Cold/Ram air box fabrication for my ITB
09-02-09, 05:25 PM
#52
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Nice job on the welding, if you don't use the spacer i'll buy the "paper weight" from you for $50.
09-02-09, 07:30 PM
#53
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i feel your pain! i just got done with putting the stock air cleaner on the weber. not only did it take the longest and most tries of anything on the car (so far), it looks dumb too. AND the fab work is horrible...
09-02-09, 08:05 PM
#54
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well might have a way to kill 2 birds with one stone sort of speak. Make the intake longer by adding a spacer inbetween the upper and lower manifold. That will give me more clearance between the block and the intake, and also give me longer runners which is what I've wanted for a while. It's obviously not going to be much longer but probably like a 1/2" spacer or so.
09-05-09, 06:54 PM
#57
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I'm not to sure where you would find them in America. I just assumed there would other manifolds available in America, as there are other options besides RB manifolds available in Australia.
Here is Mine
Here is Mine
09-06-09, 01:51 AM
#58
who makes those down there? website?
But that looks like about the same length as the Racing beat unit. I believe that racing beat unit might perform better also since the split between the primaries and secondaries are in the upper manifold and to me I would believe that the air velocity would be quicker by the time it reaches the ports since the air has had more time to straighten out.
But that looks like about the same length as the Racing beat unit. I believe that racing beat unit might perform better also since the split between the primaries and secondaries are in the upper manifold and to me I would believe that the air velocity would be quicker by the time it reaches the ports since the air has had more time to straighten out.
09-06-09, 03:23 AM
#59
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who makes those down there? website?
But that looks like about the same length as the Racing beat unit. I believe that racing beat unit might perform better also since the split between the primaries and secondaries are in the upper manifold and to me I would believe that the air velocity would be quicker by the time it reaches the ports since the air has had more time to straighten out.
But that looks like about the same length as the Racing beat unit. I believe that racing beat unit might perform better also since the split between the primaries and secondaries are in the upper manifold and to me I would believe that the air velocity would be quicker by the time it reaches the ports since the air has had more time to straighten out.
The manifold is a fair bit longer. You can see if you compare it with a RB manifold It sits a lot higher off the engine and further across( I can hardly fit an air filter in between the weber and oil pipe. You can see from the pics that there is no way I would be able to fit a filter as long as the one on the RB manifold in that space.
The RB manifold is still great but in terms of Air velocity I still reckon its more restrictive because it has 2 sharp bends (more U shaped) opposed to having a nice flowing long radius bends.
Anyways well done for giving the air box idea a go. I'm really keen to make one for my car too. In terms of design I would like to make something pretty similar. Might buy the one you have if your willing to sell
Last edited by todtanium; 09-06-09 at 03:30 AM.
09-09-09, 08:41 PM
#61
For some technical insight into ram air, here's a link. It's a good read.
http://www.vararam.com/ramairinaroadcar.html
This intake on an engine that Paul Yaw built was good for 22 hp over the previous intake.
http://www.yawpower.com/dec2004.html
Keep in mind that engine with it's gigantic ports were built for race use only. the lack of low to midrange power also forced them to later change the intake manifold back to a STOCK S4 n/a manifold due to it's long runners! Obviously the manifold had some massaging doe to it. The point though is to show that he used a VERY large amount of inlet area to the airbox and picked up alot of power.
http://www.vararam.com/ramairinaroadcar.html
This intake on an engine that Paul Yaw built was good for 22 hp over the previous intake.
http://www.yawpower.com/dec2004.html
Keep in mind that engine with it's gigantic ports were built for race use only. the lack of low to midrange power also forced them to later change the intake manifold back to a STOCK S4 n/a manifold due to it's long runners! Obviously the manifold had some massaging doe to it. The point though is to show that he used a VERY large amount of inlet area to the airbox and picked up alot of power.
I have been researching hood scoops on weber/ carb systems. I'm wondering if all that turbulence over the carb helps or hurts performance? There's not alot of info on this but I see alot of all motor rotaries running hood scoops.
01-27-10, 01:30 PM
#62
Well a few updates:
I decided to make a new one, because the other one I think I made a bit too thin and deformed the metal a bit for the gasket to sit on. But either way this one is already all welded up, and I have also sent it out for electroless nickel plating. Let me know how you like it!
I decided to make a new one, because the other one I think I made a bit too thin and deformed the metal a bit for the gasket to sit on. But either way this one is already all welded up, and I have also sent it out for electroless nickel plating. Let me know how you like it!
01-28-10, 12:16 AM
#65
haven't weighed it, but its not the lightest thing that I could of made. If I make the back plate out of aluminum, which i might, it would take alot of the weight out. But I will most likely be using this to be fed by a supercharger also so I need it to hold some positive pressure hopefully.
03-12-10, 08:01 PM
#68
Just a little update on this, I got the spacer done. I sent out the cad file to get laser cut and its back today. Made it out of 1/2" Aluminum, I might take the intake manifold out completely sometime next week and clean up the casting and maybe port it a bit in some spots. I'll see when I get it apart to see how bad things are on the inside.
03-14-10, 03:39 AM
#72
Not CNC'ed ... just laser cut. I hope that the CNC that I have access to is fixed soon though. It broke on me while I was doing some of my exhaust. I would love to also have one in the garage, I could make a living from that 
.
.
03-26-10, 02:22 PM
#73
Well this sucks, took my intake manifold apart today, and went to try my spacer on there and it doesn't work 
... i called up racing beat and apperently the 13b ones made for 86-92 one take the S4 style inbetween, and the 76-85 style (12a or 13b) take the GSL-SE style.
So I cut up that spacer to the wrong dimentions
... i called up racing beat and apperently the 13b ones made for 86-92 one take the S4 style inbetween, and the 76-85 style (12a or 13b) take the GSL-SE style. So I cut up that spacer to the wrong dimentions
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