"banjo cat ghost of oppo past" (brgdsm)
09/21/2014 at 13:27 • Filed to: None
0
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"banjo cat ghost of oppo past" (brgdsm)
09/21/2014 at 13:27 • Filed to: None | 0
| 1 |
Three piggyback ECU's working in similar pitch , and the wideband reading unit that replaced it all.
I suppose this is !!!error: Indecipherable SUB-paragraph formatting!!! of a !!!error: Indecipherable SUB-paragraph formatting!!! . This takes me back. Good times when that SAFC doohickey worked right and my drunk friends hadn't mistook it for an audio control thus ruining its tuning forever. They called it the squid after that because it went rich at a specific rpm point and belched black smoke before shooting forward. After that the plugs were replaced and it was seafoamed, btw...
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According to the GSX's documents it was dyno'd somewhere in Maryland with this HKS VPC x GCC+ SAFC nightmare making 214hp @ 12 psi at the wheels. When it was last running with this combo it was road tuned at a violent 20psi. Wish I would have invested in a dyno day then. Not bad on a 2900lb car, probably 2800 pounds with the CF hood... screw lifting that stock hood.
Opening the center console to a green glow behind thick acrylic knobs gave it that bejeweled 90's gizmo character I had always admired whilst coming across similar systems in various tuning mags and media of yesteryear.
The 16 bit central processing unit in the HKS VPC used its own speed density system with air pressure and intake temperature sensors(on the left) and converted it to a signal the stock ecu understood, maintaining its piggyback essence.
Replacement sensors for these had been prized amongst the megasquirt/diy ecu community running speed density systems.
Still it had programmable rom chips for bigger injectors, cams, ect. Basically if you had an 80's-90's Supra, Skyline or Mitsubishi, this combo was the top'0 the line way to run more boost or bigger injectors on a stock ecu.
SO use the following knobs to:
Knob #1: richen or lean the initial throttle response by 2% per notch.
Knob #2: Richen or lean the entire fuel curve by 2% per notch
Knob #3: richen or lean the idle map by 2% per notch
Knob 4: Control the broader curve of an additional FCon, GCC like I had or other HKS computer.
A bogus rom chip you see in the pic is actually what fried the system. Good riddance anyway no one would work with it. After this all fried I had to find an equally free flowing computer alternative because my car never had the stock air sensor to begin with. Thus I chose an almost plug and play unit from ECM Tuning and an accompanying mass airflow translator/wideband controller with uses the GM airflow sensor.
Having an OBD1 car with only one cat converter and low emissions expectations is nice, but collect any useful tuning data I needed to either go to a dyno shop and spend tons of money, find a guru with a mobile wideband unit, or install one myself.
In the pic above and below I am test installing the new ecu just so I could fire the car using those slot connectors and t-fittings I later re-soldiered and heat wrapped. Very happy I correctly pinned out the sensors on the harness using a schematic from the internets. The ecu is mapped for my flowmatched 660cc injectors, 93 octane gas, fuel cut/ redline set to 7800rpm and no speed limiter. : )
Sorry for the grainy pics I used my laptop's camera while working in a cold storage garage in the middle of winter.
When I installed this I couldn't find a slick area to mount it on the dash so I tucked it in the armrest again. I mean look at it, the SAFC was almost a decade older and looked lightyears ahead, probably why they never sold well. Looks aside, it can read the wideband signal from the cost effective Innovative LC-1 unit, which requires you buy a gauge or something because its just the sensor and small controller box. Most wideband systems at the time were like $400+ but I picked this up for abouts $120 new.
With the MAFT-II I can set my desired a/f ratio for a series of RPM points and adjust the car's spark advance when paired with my chipped ecu along with other sensor readouts.
Next I will introduce the bigger turbo currently being installed; the reason for all of these posts now that my go-fast car is no longer a giant paperweight painted British racing green.
Beanomino
> banjo cat ghost of oppo past
09/20/2019 at 07:32 |
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H i i w o u l d w a n t t o d o a c o n v e r s i o n f o r m y t o y o t a c r e s s i d a 1 g f e e n g i n e m y a f m h a s g i v e n u p o n m e b e e n t r y i n t o g e t a r e p l a c e m e n t f o r t h e l a s t 6 m o n t h s w i t h o u t s u c c e s s a n d i d n w a n t t o c o n v e r t i t t o c a r b u r e t t o r. I s i t p o s s i b l e t o g e t a c o m p l e t e s e c o n d h a n d u n i t a t t h a t p r i c e o f $120 a m n o t l o o k i n g f o r t h e l a t e s t b u t s o m e t h i n g t h a t w o r k s j u s t t o g e t t h e c a r g o i n g a g a i n. T h a n x