Komo-Tec EV4-435 reflash for the Evora 400 - Page 5 - LotusTalk - The Lotus Cars Community
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post #81 of 95 (permalink) Old 06-11-2019, 08:17 PM
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steep price... maybe a group buy? My AMG tune price dropped from $1400 to $700 or so during sales/group buys.
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post #82 of 95 (permalink) Old 06-12-2019, 10:29 AM
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I have just ordered the same tune- a little worried about the octane
rating komotec listed (98 octane in europe).What fuel do you use?
Premium 91 US is around 95-96 octane in europe. Most fuel in Europe is 95 octane.. 98 is sometimes hard to find
Thanks
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post #83 of 95 (permalink) Old 06-12-2019, 11:55 AM Thread Starter
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They will send you both 91 and 93 Oct tunes so you'll be ok.
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post #84 of 95 (permalink) Old 06-12-2019, 01:52 PM
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Thanks. Komo-Tec says it's important to measure Lambda and look like only way to do that or Air/Flow on car is to go on dyno, my other cars have always just been able to read it through obdi. Is there a reason you didnt get that recorded when you were on dyno? Also was Evora an easy car to strap down?
If Iím reading it correctly, it looks like your AFRs are fairly rich?

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Their probe was malfunctioning so we didnt use it - I'm supposed to call him back about scheduling another set of pulls so we can measure AFRs and will try to do that soon.
Please report those when you have them!

Lew
'17 Evora 400 MT
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post #85 of 95 (permalink) Old 06-12-2019, 02:44 PM
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Just got a bill from Fedx for $49 for duty on the cable, did you get that?

Current:
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post #86 of 95 (permalink) Old 06-12-2019, 05:27 PM Thread Starter
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Mine was less but yes, I got one.
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post #87 of 95 (permalink) Old 06-12-2019, 06:07 PM
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Originally Posted by Runeb View Post
I have just ordered the same tune- a little worried about the octane
rating komotec listed (98 octane in europe).What fuel do you use?
Premium 91 US is around 95-96 octane in europe. Most fuel in Europe is 95 octane.. 98 is sometimes hard to find
Thanks
Common story the scales of euro and US octane are different ( US uses the average of the two testing methods), US plus about 4 its equals euro value, google octane to learn

'17 Evora Sport 410 GP (No. 1 of 9) LMS alloy pan, BOE headers, SSC harness bar
'12 Evora S GP (No. 1 of 14) BOE Prototype Stage 2 - 420+bHp **SOLD**
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post #88 of 95 (permalink) Old 06-18-2019, 12:48 PM Thread Starter
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New dyno runs from today with AFR readings (11.4-12ish). 85 degrees F, 93oct, everything looks good. Will be sending charts to K-T for their feedback.
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Last edited by Champale; 06-18-2019 at 01:05 PM.
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post #89 of 95 (permalink) Old 06-18-2019, 07:05 PM
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Originally Posted by Champale View Post
New dyno runs from today with AFR readings (11.4-12ish). 85 degrees F, 93oct, everything looks good. Will be sending charts to K-T for their feedback.
I forgot the lead in. Was this a retest to include AFR's or where other changes made too.?

'17 Evora Sport 410 GP (No. 1 of 9) LMS alloy pan, BOE headers, SSC harness bar
'12 Evora S GP (No. 1 of 14) BOE Prototype Stage 2 - 420+bHp **SOLD**
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post #90 of 95 (permalink) Old 06-18-2019, 07:11 PM Thread Starter
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Just a re-test to check AFRs. I am not going to lie - I love any excuse to put a car up on a dyno! The sound of these cars is hilariously awesome.
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post #91 of 95 (permalink) Old 06-20-2019, 11:00 PM
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Just a re-test to check AFRs. I am not going to lie - I love any excuse to put a car up on a dyno! The sound of these cars is hilariously awesome.
I literally drive mine with the windows half down at all times for this reason. I don't know if its intentional but this is the first car I have ever been in where the windows half way down does not result in wind in your face or annoying pulsating sound. I had to drive home with the windows up after I had the tint installed, was missing the sound the whole way home.

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post #92 of 95 (permalink) Old 06-22-2019, 04:23 PM
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What’s going on from 6000-7000? Looks like it’s lagging and the AFR climbs back up. Looks like that needs to be retuned.

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post #93 of 95 (permalink) Old 06-22-2019, 07:40 PM
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Originally Posted by shay2nak View Post
What’s going on from 6000-7000? Looks like it’s lagging and the AFR climbs back up. Looks like that needs to be retuned.
You mean AFR's drop, i.e. mixture gets richer; probably a built in safety measure on the canned/generic tunes

'17 Evora Sport 410 GP (No. 1 of 9) LMS alloy pan, BOE headers, SSC harness bar
'12 Evora S GP (No. 1 of 14) BOE Prototype Stage 2 - 420+bHp **SOLD**

Last edited by Julian73; 06-23-2019 at 08:38 AM.
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post #94 of 95 (permalink) Old 06-22-2019, 09:00 PM Thread Starter
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If you look earlier in this thread (post #38) and see the comparison between my OE 400 tune vs the 435 tune dyno graph, you will see roughly the same pattern from about 6200-6800. AFRs look good with the 435 flash so it's most likely a timing thing. I have emailed K-T to see if they want to adjust it but haven't heard back. You honestly don't feel it on the road - it rips to the rev limiter with the 435 flash and doesn't feel like it hits a dip.
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post #95 of 95 (permalink) Old 06-23-2019, 12:20 AM
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. You mean AFR's drop, i.e. mixture gets richer; probably a built in stay measure on the canned/generic tunes
No, he's talking about around 5650 rpms to about 6,150, it leans out a bit, over 12:1 AFR. By 6250 it's under 12:1 and then it gets a little richer further up the rpm range. It's not much of change, and only stands out as it was marked and the AFRs are very consistent elsewhere.

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