I have found out in the uk tdo4 had a variable-vane option does any one know if this is a simple bolt on to any td04 and what the cfm is and if it is manual or electronic controlled.
There is no need for a variable vane turbo on a sled. The purpose of it is to help it spool up at low rpm when there is not much exhaust flow. Where sleds have the clutching setup that they do you bypass this low rpm/low flow situation thus making the variable turbo not worth it.
yes TRUEBLUEMAX everyone says clutch the lag out and i have as much as my system will do. i just think there might be a better way.the only way to get to your boost power range is to increase slip in the lower rpm the tip weight can not be changed due to over revving.if you increase power in lower rpm you can increase weight and spring pressure reducing clutch heat and belt wear.some of these variable-vane turbo's have 4000 to 5000 rpm boost band mine has 2000 so at 6500 rpm i have no boost and my engine is making around 100hp and i am asking it to throw a weight over for 300hp i would rather have 200hp at that rpm it would do the job quicker and it would make my sled better in all situations tree,hill due to more power threw out my rpm range.
I have found out in the uk tdo4 had a variable-vane option does any one know if this is a simple bolt on to any td04 and what the cfm is and if it is manual or electronic controlled.
never seen a none electronic variable vane befor guess one could be ran through boost reference.mabey look into a gtx series i was shocked at how fast they spool compared to the standard garret.or you could try one of these. http://www.dieselperformance.com/index.php/product/index/202P
i looked in to a quick spool valve before. you need a twin scroll turbo for it to work. i thought about putting a scroll on the valve then when i put it together it would make it a twin scroll in theory. but the best these valves do is a 30% gain my boost band is 2000 rpm so i would gain 600 rpm more at best.
That's a pretty common way of making the vgt turbo work with simplicity. It won't be perfect, but with some fiddling I bet you could have something. It would be cool to see someone try it, and possibly make it work to fulfill their needs.
