SAE
S300s chipset
Horsepower and torque in the 300s -at the wheels- for most any S3 (85-86 32V) with X-pipe! Average 300 ft/lbs torque from 2500-5500 rpm!
Combined with higher fuel pressure from a S4 fuel pressure regulator (55±3 psi, 87 only fits S3) for better fuel atomization and lower injector duty (max 85%@6K rpm), the S300s chipset is an electronic supercharger! Starting with the final versions of the stock S3 chipset, the S300s chipset has been extensively reprogrammed to make the S3 the torque monster it should have been from the factory. Faster rev'ing. Instant response. Richer in the midrange for awesome torque, safely leaner at high rpm for maximum horsepower, and smoother all over. Extensively tested with stock cats and X-pipe. Passed California emissions!
Final version: 3.6! Optimized for TQrings. Use non-resistor spark plugs w/larger gap for even higher performance, better mpg, and lower emissions. (Optional.) Choice of 92 (98 EU) octane or thrifty 89 (95 EU) with nearly the same performance. 'No-Lift-Shift' lets manuals shift as fast as an auto, w/o letting off the gas. (Optional.) Selectable 'adaptive AFR' for better efficiency, and bumpless idle. User adjustable WOT fueling! (optional) (Update here.)
'Adaptive AFR' is adaptive fueling based on your driving style using the stock O2 sensor. Fast driving will produce a flat AFR of around 13.8 for immediate response. Relaxed, smooth driving will produce an AFR of around 15.4 (after a 30-60 second delay) for economy.
New programming:
- Higher rev limit (AT 6550, 5T 6700)
- User adjustable WOT fueling (option)
- Dual rev limit, 'No-Lift Shift' (option, clutch 4800/6700)
- Expanded WOT map for precise control of WOT fueling
- MAF CO adjustment changes WOT fueling ± (stock only affects part throttle)
- Functional LH 'octane loop', connected = adaptive AFR mode (15.4:1 cruise AFR) (photo)
- Additional ignition advance at idle when coolant approaches 200F/93C to help lower temps
- Load x AirTemp predictive retard map for max power possible w/o a knock sensor, and no WOT 'bog'
- Air and coolant temp maps rescaled for active ignition advance adaptation at running temps (165-195F/74-91C)
At wide open throttle, the stock/AT/eBay fuel chip is too lean in the midrange for max torque, and too rich at high rpms for max horsepower. With low stock fuel pressure (36psi), injector duty is >80% before 5000rpm, and can hit 100% well before redline! The AT/eBay (all eBay are AT copies) fuel chip has a crude fuel dump at ¾ load in the cruise map, but is otherwise stock. Stock EZ and LH WOT maps mean AT/eBay chips cannot dyno higher HP than stock, and the rev limit is stock @ 6400 rpm!
Recomendations:
- Rebuilt MAF
- WOTnot/WOTpot
- Stock 83C thermostat (180F)
- New TPS (throttle position switch)
- Cam timing: 0° (-2|0 cold, PK32V'r)
- Flowchecked new Ford or cleaned stock injectors (24#)
- Accelerator cable taut (adjust at firewall under airbox, 13 and 17 mm wrench)
- Automatic: tighten bowden cable until socket drops straight on ball (stock)
Ignition chip (EZ) options:
- 89 octane USA/AKI=95 EU/RON
- 91 octane USA/AKI=California
- 92 octane USA/AKI=98 EU/RON
Fuel chip (LH) options:
- Manual (rev limit 6700 rpm, injector cutoff on decel)
- Automatic (rev limit 6550 rpm, no inj cutoff on decel)
Spark plug options:
- NGK 2912 BP8ES | gap to 1.0mm/0.040" (colder, non-resistor)
- Bosch 7992 WR5DC | gap to 0.8mm/0.032" (colder, stock WR7DC)
Required:
- TQrings
- MAF screens installed
- Stock Bosch ignition amps (2nd stage)
- 87 S4 FPR, 92811019802/Bosch 0280160262 (photo)
- AFPR set to 58 psi (engine cold/off, FP relay jumpered)
'86.5 manual with all basic mods, 321 rwhp!
SAE
Included:
- TQrings
- Socketed LH chip
- Socketed EZ chip
- No-Lift-Shift wiring (option)
- EZ/LH informational case labels
Rennlist pictoral install thread - PorKen chips install
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Update from previous S300s version
Update V3.5 to V3.6
EZ - small revisions, more air temp retard
LH - minor changes, better cold starting (<40F/4C)
TQrings - S3 intake enhancers
Fills the empty transition from plenum to runner. Increases air velocity and promotes more equal cylinder filling by reducing turbulence. Closer cyl to cyl AFR means less fuel per RPM for more part throttle power, better MPG, and lower emissions.
New S300s programming and map tuning makes for a virtually flat WOT AFR from 1000-6400 rpm, silky smooth idle, easier starting, and awesome performance from cold start to hot. Extremely low rpm running w/o stalling or complaint. Drives smoothly at 1000 rpm (or less). Pulls strongly in top gear at highway speeds.
Easily installed. Remove plenums, slide in rings, replace plenums.
Included:
(8) Rings - machined aluminum
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WOTnot - extra performance w/S300s V3 or stock chipset
Disable WOT input into EZ for enhanced performance.
S300s V3 chipset:
- Use when you are sure your fueling is perfect (WBO2 verified <13:1 AFR from 2500-6000)
- Combine with octane loop for reduced octane loop retard
Stock chipset:
- Use anytime
Installs in EZ connector. Unplug for WOT disable.
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Update from previous version (or for use w/stock chip)
WOTpot - user adjustable WOT fueling w/S300s V3 chipset
Easily dial in the full throttle air fuel ratio on the dyno*, or logging with a wideband O2. (No WBO2? Adjust CW/richer until WOT feels slower, then turn it back a little.)
Individual MAF voltages vary at WOT. Precisely adjust for the safest AFR to make max power (<12.8 average recommended).
Recommended for X-pipe and true dual exhaust (86.5). Required for headers, or custom dual 2.5".
Installs in LH connector.
*Note: typical (dyno) tailpipe AFRs are at least 0.5 point leaner than measured at the X-pipe
PDF manual - WOTpot
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