Performance Boats Forum banner

1 - 20 of 51 Posts

·
Registered
Joined
·
100 Posts
Discussion Starter #1
just picked up a stage III twin turbo set up .very complete low hours in great condition.any one have a plumbing diagram for reference i know most of it but there are a couple solonoids and hoses i am not 100% sure of
 

·
mo balls than $cents$
Joined
·
11,734 Posts
cool deal! you'll enjoy it! hollar at hass828 if ya have any q's bout it all, he knows em veryyyy well.
 

·
Registered
Joined
·
100 Posts
Discussion Starter #3
twin turbo

hey thanks for the info i will look him up i have played with them(have a twin turbo rat rod ) before and i know a gentleman that built some of the first prototypes for gale banks .a wealth of knowledge there.
 

·
Registered
Joined
·
100 Posts
Discussion Starter #5
twin turbos

Hass 828,you are the man ,thanks for posting the diagrams.i already see a couple things that i had wrong like i thought hot water went through the carb base.i am already getting slack from the race car locals about baby blowers and no fuel injection.but hey i will take em for a ride and then see how they feel.thanks again hope to have her done by april or so
 

·
Registered
Joined
·
100 Posts
Discussion Starter #7
banks set up

thanks for the replys.i am collecting a lot of info and will change a few things.i noticed this was set up for the water to go thru the carb mount instead of oil .maybe it was better since the t shield had hotter water to warm the mount floor
 

·
mo balls than $cents$
Joined
·
11,734 Posts
thanks for the replys.i am collecting a lot of info and will change a few things.i noticed this was set up for the water to go thru the carb mount instead of oil .maybe it was better since the t shield had hotter water to warm the mount floor
hass had his using water thru it too, but i think he eventually bypassed it all together.i think they expect these kits to be used during the winter or something, only reason you'd need a heated carb mount box that i can see, summertime the fuel evaps well nuff on its own before injesting into the turbs.
 

·
www.highflowdynamics.com
Joined
·
1,161 Posts
just picked up a stage III twin turbo set up .very complete low hours in great condition.any one have a plumbing diagram for reference i know most of it but there are a couple solonoids and hoses i am not 100% sure of
tomply32, I just bought a complete Gale Banks twin turbo system as well. Turbos are a new territory for me. I don't mean to hijack your thread but rather hopefully shed some light onto what you might have (or might not have) just purchased yourself.

In my case, the system uses the Rayjay turbos, and they are in fine shape (a turbo rebuilding friend of mine looked them over). These Rayjays also have the cast-iron water jacketed exhaust housings. Here is what you might want to look at with your turbo housings on your Banks system:



Looking up into the turbo from the exhaust flange (which bolts to the transom log/header flange), you can see where the exiting exhaust is sent through the turbine vanes (red arrow). But, there is also a bypass port (blue arrow) which diverts exhaust from the turbines and sends a major portion of the exhaust straight to the exhaust pipes! My guess is that this is a built-in "governor" which acts like a pre-set waste gate and keeps boost down (due to the day cruiser application of these turbo systems). You might want to see if your housings have this feature.

Hass828, how much boost can be gained by tapping an NPT thread into that bypass hole and plugging the bypass altogether? On a 0.030" overbored big block, for example, might this increase boost from say, 6 psi to perhaps 10 psi or more? Or would waste gates be mandatory if I plugged that bypass port completely? What about drilling, say, a 0.250" hole into the newly installed bypass plug so as to limit the amount of exhaust that is bypassed (regulate boost that way)?

Thanks,

LO
 

·
www.highflowdynamics.com
Joined
·
1,161 Posts

·
Registered
Joined
·
100 Posts
Discussion Starter #11
gale banks turbo

you are right the holes were for limiting boost not really pre bov but i think more user friendly.your intercooler as far as i know would be either pfm(performance first marine)or gale banks.the cores i dont have a clue i have seen two types one with small piping(could be homemade)and one with what looks like a heater core, thats what i have .i am not looking for max horsepower out of the rajays.you would want to go with turbonetics.either way you are limited with a draw thru carb setup.but hey whats wrong with 850 h.p. thats what the original gale banks stage 3 was rated at.i am working now on getting the motor that my set up came off of.it is a gale banks preped offshore motor just gone through hope i get it .what are you putting your in? hass is the guy to talk too
 

·
Registered
Joined
·
100 Posts
Discussion Starter #12
gale banks twin turbo

hey keep the info coming we all could learn a lot here.i have played a little with turbos in the past and i am catching up on all the new technology.
 

·
Registered
Joined
·
6,278 Posts
tomply32, I just bought a complete Gale Banks twin turbo system as well. Turbos are a new territory for me. I don't mean to hijack your thread but rather hopefully shed some light onto what you might have (or might not have) just purchased yourself.

In my case, the system uses the Rayjay turbos, and they are in fine shape (a turbo rebuilding friend of mine looked them over). These Rayjays also have the cast-iron water jacketed exhaust housings. Here is what you might want to look at with your turbo housings on your Banks system:



Looking up into the turbo from the exhaust flange (which bolts to the transom log/header flange), you can see where the exiting exhaust is sent through the turbine vanes (red arrow). But, there is also a bypass port (blue arrow) which diverts exhaust from the turbines and sends a major portion of the exhaust straight to the exhaust pipes! My guess is that this is a built-in "governor" which acts like a pre-set waste gate and keeps boost down (due to the day cruiser application of these turbo systems). You might want to see if your housings have this feature.

Hass828, how much boost can be gained by tapping an NPT thread into that bypass hole and plugging the bypass altogether? On a 0.030" overbored big block, for example, might this increase boost from say, 6 psi to perhaps 10 psi or more? Or would waste gates be mandatory if I plugged that bypass port completely? What about drilling, say, a 0.250" hole into the newly installed bypass plug so as to limit the amount of exhaust that is bypassed (regulate boost that way)?

Thanks,

LO
Lakes if you block the bypasses you will need to install wastegates or you will overspeed those small turbos and they will eventually come apart. You can adjut the hole size and probably turn the boost up to 15 or so but be careful on pump gas at some point just past there it will detonate.
 

·
Registered
Joined
·
854 Posts
Hass828, how much boost can be gained by tapping an NPT thread into that bypass hole and plugging the bypass altogether? On a 0.030" overbored big block, for example, might this increase boost from say, 6 psi to perhaps 10 psi or more? Or would waste gates be mandatory if I plugged that bypass port completely? What about drilling, say, a 0.250" hole into the newly installed bypass plug so as to limit the amount of exhaust that is bypassed (regulate boost that way)?

Thanks,

LO
My old RaceAero setup on a 460 CI BBC, Performer RPM heads and a small SR cam made 13lbs (5400 rpm on a AA) with the holes in the exhaust housing completly open, i then blocked them off to about a 1/4" and boost went up to 18lbs (5900 rpm). My guess was about 750-800hp @ 18lbs. I was going to put the setup on a BBF and i mocked it up with some addapters from C. Evans and it was going to work out pretty good but i decided to go another direction. Like Hass said, its real easy to over spin those little turbos and they will start to puke oil and destroy the center section. Doing it agian i wouldn't go over about 10lbs boost on a BB, i personaly toasted a few RayJays on that deal. :)
 

·
Premium Member
Joined
·
3,360 Posts
The intercooler cores were made by Harrison Radiator, a division of GM since 1916 and later Delphi to the present day. The part # is # 8533329. I have a pair still in good shape. They were made of cupranickle. The bypass holes can be plugged and then you will need to control boost with wastegates. I think I have a pair of non drilled housings somewhere. The turbos are probably capable of 20#+ so boost control is a must. The cores measure 33/16 x 37/8 x813/16. The mounting flange measures 43/4 x 57/8. Pics will be added when it gets brighter outside.
 

Attachments

·
www.highflowdynamics.com
Joined
·
1,161 Posts
Wow, thanks for all the detailed replies, everyone. It sounds like I should probably pull the exhaust housings from the turbo assemblies, tap the bypass port but leave it completey open/unplugged, then see how much boost registers with the system as it is and decide later if I should plug the holes/install plugs with smaller bypass holes, etc.

I understand that in the interest of longevity and reliability the smallish Rayjays shouldn't be spun too high, and yes, an 800-850 hp engine combo is all I was shooting for with this system....which I intend to use for a learning platform before the a later TT build down the road.

steveo, I might be talking to you later about the intercooler cores/info.

Thanks,

LO
 

·
Premium Member
Joined
·
3,360 Posts
most of the Rayjays that were drilled were to make 15# boost max. I will be taking one of these intercooler cores to a guy that has a shop next to Superdave's and see if he can get them made. It is what he specializes in. Also taking a Lee intercooler.
 

·
Registered
Joined
·
6,278 Posts
Wow, thanks for all the detailed replies, everyone. It sounds like I should probably pull the exhaust housings from the turbo assemblies, tap the bypass port but leave it completey open/unplugged, then see how much boost registers with the system as it is and decide later if I should plug the holes/install plugs with smaller bypass holes, etc.

I understand that in the interest of longevity and reliability the smallish Rayjays shouldn't be spun too high, and yes, an 800-850 hp engine combo is all I was shooting for with this system....which I intend to use for a learning platform before the a later TT build down the road.

steveo, I might be talking to you later about the intercooler cores/info.

Thanks,

LO
I turned the boost up to 25psi once and had a turbo come apart bad enough that the turbin went out of the exhaust pipe and knocked a hole in the pipe on the way out. Sounded like a bullet ricochet'd off the engine. I wouldnt have wanted to have been in the way of it when it came out of there. Could hurt someone in a bad way.
 

·
Registered
Joined
·
854 Posts
I turned the boost up to 25psi once and had a turbo come apart bad enough that the turbin went out of the exhaust pipe and knocked a hole in the pipe on the way out. Sounded like a bullet ricochet'd off the engine. I wouldnt have wanted to have been in the way of it when it came out of there. Could hurt someone in a bad way.
Mine never came apart but they wobbled around about a 1/2". Didn't know what caused the first failure, thought maybe to much oil pressure but after asking a few turbo guys about them they said it wasn't from the oil pressure so i just figured it was a fluke but after the second one i figured it out. :)st

Paul, if you don't ask too much from the little RayJays they will be a very reliable power adder for you, plus they look and sound cool too.:D
 

·
Registered
Joined
·
620 Posts
most of the Rayjays that were drilled were to make 15# boost max. I will be taking one of these intercooler cores to a guy that has a shop next to Superdave's and see if he can get them made. It is what he specializes in. Also taking a Lee intercooler.
What size bypass holes were used on the older banks kits with the small rayjays.
 
1 - 20 of 51 Posts
Top