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  #11  
Old 12-08-2013, 01:38 PM
zx9rmania zx9rmania is offline
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Default Re: HFS4 on 996tt

now is ok, was a wrong wire....like 1.x-2V at idle.. As i thought i am injecting too much meth I put just one 0.5 injector and car still boggs when kicking in... it can not be too much meth i supose.... we were running a very low mix like 30meth/70water. AFRs are going like 10.7, i am targeting and reaching 11.8 AFR on pump only. With 2x1.2mm we measured up to 7-800cc/min flow, injectors are 80cc and IDC at 1.5bar is like 70% peaking 75% sometimes

My install was also validated by another user fo yours cipsony who owns a very nice and fast audi ttrs, thank you Ciprian !


A 0.5 injector for this engine could do so much harm ? Besides retuning ??, i dont know what to do, i am lost......
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  #12  
Old 13-08-2013, 01:15 AM
Richard L Richard L is offline
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Default Re: HFS4 on 996tt

I am very confused with your approach. Remember you insisted on using two 1.2mm jets? Now using one 0.5mm, you get bogging. What is going on here?
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  #13  
Old 13-08-2013, 03:40 PM
zx9rmania zx9rmania is offline
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Default Re: HFS4 on 996tt

All I know is that Aquamist seems to work fine now, temporarly i have installed a secondary meth kit to double check WMI and my AFRs and everything with both of them, and in the engine keeping just Aquamist They dont run in parallel, just one enabled at one time. I was reducing the quantitiy of meth injected by reducing the size and number of injectors, that's why i ended with a single 0.5 now. IAT is dropping ok

With both systems, i saw HIGH ENGINE LOADS and 0.73 lambda with every combination of injectors (big, small, dual, single) and every combination of meth mix (30%-100%)

I dont know what is causing this, but if i will find out the answer i will know what to do next.

I target 0.8Afr (11.76) and this is also what i get on pump, on meth i target also 11.76 and i go down to 10.7 and high engine loads (240 instead of 170), any ideas what is the reason for this ?
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  #14  
Old 13-08-2013, 03:41 PM
zx9rmania zx9rmania is offline
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Default Re: HFS4 on 996tt

I meant Aquamist is working fine as i think my problems arent anymore related to the meth system, maybe the tune or something else
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  #15  
Old 13-08-2013, 10:32 PM
Richard L Richard L is offline
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Default Re: HFS4 on 996tt

It appeared you have some misfire fuel to weak spark (carob build up). or over-sized gap. It the fuel are not ignited properly, you get get excessive amount of oxygen, This could be the cause of low lambda value.

Get a new set of spark plugs and start again.
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