THIS is CHEAP

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Oct 18, 2003 | 01:44 PM

IS300

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Joined: Feb 2003

Posts: 240

From: CT

THIS is CHEAP

http://cgi.ebay.com/ebaymotors/ws/eB...tem=2436992448

what are your feelings on this. Yes, it is off of ebay and it looks cheap and its only $35. Has anyone tried this?

Oct 18, 2003 | 05:00 PM

Kevin M

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Posts: 18,369

From: Reno, NV

Car Info: 1993/2000/2001 GF4 mostly red

Quote:

Originally posted by some eBay scammer
Fuel/oxygen ratios in modern automobiles are regulated by an Electronic Control Unit(ECU). Factory ECUs are set to maintain a 14.7:1 Fuel/Oxygen ratio, this is known as a stoichometric fuel mix. This mix is a balance between power and fuel economy, which is what most automobile buyers are happy with. In general, leaning out the fuel/oxygen ratio will cause a power loss, but fuel economy gain, conversely richening the mix will cause a slight (usually less than 1/2 mpg) reduction in fuel economy, but an increase in power. The fuel/oxygen ratio must remain between 13:1 and 17:1 to remain efficient, any leaner and the engine will be starved for fuel, any richer and the engine will not be able to combust all of the fuel causing inefficiency. Performance chips and modules increase performance by adjusting these ratios between 13 and 14.7, the more performance oriented fuel curves.

That's a $35 dollar recipe for a blown motor. STOCK EJ20s are running well below 11.5:1 AFRs at the top of the torque curve. Leaning it out that far certainly makes more power, right up until you knock some holes in your pistons. At best, you'd get 15 seconds of glorious power until the ECU saw your EGTs and pulled all the timing it could and added more fuel to compensate.