G60 Meth/Water Injection

[Sexual Castles 10]

Haven't posted up for ages as have been enjoying driving the car and doing the exterior and suspension but the time as now come to start work to the engine.

 

I have just fitted the RSR outlet kit and have now got a Coolingmist Vari-cool meth/water injection kit to mount in the boot. I have no issues with mounting it, wiring it or installing the injector (will put it after the charge cooler and before the TB). However, I would like to know what psi I should initially set the injection at and what Meth/water mix I should be using.

 

After searching it seems there are G60's out there with meth/water injection systems fitted but the threads are 6 years old and there are no figures! I know I will have to dyno the car and advance the timing/adjust boost to get the best out of the system and utilize the octane raising effect of the meth, but I am also under the impression if I uses a low mix (1:4 Meth:Water) and use it at high boost it will still make an improvement before any dyno work is carried out.

 

Anyone out there able to shed any light on the matter? My engine is as follows:

 

Standard G-werks recon G-ladder, Charge Cooler, 65mm Pulley, Full custom Powerflow exhaust system (soon to be de-cat and new back box as its spit out all the packing), Custom fuel pressure regulator, Braided Supercharger oil feed, Blocked off boost re-circulation system, Jabbasport induction kit & heat shield and RSR Outlet Kit and it is running an 020 16v close ratio box.

 

Any help would be appreciated!

[Sexual Castles 10]

After further reading and searching I have found a few more answers/opinions from 5-6 years ago on here and other websites.. Will post them up here for anyone else looking for info.

 

The general agreement in Water/Meth Mix is 30:70, 40:60 or 50:50 and is just a case of trial and error/application.

 

PSI point for injection on most websites for supercharger application recommend 50% of peak boost. On a small pulley (68-65mm) standard ported charger the peak boost (at a guess) would be between 15-20PSI so the boost controller should be set to come on at 9-10psi. Reading on here the PSI I found people post up are 9PSI, 10PSI and one at 15PSI so I will be setting mine at 9PSI.

 

There are two real options for a single injector location depending on your route:

Before the Co pot and after the c/c or i/c allows the engine to automatically advance timing and adjust air/fuel ratio based on the new air density from the injection, but reading on other pages it could damage engine and could blast meth/water out of blow off valve (debatable and no examples as to how it would damage anything).

As far as I can see this wouldn't allow for any sort of meth in the automatic adjustment so a lower mix would probably be best without tuning for the raised octane.

 

The second option is just before the TB, this would bypass the Co pot and as such the engine would not make adjustments itself but the cooling effect would be increased. I am guessing this location would definitely need dyno work to utilise the increased air density so I will be going with the before co pot route.

 

I will fit the kit and post up results and pictures to aid anyone in the future thinking about fitting one but the benefits to be had on a well set-up kit are worth the effort

[owen g60 10]

I have been looking into the exact same thing.

 

After a few hours in the pub with a friend who is a race engineer for Aston Martin, he recommends fitting a 4 point injection system into the runners on the inlet manifold for best cooling effect and running water only as the meth will strip the bores of their coating.

 

He also recommended having it triggered by the WOT switch as it will cut off as soon as this is released and doesn't rely on boost pressure.

 

Doing it on boost pressure could result in the mixture being put into the system on deceleration and cause issues

[Sexual Castles 10]

Finally finished the meth injection system, its set to begin at 9psi and be on full injection at 15psi and is currently on tune setting 1 of 10 which means at 15psi the pump is at 32.5% duty cycle.

I am running a 60:40 water to meth mix and this has a noticeable performance increase! It now feels like the engine has an added power-band when the pump kicks in and is just constantly accelerating.. It is pretty ridiculous to drive, but the g60 is in a 900kg mk1 golf and was fairly stupid on the gti gearbox as it was.

 

I am going to gradually increase the tune until I get to the maximum the engine can cope with. Others who have fitted these to G60's have said that at a certain tune level depending on engine mods the car seems to bog down at which point they drop it down to the previous tune level and keep it on that when I up it to the max I will post up what tune is best for others to find if they install the same kit with the same mods.

 

Heres some photos for y'all:

 

 

 

 

---------- Post added at 7:52 PM ---------- Previous post was at 7:49 PM ----------

 

Forgot to mention the reason the hose is yellow is because I got some pneumatic grade hose from work that is used for high spec machinery so it is very durable and has no flex so the boost pressure should remain constant all the way to the controller and the meth/water pipe shouldn't spring a leak!