# 605whp Civic vs 900whp Dodge Diesel **URL:** https://forums.speedlife.net/t/605whp-civic-vs-900whp-dodge-diesel/35279 **Category:** NYSpeed Automotive **Created:** [September 12, 2007, 8:09pm UTC](https://forums.speedlife.net/t/605whp-civic-vs-900whp-dodge-diesel/35279 "2007-09-12T20:09:42Z") **Posts on this page:** 1 **Showing post:** 56
### Author: ![BrockwayMT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/brockwaymt/32/5060_2.png) [@BrockwayMT](https://forums.speedlife.net/u/BrockwayMT) #### Post date: [September 15, 2007, 2:46pm UTC](https://forums.speedlife.net/t/605whp-civic-vs-900whp-dodge-diesel/35279/56 "2007-09-15T14:46:55Z")
A single turbo is only efficient through a limited pressure rise. In a performance diesel it is more about pressure than flow. Airflow is much more consistent in a diesel as it is strictly dependent on rpm and independent of load. You have a smaller variation in flow as well. The Cummins has a sixfold increase in flow from around 500 rpm idle to 3000 rpm for a race pump. Some go 4000 but they probably idle a little higher. Your typical gas engine likely has a tenfold flow variation or better. Point of this is on a diesel your turbo[s] operate over a higher range of pressures but a lower range of flow. Gassers have a lower range of pressure but a higher range of flow. --- _[View the full topic](https://forums.speedlife.net/t/605whp-civic-vs-900whp-dodge-diesel/35279)._