Refresh951's Hybrid Ultra Stroker Build
03-29-2014 | 05:46 PM
#1323
Rainman
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Joined: Jan 2007
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From: Nashville, TN
Hey Shawn,
This might be something worth playing with, I noticed it today at the boneyard. It appears to be a flow-straightener device, placed between the throttle body and the "plenum" off a late-model Ford 4.6 2v engine. My guess is they keep air attached at the small/large radii of the plenum.
One of the first steps people take in getting power from the 4.6 is to increase TB/plenum size as the plenum is thought to be restrictive for airflow, due to the 90* bend the air makes entering the manifold. Maybe this was Ford's solution while keeping costs down? Your intake makes a curve after the TB too.
Looks to be only on the drive-by-wire variants of the 4.6 2v, so likely the last few years of production only. I saw 3 or 4 of these engines/TBs within a 25 ft radius.
This might be something worth playing with, I noticed it today at the boneyard. It appears to be a flow-straightener device, placed between the throttle body and the "plenum" off a late-model Ford 4.6 2v engine. My guess is they keep air attached at the small/large radii of the plenum.
One of the first steps people take in getting power from the 4.6 is to increase TB/plenum size as the plenum is thought to be restrictive for airflow, due to the 90* bend the air makes entering the manifold. Maybe this was Ford's solution while keeping costs down? Your intake makes a curve after the TB too.
Looks to be only on the drive-by-wire variants of the 4.6 2v, so likely the last few years of production only. I saw 3 or 4 of these engines/TBs within a 25 ft radius.
03-30-2014 | 12:41 PM
#1324
Thread Starter
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Joined: Jun 2010
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From: Marietta, Georgia
Thanks Jim! Snow starting to melt up their?
03-30-2014 | 12:45 PM
#1325
Thread Starter
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Joined: Jun 2010
Posts: 3,365
Likes: 22
From: Marietta, Georgia
Hey Shawn,
This might be something worth playing with, I noticed it today at the boneyard. It appears to be a flow-straightener device, placed between the throttle body and the "plenum" off a late-model Ford 4.6 2v engine. My guess is they keep air attached at the small/large radii of the plenum.
This might be something worth playing with, I noticed it today at the boneyard. It appears to be a flow-straightener device, placed between the throttle body and the "plenum" off a late-model Ford 4.6 2v engine. My guess is they keep air attached at the small/large radii of the plenum.
04-01-2014 | 04:21 AM
#1326
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Joined: Feb 2006
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From: Australia
Yes it is interesting. I have been analyzing logs all weekend . The loss of power in mid range makes sense to me and I expected it. The stock long runners provide dynamic charging in this rpm range so in effect it appears as higher boost at the cylinders (probably on the order of 1-2 psi). With this dynamic charging removed power is reduced here. I think the stock long runners start hurting VE above about 5500 rpm and this is when this intake should be beneficial. At the dyno I will rev to about 6600 rpm. Wish I could go higher as I think it would keep making power but I will not risk it from an oiling standpoint.
The much quicker spool really was unexpected. Going to think about it a bit more and try to understand better why.
. The loss of power in mid range makes sense to me and I expected it. The stock long runners provide dynamic charging in this rpm range so in effect it appears as higher boost at the cylinders (probably on the order of 1-2 psi). With this dynamic charging removed power is reduced here. I think the stock long runners start hurting VE above about 5500 rpm and this is when this intake should be beneficial. At the dyno I will rev to about 6600 rpm. Wish I could go higher as I think it would keep making power but I will not risk it from an oiling standpoint.The much quicker spool really was unexpected. Going to think about it a bit more and try to understand better why.
04-01-2014 | 07:04 PM
#1328
Thread Starter
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Joined: Jun 2010
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From: Marietta, Georgia
I'm just wondering if you are seeing earlier tq as well due to the better spool? I was actually expecting to see your tq shift further to the rhs with the shorter runners Shawn but am now very curious to see how this has been affected compared to the stock intake. I'm actually wanting to shift the tq across a bit and assumed the shorter runners would do it, but am not so sure now based on what you've found to date?
04-02-2014 | 05:12 AM
#1330
Race Car
Joined: Mar 2002
Posts: 4,329
Likes: 41
I think some things I previously posted are not accurate. The quicker spool is related to comparing street pulls with dyno pulls and the loading is different. Hoping to go back to the dyno this Thursday and test a couple more things then I will do a write-up of the comparison.
When I swapped intakes, and even after reworking the ign profile and boost settings, I noticed little to no difference on how soon in the RPM band I would reach peak boost, so I was a bit surprised about your initial reports... but then you turbo is a bit larger than mine too...
Anyway, looking forward to hearing more of your results.
Last edited by Thom; 04-02-2014 at 07:46 AM.
04-02-2014 | 09:27 AM
#1331
Race Car
Joined: Apr 2009
Posts: 3,641
Likes: 1
From: Knoxville, TN
Ug, what a f***ing nightmare dealing wtih those yahoos in the vehicle center was.
It has no performance improvement, whatsoever.
04-02-2014 | 09:51 AM
#1332
Rainman
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From: Nashville, TN
Damn, make a brother feel old, why don't you? Stuff I worked on showing up in u-pull-it yards? Ouch. That device was put in for NVH - "Noise, Vibration, Harshness." When Ford went ETC, the strategy they used was to whack that throttle plate wide freakin' open at tip-in. Personally, I hated it. Made the car feel undrivable, and dangerous in parking lots. Regardless, one of the side affects was that when you went from a big vacuum in the plenum to essentially WOT at idle speeds, you hear a "whoosh." So, we started having to put "whoosh plates" on a lot of the applications where ETC was retrofitted onto an existing platform.
Ug, what a f***ing nightmare dealing wtih those yahoos in the vehicle center was.
It has no performance improvement, whatsoever.
Ug, what a f***ing nightmare dealing wtih those yahoos in the vehicle center was.
It has no performance improvement, whatsoever.
The weird thing was just how clean the plenums were despite their super-high miles. Still, a neat part.
04-02-2014 | 09:23 PM
#1334
Thread Starter
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From: Marietta, Georgia
160 lb/hr injectors are in. I love Rogue's tuner/logger. Dropped fuel pressure to 3 bar, adjusted global fuel and injector dead time. Three tuning passes and I am dead on. AFR's are perfect. Idle is perfect. Dyno tomorrow night. 