I have a CHT who is to high so I will try to install plenum on my rocket.
Is there some good or bad experience whit different manufacturers and is there some plenum who fits direct to the air inlets.
My english is`nt the best but I hope you will understand
Roger
Norway
I have check my baffle and can`t find any leaks.
I`m worried about my cht who can reach 440 in climb, normaly 425. In cruise 390-405F in the summertime.
There is syl. 1-2-5 who has the high temp.
oiltemp is fine (180F)
Is there some other things I can try, to get my CHT down?
I adjust the timing from 25 to 23 deg. The left mag touch the firewall so I could not adjust it lower to 20 degrees.
My engine is a narrowdeck (D4A5), ly-con rebuild. lycon modified lycoming syl, (flow balance). 10:1 comp. with 155hours.
-with full power I have around 22 usg, but I will check exactly.
-one exampel: cruice at 22,5/23, fuelflow 12,8. EGT 1384 (50F ROP) I still have CHT 401F. I have high CHT in all settings, not only with full power.
-an another example: 23.5/24, fuelflow 16.7, EGT 1342 (50 ROP) and CHT 391
I have cut a extra small pice of my air outlet, so the outlet is 70% bigger than the inlet. I will check the in and outlets so they are 100% clean and smood.
I read a tread about "Cowl Inlet Area" Maybe i should route everything so the air goes cleaner too.
I check think my cylinderfin and I think they is ok but I have to take a new look to be sure.
Maybe 50F ROP is`nt the best way to cruice but this is what I have read and what others I know doing..?
I can send you some pitures Tom but I have to do it on you email address. for some reason I`m unable to post pictures here. - [email protected]?
It would appear others have accurately suggested the mag timing may in fact be the cause of your heat issues and you should certainly address that, however should that not fix your problem James Aircraft do a plenum for the 540.
The problem with commercial plena is that the HRII cowl curves tightly around the engine and a 'flat' plenum (RV-10) style won't fit.
Did they paint it? I thought they went with a vinyl wrap.
Regardless, they hopped up the engine and added inverted systems. It was a great airplane before. Now, I'd probably wet myself.