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#1
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PSA: throttle body butterfly valve freezing open
This is just an observation I made Saturday night last weekend. Almost forgot about it.
The night of the day I installed the phenolic spacers, I took to the highway and gunned it. Temps are in the 20s and remember I have the tb coolant bypassed. Under this particular situation and environment, under speeds not going to be mentioned, though perhaps slightly over the local limit of 70, freezing of the tb b valve does in fact occur. Speed itself is not necessarily important here but revolutions of the engine as air flow increases with rpms and not relative ground speed per se. What I noticed upon letting off the throttle was a much slower than anticipated/usual winding down accompanied by a whine as if a certain gear is selected at high rpm and not upshifted. So moral to the story is if you have the tb coolant bypass and you live in an area with a similar climate and expect to be revving either purposely or accidentally (ice will do that) you might want to re-pass the tb coolant through for the duration of the winter On another note, since then with dropping temperatures to the 10s, cruising at low speed has not been affected by this phenomena. (:
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. |
#2
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you should not have the TB bypass with the phenolic spacers... it is pointless just hook up the tb coolant lines again
Tom |
#3
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Hi Guys,
What are "phenolic spacers" and where do they go? Thanks
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May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#4
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Quote:
http://www.outlawengineering.com/
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#5
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Quote:
Observation 2: Last night with lots of open throttle nothing happened. No freezing. Under 10* all night. o_0 Weird.
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. |
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