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The Terminator
Turbo Cobras
How can I make my turbo spool sooner?
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<blockquote data-quote="Mark@RealStreet" data-source="post: 9137088" data-attributes="member: 65492"><p>You can continue to try and rip turbine housing out of it but that's the wrong way to go about it. That's simply changing the angle of attack on the turbine wheel and slightly reducing the volute volume. The heavy turbine and compressor wheel are what has a far greater effect on your spool up. They are the things with the weight/MOI that you are fighting. The housing just changes how the air hits it and reduces efficiency.</p><p></p><p></p><p></p><p>That's not necessarily true at all. SOME twins will spool faster than his specific single, and his specific single will spool faster than some twins. It's not nearly that cut and dry.</p><p></p><p></p><p></p><p>Not necessarily. If he has minimal exhaust pressure (which is probably the case at these low boost levels), then the DP change will do nothing but make the car louder. To make decisions on piping (and housing) sizes you need to have pressure sensors so you can monitor what is actually happening. For example if you had a 1.5" downpipe, then sure a change to a 4" would be great probably, but if you had a 5" dp, do you really think you're picking up anything going to a 6" dp? These are just arbitrary numbers to illustrate that everything is application dependent.</p><p></p><p>The tuning tricks will have minimal effect. What you MAY find is that tuning your off-boost power better will make the car quicker before the turbo comes online, and possibly make the transition more linear, but the actual boost threshold will not be effected very much.</p><p></p><p>Plain and simple for a gross change, you need a different turbo. I would definitely suggest a smaller turbine wheel with a large housing over a large turbine wheel with a small housing.</p></blockquote><p></p>
[QUOTE="Mark@RealStreet, post: 9137088, member: 65492"] You can continue to try and rip turbine housing out of it but that's the wrong way to go about it. That's simply changing the angle of attack on the turbine wheel and slightly reducing the volute volume. The heavy turbine and compressor wheel are what has a far greater effect on your spool up. They are the things with the weight/MOI that you are fighting. The housing just changes how the air hits it and reduces efficiency. That's not necessarily true at all. SOME twins will spool faster than his specific single, and his specific single will spool faster than some twins. It's not nearly that cut and dry. Not necessarily. If he has minimal exhaust pressure (which is probably the case at these low boost levels), then the DP change will do nothing but make the car louder. To make decisions on piping (and housing) sizes you need to have pressure sensors so you can monitor what is actually happening. For example if you had a 1.5" downpipe, then sure a change to a 4" would be great probably, but if you had a 5" dp, do you really think you're picking up anything going to a 6" dp? These are just arbitrary numbers to illustrate that everything is application dependent. The tuning tricks will have minimal effect. What you MAY find is that tuning your off-boost power better will make the car quicker before the turbo comes online, and possibly make the transition more linear, but the actual boost threshold will not be effected very much. Plain and simple for a gross change, you need a different turbo. I would definitely suggest a smaller turbine wheel with a large housing over a large turbine wheel with a small housing. [/QUOTE]
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How can I make my turbo spool sooner?
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