16-01-2012, 02:03 PM
Sorry for the double post, on my phone so its more of a faff to reply
As far as I understand it ginge the smaller turbo will spool up sooner in the revs thus giving you more boost sooner in the revs so providing you can supply the fuel to burn you would get more power sooner in the revs which would tail off qicker than with a larger turbo due to the smaller turbo going outside its efficiency range sooner if that makes sense?!
ginge191 Wrote:Dan! Wrote:Which is why a TD04 at 25psi will be fairly reliable and produce ~160hp with the fuelling to match, and a GT15 at 25psi will be spinning it tits off, producing a very hot charge and only about 130hp.
On this note - in terms of torque and A/R ratios - this is what im primarily trying to understand at the moment.
using your exmaples, would the GT15 have a greater low end torque due to a quicker small time? or would it mean both turbos create the same torque, but through a prolonged period?
What im trying to achieve is the best possible low end torque and through reading, understanding that the larger turbo's have a greater a/r as apposed to smaller turbos creating a larger bhp? but not necessarily a decent low end boost?
clarification or am i getting this confused?
appreciate the patience
As far as I understand it ginge the smaller turbo will spool up sooner in the revs thus giving you more boost sooner in the revs so providing you can supply the fuel to burn you would get more power sooner in the revs which would tail off qicker than with a larger turbo due to the smaller turbo going outside its efficiency range sooner if that makes sense?!