For future reference, here are some measured specs off a 1988 3.2 liter US spec engine from the Mondial 3.2: Stock pistons: Dish Vol.- 25.6cc Piston Deck- .020" plus (above block deck) Gasket- 3.312" x .061" (compressed) Bore- 3.268" Stroke- 2.90" My new head data is not as applicable with the larger non-stock pistons, but knowing the numbers above you can figure out what the others should be. Another interesting note: In the difference between the Euro and US specification 3.2 engines, there is a 10 hp difference (270 vs 260) and the only specification change numberwise is the Euro had a compression of 9.7:1 to the US 9.2:1. While there is also a small weight difference, the acceleration times of the Euro cars seemed to time out quite a bit quicker as well seemingly from this difference.
The Euros (except Swiss market) did not have a catastrophic converter, and used different timing maps (acheived by adding or removing a ground wire on the ECU). Another interesting note: In the difference between the Euro and US specification 3.2 engines, there is a 10 hp difference (270 vs 260) and the only specification change numberwise is the Euro had a compression of 9.7:1 to the US 9.2:1. While there is also a small weight difference, the acceleration times of the Euro cars seemed to time out quite a bit quicker as well seemingly from this difference.[/QUOTE]
i believe they are 9.8:1 CR. I live at 7400 feet above sea level - so right now i am just compensating for the altitude loss. Dave Helms degreed my euro spec cams for torque instead of HP, and the car pulls strong from the low RPMs. I have electromotive ignition too. When i drove the car at sea level when i bought it (it then had the borgo pistons), it pulled stronger than any other 308 (QV or carby) that i test drove at that altitude.
Since I have a full Electromtive EFI system, I can do almost anything to the car. I am currently adding an 80mm throttle body from Ford Racing, and want to go up to 10.5 pistons. I just need someone to give me a job number from wiseco or JE so I can order the pistons. Neither company seems to be able to pull up piston profiles and info with anything other than a job/build number.....
I can probably get the number from my pistons, but the CR will be matched to the combustion chamber on my modified head & valves and may not be the same as a stock head when installed, i.e. you will not actually know what CR you are getting.
Wade at FOAtlanta had a really nice of 7.0 pistons for 3.2 turbo newly arived from Wiseco with coated skirts. they are using that as a template to make my 10.5's and should have them in about 6 weeks for about 1400.00
Back to the drawing board---- whey can not do my pistons at wiseco without me sending them an OEM piston and preferably one with a full bondo mold of the chaimber. I may go over to Rutlands next week and see if there are any engines apart over there to play with for a day..
