Motorsportpartz or Tuningpros headers direct bolt on?, How much gains to expect with open air intake Options

[onnaj]

I'm about to buy this or this header to add a little more noise and a little more punch with a good look under the hood.

Will these be a direct bolt on? Will both the o2 sensors hook up or does my Celica 7afe only had 1 o2 sensor?

Thanks!

This post has been edited by onnaj: Dec 11, 2012 - 12:18 PM

[Smaay]

How did you advance ignition timing?

first off what year is your car?

if its pre 96 then look under the distributor for a bolt thats holding it. loosten the bolt that you can turn the distributor by hand. stick a wire in the diagnostic box jumpering Te and E1. the timing light should show you at 10 degrees BTDC. now turn the distributor clockwise and you will see the timing advance. running a 7A-FE at about 14-15 degrees BTDC will bake a huge change, however you must run a higher octane rating fuel.

[onnaj]

How did you advance ignition timing?

first off what year is your car?

if its pre 96 then look under the distributor for a bolt thats holding it. loosten the bolt that you can turn the distributor by hand. stick a wire in the diagnostic box jumpering Te and E1. the timing light should show you at 10 degrees BTDC. now turn the distributor clockwise and you will see the timing advance. running a 7A-FE at about 14-15 degrees BTDC will bake a huge change, however you must run a higher octane rating fuel.

I have a Europe 7AFE, it's from 1998, but still OBDI so the jumpering method should be it.
But to change the timing i always thought you have to turn the distributor cap, but thats not it, you have to turn the distribituor itself?!
Which is the minimum octane i should use when i advance the timing to 14 degress BTDC? Will it damage my engine anyway?

Thanks.