Phenolic Intake Spacers - Redux
Phenolic Intake Spacers - Redux
(OP)
OK i did a search here and did not find anythig but if there are threads about his please point me to them.
Yes it's the age old question... Do phenolic (or any insulating) intake manifold spacers really work? Do they actually cool the intake change and make power?
I vote 'No'. But after searching the net I find so many convicing arguments that they do work that I'm curious. Do any of you Automotive Engineers have any real data to end this ?
I cant see the intake charge being affected after the engine is up to operatng temps. Sure the manifold might be cooler at start up or after shutdown but the column of fast moving air inside the runners??
Yes it's the age old question... Do phenolic (or any insulating) intake manifold spacers really work? Do they actually cool the intake change and make power?
I vote 'No'. But after searching the net I find so many convicing arguments that they do work that I'm curious. Do any of you Automotive Engineers have any real data to end this ?
I cant see the intake charge being affected after the engine is up to operatng temps. Sure the manifold might be cooler at start up or after shutdown but the column of fast moving air inside the runners??





RE: Phenolic Intake Spacers - Redux
Do they cool the intake charge. Hardy. Probably not to a measurable degree at anything like full throttle, and part throttle does not matter.
Do they help stop vapour lock or boiling fuel in the carby. Certainly.
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RE: Phenolic Intake Spacers - Redux
Reidh
RE: Phenolic Intake Spacers - Redux
RE: Phenolic Intake Spacers - Redux
The research I've done suggests that spacers do nothing to the IAT from TB to back of valve.
The boundry layer is a nice insulator.