[Nezil]

Some extra calculations:

The extended jets have an integrated check valve with a 1bar / 14.5 PSI break point. I've therefore got to either increase pump pressure to compensate, or adjust my calculations for flow accordingly.

Running the calculations again for a twin jet charge pipe install, and a target HP of 450 for headroom:

- 450 HP x 1.5 cc / min / HP = 900 cc / min required
- 160 PSI (pump pressure) - 17.5 PSI (boost pressure) - 14.5 PSI (check valve) = 128 (PSI to the jet)
- 900 cc / min ÷ 2 jets = 450 cc / min / jet

Looking at the chart 130 PSI column, 0.9 mm jet would provide 394 cc / min, and the 1.0 mm jet would provide 462 cc / min. Looks like Richard's suggestion fits in line with this calculation.

For a 6 port (7 jets) installation, the calculations would look like this:

- 450 HP x 1.5 cc / min / HP = 900 cc / min required
- 160 PSI (pump pressure) - 17.5 PSI (boost pressure) - 14.5 PSI (check valve) = 128 (PSI to the jet)
- 900 cc / min ÷ 8 (6 x DP + 1 x CP jets) = 112.5 cc / min / DP jet + 225 cc / min CP jet

Looking at the chart 130 PSI column, I'd need 6 x 0.4C for the DP jets (130 cc / min) and either a 0.6 (223 cc / min) or 0.7 (228 cc / min) jet for the CP.