I realise this subject query ought to be in the Technical Area but since that cupboard is norally bare I think most Early 911 folk refer to this section. The car is a 2.4T ex-USA, which I have owned for 7+years.
I'm currently overhauling the MFI system to resolve a fueling issue which is causing the engine to under perform throughout the gear ranges. Once at cruising speeds the car drives well; it's just getting there where the problem lies.
Following a performance check at Lambs Garage, Clowne, Debys, which found an additional 15bhp, up from 121(!), it was suggested to have the injectors checked for leakage, operating pressure and spray pattern - since found ok. The throttle bodies too have been removed for cleaning to ensure all air passages are clear. With the engine bay almost bare I decided to get the MFI pump functionally checked and this will be done next week in conjunction with checking for correct injector flow rates - the drive belt sprocket needs relacing anyway due to drive teeth wear. The drive belt has to be the original 1972 one judging from its condition and has to be replaced.
The bottom line question is, has anyone devised a short cut method/tool to facilitate a new drive belt to be fitted without the need for heat exchanger removal etc?
I'm currently overhauling the MFI system to resolve a fueling issue which is causing the engine to under perform throughout the gear ranges. Once at cruising speeds the car drives well; it's just getting there where the problem lies.
Following a performance check at Lambs Garage, Clowne, Debys, which found an additional 15bhp, up from 121(!), it was suggested to have the injectors checked for leakage, operating pressure and spray pattern - since found ok. The throttle bodies too have been removed for cleaning to ensure all air passages are clear. With the engine bay almost bare I decided to get the MFI pump functionally checked and this will be done next week in conjunction with checking for correct injector flow rates - the drive belt sprocket needs relacing anyway due to drive teeth wear. The drive belt has to be the original 1972 one judging from its condition and has to be replaced.
The bottom line question is, has anyone devised a short cut method/tool to facilitate a new drive belt to be fitted without the need for heat exchanger removal etc?