34:1 Afr?!

[maddog]

Please tell us more about your setup. I'm sure it can be done with camshaft and head mods with tuning and a high output ignition. Do you have any links on the web for 30:1 setups.
I'd be happy with a nice running 20:1 which I am working towards.

ATM I am chasing DENSO C60 or DENSO UC 12 hole injectors as they are meant to be the best atomising fuel injectors on the market. Apparently the US Toyota Camry uses them but not avail aftermarket. If anyone can enlighten me on these injectors please do.

[maxc]

Originally Posted by maddog

Please tell us more about your setup. I'm sure it can be done with camshaft and head mods with tuning and a high output ignition. Do you have any links on the web for 30:1 setups.
I'd be happy with a nice running 20:1 which I am working towards.

ATM I am chasing DENSO C60 or DENSO UC 12 hole injectors as they are meant to be the best atomising fuel injectors on the market. Apparently the US Toyota Camry uses them but not avail aftermarket. If anyone can enlighten me on these injectors please do.

I just run fuel into a catalytic converter. Heat the out side of the converter to help "crack" the fuel. The only problem you come across is that your exhaust temps are cut by about half. So then how do you heat the fuel to say 500F too 800F in the first place? I know how to solve that problem without "of coarse" breaking the rules of thermodynamics.
I built the unit 3 years ago and put in on my 70 cougar. Its illegal to have it on a newer emissions car. But I lost my job don't have any money to finish it.
Mark

[BLK98MK8LSC]

Originally Posted by maddog

Please tell us more about your setup. I'm sure it can be done with camshaft and head mods with tuning and a high output ignition. Do you have any links on the web for 30:1 setups.
I'd be happy with a nice running 20:1 which I am working towards.

ATM I am chasing DENSO C60 or DENSO UC 12 hole injectors as they are meant to be the best atomising fuel injectors on the market. Apparently the US Toyota Camry uses them but not avail aftermarket. If anyone can enlighten me on these injectors please do.

The ford 2.3 duratec PZEV engine uses the 12 hole denso injector as well. Honda is using them in some of their injected motorcycles . Apparently there is some kind of confidentiality agreement between denso and the OEMs that prevents us from getting ANY of the specs on them.

[rookie]

In 1999, DENSO introduced the world’s first 12-hole (opening) fuel injector (C60) – successfully reducing the atomized particle size to 65 µm.

DENSO Automotive OEM Products

DENSO C60 or DENSO UC 12 hole injectors - Live Search

[BLK98MK8LSC]

DENSO Aftermarket: Contact DRM Undercover Investigation Firm in Los Angeles California - Automobile Car Parts Jaguar also has used the 12 hole denso injector. Maybe some information can be gotten from JAG or FORD.

[THE CREW CHIEF]

Originally Posted by maxc

I just run fuel into a catalytic converter. Heat the out side of the converter to help "crack" the fuel. The only problem you come across is that your exhaust temps are cut by about half. So then how do you heat the fuel to say 500F too 800F in the first place? I know how to solve that problem without "of coarse" breaking the rules of thermodynamics.
I built the unit 3 years ago and put in on my 70 cougar. Its illegal to have it on a newer emissions car. But I lost my job don't have any money to finish it.
Mark

I am new here so don't beat me up to badly.
My question is.
How can you have an AFR of 30 to 1 and have EGT's that are cut in half?
Am I reading this right???

[Pinhead]

Originally Posted by maxc

I just run fuel into a catalytic converter. Heat the out side of the converter to help "crack" the fuel. The only problem you come across is that your exhaust temps are cut by about half. So then how do you heat the fuel to say 500F too 800F in the first place? I know how to solve that problem without "of coarse" breaking the rules of thermodynamics.
I built the unit 3 years ago and put in on my 70 cougar. Its illegal to have it on a newer emissions car. But I lost my job don't have any money to finish it.
Mark

So basically you need a catalytic converter inside the exhaust, that conditions the fuel before ignition... Ever hear of the GEET or PICC??

[automotivebreath]

Originally Posted by THE CREW CHIEF

How can you have an AFR of 30 to 1 and have EGT's that are cut in half?

Half the fuel means half the (heat) energy to be released. The key is to accomplish
fast efficient release of the energy at the lean air/fuel ratio, that can be quite a
challenge. If the fuel is still burning when the exahust valve opens, the engine will
be way down on power and EGT's may very well be up.

[THE CREW CHIEF]

Originally Posted by automotivebreath

Half the fuel means half the (heat) energy to be released. The key is to accomplish
fast efficient release of the energy at the lean air/fuel ratio, that can be quite a
challenge. If the fuel is still burning when the exahust valve opens, the engine will
be way down on power and EGT's may very well be up.

About twenty five years ago all we had was EGT's.
We would lean the carb out until it hit 1,350 F for circle track and about 1,450 F for drag applications.
Whenever you take fuel away it's going to get hot very quickly.

[automotivebreath]

Originally Posted by THE CREW CHIEF

About twenty five years ago all we had was EGT's. We would lean the carb out until
it hit 1,350 F for circle track and about 1,450 F for drag applications.Whenever you
take fuel away it's going to get hot very quickly.

You were likely going from a rich condition to something closer to stoich. This results
in an increase in flame temperature. In contrast going from stoich to 30:1 will reduce
flame temperature substantially.

Changing air fuel ratio can change the combustion rate. Slower flame rates
can result in an increase in post flame reactions with higher EGTs