Starting to tune sr20det

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Fugge
 

Posts: 5
Joined: Wed Jun 11, 2014 5:30 am
Location: Sweden

Starting to tune sr20det

Post by Fugge »

Been trying to get at good base map for my setup before installing bigger turbo this winter.

Current specs are:
Fully forged sr20det
BC 264 cams
detchwerks(spelling?) 810cc injectors
HPX Z32 afm
stock turbo @ ~9psi
3" exhaust
Innovate MTX-L

I adjusted K constant/latency for decent AFR with O2 disabled.

Ive done a couple of runs and looked at the logs. It runs really rich under load without reaching those areas in the map.

What i think i need now is a nudge inte the right direction to get further in the mapping.
Is it my scales that are completely off? i dont know where to go from here.

I never hit WOT in the log because when i do AFR dives towards 9 and lower.

Any help is appretiated.
//Fugge
Attachments
NIStune_2014-10-16_1738_39.csv
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bra grund lite mappad.bin
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Fugge
 

Posts: 5
Joined: Wed Jun 11, 2014 5:30 am
Location: Sweden

Re: Starting to tune sr20det

Post by Fugge »

poking around the map, is my TTPmax completely off the chart perhaps?
Matt
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Location: Adelaide, Australia
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Re: Starting to tune sr20det

Post by Matt »

Turn your O2 sensing back on...

Hold about 2000rpm in closed loop area of the fuel map. Watch your long term/short term trims and adjust K constant until they reach about 0%

Your AFRs should then be showing about 14.7:1 on the wideband. After doing a short run see how far your TP goes and rescale the maps to the maximum TP value

After this change your fueling to achieve your target AFRs (normally around 11.5:1 depending...)
Matt
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Posts: 8961
Joined: Sun Jan 29, 2006 1:45 am
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Re: Starting to tune sr20det

Post by Matt »

TTP max is fine. That is the default setting when changing injectors and ticking that box
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