I am working on compiling as much info as possible on the vw idi pre cup inserts. Today I bought a brand new 1.9 pre cup, and I pulled a 1.6td precup and a 1.6 na pre cup and measured the volume.1.9td-5.8cc1.6td-5.2cc1.6na-5.5cccc above piston | compression ratio 18 | 23:1 ********************************************************************* 18.5 | 22.4054054054054:1 ******************************************************************* 19 | 21.8421052631579:1 ***************************************************************** 19.5 | 21.3076923076923:1 *************************************************************** 20 | 20.8:1 ************************************************************** 20.5 | 20.3170731707317:1 ************************************************************ 21 | 19.8571428571429:1 *********************************************************** 21.5 | 19.4186046511628:1 ********************************************************** 22 | 19:1 ********************************************************* 22.5 | 18.6:1 ******************************************************* 23 | 18.2173913043478:1 ****************************************************** 23.5 | 17.8510638297872:1 ***************************************************** 24 | 17.5:1 **************************************************** 24.5 | 17.1632653061224:1 *************************************************** 25 | 16.84:1 ************************************************** 25.5 | 16.5294117647059:1 ************************************************* 26 | 16.2307692307692:1 ************************************************ 26.5 | 15.9433962264151:1 *********************************************** 27 | 15.6666666666667:1 *********************************************** 27.5 | 15.4:1 ********************************************** 28 | 15.1428571428571:1 ********************************************* 28.5 | 14.8947368421053:1 ******************************************** 29 | 14.6551724137931:1 ******************************************* 29.5 | 14.4237288135593:1 ******************************************* 30 | 14.2:1 ******************************************
1.9td-5.8cc1.6td-5.2cc1.6na-5.5ccquote]Are those the volumes of just the swirl chamber covers, or the whole swirl chamber, including injectors, heat shields, and glow plugs?
Quote from: "subsonic"1.9td-5.8cc1.6td-5.2cc1.6na-5.5ccquote]Are those the volumes of just the swirl chamber covers, or the whole swirl chamber, including injectors, heat shields, and glow plugs?Just covers, I´ve measured 10-12cc from different heads.
Thats interesting. I've computed the following from engine data tables:1.5 Swirl chamber volume 11.457 cc 1.6 Swirl chamber volume 12.794 cc 1.9 Swirl chamber volume 16.376 cc