Just wondering why Honda does not advance the timing a few degrees if it improves a little HP and does not hurt the engine? (94 vtec) If there are no major engine issues, why not send all Honda's out with a slight advance?
2nd: What does modified Injectors/Fuel rail/Fuel regulator have to do with performance? If you have a V-afc, you are actually leaning out the percentage of fuel that goes into each cylinder. (Right?)

 

with the vafc you can lean it out or make the engine run rich. as well as set when vtec kicks in and when it cuts off when you decelerate.


[Modified by cecknight, 10:45 PM 9/17/2002]

 

1) advanced timing will mean higher oct gas needed. 91/92 is pricey enough.

2) an engine needs 2 things to make power: air and fuel. those u've mentioned obviously provide more fuel to the engine. this is one necessity to make more power.

 

Imagine you’re an engineer for Honda
Y would U want to advance the timing?
1. Higher max pressure in your combustion chamber can mean more HP.
2. The combustion occurs later in the up stroke of your piston can = more HP.

Y would U would NOT want to advance the timing?
1. higher pressure in your combustion chamber, thus harder on the engine and possible ping (bad)
2. The time from the start of combustion to the time when the exhaust valves opens is less, thus less time to burn fuel. (Bad for emissions, & Fuel efficiency).

Now U weight the good and the bad then tune in the timing. This is what Honda did, and they are not far off from optimal IMO. If your going to do anything advance it by no more than 3 deg. This should still be safe for the engine and might give U a small gain. Dyno would be the only way to know for sure how much it helped or didn't help.

 

not all areas will have 91/92 octane Gas. Also, even if they do, certain gases have different by products whci may cause pinging with the more advanced timing. Might as well keep a safe margin of error for .

 

93 octane ownz

 

Thanks for the information! I'm not too much of an "true" mechanic and am still learning the Vtec engine, etc...

In Cali, (Bay Area) we only have 91 Octane. I know HI has 92, just came back from vacation...

 

94 octane here in IL