[J-Mac]

Just installed the S-Car MAF.

Why? Having just completed an engine rebuild I felt it made sense to upgrade the fuel/air system. The existing AFM and stock airbox 'worked' but I could tell it was the weak link given all the new parts. Start up from cold had revs bouncing until some heat was generated, then it settled into a lumpy idle. AFR's were hopping around a lot at idle (I have a wide band O2 sensor installed). There were no air leaks (smoke tested) and fuel pressure was within spec. Drive-ability was ok, but at low revs/car park speeds not smooth. Also my car is far from stock, its a '75 Carrera with an '86 3.2l with 964 cams, SSIs and Dansk Sport 2i2o muffler.

What do you get? A fully refurbished 28 pin DME, six Bosch 4 hole injectors, MAF and air filter, spare DME chip, comprehensive installation instructions.

Installation is pure plug and play. Took about 1 hour 15 minutes to remove old injectors/AFM/DME and install new injectors, MAF and new DME. I have back dated heat and no AC so that helps.

What are the advantages? In no particular order-
1. 6lbs lighter than stock system
2. Improved idle control, no more idle dipping
3. Optimized coil dwell times
4. Improved fuel atomization at low loads
5. Significantly improved cold start
6. Significantly improved altitude fuel control and ignition timing adjustment
7. Improved intake air temp fuel control and ignition timing adjustment
8. Dyno tuned ignition at part throttle and WOT
10. Improved throttle response
11. No moving parts, all electronic
12. Primes fuel pump for 3 seconds when you turn the ignition key

Post install feedback.
First turn of the key (you can hear the fuel pump prime) and the car settled into a steady ~ 1200 RPM idle that gradually and smoothly lowered to ~ 900 RPM idle over a minute or so. Nice. Let the car warm up to check the AFRs. AFRs match Sals recommended #s of 14.5 to 14.7 at steady 2500 RPM. So time to take it for a drive. With the old setup I had to give it some revs to take off without stalling. With the new set up I can put the car in 1st gear, let the clutch out slowly and the car will take off smoothly like a modern car, with zero throttle input. Talk about enhanced idle control and better fuel atomization at low loads! I went for a 40 minute run. Car ran flawlessly, very smooth with noticeably improved throttle response across the rev range. I wont go as far as to say it increases HP but the improved throttle response makes the car feel like it has a few extra ponies. I am very happy with this system and highly recommend it.