My Intake manifold.

admin

This is some pictures of my intake manifold I am building. I did not weld it since I  don't have a TIG welder. So a local shop is welding it. EnjoyNOTE: The injector bungs will be angled down more.
Reply:Nice intake! Your cylinder head needs a little work tho Fire!, Fire! Oh wait, that's my torch...Lincoln PT-225 TIGLincoln 175 MIG
Reply:Hahaha What are you talking about! It's perfectly fine to have sludge build up, rusty cam lobes, 8 missing springs and no cam gears. Thing will run smooth!  Thanks!
Reply:Why are the injector bungs so far away from the port?  Aren't you afraid the gas will puddle up?  I would think it will being so far away.
Reply:I was going to say the same thing.  I don't know what kind of injector your using, but wherever it ends up it should be close to the airflow for optimum mixing.  Also, this type of plenum is better suited for charging than normally aspirated.  Are you  planning on using a turbo?  The fab work looks good.Last edited by Rick Moran; 10-10-2007 at 10:15 PM.Hobart 140 Handler w/ gasHyperTherm Powermax 380 Plasmaoxy/acetylene
Reply:Is that a Toyota head?I'm thinking a 4AGE or 3SGEDon't talk about it, Just do it!
Reply:I have to ask this.  How much pressure would be put on the tubes.  The reason I ask is due to the fact the welds are bad.  When welding Alum.  Having that many fish eyes, is going to cause a failure.  weather it cracks or they turn into pinholes letting air and or pressure in/out.  If this is being used for power, you will lose it.  Sorry, but I saw this last night and sleep on it.  I did not want to be the bearer of bad news.  But since no one has stated this I thought I would.  I would ask the guy who did this job put another pass and correct the problem.  Hopefully someone else see's this as a problem.  Again sorry to be the " colon " who brings this up.
Reply:The airbox looks really neat! Pretty good welds, considering all the turning around all the parts on it. If I could ask, other than volume, why use a square box? As far as airflow is concerned, the airbox is not a design that will yield the best flow. And that's the name of the game... flow first and foremost. A well built airbox can be smaller and get better airflow than a larger, more cumbersome box. And as for injector location, I have no idea what the original intake used, so I can't say. But.... if the injectors are set higher than previously, you will run a real chance of washing the injector tubes, rather than misting the air charge. You may need injectors that have a narrower flow pattern at higher pressure to get the spray pattern correct. And, if possible, maybe a venturi in the intake runners to speed the center of the airflow to move the fuel vapor through more efficiently. Intake tuning was a nightmare on our superbikes; we could try 3 different ram air intakes, different injectors, fuel pressure, spray pattern, and dyno this stuff for days. Then, seat of the pants testing on the track. I have seen a LOT of intakes. Yours looks very nice, so I wish you luck. But it looks like there are lots of areas for dead air to sit stagnant; not so good for making power. Paul.And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.
Reply:I would have used a round or D plenum rather than box but looks good otherwise.  Agreed the injector bungs need to be shorter and have more angle.
Reply:Its obviously going to be boosted. And those welds are just fine.  You should see the 10 second cummins twin turbo that runs 65 PSI on the first charger and upto 100 PSI on the second.  There are more engine leaks than anything. Almost 1.5 quarts per pass. The plenum  shows NO signs of leakage and the welds aren't nearly as nice as these.   I am sure there is a better design and welding available but for what cost and how much more of a gain. The injector bungs will be fine at their  location if the boost is anything more than 7psi. The intake velocity will take care of any atomization issues at boost.  I would assume the turbo will be mounted where the bolt holes for the manifold are on the end.  Nice job.........500 AMP AIRCO TIG LINCOLN PT185 100% DC @ 128 AMP-WTFSPEED GLASS 9002X MILLER THUNDERBOLT 225HOBBIEST TURNED WELDING JUNKIE8 2ND FIRECAT - SNOWMOBILE RACE CHASSIS FABRICATORPRIDE IS WHAT MAKES YOUR WORK SO GOOD
Reply:tell the weldor to fill in the craters.  other than that, the welds look good.
Reply:okay.. i'm sorry to change the subject, but i can't take it any longer... what is this thing going onto? it's obviously an turbod, inline 4, but is it a celica or what?i am just really curious.later,Andy
Reply:Why would you say " obviously the turbo is being mounted on the intake" ?  If it is, the intake will crack for sure.  No way is it strong enough to support it.  I hope it is turbo'd, just make sure it is right the first time, too much work would be wasted if it is not.
Reply:It is already Turbo charged with 23psi of boost (as of now). The Shape of the plenum will not matter much due to the fact that the engine is turbo charged. I doubt the welds will leak.The engine is and Isuzu 1.6 liter engine in and AWD IMPULSE . Like I stated in the NOTE: area. The injector bungs are not in the position as desired. We are cutting the bungs in half and welding them closer to the head and at a different angle.
Reply:i jsut looked at the stock engine bay of a factory turbo AWD but didn't notice anything that woudl bolt into the 4 bolts on the end of the plenum. what are they for? from hearing that you run 23 PSI of boost, i woudl venture to guess that you are not running a stock set-up. what else do you have done to it? just curious.later,Andy
Reply:Originally Posted by aczelleri jsut looked at the stock engine bay of a factory turbo AWD but didn't notice anything that woudl bolt into the 4 bolts on the end of the plenum. what are they for? from hearing that you run 23 PSI of boost, i woudl venture to guess that you are not running a stock set-up. what else do you have done to it? just curious.later,Andy
Reply:Nice amount on HP´s you´ll get...now, do you have pics of your car? Where do you race it? any kind of rally?My Babies: HF Drill pressHF Pipe Bender3   4.5" Black and Decker angle grindersLincoln Electric PROMIG 175that´s it!
Reply:I have only ran it at the Drag strip (Moroso) once. It usually gets street driven (when it runs) once a week. I was thinking about doing rallycross with it then maybe do some rally racing if I do well. It is setup for drag racing right now. I will have to do suspension work before I rally.first 2 pics are the day I bought it. 3rd is the first upgraded turbo.