I was thinking the other day abuot how to spool up the turbo quicker and with out having to idil up the engine. And i thouhgt of this. If you coudl somehow inject pressureized air into the exhaust housing before launch to get that turbo going before you go. it seems liek a good idea but what do yall think. yall might think its crazy. i think of alot of crazy things. ive hooked up air horns to the exhaust before and other things that make my dad shake his head. but what do yall think of the spoolign up of the turbo?

 

I think your crazy...

 

please tell us about the air horns first........

 

Do you have a shop air compressor?
Look at the size of the shop hoses you use then look at the ones on the intake of your CTD. Seems like you would need a tank as big as the bed to do much good.

 

You'd have to have something that pushes more air than a large Shop-Vac at about 20 psi, that's for sure!

 

The only thing that would deliver enough energy (that I can think of) would be a kind of combustion chamber in the exhaust manifold. Injecting fuel and air, igniting it would maybe give enough energy to spin up the turbine. Since diesels do have a high oxygen content in the exhaust you could get away with fuel only. But if a droplet would hit the turbine blades you'd have massive problems. Maybe a gas burner..... - with a spark plug to ignite the gas.
I don't think that you'd get enough air in (especially cold air) to spool a turbo significantly. Lots of hte energy the turbine delivers comes from the delta T through the turbine (roughly 300F) and not from the pressure drop without cooling. Pressure only turbines like in airtools have completely different geometries.
I think it could prove worthwhile to insert some energy to get the EGTs up at idle to prespool the turbo.

Just pondering

AlpineRAM

 

" A NITROUS BOTTLE WOULD HAVE ENOUGH PRESSURE TO SPIN IT UP FASTER!"

 

IF there was a cost-effective way to spool the turbo faster, you can bet an OEM would have adapted it, since lag is the main reason people don't buy turbo cars.

justin

 

its called AIR IMPINGMENT. I work for a Caterpillar dealer in North Dakota and i don't do the engines, that said............ we have a generator in the state prison (a 3512) that has the coolant heated and circulating all the time and the oil pumped at a preset pressure constantly also. when the commercial power drops and the controller switches to the generator it is quick!! there is a air compresser off to the side maintaing 125 psi and when the command comes it is dumped through a nozzle aimed at the end of the intake fins, not in the opening, but through the cold side housing at a angle to hit the tips of the comperssor blades to spin the turbine up instantly and naturallly just blow into the intake to provide air pressure. dont know if its ture but it think its been said they don"t even loose the computers ( hard to believe). of coruse this has left me trying to figure a way to mount the air compresser like on the air brake trucks(a different timing gear cover housing,and they say there's not the room in the engine compartment), a holding tank(s) under passenger floor. micro switch on the throttle linkage and a modified cold housing,solonoid and more fuel.

 

Twin Turbo's?
One for the lower rpm range and the second for the higher rpm range.

I know this isnt what you were looking for. I dont know how to get a single (stock) turbo to spool earlier other than just getting more fuel through.

Rich

 

a high temp NOS nozzle with nos and propane being injected into the exhaust. it hopefully would ignite and spool up the turbo...
...or go VGT/VNT turbo. they spool almost instantly

 

Thats interesting.....any idea what kind of sizes....hoses that run to the nozzle, and the nozzle size?

I have an old 59 chevy 5 ton with air brakes, the compressor is fairly small......but what about using and air tank and the electric compressor from say the air bag set ups? Assuming it actually works.....I have the electric compressor I ve been wanting to mount on my truck...I guess I could try it , I have some solinoids and nossles.....but Im not convinced. Interesting though.

OEM s would not do it due to cost and reliabilty most likely.

 

Lots's of large 2 stroke diesel and gas engines us high pressure compressed air to get the turbo rolling before they start. Since it's a 2 stroke they need scavaging air before they can even start, thus the necessity of getting the turbo going before you crank the engine. Should work on a little 4 stoke as well.

 

Yep, our pure turbocharged 2-cycle engines use starting air to provide jet assist to the turbochargers for starting and idling conditions. This air is injected through nozzles onto the blades of the turbocharger's compressor impeller to get it rolling, and then the air is throttled to maintain between 2.0" and 3.5" Hg boost. Typically, the jet assist is turned off once boost exceeds 3.5" Hg and the engine becomes self-sustaining.

We test our turbochargers on a rig called a "bootstrap" In this rig, the turbo compressor discharges its air through an adjustable valve (with which we can vary boost & flow) and then into a combustor can. In the combustor, this air is mixed with an adjustable supply of natural gas, ignited and then sent to the turbine inlet. In effect, we turn the turbocharger into a gas turbine that we can run through its operating range and "map". In the case of our trucks, if there's enough excess oxygen to allow combustion, methane or propane could be injected into the exhaust ahead of the turbocharger's turbine to promote spool-up or to spool the turbo up while sitting at the lights at a dragstrip. I'll just let you test the appropriate settings on your truck first!

Rusty

 

Sorry about the thread hijacking... Yeah, those automatic transfer switches are pretty neat. I installed one each, with generators, at two fuel stations in 1999. They were preparing themselves for the big Y2K power outage. I would simulate a power outage and the computers stayed up, and the lights wouldn't even flicker. These generators weren't as serious as yours sound though. These only had block heaters, so the the engine was up to temperature and could handle full load immedietely.