Quote:
Originally Posted by ssmike
Wouldn't the thickness of the maf section inside the tube disrupt airflow along the edge of the silicone tube when it hits that different diameter edge? Seems to me that the surface inside the tube should be without any obstruction or abrupt diameter change. Just throwing that out there, I don't know airflow dynamics.
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In theory, you are correct. However, there isn't an abrupt edge per say from the MAF mount part inside of the silicone tube. It has a pretty nice 1" radius entry. If you look at a Halltech Yellowjacket, it also necks down right around the MAF area. I can only assume this is to correct the readings, but this is just a guess...
I had originally come up with a silicone maf mount that would go outside of the tube, however after thinking about it for quite some time, I realized that on hard acceleration, when the engine moves it could very possible pull on and distort the area the MAF was mounted to, throw off readings etc... Also, when the problem with MAF readings with the last prototype revision arose and I decided to move the MAF into the tube, the problem was the silicone intake tube was a TRUE 4" ID, not like most of the metal tube intakes that it a 4" OD (16 ga wall thickness, 3.87 actual ID)... So just throwing the MAF on the outside of the probably wouldn't help with out a tube, even if the tube was rigid. That's how the magical MAF mount inside the tube came to be. It's 6" long so that ensures that for at least those 6" that the MAF supposedly needs to read correctly, it's solid and won't flex...
Mike, your post also got me thinking, If a guy planned on tuning the car for the intake, I could do the same thing on the outside of the tube, a solid 6" plastic piece that attaches outside the silicone tube would still keep that section of the tube that the MAF needs to read properly without having to neck it down for the stock tune, and have a true 4" ID straight through intake tube for a "Tune Version"...
There were many ways to accomplish what I've done, but this just seemed the most economical. The wheels are still turning, and I'm not done yet.
Quote:
Originally Posted by Firefighter
Sweet! So how's it running so far? Good idle, etc.?
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Seems fine to me, but so did the last attempt that I sent out for independent testing
Idles fine. Like normal. No check engine lights.
Quote:
Originally Posted by 429
Keep in mind when you produce these, not to advertise them for any kind of supercharged setups. A blower will easily collapse the silicone, and thats a recipe for disaster. N/A you'll have no issues, I like the heat insulated silicone design from that aspect.
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I have asked the company making the intake tubes, and in theory, at such a time when I can make the jump to FI, the tubes can be wire reinforced to prevent them from collapsing. Currently they are 5 ply, polyester reinforced.
Quote:
Originally Posted by Fish-man
Nice!
Do you have a running log of track times? Along with notes on when you did exhaust mods?
stock= 13.xxx
ptype1=...
ptype2=12.535 (or is this ptyp3?)
And, just for guesses... any idea of how much the times improve due to engine getting 'loose' over time/mileage? I do not know what may be typical there
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I have a stack of time slips, and I know what was done when... The previous fast time listed in my sig was with intake prototype rev. 2 w/ stock cats and throttle body... The only changes between my previous fast time of 12.85 @ 110.45 are: A set of high flow cats built in house, a Bo White ported throttle body, and I'm now on intake prototype Rev. 3.
Quote:
Originally Posted by 429
Sure isn't. The only solid part in the intake is the maf housing.
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The airbox/heat shield is made of aluminum, and the lid is poly-carbonate.
Quote:
Originally Posted by IndeedSS1
I think the placement of that MAF housing will help make the entire tube more rigid. That aside, the percentage of FI cars is very small compared to NA. If you are going to spend your time and money bringing a product to market you have to target the masses.  |
Indeed, Indeed! Start with what sells... If I can successfully get this off the ground, I can move on to FI cars, later as well as the v6 cars and beyond.