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Got some parts, need help...

  1. #1
    Loose Nut on the Wheel michaellone's Avatar
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    Default Got some parts, need help...

    I have come across a pair of turbos and a MSD Marine Boost Timer from an old turbo setup (The price is right!). Help figure out what I have and if it would be a good fit for my motor.



    2 Rajay Turbos (3AJ1EE13B1)

    I know that the turbos were recently rebuilt by the previous owner and have no time on them.

    My current motor is:
    454 (.030 over)
    Billit splayed mains
    Forged Crank
    Scat H-beam rods with L-19 bolts
    TRW pistons (9.4 compression)
    Chevy 820 iron heads
    Torquer 2 intake
    Holley 850 carb
    MSD 6AL
    MSD distributor

    Goal: 800+ hp on pump gas (E-85 is available in my area)

    Any help you guys can give on this is appreciated. I just trying to get some info first. Thanks.
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  3. #2
    Loose Nut on the Wheel michaellone's Avatar
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    After doing some web searching, I found this our about the turbo:

    "That rayjay is a 301 series with a E compressor and an E turbine, and a 1.0A/r. Its flow map is identical to a AiResearch T04b with a V1/V2 compressor."

    Not sure if this helps....

  4. #3
    mo balls than $cents$ IMPATIENT 1's Avatar
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    pm hass828 he's got a pair of rayjays kinda like those on his stealth and is making some very good power with em.

    Dare to be different, if it turns out great you can claim you planned it that way.

    Jetboatperformance.com

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  6. #4
    Senior Member Hass828's Avatar
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    Those turbo's are basically the same as the t04's that I'm running. I started out with a set just like'em. They are expeensive to have redone so when you wear them out you most likely end up with a set of to4s to replace them with. Much more cost effective. They should make 15-20psi easily and make your goal. I'd run the e-85 if available. It'll allow you to lean on it harder and get more out of it. My .02

  7. #5
    Loose Nut on the Wheel michaellone's Avatar
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    Thanks for the input. Going to do some more digging so I know what I am getting into.

  8. #6
    Loose Nut on the Wheel michaellone's Avatar
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    After doing some reading, I am getting a better understanding on how this setup works. Now I think I know enough to ask intelligent questions.

    The two things I have not been able to find out is wastegates and blow-off valves.

    How do I tell what size I need for my application?

    Are the ones on ebay worth buying or do I need to spend $300+ per valve to get the name brand ones?

    I assume that I need a wastegate mounted right before each turbo and a bov before the turn-down going in to the carb. Is this the correct way to manage my boost?

    Hass828, you said that I should make 15-20psi easily with my setup. Is there any problem turning down the boost (5-7psi) until I get everything sorted out?

  9. #7
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by michaellone View Post
    After doing some reading, I am getting a better understanding on how this setup works. Now I think I know enough to ask intelligent questions.

    The two things I have not been able to find out is wastegates and blow-off valves.

    How do I tell what size I need for my application?

    Are the ones on ebay worth buying or do I need to spend $300+ per valve to get the name brand ones?

    I assume that I need a wastegate mounted right before each turbo and a bov before the turn-down going in to the carb. Is this the correct way to manage my boost?

    Hass828, you said that I should make 15-20psi easily with my setup. Is there any problem turning down the boost (5-7psi) until I get everything sorted out?
    those turbos are way past their efficiency in the map by 15lbs of boost

    ebay ics and gates are fine, i'm runnin a 60mm gate and 50mm blow off on my 325. i put 2 50mm gates and 1 50mm blow off valve on my uncle's 496. wastegates are something its just better to go alil bigger than needed on, it'll make controlling boost easier. go for a pair of 50mm or bigger wastegates, at least a 50mm blow off valve if you plan on doin blow thru. if you're gonna use the system as a draw thru, blowoff valves are a bad idea, ya don't want hot compressed fuel charged boost being blown outta the motor, may hit the headers

    Dare to be different, if it turns out great you can claim you planned it that way.

    Jetboatperformance.com

  10. #8
    Loose Nut on the Wheel michaellone's Avatar
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    Yes this will be a blow-thru system. Looking to Quick Fuel for the carb and Race Pumps for the fuel system.

    I don't understand how to read the maps, what level of boost will are they the most efficient? With my motor, what rpm can I expect to reach that level?

  11. #9
    Highaboosta Unchained's Avatar
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    Before you start down the turbo path be sure you review what your ultimate goal is. There are a lot of the Gale Banks kits around and they seem to do a fair job for around the 800 hp level. If that's good enough for you then fine.

    If once you get a taste of turbo's and you want to put out 1200 hp (and you will) then you will have to start over again. Those 53mm turbos are at their limit already. They become a bottleneck in the exhaust where more boost won't make more power. Even the manifolds are too small to mount a big turbo on.

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
    Quote Originally Posted by MAXIMUS View Post
    I think I could run more boost but it's a real hand full right now

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    What type of boat? Jet, v drive or outdrive, flat, v or something diferent. I have a PFM set up in my 18' flat and it is a Bitch to drive. Just my .02 thanks j.j.

  13. #11
    Loose Nut on the Wheel michaellone's Avatar
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    It's a 81 Hondo Ski Hydro. As far as my long term goals... Pro Mod Drag Boat! Don't know if I will ever get there, but if your going to set goals... set them high.

    I am guessing that I am making 500-550 hp on motor alone. So stepping up to 800 hp will be a decent change. After I get this setup working, I will start working on new bullet and have this as my back-up.

  14. #12
    Senior Member Hass828's Avatar
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    Quote Originally Posted by michaellone View Post
    After doing some reading, I am getting a better understanding on how this setup works. Now I think I know enough to ask intelligent questions.

    The two things I have not been able to find out is wastegates and blow-off valves.

    How do I tell what size I need for my application?

    Are the ones on ebay worth buying or do I need to spend $300+ per valve to get the name brand ones?

    I assume that I need a wastegate mounted right before each turbo and a bov before the turn-down going in to the carb. Is this the correct way to manage my boost?

    Hass828, you said that I should make 15-20psi easily with my setup. Is there any problem turning down the boost (5-7psi) until I get everything sorted out?

    No problem at all, just get a set of 46mm waste gates with the 4lb springs and you'll be able to turn it down just fine.

  15. #13
    Senior Member Hass828's Avatar
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    Quote Originally Posted by IMPATIENT 1 View Post
    those turbos are way past their efficiency in the map by 15lbs of boost
    ebay ics and gates are fine, i'm runnin a 60mm gate and 50mm blow off on my 325. i put 2 50mm gates and 1 50mm blow off valve on my uncle's 496. wastegates are something its just better to go alil bigger than needed on, it'll make controlling boost easier. go for a pair of 50mm or bigger wastegates, at least a 50mm blow off valve if you plan on doin blow thru. if you're gonna use the system as a draw thru, blowoff valves are a bad idea, ya don't want hot compressed fuel charged boost being blown outta the motor, may hit the headers
    What ever you do dont listen to this guy

    Those T04B turbos are right in the middle of the efficiency island on the map at 15-20 psi and WILL work just fine, especially if your going blow through. You should be able to get 800-1000hp with a good intercooler and tune up.
    Like Mark said though, when the day comes to go beyond that(and it will) , then you'll want to go up to a set of T6 large frame turbos and a set of Marks headers, then the sky's the limit on hp.

    Oh yea, on some of those 301E Rayjay turbos that came from banks and pfm, they had a hole drilled though the turbin housing on the exhaust side that was used to limit boost. It was the size of the hole that determined the amount of boost available--the smaller the hole the more boost. So be sure to look'em over to see if they had the holes. Also may be able to get away without waste gates if you can get some info on what size hole to drill(&were) to limit your boost. There's a guy on here that goes by obnoxiuos 1 that used to work for Banks in the hayday of these kits, he should be able to help you out with the info.
    Last edited by Hass828; 11-24-2009 at 07:48 PM.

  16. #14
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by Hass828 View Post
    Oh yea, on some of those 301E Rayjay turbos that came from banks and pfm, they had a hole drilled though the turbin housing on the exhaust side that was used to limit boost. It was the size of the hole that determined the amount of boost available--the smaller the hole the more boost. So be sure to look'em over to see if they had the holes. Also may be able to get away without waste gates if you can get some info on what size hole to drill(&were) to limit your boost. There's a guy on here that goes by obnoxiuos 1 that used to work for Banks in the hayday of these kits, he should be able to help you out with the info.
    Pretty funny,, I was going to comment about the bypass holes,, but down here at the bottom of the thread you have it.

    Look in the bottom of the turbo, through the square flange and there is most likely a hole,, somewhere between 1/4" and 1/2". That was the way they limited boost back in the 70's with those kits. If you want to use waste gates, it is possible to tap the holes for pipe plugs, or if you wanted to reduce the size of the bypass as well,, depending on what you already have.

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