Hot hot hot intake manifold

[R27SG]

Hi guys. I have a problem in my hot climate of 35 degree celsius ambient temp.

My intake air temp is reading 60 celsius on the freeway and 70 celsius in traffic.

When that happens the ignition timing is greatly retarded and the car feels sluggish.

I realise this is due to heat soak and radiator fan blowing hot air onto the manifold.

I am weighing my options on DEI reflect a gold tape to wrap the manifold or to do ceramic coating. The latter cost much more and reviews from tuners said that the tape works better.

Anyone driving a 197 in hot climate care to share if you are experiencing the same thing?

I need to reduce the intake air temp!!! I am on stock airbox btw.

Hope to hear some comments. Thanks

 

[fano45]

Ive read that thicker manifold gaskets make all the difference in other cars. Not sure we have that solution though.

 

[Raptor6767]

Made one with my friend.

HDPE inlet gasket

In the combination with the DEI tape it seems to work fine.

 

[fano45]

Do you have specifications? Or a link?

 

[R27SG]

https://www.designengineering.com/c...gineering-inc/heat-sound-barrier/reflect-gold

My concern is the difficulty of pasting. Am afraid it gonna look like frankenstein.

 

[R27SG]

An example of how it will look like after wrapping. Ghetto style

 

[R27SG]

Made one with my friend.



In the combination with the DEI tape it seems to work fine.

Cool. Are u selling it?

 

[Raptor6767]

How I did it with the tape.

On Saturday (11AM) I started to wrap the intake manifold with the DEI tape.





Throttle body was in need of cleaning:





Like brand new:








Intake manifold was in need of cleaning too (was only ~37kkm on the car):










After the removal of the lower inlet manifold (a pain in the ass if doing it for the first time) I've started to tailor and wrap the DEI tape. If I knew it would take so much work and time I don't think I would have started it in the first place.

Because of our configuration of the inlet manifold and it's ragged surface, I would recommend sanding and ceramic coating over this that I did. I believe it would be a much easier job.
IMHO, the biggest fail was my shortage of the tape, and the fact it couldn't stick to the lower inlet manifold. That's why I would recommend fine sanding before the procedure to smooth out the surface. I didn't have the time and most important - didn't want to remove the injectors (and of course, didn't have enough of tape).

Sunday morning (8AM):





Lower manifold remained as it was (and it was a HUGE pain in the ass to remove) unfortunately:





I had some tape left so I've decided to wrap the airbox hose, at least the engine side.










DIFFERENCE?




IMHO - you can feel the inlet manifold not heating as much as before - HOWEVER - considering the time/money (the tape is not cheap) and the effort put into it - not worth it. If you want to do it - go with ceramic coating of some sort and do both inlets.




CONCLUSION


I've spent the whole Saturday and the Sunday morning doing this (good thing I consider messing around the car as a relaxation) and for a minimal effect. However, I did clean the TB and the inlet.


Next thing - PTFE gasket between the engine head and the inlet so the heat transfer won't be that high, and heat wrapping the exhaust manifold because I can feel the heat coming from the back of the engine when lifting the bonnet. Will do all of that at the same time if I decide to get some head work (again ).

TBH, I would recommend ceracoating.

 

[R27SG]

What would you reckon if you were to wrap the whole top and bottom manifold? My plan is to wrap the entire plenum. With a PTFE gasket.

Do you happen to make PTFE gasket for the throttle body also?

Cera coating like Zircotec cost too much plus immobile for weeks is too inconvenient to me.

 

[h_____]

Just to add, also running a 197 RS in a hot climate, and suffering issues, although it ran fine last summer, its now running very sluggish, and its a little intermittent. Not sure where to start the search. BTW - where are you and whats hot? Its around 40 degrees here and its going to get hotter.

 

[Kazumz]

To be fair, doesn't this happen to all cars in hot climates? If yours is slow, the chances are, everyone else's is the same?

 

[h_____]

Although mine was OK last year.....so something has changed.

 

[Raptor6767]

Clio R3 Evo Maxi has the IAT sensor on the airbox. There are much more realistic readings than on the inlet manifold that has serious issues with the heat soak.
You have it all in my topic on how I relocated the IAT sensor and the readings that I got with the IR temperature reader on the inlet manifold, the IAT sensor and the airbox.

 

[R27SG]

Did these to counter the heat. Just had a short drive today. Gonna monitor and share more info later.


Scorching hot inlet manifold






Notice alot of oil in the inlet manifold due to oil vapors from the pcv. Custom an oil rebreather capture tank. It gonna works perfect





MAP sensor loose? Might as well secure it with a bracket

 

[fano45]

Could you share some info on that oil catch tank

 

[R27SG]

Pardon my poor explanation, anyone who can explain better please do so.



Background: Engine breather releases pressure from the crank. Oil fume makes manifold oily. Non desirable.

Oil catch tank: Main usage is for very high compression racing engine. A Porsche Carrera Cup race car could see oil evaporation up to 5L. But occasional blast on the road will also cause some oil to dirty the manifold. Hence i built this aluminum hosing with steel filament inside to cool down the fume and let the oil drip back into the crank.



This thing cost me about £150. Sounds ridiculous but it makes my engine bay neat and doesn't increase weight like those universal oil catch tank. This is a prototype. If there is interest, I can arrange a group buy to bring down the cost.

 

[fano45]

Just a thought. Could you not use an inline transparent fuel filter to do the same thing?

 

[R27SG]

do you have a picture of those?

 

[fano45]

 

[R27SG]

oh wow like the rotrex oil filter...yes it should work too