I think I might have found a way to use my HY35 in a twin setup?? They would need a much smaller exhaust housing for it work. But I have a lot of good about them. ststurbo

 

Keep reading. Squires doesn't offer anything that would work on the Cummins!

 

Oh I know. It is a cool concept. This actually will let mee to complete a couple ideas I had on the side. Sorry non diesel----Gasser projects!

 

I have actualy thought alot about that process. It would all be real clear to me if I could just understand what has to be done for fuel delivery. Comming up with turbo size and running the duct work would be easy. I have heard that you can set up a vacuum or throttle position advanced fuel pressure pump, but is that all it would take . I have been looking all over for info, but it is hard to find.


If you learn any more about this process please pm me

good luck

 

Another problem is the oiling. Wonder if they use a special pump or is it an off the shelf unit. You could use a rising rate fuel pressure regulator, Or even just an extra fuel injector wired up with a Hobbs switch

 

With how little pressure is used, the MAF, and injectors can still supply enough fuel to keep the vehicle in a "rich" condition, sometimes you need to piggy back an auxillary fuel pump to keep injection pressure up.

As far as oiling, the use oil pressure from teh engine oil pump just like we do on our Cummins, but they have a special designed pump to pump the used oil back into the crankcase. The Oil temperatures stay cool becuase of how long the oil lines are, the air stays cool because the long pipes act as intercoolers, and underhood temps stay low becuase there isn't a bunch of exhaust pipes cramped in a small compartment.

My $.02

Merrick

 

There's a Camaro in my area with one of those. I can pull away from him in 5th.

 

but what happens when you are off road and try to cross a river? What would happen if we just had someone make up an header for us that had 2 different places to mount the turbos? then run 2 intakes into 1. Whould this work?

Coop

 

More lift & bigger tires!! 2 different turbos like in the normal "twin" setup, or like a parrallel configuration? The parallel is usually done on gassers, and on a V engine there is normally a turbo on each side, 2 seperate intakes, that combine either before or after an intercooler, if used. Not sure if twin parrallel turbos would work. We use twins to build more pressure, and to keep the lag of using a big single down. HTH, or i completely misunderstood your question.

 

Why would the turbo oil return line need a pump? I would think that the presssure that pushed it their, would push it back to dump in the valve cover or oil pan.

So would you adjust the variable fuel psi so that your plugs did not get white or?

Off road problems? The application I have thought about is a 4.0 liter jeep cj (would love to do a 4bt, but not sure I want the wait?), and I thought that I would mount the turbo as high as I could under the truck and run a snorkle up the roll cage to get clean air (maybee evan use the roll cage as the snorkle tube??

btw awesome thread

 

From my readings on turbos, they do not like any restriction on the oil return/drain line. Any resistance, the oil finds/makes a path past the seals and you go mosquito fogging. Thats why the oil return line is much bigger thatn the supply line on our trucks. I didnt check that system enough but on that knowledge I would say the pump might be on the return side and engine oil pressure feeds the turbo. Or at least thats how I would do it. use a small dry sump pump that has a pressure and 1 scavange side.

As for adjusting the fuel pressure, ya need an EGT, and a A/F gauge. and I believe max power is ~12.0:1 A/F Many ways to add fuel some safer than others. Tricking the computer, boost foolers, extra injectors on a pressure switch, you ultimately have responsiblilty of the tune of the engine. So if it goes lean and ya burn a piston, ur fault. A safer way is an aftermarket engine management system. Or a piggyback system that might work the stock ECM and run all the "out of design parameters" ie boosting an engine that was normally aspirated from the factory. The ECM has no idea what to do if it sees boost. Not to mention the map sensor is not designed to read pressure. You would need a 2 or 3 bar map sensor. For a cheap and DIY fuel system search "megasquirt"

Dont think the rollcage would work, you would have to figure the max air the engine will draw in, CFM and then figure what the roll cage tube could flow. I would run a separate snokle. On that site, they had that 'Yota going through puddles, so since the exhaust is much cooler back there, the cold water is as much of a shock to the turbo exh housing.


EDIT found it Megasquirt They have come a long way, When I first found them, you could order that parts and download the board layout and download a pregram to get it running. WOW I got some more reading to do.

 

Yah megasquirt looks cool. I am still thinking of what MCummings said about stock system supporting a little boost. How much is a little and what gains can be achieved at that point. From what I have read 5-7psi can help alot. I am just hopping to scavenge lost power that normaly goes out the tailpipe. Could the stock ecm and fuel pump support 5psi????


As far as the roll cage snorkle, I would size it to work correctly. A diesel uses (from what I have read) 7 times the air as a gasser, so if 4" is good for 500hp and 4? psi boost, 3" should be good for 300hp in a gasser??


just my .002 lets keep the discussion going

 

As far as the stock system supporting boost, it really depends on the "programed" limits of the stock ecm. If the ECM has the ability to read a small amount of boost, and the fuel required at a given boost is within the fueling map of the ecm, then yes it can support the boost. A good book is "Maximum Boost" by Corky something, and I believe "Tubeochargers" from another author whise names escapse me at this time. I do have both books but cant go check the authors now. They go over air requirements and tons of other things. Good reading IMHO

 

2500 CTD,


I did a little reading and those books look good. Hopefully I will get those and read them soon.

thanks

 

any new thoughts?

I want to turbo an inline 6 gasser either the 4.2 carbed stock jeep motor or the 4.0 if I convert it? The 4.2 is carbed and a 4.0 would be injected.

thanks