Hi everybody,
I believe Seth has the positive turbo experiences he was looking for. On a related note and to drag up an old subject. I believe I know the reason folks
seem to notice a difference in the way the factory intercooled 240 turbos seem to run better. These 84 1/2 to 85 models seem to have better throttle response and more low end torque. I know my 84 does compared to my 82. Noticeable in the seat of your pants.

Well, I have read the Paul Grimshaw Volvo Performance Book and he mentions that you will get better throttle response if you fit the later Control Pressure Regulator. Also the other difference I have found is the heavier recessed
clutch and flywheel. I believe on a turbo motor for street use a heavy flywheel
may be of benefit because the turbo works off of engine load and if the flywheel is heavier it will make the turbo react sooner. Does this sound about correct? What do you folks with turbos think?

In summary I parted out a factory intercooled car and compared the parts to see what was different. Here is what I've found so far. I'll call the cars early and late to tell the difference.

Cold enrichment:Early,Done by vacuum diaphragm on the bottom of the CPR. Also cold enrichment cutout switch just above the starter.
Later:Done by vacuum pressure switch on the firewall. Also has cold enrichment cutout switch above starter. This goes to terminal 11 I believe and may be a good spot to connect for the terminal 11 performance trick.

Both motors use different CPR. Early has the enrichment thing and later is altitude compensating.

The early flywheel is flat and uses an 8.5 inch clutch. The later is recessed
like on a 740 and uses a heavier 9 inch clutch. I think the sizes are correct.
Metric size I think is 225mm and 240mm respectively.

Would these changes really make the motor run 'seat of the pants' better? If so I'm going to try them on my 82. What do the BBers think? Thanks for your thoughts.

Dave 82 242ti 276k mi....