subscribed for updates , got a set of s54 itbs sitting in the garage.
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Kadunza S54 ITB Adapter Plate Project
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Originally posted by Jalves619 View PostFor someone running a standalone, will the vacuum "log" provide an adequate map signal? I wouldn't want to run alpha N because I intend to run FI as well.
We will be putting a turbo on an ITB m20 soon. I plan on using a hybrid alpha-N speed density (MAP), but will have to cross that bridge when we get to it. Hoping I can have the MAP signal in the plenum (pre-throttles)
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Originally posted by ForcedFirebird View PostI have not had any luck tuning ITB's in Speed Density. It CAN work, but the resolutions sucks as you will be reading about 80kpa at idle. I have read where people use a large vacuum manifold and buffers to slow/mix the pulses. I put a vacuum gauge on a vacuum block and the needle bounced erratically and was only pulling about 8" on average with a huge swing between.
We will be putting a turbo on an ITB m20 soon. I plan on using a hybrid alpha-N speed density (MAP), but will have to cross that bridge when we get to it. Hoping I can have the MAP signal in the plenum (pre-throttles)89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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cant wait for this. plan for mt2 car is s52 itb
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Originally posted by digger View Postm50 runners 1&4 drawing (flow is 3.2L 100% VE 8000rpm) 11% variance
angled entry runners 1&4 drawing (flow is 3.2L 100% VE 8000rpm)
2.5% variance
no questions that the angled entry provides better distribution. with the OEM runners 3 & 4 see more flow than its neighbours due to the poor design. air just dumps into the volume and the velocity of the air means it has difficulty turning corners.
most people flow test individual runners but that is useless for looking at distribution
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Not really, imo where the throttle body bolts on the two closest runners 3&4 are located poorly that air will have difficulty making the sharp bend . Also the shape of each runner is different with some having really tight bend.89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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