the nozzle sizing is just a best guess.. So I guess you trial different flow amounts, boost thresholds, etc

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


stevieturbo

3594 Posts
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Northern Ireland

Ive already said Aquamist are the people to talk to about small jets.

And it doesnt really have any fine tuning. You must use high pressure in order not to dump dribbles.

You need a fine spray, so need high pressure and proper jet sizing.

And if you read any of the links I posted, it isnt a guess. Sizing can be based on airflow and fuel flow, or guesstimated based on expected power.

Similar sort of thing really.

Check Riceracings posts, he goes into a lot of detail.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


gr4h4m

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Chester

The sizing words were from Devils Own website and emails I have received, using their online calculator.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


jbelanger

1267 Posts
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Montreal, Canada

On 28th Apr, 2010 gr4h4m said:
The sizing words were from Devils Own website and emails I have received, using their online calculator.

That should tell you something about them... I wouldn't use a product from someone telling me that you need to guess which one to use. As mentioned, there are some rules about how much water you should use and it should be really easy to find which nozzle will give you that.

I can understand the need to experiment somewhat since all setups are different but you should have an idea of where to start and you should know exactly what each product will give you.

Jean

http://www.jbperf.com/


gr4h4m

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Chester

I should have been more clear their calcultor is not as advanced as the one in the link as it only asks you some simple questions. They say its a best guestimate. I presume like most things you will need to go up and down on nozzle to see the effect on performance.

The progressive controllers control the voltage to the pump so you see a small variable psi to the nozzle.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


evolotion

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Glasgow, Scotland




On 28th Apr, 2010 gr4h4m said:

The progressive controllers control the voltage to the pump so you see a small variable psi to the nozzle.


dont meen to be pedantic but if voltage is controlled the pump wont operate at full pressure at low flows so water wont be atomised aswell. my AEM progressive controller uses PWM :) just to clear that up for anyone wishing to DIY a system :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.


stevieturbo

3594 Posts
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Northern Ireland

All the controllers work the same way. None are way better than the other IMO.

Although Aquamist is the only place that readily offers mappable systems.

Although that will add more complication.


Ideally you want to use the least amount of water that gets your job done. As always, a dyno the best place to resolve that.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


gr4h4m

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Chester

check this out for an install. I dont know anything and that cant be a good idea can it?

http://www.youtube.com/watch?v=8sVNij1iekw&feature=related

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


matty

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Aylesbury

Urm I wouldn't trust that jollop on the tap to catch all of the swarf!

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www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi


stevieturbo

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Northern Ireland

What isnt a good idea ?


On 30th Apr, 2010 gr4h4m said:
check this out for an install. I dont know anything and that cant be a good idea can it?

http://www.youtube.com/watch?v=8sVNij1iekw&feature=related

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


apbellamy

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16540 Posts
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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

Gr4h4m

Have you got a link to the jet/nozzle size calculator that you mentioned. I'm struggling to find it...

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


Brett

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Doncaster, South Yorkshire

http://www.rbracing-rsr.com/waterinjection.html#calc

Yes i moved to the darkside *happy*

Instagram @jdm_brett


apbellamy

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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

Thanks Brett. Lots to read up on there *smiley*

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


jamie@thefatgarage

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Sheffield

Yes, and even the best in the business say any calculation is very much a guide, not a rule. Start small and work up if/as required. I will be using 120-150cc/min to start.

On 15th Sep, 2011 apbellamy said:
Thanks Brett. Lots to read up on there *smiley*


Brett

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there are links to some very good threads on other forums as posted by stevieturbo floating about on tm

Yes i moved to the darkside *happy*

Instagram @jdm_brett


apbellamy

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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

I've been reading the links that Stevie put up, but couldn't find a calculator.

Going by that 70-80 should do me, but I'll get a few for when I eventually get that far.

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


gr4h4m

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Chester

I got a .35 and a .70 from here (I have a .35 which I tried first..

http://www.ebay.co.uk/itm/Water-Injection-...=item359c65907e

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!


apbellamy

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16540 Posts
Member #: 4241
King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

Thanks Gr4h4m. I'm thinking the .70 will be good for me.

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


Rick.SPI

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Thrapston, Kettering, Northants NN14

Could you use your megajolt to controll the water injection? Food for thought.

On 17th Feb, 2011 apbellamy said:
I popped my first one out the other day...

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