maat's idea reborn (sequential turbo)

[Boosted98gsx]

Ok the problem with this is that it will be unmettered air going into the intake. Thus causing you you run lean. And if you where to put it into the TH the expansion from compressed gas to air pressure would cause a huigh temp drop and thus pretty much just cancel it's self out due to the decreased exhaust temp. Lower temp air is smaller and thus causes a smaller force on the Turbin blades.. If you have a blow through MAF then maybe it might have some merit.... It's just compressed air so it's not pure O2 which is extreamly explosive and so dangerous it should never be done.... But I'mt not to sure is force on the compressor wheel is going to help spool all that much... You can try it and see what happens but I'm guessing that a lot will just escape out the intake pipe...

He's talking about using compressed air to "inject" the exhaust manifold runners to try to spool the turbine blade faster.

 

[FireyIce01]

Ok the problem with this is that it will be unmettered air going into the intake. Thus causing you you run lean. And if you where to put it into the TH the expansion from compressed gas to air pressure would cause a huigh temp drop and thus pretty much just cancel it's self out due to the decreased exhaust temp. Lower temp air is smaller and thus causes a smaller force on the Turbin blades.. If you have a blow through MAF then maybe it might have some merit.... It's just compressed air so it's not pure O2 which is extreamly explosive and so dangerous it should never be done.... But I'mt not to sure is force on the compressor wheel is going to help spool all that much... You can try it and see what happens but I'm guessing that a lot will just escape out the intake pipe...

What if you use a blow through MAF... talk to some machinists... maybe have an angled port drilled and tapped into your turbo's compressor housing, and plumb the line in at such an angle that it blows hard enough on the blades to keep 'em spinning... It's funny you mention this, because me and my roommate were shooting around an idea of putting a compressed air tank in his bug (yea, his bug) with an expansion chamber before his carb to have that instant on couple second boost... but I don't think it would work... was just one of those completely random ideas we came up with... *shrugs*

 

[Maglin]

Well the problem with shooting compressed air on the turbin blades is that the air comeing out is going to be very cold which can greatly reduce the exhaust pressure due to lower temps.. You follow that... Ok the idea has good merit though... I'm not saying don't do it.. Tap mid way into the TH at the blades section and shoot compressed air directly at the blades with a high pressure nozzle... Yeah I can't spell... Slightly hung over as well... That shouldn't effect the exhaust pressue any and you should see the gains you are looking for... Also the nozzle can't extend into the housing so you don't impeed airflow and also so you don't accidently hit the turbin wheel.... I would say you would want something like 300-500 psi of charge to make a noticable difference but use a regulator and try out some various pressures.. That is my spin on it... You can use one of those small 5 gal air tanks... They don't weight much but you won't be hidding it very easily...

 

[burldude]

Exactly what I am talking about I installed my msd yesterday and to all those that say they didnt notice anything . WOW, how couldnt you ?

My parts guy will be in monday and I will see if he has located me a 12 volt solenoid that will handle 300psi . I dont see the volume of air being injected as being a problem as it will be verry low on the cfm . I am going to get the system all together before I go and tap a Garret Gt . Has to be proven first . I think that I will give my spare 14b a spin with some compressed air and see what it does in such close proximity to the tubine. Needless to say there will also be exhaust gasses flowing through in the real world. I figure spoolup time will be cut in half . I did a clutch wire mod yesterday and this compressed air would be awesome with it .

 

[Maglin]

You can have it open the air up when the system is active when you press in the clutch keeping the turbo spooled when your no lift to shift...

 

[burldude]

Awesome idea . I will have to learn more about the clutch wire and voltages there and then apply it . I like the idea I see a little problem with that though with the turbo running and causing it to run lean or rich .

 

[Gigaah]

in some reading I've found that an vehicals AC compressor is a very powerfull air pump. Jeep owners seem to have great sucess turning their AC units into very solid Air compressors. I heard two claims for a "York" AC compressor. 40 PSI constant with an air nozzle wide open, and one said it was a 400psi 20CFM unit..thouhg I don't particularly buy that big of a claim. They have info on oil seperators and recyling the oil back into the compressor/out of the air ..one guy runs it dry of oil. shrug

http://www.off-road.com/ford/bigbroncos/tech/ac_conv.html

 

[hellotbone]

Posted this before this IS THE ONLY WAY IT WILL WORK its got to be compound the smaller turbo spools the larger.

This is how we do it on the diesel pickups! There is ZERO lag and they are capilbe of 120+ PSI.

 

[95kate]

wow that looks mean. question is... how does it work?

 

[FireyIce01]

Tell me, does this have some special turbine housing that has a single input for both turbos?

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http://www.rx7.com/store/rx7/fdturbo.html

Posted this before this IS THE ONLY WAY IT WILL WORK its got to be compound the smaller turbo spools the larger.

This is how we do it on the diesel pickups! There is ZERO lag and they are capilbe of 120+ PSI.

This is what I was talking about... but there was a consensus that the smaller one wouldn't allow the large one to get enough air, and surge, and other random stuff... that's what I would have done if I was planning a twin turbo setup...

 

[thekellbeast]

There is ZERO lag and they are capilbe of 120+ PSI.

That's prettymuch useless on a gasoline engine. I'd love to see him try to tune that for pump gas. :laugh:

 

[FireyIce01]

That's prettymuch useless on a gasoline engine. I'd love to see him try to tune that for pump gas. :laugh:

Perhaps... but how many PSI do you think Methanol would handle?