Stoich Tuning

**zanch** · December 13th, 2008 06:55 AM

I've heard about this type of tuning years ago. There was a group who were stoich tuned and was the talk in forums. I believe this was specialized by LF Tuning. Any comments on this method?

**niky** · December 13th, 2008 12:59 PM

Stoich tuning merely means tuning your car so that it neither runs lean or rich. How this is done, depends on your car... is it carburated or EFI?

**ghosthunter** · December 13th, 2008 01:04 PM

Originally Posted by zanch

I've heard about this type of tuning years ago. There was a group who were stoich tuned and was the talk in forums. I believe this was specialized by LF Tuning. Any comments on this method?

It was made obsolete by the arrival of dyno tuning which is more precise.

**non-vtec** · December 13th, 2008 01:10 PM

is stoich tuning same as tuning with a fuel controller?

**zanch** · December 13th, 2008 01:29 PM

Originally Posted by niky

Stoich tuning merely means tuning your car so that it neither runs lean or rich. How this is done, depends on your car... is it carburated or EFI?

EFI paps..

**ghosthunter** · December 13th, 2008 03:16 PM

Originally Posted by non-vtec

is stoich tuning same as tuning with a fuel controller?

nope... even fully stock car will "benefit" from stoich tuning daw. Leave the car overnight LF and he will do his magic by the next day.

**dennis powell** · December 13th, 2008 05:20 PM

stoichiometric ratio is tuned by a car module itself based in engine size and displacements and depend on manufacturer program but normally 14:1 air fuel ratio.in reality stoich tuning is similar to tune up in terms of service.but their stoich tuning is different,they going to install or add something to get better gas mileage,yes its a little advantage for the vehicles owner but a big disadvantges for the engine.no offense.

**zanch** · December 14th, 2008 02:55 PM

Does this mean we are adding stress to the engine if not properly tuned using the stoich method? From what i know "tope" would occur if the engine isn't "stoich tuned" well.

**niky** · December 15th, 2008 09:05 PM

If it's improperly tuned, it could run lean, leading to eventual long-term damage and "tope".

If you've got an EFI engine, it's best to go with an air-fuel controller and dyno-tuning. Big difference in power. The difference in economy will depend on how bad your fuel tuning was as stock. If your EFI car comes with an oxygen sensor already, the difference in economy won't be that big, though.