[StefVan]

Thanks Trev , interesting subject. I agree, a Cortex would be large enough to handle this, even an ATMega32 at 16Mhz would easily do the deal. I've a bunch of them in my lab with all possible shields. Arduino is great and fast to prototype an idea and then create a pilot from it in real C++ without needing the Arduino boatloader and using real interrupts for real time "multi-task" processing. I developed several low level libraries to simulate multi-tasking without generating delays. Not a big issue with low frequencies < 10Khz (like the shift light) but managing several freq generators at >100Khz, it's getting trickier. Anyway, I stop here before the audience starts running away

BUT, grace to Russell, I got the info that Capristo is close to launch exactly such solution in 2 different versions.

Advanced Lamba simulator with learning capacities

Basic Lamba simular


Both can be configured through USB

Wait and see how good these solutions will be in real life (even if, as all know, I do not promote cat elimination ) But it would very interesting to study how far you got in your ground work

[Tio]

I do indeed have to say a Big thanks to Trev for all his help during the troubled period I had with the cats.
You spend a lot of your time and effort and gave me lots of advice!

Thanks Buddy!

[360trev]

Originally Posted by Tio

I do indeed have to say a Big thanks to Trev for all his help during the troubled period I had with the cats.
You spend a lot of your time and effort and gave me lots of advice!

Thanks Buddy!

[360trev]

Originally Posted by StefVan

Thanks Trev , interesting subject. I agree, a Cortex would be large enough to handle this, even an ATMega32 at 16Mhz would easily do the deal. I've a bunch of them in my lab with all possible shields. Arduino is great and fast to prototype an idea and then create a pilot from it in real C++ without needing the Arduino boatloader and using real interrupts for real time "multi-task" processing. I developed several low level libraries to simulate multi-tasking without generating delays. Not a big issue with low frequencies < 10Khz (like the shift light) but managing several freq generators at >100Khz, it's getting trickier. Anyway, I stop here before the audience starts running away

BUT, grace to Russell, I got the info that Capristo is close to launch exactly such solution in 2 different versions.

Advanced Lamba simulator with learning capacities
Attachment 47169
Basic Lamba simular
Attachment 47170

Both can be configured through USB

Wait and see how good these solutions will be in real life (even if, as all know, I do not promote cat elimination ) But it would very interesting to study how far you got in your ground work

Sounds interesting too. I've taken an OLIMEXINO-STM32, see;
OLIMEXINO-STM32 ARDUINO LIKE INDUSTRIAL BOARD
And I'm running Chibi RTOS on it.
ChibiOS/RT - Wikipedia, the free encyclopedia
RTOS Source code found at;
ChibiOS/RT Homepage [ChibiOS/RT free embedded RTOS]

I'm writing native C directly, controlling the GPIO pins to interface sensors, buttons, etc. This board also has a directly programmable CAN bus controller on it too making it perfect for F430 control. [green 3 screw connector].


This could be used to do all kinds of fun applications....

[360trev]

No need for extra complicated ecu cat simulators with this solution, its a miniature cat in the pipe ahead of the o2 sensor!! Just brilliant!

I love it. Such as simple idea and works great!


O2 Simulator Mini Cat Cel Fix

[StefVan]

Yep, read about these mini-cats too . It's a clever idea indeed because it does integrate several layers of Platinum&Rhodium&Palladium coated honeycombs just like a real catalyser. At 50$ each, it's worth trying for those having CEL issues and you need also 2 of them. It the best solution I've seen so far and well better than using spacers.

Here's the link of you're looking for them:

O2 Simulator Mini Cat Cel Fix

[Mr Aryan]

So anyone used those mini cats yet or should i be the first? My test pipes are on their way and dont wish to see the CEL on

[mikegr]

Originally Posted by StefVan

Hi Harsh,

I would not recommend to remove your cats or install any kind of race cats as this can have consequences on your engine. There are very few race cats on the market which can be considered as a replacement of the stock cats. Most of them have a very bad coating or worst, have a too small diameter. Afterall, it's your car but just be aware that on modern cars, catalysers should be considered as an integer part of the engine. Without them, an engine will not run in a normal condition, even with a so called remap of the ECU's

What diameter is good enough? I ve told by HJS that they have two dimensions, 100 and 120 mm.

[StefVan]

The stock cats are 160mm 300<400 cpi. You shouldn't go lower than 150mm as it will restrict the flow despite having 200cpi cats (a simple surface calculation will show you the result of possible exhaust flow). BTW HJS isn't a producer of catalyzers, they buy them from another manufacturer. All in all, changing your stock cats for 200 cpi cats will not improve much your car, even the opposite if you reduce the cat diameter and for sure you'll take higher risks of having a CEL. Sorry, but you can't bypass physical laws

[mikegr]

Originally Posted by StefVan

The stock cats are 160mm 300<400 cpi. You shouldn't go lower than 150mm as it will restrict the flow despite having 200cpi cats (a simple surface calculation will show you the result of possible exhaust flow). BTW HJS isn't a producer of catalyzers, they buy them from another manufacturer. All in all, changing your stock cats for 200 cpi cats will not improve much your car, even the opposite if you reduce the cat diameter and for sure you'll take higher risks of having a CEL. Sorry, but you can't bypass physical laws

I talked to the garage owner and told me that since these cats can support up to 550 hp there wont be a problem. Also he has a dyno, and he will arrange a meeting for me with a customer that has this set up for quite a long.
Just for information, HJS cats + custom muffler for 2000€, including installation

[Tio]

Originally Posted by mikegr

I talked to the garage owner and told me that since these cats can support up to 550 hp there wont be a problem. Also he has a dyno, and he will arrange a meeting for me with a customer that has this set up for quite a long.
Just for information, HJS cats + custom muffler for 2000€, including installation

It's not a question about what is the maximum bhp that one can gain
and what is the cheapest price, as to what it's the maximum power that can be achieved in a reliable way that will not cause you any extra headaches later on.
Please ask your tuner if he can guarantee that no CEL will appear after the mod.
Don't forget that everyone is trying to sell things but very few are those who honestly
guarantee their work and indeed know what they are talking about.

[mikegr]

he told me that he can do that. However my first step is to see his clients car and talk to the owner. I will see how his car compares with mine. Then i will think about it. In the worst case i simply may go for a hardcore muffler only, like Capristo 3 or Timate

[Tio]

Originally Posted by mikegr

he told me that he can do that. However my first step is to see his clients car and talk to the owner. I will see how his car compares with mine. Then i will think about it. In the worst case i simply may go for a hardcore muffler only, like Capristo 3 or Timate

Mike, honestly from experience and many other members will back me up on this, save some money and go for Capristo headers and blankets and you will get 30bhp up top and lots of low down torque too and a sound to die for!
Plus you will eliminate the possibility of destroying your engine when the OEM headers eventually fail.
And they will fail for sure!
I promise you, you won't regret it!

[mikegr]

30hp from headers only? Are you reffering to 430 or 360?
No headers can make my car sound like this
http://www.youtube.com/watch?v=cGjspTKh5LQ

[StefVan]

Originally Posted by mikegr

30hp from headers only? Are you reffering to 430 or 360?
No headers can make my car sound like this
http://www.youtube.com/watch?v=cGjspTKh5LQ

Well too loud for me, it is just very loud noise, sorry. I don't know in which country you're allowed to drive a car that loud. Making a car just loud is very easy and can be done with any car. But if you like it, go for it My approach is a more harmonic sound which doesn't explode your ears as well as those how drive or live around The GranTurismo S/MC Stradale is a perfect example of a perfect sound. Our F430's with just the Capristo headers upgrade is also a perfect example of a great and still pleasant sound.

Harry is right regarding the HP increase which varies depending on the F430 (not all stock 430's have the same HP/Torque) :

My stock F430 : Max 493.1 PS - 495.6 Nm torque
Capristo headers : Max 513.1 PS - 504.1 Nm torque

Most important : at 3000rpm, torque is increased of 41 Nm and 18.2 HP

[mikegr]

That is a great improvement.
I like the CS sound but since this a quite complicated, i would go for F1 sound. If i wanted just to make my car sound better the 430 muffler would be my choice, easy and cheap.
Another option would be not to mess with the cats and install a free flow exhaust, like this
Ferrari 360 Modena Super Sports Plus Exhaust System

[Tio]

Hi Mike, yes I refer to the F430.

Since the main issue of the F430 is the factory OEM headers, it would seem logical to be the first thing on our upgrade list including the Capristo brackets.
Stef, has an excellent write up illustrated with step by step pictures.
I would advice you not to rush, and see if you can find an F430 with aftermarket headers to listen to and be driven in.
Lets not forget that Ferrari spend a lot of time fine tuning their cars to create that specific "Ferrari" sound that other manufactures are jealous of, so really we don't want to spoil that, but amplify it a little more.
I am away in Cyprus at the moment but when I get back, I will see if I can post a short sound clip of my car.
I also believe that Stef, has a sound clip of his in one of his threats.