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03-16-2011
If I were doing a FWI like yourse, I would use:
Throttlebody > 3" to 4" adapter > 4" bend> 4" to 3" adapter > MAF > 3" to 4" adapter > 4" straight pipe > 4" adapter > 4" bend > 4"-opening filter
Optimally all bends should be 4". A 4" 90* bend has roughly the same properties as 3" straight pipe. Obviously, the ~22.5* bend off the throttlebody and the 45* (is that 45*?) bend at the filter only equal 67.5* total bend, but there's no reason to do anything but 4".
Last edited by SlowNA06; 03-16-2011 at 02:06 PM.
03-16-2011
sounds good to me... back to you bob...thanks tom lol
03-16-2011
As for the 4" pipe, its all about volume. The larger intake pipe essentially acts as like a surge tank. With 3" its just keeping up, with 4" there is excess air there to keep the flow at max.
03-16-2011
nicely said
03-16-2011
I was 2 paragraphs into saying that when I scrolled down I saw you already said it much more simplyOriginally Posted by stealthee
03-16-2011
so...i tried something today. i used my buddies g-tech pro and did some runs with my FWI. i got a pretty accurate 14.51. i did this three times and got a 14.5 on all three. i took intake apart and bolted the filter back to the MAF just to see what might be happening. 3 runs on the g-tech i got 3 14.1 runs. i went home and started looking at all my pieces. it turns out that the 90 degree bend in this picture is 3 inches on each end and actually only 2.25 inches in diameter in the center. i guess i should have noticed that in the 1st place. time for more research.
03-17-2011
Are you talking AFR? Are you saying that your FWI was leaner with the bend on it?
03-17-2011
That's why I am extremely prejudice toward hardware store intakes. I noticed this when deciding on my short ram intake.
As a side note, when making a short ram people should buy proper tubing here: Global Technology and Engineering
03-17-2011
dont know what afr is. i know that the bend had an inside diameter of 2.25 inches.
03-17-2011
The numbers 14.5 and 14.1: Are these your Air-Fuel Ratio (AFR)?
03-17-2011
i think those are calculated 1/4 mile times via his g-force gauge.
03-17-2011
Ohhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh. I feel silly now.
03-17-2011
Lol yep 1/4 miles times
03-17-2011
Air to Water Intercooler
piping yo.
http://www.frozenboost.com/product_i...7881719f43ac69
You take. you cut.
order their silcicone adaptors for teh maf and TB and you win.
03-17-2011
so...i tried something today. i used my buddies g-tech pro and did some runs with my FWI. i got a pretty accurate 14.51. i did this three times and got a 14.5 on all three. i took intake apart and bolted the filter back to the MAF just to see what might be happening. 3 runs on the g-tech i got 3 14.1 runs. i went home and started looking at all my pieces. it turns out that the 90 degree bend in this picture is 3 inches on each end and actually only 2.25 inches in diameter in the center. i guess i should have noticed that in the 1st place. time for more research.
You need a better filter than that cheap Ebay one too. I hate sounding like a sales rep, but check out Green Filter USA. You can get a cone in almost any size you want. It outflows K&N by a ridiculous amount because of a slight design difference too.
03-17-2011
not an ebay. its a spectre. ill check em out though.
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