11-06-2009, 02:29 AM
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#1 (permalink)
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Forum Member
Join Date: Jan 2003
Location: San Jose, CA
Drives: 1992 3000GT VR4
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Coolant flow to throttle body - still necessary?
I'm currently mid engine rebuild, and while the engine is out, I'm looking for ways to keep the intake (specifically intake plenum) temperature down. There are many direct contact hot parts which serve as heat transfers, allowing the intake plenum to get really hot -- and I've blocked all of them off except for one (coolant through the throttle body). To make a long story short, I've purchased these two items from 3SX (among other things):
Phenolic plenum spacer:
3SX Phenolic Plenum Spacer 3000GT/Stealth*-*Mitsubishi 3000GT*/*Dodge Stealth Parts
Phenolic throttle body spacer:
3SX Phenolic Throttle Body Spacer*-*Mitsubishi 3000GT*/*Dodge Stealth Parts
It makes sense that the second spacer would be necessary b/c coolant flows through the throttle body, but what if it didn't??? My question is:
Is it still necessary now that I have the plenum spacer for coolant to flow through my throttle body? My thought is that coolant might actually be heating up my throttle body instead of cooling it now that I have the spacer installed. Can I delete/remove the coolant tubes flowing to / from the throttle body? I just don't see why flowing coolant through there is necessary anymore now that the manifold should be much cooler.
Thoughts??
- Jeff
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1992 RED 3000gt VR4 @ 17PSI
Engine Management:
MAFT-PRO v5.13a (SD mode w/ Electronic Boost & Load-Based Timing Control, GM 3 BAR MAP Sensor, GM IAT Sensor, & AEM UEGO WB O2).
Air:
DR-650s, DSM SMICs w/ 1 3/4" piping, 2" DN Performance intercooler hard pipes, IPS no-MAS intake pipes w/ dual K&N filters, ported & polished upper & lower intake manifolds, GReddy Type-S BOV (open loop), ET-Performance krank vents.
Fuel:
Supra fuel pump (hotwired), Labonte ISG-25 stage II water/meth kit w/ Snow Performance Boost Juice, 720cc Denso injectors, AEM FPR @ 45psi base pressure.
Ignition:
MSD 8.5mm superconductor wires, Denso iridium IK27 plugs @ .030", Odyssey PC925 battery.
Engine:
DR stage ]|[ heads, .50mm overbore, '99 lifters.
Exhaust:
Swain Tech White Lightning coated OBX headers & O2/pre-cat eliminators, ATR 3" downpipe, 3'' test pipe, ATR 3" catback.
Drivetrain:
RPS 6-puck disk, RPS lightweight flywheel, 3SX lightweight crank pulley, 3SX polyurethane motor mounts, stillen drilled and slotted rotors, 18x9.5 5Zigen FN01RC rims, BF-Goodrich KDW-2 tires, Cusco rear strut bar.
Miscellaneous:
Corbeau seats, short throw shifter, presidential alarm system, 300lbs of miscellaneous weight reductions... "who's your daddy?" license plate 
Audio:
Kenwood headunit, Alpine PDX-4.150 amplifier, Polk MM6501 components, Polk MM691 3-way triaxial, 8 inch bazooka tube.
Future Mods:
1 Piece PST CFDS, Carbon Fiber Hood
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