• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Oilpressure on Turbo GSX -84

  • Thread starter Thread starter Powerwheelie
  • Start date Start date
P

Powerwheelie

Guest
Hi, I?m new on this exellent forum and am from Sweden. I shall mount a turbocharger on my GSX 1100 EF -84 an wonder how I shall do to get oil and oilpressure to the turbo.
The turbo will be place in front of the engine and then I?ll have a plenum behind the carborators. The turbo is a Garrett T28.

:-D Would be very pleased if anybody knows how to solve the problem with oil and oilpressure. Pictures also wanted on the solutions.

As soon as my building begins I will post pictures regular here on the forum.

Best regards
Powerwheelie
Sweden
 
Powerwheelie said:
Hi, I?m new on this exellent forum and am from Sweden. I shall mount a turbocharger on my GSX 1100 EF -84 an wonder how I shall do to get oil and oilpressure to the turbo.
The turbo will be place in front of the engine and then I?ll have a plenum behind the carborators. The turbo is a Garrett T28.

:-D Would be very pleased if anybody knows how to solve the problem with oil and oilpressure. Pictures also wanted on the solutions.

As soon as my building begins I will post pictures regular here on the forum.

Best regards
Powerwheelie
Sweden
Click to expand...

What oil pressure does the T28 require? The GS/GSX motor is a low oil pressure/ high flow system. You may need to pipe in an auxillary electric oil pump to scavage oil from the oil sump.

Hap
 
You can increase the oil pressure by changing the oil pump gears. They can be obtained from APE or a similar performance supplier, or you can use a set of gears from a 750, although I'm unsure about what year. Perhaps another GSer can shed more light on that subject. As far as getting the oil to the turbo, a top end oiler system will route the oil out of the crankcase to the cylinder head for improved oiling. I'm sure you can tie into the lines to oil the turbo as well. Again APE or similar supplier would be a source for those parts.
 
Powerwheelie said:
Hi, I?m new on this exellent forum and am from Sweden. I shall mount a turbocharger on my GSX 1100 EF -84 an wonder how I shall do to get oil and oilpressure to the turbo.
The turbo will be place in front of the engine and then I?ll have a plenum behind the carborators. The turbo is a Garrett T28.

:-D Would be very pleased if anybody knows how to solve the problem with oil and oilpressure. Pictures also wanted on the solutions.

As soon as my building begins I will post pictures regular here on the forum.

Best regards
Powerwheelie
Sweden
Click to expand...

I thought they only run one pump for the return line on the funny bikes. Go to www.dragbike.com, forums, turbocharger and post your questions there.
 
RJ said:
You can increase the oil pressure by changing the oil pump gears. They can be obtained from APE or a similar performance supplier, or you can use a set of gears from a 750, although I'm unsure about what year. Perhaps another GSer can shed more light on that subject. As far as getting the oil to the turbo, a top end oiler system will route the oil out of the crankcase to the cylinder head for improved oiling. I'm sure you can tie into the lines to oil the turbo as well. Again APE or similar supplier would be a source for those parts.
Click to expand...

The gears out of a '76 to '82 GS750, either 8 or 16 valve, will work but will not provide the pressure increase that he is looking for. The oil pump gear ratio for the 1100 gears is 34/33 and the 750 gears are 38/29. The total flow will increase but the actual pressure will increase only 5%, if that much. There is not enough restriction in the oil system to push the oil pressure up. I've run them for years on my '81 GS1100E mainly to increase the flow to the valve train. I've noticed a small increase when the oil is cold but once the motor was up to temperature there was no difference in pressure.

Hap
 
Turbo's do not need much as far as oil pressure, if you restrict the drain-tube on my '87 Dodge shelby z (factory intercooled turbo) it will push the oil past the seals on the turbo and it will smoke like a bug fogger! in fact if the pcv is not working correctly on it, it will smoke badly also. The stock oil pressure should be plenty. But I would make sure the return to the sump is non-restictive and you should be fine.
 
On a GS1000 motor and probably the 1100, if you take off the oil pressure switch plate on top of the center of the cases, you will see 3 holes. The oil feed is in the center hole. The front hole delivers oil to the top end. The rear hole feeds oil to the transmission. I run a .125" restrictor in the feed hole to the transmission on my drag bike. This re-directs more flow to the top end. The transmission and the input/output shaft bearings are pretty much bullet proof and will survive nicely as long as they have some flow to them. They are in a wet sump and get oiled plenty......This is how you did it back before top end oiler kits were available. The whole top end oiler set up was probably born from engine builders putting piston kits in that were so large that the oil passage from the upper case to the cylinder block was compromised.......BadBillyB
 
Powerwheelie said:
Hi, I?m new on this exellent forum and am from Sweden. Powerwheelie
Sweden
Click to expand...


Welcome to the GS paradise! \\:D/
 
I have done quite much investigations about this subject and also some experiments with my turbo GS1100.

At first it seems to be very difficult to find oil pressure requirements for different turbochargers. But I have understood that ordinary turbo with plain bearings needs about 2 bar (30 psi) under full load and something like 0.2-0.5 bar (3-7 psi) at idle. Turbos with ball bearings will survive with smaller pressure.

Then about my experiments with GS. Without modifications the oil pressure was way too low, like I expected. The 750 pump gears helped a little but not enough. Then I made a restrictor plug which goes to place of the oil pressure switch. This plug robs all the oil coming from the filter. The turbo gets unrestricted flow but the rest of the engine gets it's oil through small restriction hole. With the 750 pump gears this gave about 3 bar (45 psi) for the turbo at 5000 rpm and the pressure in the main oil gallery was still more than in stock engine. So now both the engine and the turbo should be fine. I have already tested this for about 5000 kilometers without problems. If you are interested I can send some pics and more detailed measurement results when I get back to my home PC.
 
You must log in or register to reply here.
Back
Top