under normal running then it appears to be this glowing red hot? I am worried some say it is normal and some say it's not...I am a bit confused NO CEL, car run fine, no funny smell Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
I post a possible solution on your previous thread. Get a heat gun capable to read up to 1000 celsius. After you use the car and see the cats on that condition use the gun and read the temperature. The normal operating conditions are 400-800C. If you get a temp higher than 800C it is possible that your thermalcouples are not reading well and your EUC never will know that and you won't see any cel. It is a cheap way to know what is going up. My $0.02
Thanks I will have it checked, will post the result to you guys, thanks for your contributions I thought it is no good to post the brand before knowing what is going on... so I open a new thread.
try disconecting the exhaust valves to bypass most of the muffler and see if she breaths a little better /cooler ??....(two hoses by muffler and make sure you plug em with some golf tees or such
I understand your point, but I try to drive it very gentle, with the valve shut most of the time it is not that fire hot, (it appears to me normal temp) I think is the cat has restricted some flow at the high rpm and all kinetic engery converts to thermal engery and thus the CATs become fire hot. But driving a f430 is not about changing gear at 3000 rpm right? I also love the changing sound of valve opening. So I don't think it has anything to do with exhaust valves. I need to check with supplier to see what is actually going on. I am still not sure what temperature it is running on such color, I did some research that the maximum service temperature (Air) for the T304 stainless steel is 925 C and the melting point of the T304 is 1450C. So until I get the temperature of those Cat, I can't do anything. I will keep you guys posted. Thanks for your advice anyway. My plan is to get ceramic type of insulation tape for 950C to wrap the cat and prevent further damage to the car like bushings and worst get the car toasted
You should just avoid driving the car until you find the problem. If the car is running lean, which can cause the high temps, you could burn valves or worse. Wrapping the cats will just keep the extreme heat inside, and could potentially cause more damage.
Hey Shane, Did you saw my misfire thread? I found why my car was running lean, it was a damage gasket at the 4 cylinder on the intake manifold.
here is the read out for my F430, is it normal, how do you tell its running lean or rich Image Unavailable, Please Login Image Unavailable, Please Login
Look at the exhaust temperature at the cat! 820C! The normal operating temp is way below that. A system running to rich will allow to much heat into the exhaust system. If the system runs lean you will feel a backpressure situation at the exhaust. Check your cats performance and your o2 sensors. Maybe something is wrong with the cells inside the cat that is holding to much oxygen particles inside it which is also a symptom of a lean combustion. Try to use your old cats and run the same test you just did to see the exhaust temperature. You can start from there.
So what is the normal exhaust working temp?? I think the intake is high as well Which figure indicate the air fuel ratio
The supplier told me if the there is no cel, then it considers the cats are fine. I feel the exhaust air is higher than before after installing those cats.
The normal temp at the exhaust system is between 400 and 600 Celsius with a max temp of 800C. For sure your intake air is hooter because that cats are frying the air box. There is not a Air/Fuel ratio on the intel you provide. If you go to any emision inspection center, they will put a a/f ratio meter at your exhaust tips.
Not always. Design Tmax on newer cars is higher than 800C. 800C is well below accelerated aging cycles for design/calibration work.
Engine is showing a load, did you run it on a dyno to get it to glow like this? The F430 stock cats are made by a competitor, so I don't have all of the design info for that car. However, 800C isn't going to destroy them. Operating temps are going up across the board for a lot of different reasons, mainly fuel economy.
The car was in neutral, and the technician was just reving the engine, I mainly just check for error codes and there was none. Maximum limit service temperatures in dry Continuous air flow, based on scaling resistance for SS304 is 925°C, the CAT is approaching its limit. http://www.azom.com/details.asp?ArticleID=1175
True, but his car is reading 800C at stop. I can't imagine what temp would be those cats at high rpm for a long period of time.
Depends where it is on the engine map at WOT, if there is a lean bias, they will get even hotter, you do get a lot of air going through at high speeds, that also will help cool them, if the design is right.
You just said! That is why I recommend that he should check the new cats, it is probably that the cells inside the new cats have some problem and it is restraining the flow because any oxygen built in. I know fabspeed have great feedback but always is a first time on any product.
Comment on the oxygen doesn't make sense, O2 levels out of the engine will drive O2. My comment on design was more on ensuring even flow across all of the cells of the catalyst, nothing to do with cells themselves.
