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#16
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Hanging around race tracks and drag strips... I have seen some extremely fast cars with some of the ugliest and most off the wall things done to them.
Effective doesnt have to be pretty... and I have seen some BEAUTIFUL fab work actually lose power. I always have gone by the idea of making it work be the primary goal, and making it look nice the secondary. Thanks for the extra luck. Jim
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1992 Dark Teal LS-L with 4.44 swap. NC Plate "EVIL I" *Dont Fear the GEAR* 1977 Ford Pinto baby blue with 79,000 miles |
#17
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Jim,
Version 2, which I've been running for the last 2+ years, actually uses 4" diameter racing brake duct (high temperature) that runs down to a vacuum formed inlet (used a lot for inlets to brake cooling systems). Stay tuned on the plenum front - YT is going to work up something based on a conversation the two of us had. I'm also working on yet another approach that will be a little more involved... -Bill (once an engineer, always an engineer....) p.s. on the TB front, OT and I are already running intakes that are ported/polished to match the TB. OT also did some minor mods to the TB to provide for a totally horizontal positioning of the plates at WOT
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Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#18
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Bill, good things to hear.
I may be late to the game, but its nice to know I have still arrived at the right sport. I am very interested in the idea on more plenum volume. I need to get my hands on an intake manifold so I can look into joining the separate the existing plenums for greater volume and to allow each bank to draw from both throttle plates. Jim
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1992 Dark Teal LS-L with 4.44 swap. NC Plate "EVIL I" *Dont Fear the GEAR* 1977 Ford Pinto baby blue with 79,000 miles Last edited by Evil One; 10-28-2007 at 10:13 AM. |
#19
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Quote:
There is already provision for the two plenums to be cross linked by means of the induction control valve and the associated variable intake system. I have previously suggested that experiments should be carried out with the valve held constantly open, or removed so as to increase the cross section of the interconnection, but as far as I know this has never been done. The existing set up allows the frequency of incoming pressure to match RPM, thus assisting the filling cylinders, and improved breathing efficiency. The frequency depends on the cross-sectional area of the interconnection and an increase here will raise the point of assistance in respect of RPM. Going by the data published in the manuals, it would appear that this would result in a reduction in efficiency around 3600 RPM. However the upwards curve would be constant, rather than peaking at this point, as is the result of the ECU controlled variable set up. Clearly there could be advantages in respect of a performance engine, where a cruising mode is not important. Trevor.
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! Last edited by Trevor; 10-28-2007 at 03:05 PM. Reason: Info added |
#20
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Quote:
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Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#21
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Trevor, from what I have been reading... your knowledge of how these cars are made is astounding.
I shall make this a priority in my testing. Jim
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1992 Dark Teal LS-L with 4.44 swap. NC Plate "EVIL I" *Dont Fear the GEAR* 1977 Ford Pinto baby blue with 79,000 miles |
#22
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Jim,
I was going through my "spare" parts today, and I came across a stock air box I was saving for some "experiments". PM me if you're interested in it. -Bill
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Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#23
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Quote:
http://www.subaru-svx.net/forum/show...=intake+copper
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Kevin Thomas 1997 2.2ltr Subaru Impreza Outback Sport Wagon (AWD/Auto) 13.03@100mph 1989 2.7ltr Subaru XT6 (AWD/Auto) 15.912@85.93mph 1996 3.3ltr SVX (AWD/Auto) 15.070@91.38mph ***R.I.P*** 2010 RAV4 AWD Sport (13.717 @ 99.19mph ) 2015 Honda Fit LX CVT (15.2 @ 90mph) |
#24
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Yea, I read the thread about the copper box.
Jim
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1992 Dark Teal LS-L with 4.44 swap. NC Plate "EVIL I" *Dont Fear the GEAR* 1977 Ford Pinto baby blue with 79,000 miles |
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