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Engine Specific Info and Questions => IDI Engine => Topic started by: theman53 on March 30, 2008, 12:29:27 pm
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I finally have made an intake for the flat red bunny
I will try to post the pictures as I was overly proud of my building this...it was very easy, but I wanted to share. It might be helpful to someone here though most of you are WAY more advanced than this or me in general.
P.S. in the one pic you might get to see the awesome 1/0 battery cables it is the red wire that is bigger than the line comming off of the vacuum pump :twisted:
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I am going to go out now and add some old window screen in front of the pipe just behind the grill to help catch the bigger stuff.
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would be better with less bend...
post your results :wink:
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i wonder if you can heat up that tubing and bend it a little... :wink:
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didn't think of bending it. That is 3" schedule 30 pvc so I should have good flow and I couldn't go bigger as my hood is just able to shut. To help increase the flow which I don't know if you can tell from the pics that I ported the inside of the pvc. I didn't want that much bend, but I didn't want it over the IP throttle etc. plus my bracket to hold it up felt really secure there.
I figured someone might ask what did I use to seal the pipe in the airbox. Since no one did I'll tell anyway, it is a rigid polyurathane. It is almost exactly the same stuff as the Great Stuff foam in a can, but instead of expanding with a blowing agent this is solid. Mine isn't so solid as I got it from work because it has moisture in it and when that happens it starts to bubble like the foam.
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Andrew I believe you may be right. I can always change that. On a side note I was able to turn up the fuel screw another 1/4 turn. I just test drove it and no smoke no matter what kind of situation. So I just turned it up again and now a little bit of smoke. I am not going anymore on the screw as I don't have an EGT gauge. But it is now 1/2 to 5/8 of a turn over stock.
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Nice work! Looks good!
Let us know if you feel any difference while driving.
I think it would look good if you painted the joint and PVC with black spray paint!
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I might paint it flat black to match the rims :) . The differences I notice are that I could turn up the fuel and the throttle in the car feels easier to push. I don't know why it felt that way. Didn't matter when I turned the pump up more still feels soft. I didn't touch anything else.
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Its your turn to do the dishes! :)
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:lol: My wife said after she saw the pics WHY did you take a picture with the dirty dishes in the background. I didn't even notice nor did I think anyone else would. :D
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I didn't even notice nor did I think anyone else would. Very Happy
who notices the background? i think your intake is
(http://smellslikefries.com/vwpics/posts/sweet.jpg)
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that's pretty sweet. Is the car any louder?
You aren't concerned about driving in the rain and getting the air filter soaking wet?
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regarding rain you can hack off 3" from the front and keep a 90 degree elbow in the car... any doubts that it will start drizzling seriously all you have to do is snap it on the end of the pipe and aim it sideways or downwards
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That is nice, if I wasn't so lazy I would copy it :lol:
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I wasn't concerned about the rain getting in as much as the bugs this summer. I also didn't think it would be any worse than the stock as you can see in the pics all of the mud water splashed up in the inner fender. I still haven't fitted the old window screen in the grill...I am kicking around the idea of pantyhose or an actual outerwares prefilter for a sprint car K&N stack would fit well but cost money... I am cheap :D . Either one would definately cut the moisture down.
I did buy another 45 elbow and rubber sleeve to help give it more of a direct shot, but it isn't in yet.
The car inside isn't "louder" but it is different. Now the engine is whisper quiet, but you can sometimes hear the intake and now the exhaust could be little louder, but it is a different pitch...overall I would say it is the same or quieter in dB but more pleasurable to the driver :D outside the car you can definately hear it sucking :o even at idle.
I have driven it 150 miles or so now as I am a salesman and drive alot and would say this about the mod SO FAR
PROS: Sounds better inside the car, Butt Dyno says that the mid to upper RPM pull is noticably better- if it were a gas car it is almost like adding a higher lift cam :twisted:
CONS: Took the better part of an afternoon, scary cutting the crap out of your intake box and not knowing what will happen for sure, and not any benefit on the low RPM maybe a tick worse or just the mid to upper is so much better it seems that way.
I would DEFINATELY recommend doing this
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u could put a baffle over the front so that air doesn't go directly in along with water, i doubt the ram air effect does much, but who knows
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I drove another 100 plus miles today and noticed another couple of things
1. It rained and no real moisture contamination in the filter area- I don't know if it sucks so hard it dries it or what, but the pvc on the inside didn't look dirty or splashed like I figured it would
2. The RPM's hang for awhile. I used to push the clutch in and the car would drop almost immeadiately to idle, now it will come down nice and slow...the faster in MPH the slower the RPMs fall. Maybe the ram air effect??? I think it helps in the upshifting on hills :D
I still recommed doing this. I can't wait to get my gasket set and do the gov mod. I think it will help even more :twisted:
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The rpm hangs because you turned the fuel screw in. You only get some much adjustment just turning the screw before the rpms hang.
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you can set the residual screw so the rpm's don't hang.
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I turned it back down today, but it still hangs. Not like a hang as much as it just comes down noticably slower than before. It doesn't smoke at all now.
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Which screw is considered the residual fuel screw?
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not the idle screw-top left if looking from timing belt
not the wot screw-top right if looking from timing belt
the one on top right in the middle---very touchy
at least that is the way it was discribed to me.
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So is it the one i consider the max fuel screw? Its in the top cover right?
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Bro! Is that Rusty the paint guy from PBS??? That is some funny *** :lol:
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His name was Bob Ross definately from PBS. The dude ruled. I remember him from when I was a kid painting his "happy little trees...get out the fan brush and some yellow ochre and add some highlights to your happy little landscape" And he has probably the best afro of a real person I can think of. :lol: There is a guy from the cleaveland cavs that is close and maybe sideshow bob off of the simpsons cartoon :lol:
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i heard he died is that true? From aids? Either way that guy was hilarious. Real easy talker laid back. The happy little tree next to his friendly little stream.
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Residual fuel screw is the top left one when looking at the pump from the belt side, max fuel is in the middle, with the larger locknut. Idle is on the engine side of the pump, a long screw going down to the bottom of the pump.
Foxracer1
Which screw is considered the residual fuel screw?
theman53
not the idle screw-top left if looking from timing belt
not the wot screw-top right if looking from timing belt
the one on top right in the middle---very touchy
at least that is the way it was discribed to me.
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Sticky levers on top of the pump can cause the RPMs to drop slowly.
Spray the springs with lube and see if they move smoother.
Another thing that can cause the RPMs to drop slowly is injectors that are spraying funny.
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The RPM thing I think is a bonus good thing. It doesn't hang I guess as I described earlier, but the RPM's don't fall as rapidly as before. Before maybe back to idle in milliseconds now maybe tenths of a second??? Just enough to be noticed. The best way I could describe it in a similar situation was when my friend put an aftermarket pipe on his 2 stroke quad. The stock pipe his engine would lose RPM's slowly the aftermarket pipe they would stay up longer. It was nice when shifting his quad and similarly the Rabbit I have. It also revs faster than before. I got real interested in this mod when I reved my engine with the arm on the pump and was watching the airbox...it looked almost like the airbox was sucking down, like it wasn't getting enought air. I looked again and saw the size of the filter and then the size of the stock hole at the end of the intake tube. I remembered seeing some stuff in the FAQ section on how to make your 1.6na faster and thought this is the way to go. Tomorrow I will be putting in the 45 degree in place of the 90 but other than that it will stay as is an I LOVE IT!!!
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definitely a good mod, the tiny hole is made to make the engine quieter, not to make more power or mileage.
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about the moisture; i dont think it will hurt. no water droplets can get through the filter, unless you went through a deep puddle and you sucked in a lot of water. i suppose the main issue would be condensation building up inside when let sit for a while, but isn't any setup prone to that???
i had a cpu cooler setup once with a thermoelectric cooler... it would always develop ice on it, so couldn't put that on my cpu... added a fan for airflow and it never accumulated. worked like a charm but took too much electricity for such a small gain in performance. so the same applies to your situation. the high flow of air is going to restrict the condensation.
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I went over to my friend's house this weekend and helped him with his ford. It has a 460ci in his truck :twisted: but the thing that I noticed was that it had probably 3" rubber hoses going from the filter box to the injection manifold. After screwing in a light bulb :idea: I thought "I could have used some of those from a bone yard 460 engine in my intake setup instead of all of that PVC. I probably wouldn't have noticed if I hadn't just done it though....maybe you all could learn from that. I bet all you would need is 2 45 street elbows and the hoses from a MPI 460. I am kicking myself as it wouldn't have taken half as long to do :lol:
not to make this the neverending thread, but I will post pics later of the new 45 elbow that replaced the 90.
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(http://a349.ac-images.myspacecdn.com/images01/11/l_9c1d854984f3564512bce9fe5d1c5fd4.jpg)
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BTW I didn't have it screwed together today and it came apart...when it did I knew it immediately. The Ram Air effect means TONS. It came apart at the 45 right in front of the IP so you wouldn't think that it would have been getting hot air. I hooked it up and huge difference again. If you're thinking about doing this go ahead, best mod I have done for the NA 1.6L.
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i heard he died is that true? From aids? Either way that guy was hilarious. Real easy talker laid back. The happy little tree next to his friendly little stream.
You made me wonder so I went and looked it up -
http://query.nytimes.com/gst/fullpage.html?res=990CEFD7143BF930A25754C0A963958260
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The ram air thing really does help at highway speed (50-60). I blocked off the down duct (under the rear intake grille) to turn my rear air scoop into a ram air intake on the left side of my Vanagon. Straight in no wind, it helps. crosswind from the right, slower. crosswind from the left, noticeably faster!
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what about a snorkel device? Could this perhaps increase intake? Can a diesel ever get too much air?
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Thanks for posting again on this. I was going to but didn't want to take up the room on the forum all by myself. Anyhow I probably couldn't go back to the way it used to be. It IS QUIETER and the freeway speeds are now attainable easily. I went to a K&N filter but other than that nothing changed since the last post. I probably have put 1,500 miles or more on it, and I am getting 3-4 MPG more with it over the old box. My brother called me and he could hear me when I was going 72MPH down the road and not only hear me but he said he didn't even know I was driving. His exact words were "youre driving? Your Volkswagen? I can't even hear anything but wind." My window seals leak real bad so that is what he heard. After the mileage that I have driven I now see no negatives.
You should try this:D
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better airflow is always better.
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Continued good results? I'm thinking of maybe picking up a 1.6na
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LUCAS! Omfg bromosexual. this looks amazing! I am going to try this for sure! I'll try and locate a wrecked 460 first :P
sweeeet man.
"edit" ps. I love 2 year old thread bumps lol :P
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Yeah I have since sold that fly hoopty*don't even know if that is correct slang* LOL
That intake was flipping sweet. All the noise was up in front by the rad. In the car was nice and quiet, except for the 2.5 or 2.25 exhaust from the bowl back, with a cherry bomb. It was almost like a turbo with the ram air effect. I would say like driving with 4 lbs boost or so.
Since I am cheap it was also cool as I had less than 20 dollars in it.
Yes, the 2 year old thread bump and it is still relavent :D
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i heard he died is that true? From aids? Either way that guy was hilarious. Real easy talker laid back. The happy little tree next to his friendly little stream.
He died of lymphoma in '95. His voice makes me sleepy. I used to love watching him and then subsequently napping on summer afternoons.