vjd3

Hi, folks:

I have a deposit to hold a 1987 930 ... 25k miles, beautiful car; got a couple of questions for the experts:

1) The car is unmodified except for a 1 bar boost spring that was put in 500 miles ago; what are the ramifications and should it be removed?

2) The 4-speed gearbox is balky on the 2-3 upshift; if you don't rush the shift (wait for a full second) it goes right in. The 4-3 downshift is fine. Something that can be lived with, or is it time to rebuild? I noted that the car had the 1 and 2 synchro rings and sleeves replaced in the past. Cost to rebuild?

3) Accelerating moderately in 3rd gear to about 3500 rpm and then nailing the throttle made the car hitch and shudder with no boost; lifting and then flooring it again brought the boost on with strong acceleration. Mixture issue? Just a confused turbo?

Other than those things, this car is in perfect shape. I've had four 911's, so I know when a car is right, but I'm unfamiliar with the 930, so any help is appreciated.

Vic