Motordyne Plenum Spacer question
#1
10-20-2009, 01:04 AM
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Motordyne Plenum Spacer question
#3
10-20-2009, 03:56 AM
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#4
10-20-2009, 12:27 PM
From the motordyne site...
I still haven't installed mine. It would probably benefit you in Hawaii to not cool the plenum because it rarely goes below about 50 deg. F (I believe this is the threshold at which you're supposed to turn the coolant back to flowing).
Why would I want to shut off coolant flow to my plenum with the coolant control valve? Wont the plenum run hoter without it?
No. Its actually the other way around. Hot coolant is flowed directly out of the engine (at about 210’F) and into the plenum assembly. The purpose of this is to heat the plenum which in turn heats the attached throttle body. The throttle body is heated to prevent ice formation on the throttle body butterfly valve when driving in very cold weather. This is to prevent lean stalling of the engine when you let off the gas.
But it is not always necessary to heat the entire plenum assembly. In fact, better engine performance can be attained by not heating the plenum assembly.
A hot plenum assembly heats the incoming air and hot air increases the tendency for ping and reduces air density.
So weather (sic) you live in a hot or cold environment, other than to prevent throttle body ice formation, there is no need to heat up the incoming air charge.
No. Its actually the other way around. Hot coolant is flowed directly out of the engine (at about 210’F) and into the plenum assembly. The purpose of this is to heat the plenum which in turn heats the attached throttle body. The throttle body is heated to prevent ice formation on the throttle body butterfly valve when driving in very cold weather. This is to prevent lean stalling of the engine when you let off the gas.
But it is not always necessary to heat the entire plenum assembly. In fact, better engine performance can be attained by not heating the plenum assembly.
A hot plenum assembly heats the incoming air and hot air increases the tendency for ping and reduces air density.
So weather (sic) you live in a hot or cold environment, other than to prevent throttle body ice formation, there is no need to heat up the incoming air charge.
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10-20-2009, 10:05 PM
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#6
10-21-2009, 12:22 AM
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