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Thread: Making a custom lower intake

  1. #121
    Join Date
    Apr 2002
    Location
    San Bernardino, CA
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    4,520
    whats up Wynn ya gonna mount a 8/71 to a 3.8 i mean everything is bigger in texas.

    I am working on a m112 inverted on a all manny made lower intake all sheet alluminum as soon as I get my welder back I played with her knobs to much and had to send her out to have her knobs done.

    also my die grinder died. so time to get a new one everything is going out at the same time for me damn harbor freight!! lol

    home of disposable tools like the bic lighters of tools.

    but I do now have a splitport 3.8 to do a mockup on got it free 30k on it

    looks like I can make the sc and split ports out of the same basic flange just cut ports in diff places and bolt holes other than that i can use a manifold flange for the split port on both its just taller .

    I should have a mockup done if a few weeks . I dont however see a way to fit a water to air ic in manifold valley.

  2. #122
    Join Date
    Jan 2004
    Location
    Outside KC MO
    Posts
    5,790
    I still think I will do the water to air. If it has to be water cooled, I would plumb it into the intercooler as it sits in the stock location.

    Chris

  3. #123
    Join Date
    Apr 2002
    Location
    San Bernardino, CA
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    4,520
    the problem I had was the 3.8 is small and the ic units i found are all to long or to wide to fit some are tall so I made mine from a heater core works great so far, see my webshots inverted blower. with this ive seen air temps in the ambeint temps on a 104 day with water and small radiator to cool it with ice in tank ive seen manifold air temps in the 40 deg f range.at 15 lbs boost on a 104 deg f day.

  4. #124
    Join Date
    Nov 2005
    Location
    Decatur, Al
    Posts
    21
    The pictures on your links (above) are worth a 1000 words… thanks Manny!
    I'm ready to start fabricating the intake and TB-to-Blower inlet on the inverted blower for my 3.8 Mustang. Because of the split-port heads, I have a slightly different lower intake to create, but I plan on mimicking much of what you have done.

    Did you delete the EGR?
    Does opening up the rear inlet of the blower make a noticeable improvement?
    How’s the heater core holding up? (I’m afraid of leaks and was thinking of making one from scratch out of copper using stronger copper – your thoughts?)

  5. #125
    Join Date
    Nov 2005
    Location
    Decatur, Al
    Posts
    21
    Manny,

    What water pump did you use for your inter cooler?

    Thanks.

  6. #126
    Join Date
    Apr 2002
    Location
    San Bernardino, CA
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    Im not using the inverted setup right now but the heater core worked great its used to 16 lbs of hot water in my application it only see's 15-16 lbs of boost and the water is cold .

    it does see 18-inches vac and 15 lbs boost within a few seconds but it seems to work great my sc does not have egr 92's did not have it .

    the D port has made a big difference I see 11 lbs of boost at 2500 rpms and 14 lbs at 4500 rpms with a ported factory inlet plenum and a 70 mm tb

    on the inverted I saw 15 lbs at 4000 rpms and with my lower pulley I seen 16 lbs but be warned inverted the blower makes boost faster and a tune is in order, i saw lower intake temps of 45 deg using iced water in water to air ic .

    I made the inlet by cutting wedges out of 3" alluminum pipe and welding them together to make turns weld grind clean then do next then next then i ran a dingle berry hone thru it to smooth it all out . lol dingle berry hone

  7. #127
    Join Date
    Nov 2005
    Location
    Decatur, Al
    Posts
    21

    Thumbs up

    This is great information. I studied your pictures pretty closely and saw much of the detail you did. Great job! Why did you switch back from being inverted?

  8. #128
    Join Date
    Apr 2002
    Location
    San Bernardino, CA
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    I had to smog my car so I put stock setup on .

    I used a motor home rotory water pump it has a built in pressure reg but dont need it as water flows freely . I used a can I made that I mounted a tbird air cond under dash rad in and put ice in it and water it cools the water in the radiator down to ice temp . then back to ic unit. then back to tank .

    I tried to make my own ic unit in the picture of lower manifold and ic unit but it had leaking problems .

    the heater core worked best flows air better than the spearco unit I had .

    I also had a small motorcycle radiator with fans on it that is hooked in with a bypass switch so i can run air temp water when not at track.


    ill send you a drawing of how i had it set up.

  9. #129
    Join Date
    Jan 2004
    Location
    Outside KC MO
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    In the pic it showed the front of the IC to be the inlet/outlet. Is that correct? Do you have pix of how you made the bends for the IC?

    Also, have you ever thought about adding material to the deck of the heads? I know it would take about two days to weld up one head but I think that would be beneficial if you only added .08-.5" of material. Of course you would have to increase the intake length, but you appear to have a good Idea on how to do this.

    Chris

  10. #130
    Join Date
    Apr 2002
    Location
    San Bernardino, CA
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    4,520
    yes inlet and out let are in front I used 1 inch rubber hose to connect and 3/4 inch pipe to route water I bended it in a tubing bender from harbor freight a $5 ITEM

  11. #131
    Join Date
    Jan 2004
    Location
    Outside KC MO
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    5,790
    Manny, YOU sir are an ANIMAL.

    Chris

  12. #132
    Join Date
    Nov 2005
    Location
    Decatur, Al
    Posts
    21
    Started milling the split-port lower intake this past weekend.
    This picture shows it's progress and intended plan for the intercooler box to be welded on top.
    Attached Images Attached Images  

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