JWT Dual Pop Charger Tune..
Moderator: Matt
JWT Dual Pop Charger Tune..
Hi everyone Im new to tuning so please bear with me... What do I change to adjust for dual pop intakes? Do I double the values in "MAF translation"? Also do I have to adjust something else for it to idle properly? Will I still have to install the "low-speed drivability hose" or can I get away with just adjusting the ECU? Thanks everyone!
Welcome to My DARKSIDE.....
Best explanation is in Erics post here
http://ecu2.forumwise.com/ecu2-thread1821.html
http://ecu2.forumwise.com/ecu2-thread1821.html
easiest way is to use an Apexi AFC/Neo
it will support input of two AFM's and will have 1 signal output.
You can have the Apexi add or average the signal of the AFM's
2 intakes, 1 afm: K x 2
2 intakes, 2 afm + AFC in ADD mode: K x 1
2 intakes, 2 afm + AFC in AVG mode: K x 2
this only applies to twinturbo setups, with seperate intakes
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zimzoom_14
- Posts: 7
- Joined: Tue Jan 14, 2020 5:41 pm
Re: JWT Dual Pop Charger Tune..
Hi Matt and other gurus..
Pls may i ask what a typical setting based on the factory rom for 91 TT manual would be for dual pop, single maf, 550cc injs and Jwt 550s.
I have doubled k to 560 and set TIM to 400.
Latency is at 500.The jwt chip prior to nistune install required 20% increase fueling from 4k-7k on AFC 3 to run safe lamdas.
Now WB afrs are between 14 no boost and 12.5.
We dont have access to any Dynos in this town unfortunately. Car runs fine...but id just like a confirmation that im in the ball park.
My idle fueling cell is at 150...not great but bounces around 14afr.
Tnx and regards
Pls may i ask what a typical setting based on the factory rom for 91 TT manual would be for dual pop, single maf, 550cc injs and Jwt 550s.
I have doubled k to 560 and set TIM to 400.
Latency is at 500.The jwt chip prior to nistune install required 20% increase fueling from 4k-7k on AFC 3 to run safe lamdas.
Now WB afrs are between 14 no boost and 12.5.
We dont have access to any Dynos in this town unfortunately. Car runs fine...but id just like a confirmation that im in the ball park.
My idle fueling cell is at 150...not great but bounces around 14afr.
Tnx and regards
Re: JWT Dual Pop Charger Tune..
I haven't worked with dual POP so cannot advise with those settings
However you only need to adjust TIM and latency for the injection normally. Injection TIM x 0.67 (370CC/550CC) = 343. Latency I would have around 700uS as a starting point
With standard Z32 MAF K is factory, but with dual POP if that halves the voltage, then double the K would be expected
Those are all starting points.
At cruise adjust TIM until stoich with near 0% trim
On the dyno then you can adjust K so you are running within factory load scale range
However you only need to adjust TIM and latency for the injection normally. Injection TIM x 0.67 (370CC/550CC) = 343. Latency I would have around 700uS as a starting point
With standard Z32 MAF K is factory, but with dual POP if that halves the voltage, then double the K would be expected
Those are all starting points.
At cruise adjust TIM until stoich with near 0% trim
On the dyno then you can adjust K so you are running within factory load scale range