Upper plenum project 75mm Maxima TB
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Stanchions were removed for 2 reasons, to increase plenum volume and airflow around and over the top of the runner. I have no interest in removing all six as the centers offer a lot of support. The goal of this project is to increase airflow to the plenum and then a spacer can be added to tune plenum volume. It has been proven that revup lowers do not benefit from a spacer or show very little gains, but what if the airflow is increased?
Last edited by 1cockyZ; Mar 10, 2015 at 06:42 AM.
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Dyno tentatively scheduled for Thursday afternoon. Will be compared against APS tallboy and Kinetix Velocity. 75mm tb will be used for all tests. Wideband will be used and I am hoping that plenum vacuum can be monitored as well.
Nonrevup lower will used with modified upper and APS upper.
Last edited by 1cockyZ; Mar 10, 2015 at 03:15 PM.
Dyno tentatively scheduled for Thursday afternoon. Will be compared against APS tallboy and Kinetix Velocity. 75mm tb will be used for all tests. Wideband will be used and I am hoping that plenum vacuum can be monitored as well.
Nonrevup lower will used with modified upper and APS upper.
-Quick Question...Is the Kinetix V+ Intake manifold (The plastic one) worth trying? Does it have a larger inlet for the throttle body than stock?
-I am looking to run a NWP 75mm Throttle body with my set up. I was considering having the stock upper manifold inlet bored out to make a 77mm passage way...just don't know if there is that much material that can be safely removed without issue...
Thanks!!!
Last edited by dsm_mikey; Mar 11, 2015 at 06:41 AM.
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From: Toms River, NJ
Thread Starter
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From: Toms River, NJ
3.5" Amsoil filter with internal v stack, 3.5" pipe to 75mm ID maf housing and then into samco tube which is a little over 3" ID. It's on the car and running. Dyno later
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I tested it without a spacer. I will have the results tomorrow, everything went smooth doing 3 pulls with each manifold and swapping them on the dyno. All pulls in a 2 hour window.
(But seriously, I am quite interested to see what you find).








