OK
Need an answer, preferably technically correct, to a question about head temperatures.
How hot does the inlet face of a pinto head get...? I know some of the Rovers use a plastic manifold, and I may have a way to produce limited runs of
injected/cast plastic manifolds, but only if I can get the right material for the temperature.
So, anyone know...??
Cheers
Pete
Ok so this is not a particularly technical response but since the water in the system is near boiling point inside the head and not flashing into
steam. The outside surface I would imagine would be slightly cooler and at a stab in the dark I’d suggest about 90 C sounds right. Most plastics can
take over 110 C so I see no problem.
Why not get a sample and bolt it to a cylinder head and see what happens…
quote:
Originally posted by macnab
Ok so this is not a particularly technical response but since the water in the system is near boiling point inside the head and not flashing into steam. The outside surface I would imagine would be slightly cooler and at a stab in the dark I’d suggest about 90 C sounds right. Most plastics can take over 110 C so I see no problem.
Why not get a sample and bolt it to a cylinder head and see what happens…
If the pinto is of a Xflow type, then the inlet side will be cooler than it might otherwise be. The coolant (if mixed correctly) may well not boil until it gets to 110-115 ºC, so the head may eventually reach a temp very close to this. It may also depend upon carbs vs injection. Injection will be hotter due to having a dry manifold. The carbs will have fuel in the air to aid cooling slightly. I'd still guess 120 ºC as a maximum.
saying that i would use a material wich could withstand 130degrees!
wy? because the last thing you want is that your are without a inlet not??
saying that the the total engine will die if it ever gets that hot on the inlet traject..
TKs
I've never tried it on a car but years ago I used TUFNOL (a phenolic resin laminate) for carb spacers on motorbikes. Might be worth a try, unless anyone on here knows better.
Have done a bit of testing on a few plastic inlet manifolds. Wasn't anything to do with temperatures but the most exciting test to create an
explosion in the manifold to simulate a backfire. I would suggest you want to consider such a load case when you are working out how thick to make the
material.
Chris
quote:
Originally posted by stevebubs
[Your thinking is not strictly true as pressure of the system will raise the boiling point of the water.
Inlet ports are significantly cooler than exhaust ports, though...