This guy seems to know what he is doing with manifolds...

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Gareth
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This guy seems to know what he is doing with manifolds...

Post by Gareth »

http://youtu.be/27Ue2_tkHR8

Good to see ideas backed up on a flowbench...
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The1
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Re: This guy seems to know what he is doing with manifolds..

Post by The1 »

he can tig to, but for me, he has lots of time and money or someone else's. lol

I had been thinking of doing a flowbench for a mate, was going to see if i could code for multiple maf's and maps or something.
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Gareth
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Re: This guy seems to know what he is doing with manifolds..

Post by Gareth »

Thr flow bench in that video seems simple enough, would it be that hard to get one together with like you say a bunch of mafs?....
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The1
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Re: This guy seems to know what he is doing with manifolds..

Post by The1 »

yeh those fluke vane meters are nice, but $400 each.

Looking at the 68hc11 there isn't enough inputs to use frequency based mafs, though if you used 0-5v maf's you could use existing A/D inputs then just change the ADX to suit the read out. Say on VT V6 N/A PCM you could use

TPS
left o2 sensor
right o2 sensor
egr
spare a5 pin
Intake air temp

there's 6x 0-255 inputs already you could use more if you wanted 8 and should function without any code changes, PCM wont be happy and have a gut full of DTC's but it should still datalog and show you the readings, would just need PCM powered up with VATS off, you can just read the raw 0-255 0-5volt on the datalog or find out the calc and put in the adx, Most of the work is in the RIG and piping and a couple of old vacuum cleaner motors to push air through. I think delcowizzid did this kind of setup a while ago but with just 1 MAF 1 MAP
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The1
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Re: This guy seems to know what he is doing with manifolds..

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i like his thinking with the injectors to, the ecotecs are just spraying straight onto the walls and relying on air to pickup the whole spray and take it with it, the L67 is better in this regard with spraying direct in the head.
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Re: This guy seems to know what he is doing with manifolds..

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its at the valve actually with some of the spray cone getting the walls., L67 is more direct though.
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Re: This guy seems to know what he is doing with manifolds..

Post by Charlescrown »

Very nice work but I can see some serious issues trying to tune in the high vacuum areas with the throttle body problem.
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Re: This guy seems to know what he is doing with manifolds..

Post by vlad01 »

I have to say, such a manifold design wouldn't work well, maybe ok for boost applications?

He's applying exhaust designs for the intake and running backwards.

Similar in principal manifolds exist on some toyota 4x4 but they also have at least some plenum and straighter runners.

Makes alright torque at low rpm but thats its.
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Jayme
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Re: This guy seems to know what he is doing with manifolds..

Post by Jayme »

my issue with it is the runners arent equal length. runner length affects airflow differently at different rpms, so on a real engine, the cylinders will vary in airflow.

also, perhaps he should be thinking of a square bore quad throttle body.... this would solve the issue he has with the single plate directing the air to two cylinders and the whole thing is almost the size of a square bore anyways.
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Re: This guy seems to know what he is doing with manifolds..

Post by vlad01 »

Then it would be like ITBs And ITBs are step backwards from a properly designed manifold.


I did a lot of simulations on ITBs, they are terrible lol, only good at a very narrow power band, alright for full on race cars that just sit at full noise all the time.

i should post up a VE plot of a sim.
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