3.2L Euro pistons ??

[chris blum]

Any advice on using these pistons in a 87 carrera rebuild? They are much cheaper than the 3.4L set and purport to have similar HP and quicker rev.

I would use 93octane on the street and mix with race gas for DE.

Any issues related to pinging, wear, or anything else?

- Chris

[Bill Verburg]

The high compression(10.3:1) pistons used on the ROW 3.2 Carreras along with the proper DME chip was the major source of increased power & torque for those cars.

• 930/20 ROW 3.2 231 hp@5900 & 209 lbft@4800 10.3:1
• 930/21 US 3.2 207 hp@5900 & 192 lbft@4800 9.5:1
• 930/26 US 3.2 217 hp@5900 & 195 lbft@4800 9.5:1

The later 3.2 US were the same in all respects as the earlier 3.2 US, the hp inc was said to be from a change in measurement methodology(marketing?). The 98 mm 9.3:1 Motronic pistons with 23mm wrist pins for a 3.2/3.4 conversion would enhance the ROW #S and be easier to use with US pump gas. There are also 10.4:1 versions designed for carbs/MFI. These later will have the same problem that the ROW pistons have wrt pump gas. A friend of mine has a 930/20, he reports that it needs a minimum of 93 octane to run without pinging, in the summer(high temps will cause ping) he augments with race gas as often as possible.

[MRC]

Do you need different software to convert to EURO spec? What is the min octane rating for the EURO spec engine?

Mark
3.2

[Bill Verburg]

Do you need different software to convert to EURO spec? What is the min octane rating for the EURO spec engine?

Yes, you will need to remap the DME, a new chip properly configured will do. The factory specified 98 octane euro style which correlates to 93-94 US style. Altitude, ambient temp, engine temp, humidity, etc all affect the octane requirments.