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Discussion Starter · #1 ·
In the last months, I listenend to a lot of talk about different mods that are needed if you raised boost. I think that there is a lot of BS going around regarding tuning our beloved Evos. Some members I talk to on the phone, were getting very worried.

A good story is the one were some try to scare us by saying that our engines will run too lean and will soon self-destruct. Already at 1.4 bar boost. The Ralliart ecu is suddenly not up to the task, you need a bigger fuel pump, bigger injectors, bla bla bla.

My 6 with the abovementioned ecu, open exhaust and intake runs perfectly at 1.4 bar boost. Last year, I had the car on the 'rollers' to check its power (340 din/hp and 420 nm at 1.4 bar peak) and to check the lambda values. The people performing the test (they do many of the N-Ring endurance race cars) were very impressed.

So have your car tested first, before spending all that dough on parts you dont really need!
 
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Discussion Starter · #5 ·
N.RING
i agree mate,hence i dont post a lot mainly just read now, a lot of people with knowledge just do the same and dont pretend to be experts.:)
 
G

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Discussion Starter · #8 ·
Re:'advise'

ok here are my lambdas (well sensor voltage actually) at WOT (on the road...where the car is driven)
i have targeted an 02 of 0.89 volts and have got very close to it, even slightly richer at my detonation trouble spot around 5000 (1.7 bars held here)

0.89 is what link recommend, conservatively rich i guess, sure i might get a bit more power if i go leaner (might not either) but they don't want people throwing a rod attempting to prove a point and i dont want to either

i rewired the existing pump to do this, prior to that my o2 log readings weren't as high as i wanted and frankly i wasn't happy with the egts either (timing also a factor here but it is difficult to advance it here in nz where the best pump i can get is 96)

i'm running a lttle more boost than 1.4 (well in the midrange anyway)

PLEASE post your lambda logs (include timing and MAP reading) and. say WOT from 2000 to 7500 because i am keen to compare them with mine

RPM MAP WG% OXY INJ TPS KNK ADV
2068 108 100 83 9 36 0 17
2090 108 100 84 10 35 1 18
2124 111 100 84 11 80 2 17 0 floor it
2175 119 100 84 12 100 1 16
2239 123 100 85 14 100 1 15
2297 126 100 85 14 100 3 15
2350 129 100 86 15 100 2 14 1
2393 134 97 86 16 100 3 13
2452 136 97 87 17 100 2 13
2520 140 97 86 18 100 1 13
2579 144 97 86 19 100 2 13 2
2641 150 97 86 21 100 2 12
2722 155 97 86 23 100 1 12
2796 162 97 82 25 100 0 10
2869 171 97 85 28 100 4 9 3
2964 181 97 86 32 100 2 9
3059 193 97 86 37 100 6 6
3165 209 97 87 46 100 4 5
3291 227 97 88 52 100 91 4 4
3395 246 98 89 58 100 25 5
3514 255 94 88 61 100 12 5
RPM MAP WG% OXY INJ TPS KNK ADV
3811 255 84 88 66 100 20 5 5
3936 255 80 88 67 100 150 5
4087 255 75 88 70 100 43 4
4206 255 70 88 72 100 16 4
4369 255 65 88 75 100 39 4 6
4479 255 60 88 90 100 22 4
4600 255 55 91 92 100 39 4
4734 255 50 91 96 100 37 4
4845 255 45 91 98 100 45 4 7
4947 255 40 91 99 100 36 3
5054 255 36 91 99 100 32 3
5166 255 31 90 99 100 56 3
5291 255 26 90 99 100 31 3 8
5374 250 22 90 99 100 44 3
5493 249 20 90 99 100 50 5
5592 248 19 90 99 100 39 5
5677 248 17 90 99 100 69 5
5782 246 16 90 99 100 62 5 9
5855 247 15 89 99 100 57 5
5967 247 14 89 99 100 50 7
6044 245 13 89 99 100 61 7
RPM MAP WG% OXY INJ TPS KNK ADV 10
6246 244 12 88 99 100 66 7
6299 246 12 88 99 100 84 7 10.5
6374 245 11 88 99 100 63 7
6462 246 10 88 99 17 47 26
6658 34 100 49 4 10 56 32
6257 14 100 45 5 10 23 32

the last thing you want to do is run out of fuel, always be generous when it comes to specifying the fuel system for a high performance motor, if you are shooting for 400 hp then get a pump that can flow 600hp. this way if you get a blockage or the electrical voltage to the pump unexpectantly drops due to a bad connection or whatever (power proportional to volts squared so doesn't take much voltage drop to dramatically reduce pump output), etc then it is less likely to end in tears

the only engineers i know that would disagree with this are civils (who design bridges, etc) they always do their calculations and then double it...

andrew
 
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