Turbo or Supercharge?
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Turbo or Supercharge?

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    Default Turbo or Supercharge?

    I am very new to performance engines but I have a great time learning on this forum.

    It seems like turbos are the new thing....is a twin turbo setup better than supercharging? I have only seen the turbos in smaller v-drive boats...is anyone running turbos in a 26ft + DCB for example? Why don't you see that?

    Thank you

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    Senior Member steveo143's Avatar
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    I built my first twin turbo boat in 1978. Blowers take horsepower to make hp. Turbos are free hp.
    steveo143 AKA DiMarco 21 II



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    Only downside is you HAVE to use watercooled housings under a hatch, and they aren't real common, or cheap...

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    senior member turbo wog's Avatar
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    Quote Originally Posted by dnewps View Post
    I am very new to performance engines but I have a great time learning on this forum.

    It seems like turbos are the new thing....is a twin turbo setup better than supercharging? I have only seen the turbos in smaller v-drive boats...is anyone running turbos in a 26ft + DCB for example? Why don't you see that?

    Thank you
    if believe that at 8 lbs of boost you gain 75hp out of the turbos over a blower. at 15 lbs of boost you gain 150hp & 23 lbs of boost you gain 225 more horse power over a blower & turbos are 100% guaranteed not to blow a belt thats what i heard . on my ford lightning truck i put a whipple supercharger on it & they said if i went twin turbo it would be a 200 hp gain. i didn't have time for the fabrication. it was work season

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    If I wanted to build a 900hp twin turbo for a sterndrive 26ft cat....what block and CI would work best for cost and long term reliability....could this be turn key? Are turbos easier on drives than superchargers?

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    Highaboosta Unchained's Avatar
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    Turbos are the best way to go IMO but if it has to be under a cover then the heat issues are overwhelming.
    Water jacketing everything is extremely costly and removes some of the heat that run the turbos. You will be limited on what turbo you could get with a water jacketed turbine housing. I've never seen a water jacketed turbine housing with a T6 flange.
    Guys I know who hooked a big turbo motor to an outdrive broke the drive repeatedly.

    I would look at a big Procharger setup.
    They work great with a remote intercooler.

    Twin Turbo 1800 HP V-Drive lake boat

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    I think I could run more boost but it's a real hand full right now

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    Senior Member VDRIVERACING's Avatar
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    The turbos are very efficient and make tons of power. Roots blowers are easy to install, widely available, do not create plumbing and heat issues.

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    Quote Originally Posted by VDRIVERACING View Post
    The turbos are very efficient and make tons of power. Roots blowers are easy to install, widely available, do not create plumbing and external heat issues.
    Fixed it for you...

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    Senior Member ap67et10's Avatar
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    Quote Originally Posted by Unchained View Post
    Turbos are the best way to go IMO but if it has to be under a cover then the heat issues are overwhelming.
    Water jacketing everything is extremely costly and removes some of the heat that run the turbos. You will be limited on what turbo you could get with a water jacketed turbine housing. I've never seen a water jacketed turbine housing with a T6 flange.
    Guys I know who hooked a big turbo motor to an outdrive broke the drive repeatedly.

    I would look at a big Procharger setup.
    They work great with a remote intercooler.
    X2
    the big F3 prochargers are pretty easily going into the mid 1000s for hp...all depending on how big of cubes and how much boost. even some are going into the 2000 hp range. check out the steve morris racing engine site http://www.smreperformance.com/

    AP

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    Senior Member TwinTurbo540's Avatar
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    Quote Originally Posted by ap67et10 View Post
    X2
    the big F3 prochargers are pretty easily going into the mid 1000s for hp...all depending on how big of cubes and how much boost. even some are going into the 2000 hp range. check out the steve morris racing engine site http://www.smreperformance.com/

    AP
    You need to make atleast 750 hp N/A to be running an F3 or it is just not worth it! An F2 will make you 1600 no problem and if you did have the engine for it an F3 will get you 2500+....

    The people at SMRE performance (kim and cj) have been very good to me!! Steve Morris is no longer a part SMRE though.....

    Travis

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    Senior Member pwerwagn's Avatar
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    A few guys here in albuquerque run Turbo motors, one in an HTM and one in a DCB. They have problems due to heat all the time, as well as drive issues.

    When they run, they run good though.
    1985 Fineline Centurion tunnel, 1988 200hp merc, "Still Halfast"
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    can you turbo an engine with 10:1 compression. I understand that the higher the static compression the greater risk of detonation....I just don't know the details or how musch is too much compression. Can someon give me an explanation. Thank you

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    Junior Member ImOnaBoat's Avatar
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    you can run high compression with FI, i know of a place back east that runs little 2 liter engines on 11:1 compression and around 30lbs of boost and make near 1000hp with race gas and water/meth. it will give you very little room for error for detonation unless you are really experienced with tuning and you will most likely have to do this on race gas or water/meth injection or both if your running high boost just for good measure, it will give you alot of gain though not to mention the better response and power you will have off of boost. which is why i like turbos over superchargers you can cruise and idle on a tame motor but really get crazy when it starts to load the turbos.

    as far as heat goes, with turbos you can wrap the manifold in heat wrap and it will make your engine bay temps lower.

    but i would choose a turbo over a super any day from my experiences

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    lets say we are talking a NA motor with FI and 10:1 compression putting out 700hp on 91 octane and I wanted to go to 900hp SAFELY! on 91 octane. how much boost would be needed....how do you calculate that? I am thinking of something that can cruise mostly out of boost but have the boost for the top end? Is this a good idea or is a lower compression engine better?

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