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proxlamus©

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Posts posted by proxlamus©

    Welding Class - Final Project - L Intake Manifold

    in Fabrication / Welding

    Posted

    I already welded the runners to the flange.

    I am going to weld in the velocity stacks in a few hours to my 4" plenum.

     

     

    I found an awesome 2" I.D. 180 degree fuel filler hose for $15 a piece at CarQuest!! So I can either utilize 6 - 180 bends or I can cut each piece in half and make 2 - 90 bends out of each one.

     

    MUCH cheaper then the $35 a piece silicone or aluminum u-bend.

     

    Cheapest option I found was $7 ...90 degree elbows in aluminum from Global Tech Engineering recommended from Austin.. I would buy those then a silicone coupler which is about the same price as the full u-bend itself!

     

    yes fuel filler hose is UGLY... i would prefer aluminum. but damn this manifold is getting pricey lol.

     

    $156 for 2 sets of throttle bodies shipped

    $80 for the aluminum sheet, 4" aluminum pipe, 1.625" runners

    $135 for the intake flange shipped

    $116 for the aluminum velocity stacks shipped

     

    Soo total is $487.. which is a bit pricey (im thinking lonewolf's intake now lol) .. and then I need possibly an additional $100 in rubber couplers/bends.

     

    Still cheaper then having a shop weld up one.. or buying other ITB setups.. and I have my own plenum for the turbo and experience gained!

    Welding Class - Final Project - L Intake Manifold

    in Fabrication / Welding

    Posted

    Ok.. im trying to figure out the best way to use 180 degree curved runners..

     

    I am debating between silicone and aluminum..

     

    a 180 degree bent 2" o.d. aluminum pipe is $35 a pop! and I need 6 of them! ugh! http://www.fortune3.com/Slomo/180_Degree_Bends-Vibrant_2_O_D_Aluminum_U_Bend_Polished_1.html

     

    another option is a 180 degree silicone elbow which is also around $35 ..

     

    Soo thats another $200 for this project and this design! UGH!

     

    Any other suggestions?!

    Welding Class - Final Project - L Intake Manifold

    in Fabrication / Welding

    Posted

    well im an idiot.. and I made the runners too long. and because I cut the pipes at angles.. if I cut them any shorter.. my spacing will be wayyy off.

     

    Soo for my plenum.. I have a 4" wide base.. and a 4" diameter pipe.. I cut the pipe in half.. so its a D shape plenum.

     

    But thats 2" in height..

     

    Is this plenum too small?! im reallly worried about the volume.

     

    I calculated the following.. volume = 3.14 x R (squared) x h

     

    Soo.. a 4" pipe.. has a 2" radius.. which is around 301.59 cubic inches at 2 feet long.

    Cut that in half because I cut the pipe in half is 150 cubic inches!!

     

    the stock setup.. is a 2.5"x2.5" style plenum.. soo after the thickness of the wall.. i would say 2.25" by 2.25".

    Volume = L x W x H

     

    The stock intake at lets say 2' feet long.. is 121 cubic inches!!

     

    Soo my plenum has 30 cubic inches more volume then stock?! ahh ♥♥♥♥ is this too small?!

    GOOSE HORN coming from the engine.. WTF

    in Trouble Shooting / General Engine

    Posted

    Problem solved.. bad intake/exhaust gasket...

     

    The aluminum intake and cast iron exhaust manifold heated differently.. some of my bolts were loose.. once the car hit operating temp.. the gasket vibrated and whistled or goose coughed LoL

     

    Anyway.. all fixed. The car actually ran better with a vacuum leak believe it or not.. or maybe it just sounded loud.. which gave a false sense.

     

     

    Thanks guys!!

    Welding Class - Final Project - L Intake Manifold

    in Fabrication / Welding

    Posted

    Ok I recalculated..

     

    from the center of the intake valve.. to the throttle boddy.. is 11.2" inches.

     

    With my ID (remeasured its 1.4" not 1.375) and my length.. I will hit the 5th intake pulse, with a peak torque of 5350 RPM!

     

    Hmm.. works out perfect since the L series runs out of breath at 5,000 RPM...

    so hopefully this manifold will increase the airflow and extend the power range =)

     

    I wont be cutting the runners at this time.. how about a second opinion?!

    Welding Class - Final Project - L Intake Manifold

    in Fabrication / Welding

    Posted

    After using a handy dandy calculator.. I determined that with my camshaft.. w a 260 duration.. and the ID of 1.375".. and a desired peak torque at 5,000 RPM.. The runner should be about 6.39" long. This length will allow the intake waves to hit their 9th pulse. To choose every 8th pulse.. the pipe should be 7.275" long.

     

    Nascar uses the 3rd intake pulse.. If I wanted to use the 3rd pulse.. I would be looking at a length of around 20" inches!!

     

    this is the link to the calculator!

    http://www.velocity-of-sound.com/velocity_of_sound/calculator3.htm

     

     

    The pics are from my mock up stage. I believe the runners are 6.5" long right now. I measured 16" inches from Cyl 1 to the strut tower. and 14" from Cyl 6 to the heat shield. My pressure plenum will be interesting to build lol. I only need to weld up Cyl. 3 and Cyl 4 now.. then the manifold will be complete. then turbo time!

    12 injector setup, how do i plumb it?

    in Fuel Delivery

    Posted

    Olie how you doing on your ITB setup?!

     

    How were you planning on attaching the runners to the throttle bodies?! I was going to use a silicone coupler.. dont have enough time to weld up a flange and o-ring it.

     

    I wanted to run supplemental injectors.. but due to my spacing.. the stock GSXR throttle body fuel rail wont fit.. so i would need to machine a new one.

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