964 AMD Hot Film Induction Modification
Discussion
What b0ll0cks!!
But then my old '64 is just one example of many.
AmD hot film and chip with revised intake trumpet. Another 30bhp found and the car became a 993/996 teaser on track -and a C4 to boot.
I ran it for four years like this.
The current owner has had it for nearly four years and has had no issues with it over 40,000 plus miles. I believe it's done over 120,000miles total now.
Just my NVHO, of course!! ;-)
But then my old '64 is just one example of many.
AmD hot film and chip with revised intake trumpet. Another 30bhp found and the car became a 993/996 teaser on track -and a C4 to boot.
I ran it for four years like this.
The current owner has had it for nearly four years and has had no issues with it over 40,000 plus miles. I believe it's done over 120,000miles total now.
Just my NVHO, of course!! ;-)
Any idea how much of the power was attributed to the changed air flow sensor and how much to the re-chip?
In the late 80's an American company was selling hot film air flow sensors for the 944 and 944 turbo. Bruce Anderson, 911 guru, described them not as air flow devices but cash flow devices.
In the late 80's an American company was selling hot film air flow sensors for the 944 and 944 turbo. Bruce Anderson, 911 guru, described them not as air flow devices but cash flow devices.
I had one fitted 4 years ago to my 964 C2 which was independantly tested at 298bhp. I had problems with it after another garage had worked on the car which was apparently a damaged connector. Last month the generic Bosche MAF unit failed and was replaced which is a very simple job although the MAF unit was a couple of hundred £s.
It's worth noting that mine was a Geoff Everret conversion whereas the MAFs done by AMD now are Sportec kits.
TBH it's a no brainer; cheap hp, more modern tecnology, better engine response and there's really very little to go wrong ( apart from the connectors, and the MAF units themselves can fail)
It's worth noting that mine was a Geoff Everret conversion whereas the MAFs done by AMD now are Sportec kits.
TBH it's a no brainer; cheap hp, more modern tecnology, better engine response and there's really very little to go wrong ( apart from the connectors, and the MAF units themselves can fail)
From memory, the 993 already has a hot film type MAF in it, rather than the 3.2/964 hot wire system. So there is no advantage gained.
993 engines are notoriously difficult to extract extra power from, compared to the earlier engines. Ninemeister (Colin, 9M) is the best person to advise. He has got 400bhp out of a normally aspirated 993 engine, when people like Roock struggle to get 340bhp at a greater cost.
Best thing you can do really is just filter/exhaust/remap package, which should see your car just past 300bhp for a smallish outlay. It will cost a lot to go higher, relatively. (Compared to the cost-per-bhp gains on the 964 engine).
993 engines are notoriously difficult to extract extra power from, compared to the earlier engines. Ninemeister (Colin, 9M) is the best person to advise. He has got 400bhp out of a normally aspirated 993 engine, when people like Roock struggle to get 340bhp at a greater cost.
Best thing you can do really is just filter/exhaust/remap package, which should see your car just past 300bhp for a smallish outlay. It will cost a lot to go higher, relatively. (Compared to the cost-per-bhp gains on the 964 engine).
It would be unprofessional of me to comment on other tuners products, but in my experience we can achieve the same power output or more from remapping the 964RS with the standard air flow meter as we have seen from the same cars with a mass flow conversion. Only 3 weeks ago I fitted Motec onto a 964RS that the owner was not aware has a mass flow kit. We measured the performance before & after, it cam in with between 283-287 bhp & left with 322bhp on Motec. In comparison another RS in the shop with our remap hit just shy of 300bhp. Hence we do not recommend or sell a mass flow conversion for the 964 model.
However in saying that, Tony.T's early alloy manifold 964 with ported throttle body & Geoff Everett mass flow conversion makes excellent power (figure he quotes was measured on our dyno), so obviously the performance potential is there to be had provided the system is mapped correctly. It would be interesting to see if TTs car would make the same on a stock afm & remap, but since it is running perfectly ok as it is, neither of us want to disturb anything just to prove a point.
For serious power/torque gains Motec is definitely the way to go (for reasons well documented on this here forum), indeed we have a 964RS booked in later this month for motec which currently has a mass flow kit fitted. Apparently the owner is very unhappy with the running & performance of the car since the conversion, but this may be down to the different cams that have been fitted rather than just an issue with the mass flow kit.
However in saying that, Tony.T's early alloy manifold 964 with ported throttle body & Geoff Everett mass flow conversion makes excellent power (figure he quotes was measured on our dyno), so obviously the performance potential is there to be had provided the system is mapped correctly. It would be interesting to see if TTs car would make the same on a stock afm & remap, but since it is running perfectly ok as it is, neither of us want to disturb anything just to prove a point.
For serious power/torque gains Motec is definitely the way to go (for reasons well documented on this here forum), indeed we have a 964RS booked in later this month for motec which currently has a mass flow kit fitted. Apparently the owner is very unhappy with the running & performance of the car since the conversion, but this may be down to the different cams that have been fitted rather than just an issue with the mass flow kit.
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