why does unichip suck?
01-15-2003, 01:16 PM
#16
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Join Date: Jan 2003
Location: Los Angeles, CA
Posts: 67
Car Info: '02 WRB WRX Wagon
Re: Limitations of Unichips
Originally posted by Vishnu
1) Didn’t know what one was tuning on top of.
--Couldn’t account for spikes or dips in underlying ignition timing or fuel delivery
2) Didn’t have the resolution commensurate of the underlying maps
--Had to make compromise in one map cell in favor of another
3) No control of open/closed loop transitions
--Partial throttle knock correction/de-tuning
--Unexpected long-term fuel corrections
--Hesitations/EGT problems
4) Poor crank angle signal replication
--Induced misfire CEL
--Induced erratic knock correction activity
--Engine roughness/hard starting
5) Not enough software/hardware flexibility for different tuning approaches
6) No control of stock knock control system
7) No influence over stock closed-loop boost control system
--Eliminated all factory boost compensations and safety margin management
8) No user-programmability to account for car-to-car variance
Cheers,
shiv
1) Didn’t know what one was tuning on top of.
--Couldn’t account for spikes or dips in underlying ignition timing or fuel delivery
2) Didn’t have the resolution commensurate of the underlying maps
--Had to make compromise in one map cell in favor of another
3) No control of open/closed loop transitions
--Partial throttle knock correction/de-tuning
--Unexpected long-term fuel corrections
--Hesitations/EGT problems
4) Poor crank angle signal replication
--Induced misfire CEL
--Induced erratic knock correction activity
--Engine roughness/hard starting
5) Not enough software/hardware flexibility for different tuning approaches
6) No control of stock knock control system
7) No influence over stock closed-loop boost control system
--Eliminated all factory boost compensations and safety margin management
8) No user-programmability to account for car-to-car variance
Cheers,
shiv
So what effect does the EMI adapter have on the items you mentioned above?
01-16-2003, 08:57 AM
#17
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Posts: n/a
good question... will the EMI help any/most/all of these issues?
i have a unichip ready to install with a VF-30 when i get injectors. but now it seems that all i am reading about is how the unichip SUCKS! i dont ever remember reading about it being so bad before i got one :-( or is this because the ecutek is sooooo much better? im sure this is the case.
i dont know what to do with this chip, i will be finished with the power mods once put in the VF. at least i have a P&P harness.
i have a unichip ready to install with a VF-30 when i get injectors. but now it seems that all i am reading about is how the unichip SUCKS! i dont ever remember reading about it being so bad before i got one :-( or is this because the ecutek is sooooo much better? im sure this is the case.
i dont know what to do with this chip, i will be finished with the power mods once put in the VF. at least i have a P&P harness.
01-16-2003, 09:47 AM
#18
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Location: Blackhawk, CA
Posts: 439
Car Info: 996 Turbo,Gallardo,BMW 335,125cc shifter kart,etc
EMI Adapter
The EMI Adapter eliminates one (albeit the biggest, IMHO) problem associated with standard Unichip applications. It controls open/closed loop fuel control transitions which greatly improves partial throttle/full boost performance. Gets ride of the majority of hesitations that have bothered people for some time. One reason why there is so much "Unichip sucks" (it doesn't really) talk is because there have been other options. The one I'm most familiar with is the reflash which has yet to show any downsides as far as drivability is concerned. It's also capable of support substantially more power than the Unichip.
Best Regards
shiv
________
MAZDA CX-5 PICTURE
Best Regards
shiv
________
MAZDA CX-5 PICTURE
Last edited by Vishnu; 03-07-2011 at 03:53 AM.
01-17-2003, 05:52 AM
#19
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Join Date: Dec 2002
Location: Sacramento CA
Posts: 10,029
Car Info: 02 Impreza WRX sedan
Re: EMI Adapter
Originally posted by Vishnu
<snip..>
The one I'm most familiar with is the reflash which has yet to show any downsides as far as drivability is concerned. It's also capable of support substantially more power than the Unichip.
<snip..>
The one I'm most familiar with is the reflash which has yet to show any downsides as far as drivability is concerned. It's also capable of support substantially more power than the Unichip.
I see also that Vishnu Performance now offers the XEDE control system that can store more than one tuning map. I take it that it is now possible to revert from say a Stage 0 setting back to the factory map for reasons such as dealer servicing, emissions testing, etc., or to a race gas map for track days. Is the map switching in the XEDE accomplished through a manual switch or software via laptop?
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