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You can just put a plug in it. Never know, maybe you’ll want meth injection there one day.


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Its not a good idea to inject water/meth prior to the turbos or intercoolers. You need to measure charge temps after the I/C(s) and before the throttle plate and reasonably close to where you measure absolute pressure. That gives the best real time data for the ECU to calculate everything (mass airflow/load) as the base from which to apply corrections for temps and O2.

Water/meth injection needs to be in the same place for best results. Ideally, the IAT needs to be after water/methanol so its charge cooling and density effects are measured and included in the ECU's calculations. However not many IAT sensors play well with water/meth and can be eroded/shorted, many switch them around. The challenge there is that the ECU doesn't see the 40-80C drop in IAT that comes after water/meth so the load calculations are off.
 

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Hey mate,
I tend to agree with the pre-turbo meth problems ive seen a number of articles saying it doesnt prove worth it, i think Volvo did a study and found it drastically reduces the life of compressor fan blades.

In relation to the AIT location, advice from tuners suggest that the AIT is before the meth nozzle and tuning will be mainly based from O2 and knock readings. Might be safe to state that if a meth resistant temp sensor was available then most installations would have it after the injection nozzle.
Agreed, and IAT location is definitely made more complicated by water/meth.

I had a couple of conversations on AIT sensor location with AEM and also with some F1 technical guys I know. Their consensus was pretty emphatic - you always want to have have the ECU running baseline maps driven by an accurate load calculation and then trim off O2, EGT etc. You can't have an accurate load calculation if the water/meth is after the IAT. So AEM's strong recommendation, is to have the AIT after water meth. This also gives a robust fail-safe if the water/meth fails/clogs/runs out.

Many tuners still recommend the opposite because, in the past, IAT sensors were eroded by the water/meth spray. I'm told that sensors are now available that are built to withstand this.

Hopefully, I'll get to try this out as mine is in the "wrong position". I'm planning to relocate it when I get the motor rebuilt - whenever that happens with how we are dealing with Covid19 in the US lol.
 

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Or if you want to get fully into the technical aspects of turbocharging, ECU's and water/methanol, you could get copies of Jeff Hartman's "How to tune and modify automotive engine management systems" and "Turbocharging Performance Handbook"
 

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Hey mate,
Yeah just sitting here waiting for final finishing's and interior carpet + remaining interior trims. Then body colour paint the bonnet. Covid really stuffed business up and everyone is still off work or on holidays. Should be finished soon and ready for this years summer. :D

View attachment 299471 View attachment 299472
Stunning and beautiful work. I think a few of us were getting concerned that you were OK after not seeing an update for so long.
 
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