12-03-2014, 02:05 PM
Good points Poodle.
From experience the 'softer' action of a bigger slower turbo does help out everything a great deal.
I've seen an LuK run years at 275lbft when used in a soft torque environment (ie, not insta-boost GT15 sudden jump from 100lbft > 300lbft scenario
)
And yes the higher engine speeds mean the HP pump is running faster and can do more work too... just the pistons are moving faster too... but the same IQ's at say 155bhp on a GT15 will make more like 175bhp on a turbo with a nice free-flowing turbine end just due to restriction reduction!
I think the Iveco bits into a K03 hybrid body are a good approach... I think the only bit you 'hybrid' is machining out the standard K03 turbine outlet...
Pete said he's had 185-190bhp on these so they have plenty of potential.
I'm tuning one right now and working up on the outputs slowly to get things really nice, and it's easily making IQ's for 275lbft in the mid-range and making ample air flow for big power at the 4000rpm point too. Currently at 160bhp at 3000rpm and ramping up the top end to get a nice smooth curve.
We'll go higher on torque just to see what it can do but in the end I think it just ruins the delivery if you go too hard on torque.
Dave
From experience the 'softer' action of a bigger slower turbo does help out everything a great deal.
I've seen an LuK run years at 275lbft when used in a soft torque environment (ie, not insta-boost GT15 sudden jump from 100lbft > 300lbft scenario
)And yes the higher engine speeds mean the HP pump is running faster and can do more work too... just the pistons are moving faster too... but the same IQ's at say 155bhp on a GT15 will make more like 175bhp on a turbo with a nice free-flowing turbine end just due to restriction reduction!
I think the Iveco bits into a K03 hybrid body are a good approach... I think the only bit you 'hybrid' is machining out the standard K03 turbine outlet...
Pete said he's had 185-190bhp on these so they have plenty of potential.
I'm tuning one right now and working up on the outputs slowly to get things really nice, and it's easily making IQ's for 275lbft in the mid-range and making ample air flow for big power at the 4000rpm point too. Currently at 160bhp at 3000rpm and ramping up the top end to get a nice smooth curve.
We'll go higher on torque just to see what it can do but in the end I think it just ruins the delivery if you go too hard on torque.
Dave