
● Achar dromchla sonrach mór: chun rochtain iomlán ar an ngás sceite a chinntiú leis an gcatalaíoch.
● Ionsú uisce cobhsaí: chun a chinntiú go bhfuil an catalaíoch ceangailte go cothrom go daingean le dromchla an iompróra catalaíoch.
● Téamh suas: tar éis an t-inneall a thosú, is féidir le teocht an iompróra teocht gníomhachtaithe an chatalaíoch a bhaint amach san am is giorra is féidir.
● Friotaíocht íseal sceite: tá friotaíocht sceite an innill beag, chun a chinntiú nach ndéanann sé difear do fheidhmíocht an innill.
● Neart ard: is é an timpeallacht oibriúcháin atá ag an iompróir catalaíoch ná carr cnapánach, mar sin ní mór don iompróir catalaíoch a bheith ard-neart gan damáiste seachtrach a dhéanamh.
● Dea-thionól: is páirteanna tionóil sceite iad an t-iompróir, ní féidir ach le cuma mhaith agus toisí beachta tionól foirfe a chinntiú.
| Paraiméadair | Tomhas | Caighdeánach | Sonraí tipiciúla | |
| Céim criostail cordierite | Meáchan% | ≥90 | 95 | |
| Comhéifeacht Leathnú Teirmeach (-800℃) | Cm/cm/℃ | ≤1.8x10-6 | 1.3-1.5x10-6 | |
| Cobhsaíocht Theirmeach (550℃) | Amanna | ≥3 | ≥3 | |
| Teocht a Mhaolú | ℃ | ≥1360 | 1390 | |
| Neart Comhbhrúite | A-ais | Mpa | 15 | 16 |
| Ais-B | Mpa | 3 | 5 | |
| Meáchan Sonrach | Kg/L | ≤0.50 | 230-430 | |
| Poróiseacht | % | 40-45 | 41 | |
| Ráta Ionsú Uisce | % | 23-25 | 23.8 | |
| Cruth | Dlús poill (poll/orlach2) | Méid (mm) | Méid (orlach) |
| Babhta | 300 CPSI | Φ101.6 x152.4 | 4×6 |
| Babhta | 300 CPSI | Φ118.4 x100 | 4.66 × 3.94 |
| Babhta | 300 CPSI | Φ118.4 x152.4 | 4.66 × 6 |
| Babhta | 300 CPSI | Φ150 x100 | 5.9 × 3.94 |
| Babhta | 300 CPSI | Φ170 x100 | 6.69 × 3.94 |
| Babhta | 300 CPSI | Φ190 x100 | 7.48 × 3.94 |
| Babhta | 300 CPSI | Φ210 x130 | 8.26 × 5.12 |
| Babhta | 300 CPSI | Φ240 x76.2 | 9.45×3 |
| Babhta | 300 CPSI | Φ240 x100 | 9.45 × 3.94 |
| Ubhchruthach | 300 CPSI | Φ120.6 x 80 x 152.4 | 4.75 × 3.15 × 6 |
| Ubhchruthach | 300 CPSI | Φ144.8 x 81.3 x 152.4 | 5.7 × 3.2 × 6 |
| Ubhchruthach | 300 CPSI | Φ169.7 x 80.8 x 115 | 6.68 × 3.18 × 4.52 |
| Babhta | 400 CPSI | Φ150 x100 | 5.9 × 3.94 |
| Babhta | 400 CPSI | Φ144 x 152.4 | 5.66 × 6 |
| Babhta | 400 CPSI | Φ118.4 x 152.4 | 4.66 × 6 |
| Babhta | 400 CPSI | Φ115.4 x 152.4 | 4.54 × 6 |
| Babhta | 400 CPSI | Φ106 x 100 | 4.17 × 3.94 |
| Babhta | 400 CPSI | Φ103 x 100 | 4.05 × 3.94 |
| Babhta | 400 CPSI | Φ101.6 x 152.4 | 4×6 |
| Babhta | 400 CPSI | Φ100 x 100 | 3.94 × 3.94 |
| Babhta | 400 CPSI | Φ93 x 152.4 | 3.66 × 6 |
| Babhta | 400 CPSI | Φ83 x 152.4 | 3.26 × 6 |
| Babhta | 400 CPSI | Φ80 x 100 | 3.15 × 3.94 |
| Babhta | 400 CPSI | Φ76.2 × 50 | 3×1.97 |
| Babhta | 400 CPSI | Φ60 × 85 | 2.36 × 3.34 |
| Ubhchruthach | 400 CPSI | Φ169 x 85.7 x 115 | 6.65 x 3.37 x 4.52 |
| Ubhchruthach | 400 CPSI | Φ169 x 80.8 x 115 | 6.65 x 3.18 x 4.52 |
| Ubhchruthach | 400 CPSI | Φ148 x 84 x 152.4 | 5.82 x 3.3 x 6 |
| Ubhchruthach | 400 CPSI | Φ144.8 x 81.3 x 152.4 | 5.7 x 3.2 x 6 |
| Ubhchruthach | 400 CPSI | Φ127 x 63.5 x 152.4 | 5 x 2.5 x 6 |
| Ubhchruthach | 400 CPSI | Φ93 x 61 x 90 | 3.66 x2.4 x 3.54 |
| Ubhchruthach | 400 CPSI | Φ120.6 x 80 x 152.4 | 4.75 x 3.15 x 6 |
| Ubhchruthach | 400 CPSI | Φ143 x 98 x 152.4 | 5.63 x 3.86 x 6 |
| Ubhchruthach | 400 CPSI | Φ147 x 95 x 152.4 | 5.78 x 3.74 x 6 |
| Ubhchruthach | 400 CPSI | Φ177.8 x 114.3 x 170 | 7 x 4.5 x 6.7 |
| Neamhrialta | 400 CPSI | 144 x 84 x 75 | 5.67 x 3.3 x 2.95 |
| Neamhrialta | 400 CPSI | 114 x 105 x 115 | 4.49 x 4.13 x 4.52 |
| Neamhrialta | 400 CPSI | 112.2 x 92 x 115 | 4.42 x 3.62 x 4.52 |
| Neamhrialta | 400 CPSI | 119.5 x 99.5 x 115 | 4.7 x3.92 x 4.52 |
| Neamhrialta | 400 CPSI | 120.2 x 108.2 x 75 | 4.73 x 4.26 x 2.95 |
| Neamhrialta | 400 CPSI | 122.3 x 104.4 x 80 | 4.81 x 4.11 x 3.15 |