Hondata

So it says here http://www.hondata.com/reflash_05rsx.html
that this flash is not recommend with a rh.

Now where in the rpm band does she run lean with a RH?
Is running my stock cat-back in my favor with a RH/Reflash combo?

Alot of us RH owners are totally stoked about this flash.

Generally the race headers run leaner from 6000 rpm upwards. The exact difference varies with each header.

So does the the 02-04 with a RH and flash I thought?

The 02-04 and 05+ all run lean with a race header regardless of flash vs stock ecu program. People still do it however. A better question would be 'how lean' for 'how long' and does running the reflashes increase the chance of engine damage when leaning out.

Wayne

Okay, "How Lean" for "How Long"?

Also how would running 93 octane or 94 octane effect this?

1. Any reflash, either the 02-04 or 05 has at least as much fuel as the stock ECU, so there is the same or less risk of running lean with a reflash as with the stock ECU.

2. Most 02-04 reflashes are fine with an exhaust header. Some run lean. We're being conservative with our recommendations with the 05 reflash so that there is little chance of anyone running lean.

3. In any case we recommend the KPro once you replace the cat because otherwise you'll a check engine light. Don't even mention o2 simulators because they cause a lot of problems.

4. You would have the run the engine really lean for a long time to do any damage.

Thank you very much!

I'll being purchasing the reflash shortly

I have read all the info. on the '05 reflash and have this question:
Is there any problems with running the stock exhaust? I already have the IMG and CAI. I realize that the "full potential" may not be achieved, but there is no mention anywhere about use of the stock exhaust.

No problem running the stock exhaust.

Say I have the Reflash & I get V-AFC to add fuel to where its lean. Will that work?

05DC5 wrote:Say I have the Reflash & I get V-AFC to add fuel to where its lean. Will that work?

I do not work at hondata.

It might work, but I would highly suggest you not do it. Remember that a afc device adds/removes fuel by TRICKING the engine computer into thinking there is more or less load (map sensor) to tune fuel. When the engine detects a change in load, it can add/remove ignition. You will be potentially modifying the amount of ignition you are running by tuning fuel with an afc device. If you remove fuel you will be adding ignition, and if you add fuel, you will be removing ignition (in the general case).

If you think that you need to tune fuel, go with a kpro.

Wayne

With RH running a little lean already, would running a test pipe be as lean of RH?

05DC5 wrote:With RH running a little lean already, would running a test pipe be as lean of RH?

I'm confused. I don't know what you're asking. Do you mean running a shorty header with a test pipe from the shorty to the catback flange?

Razathorn wrote:

05DC5 wrote:With RH running a little lean already, would running a test pipe be as lean of RH?

I'm confused. I don't know what you're asking. Do you mean running a shorty header with a test pipe from the shorty to the catback flange?

Ya my bad, a shorty header with a test pipe.

05DC5 wrote:

Razathorn wrote:

05DC5 wrote:With RH running a little lean already, would running a test pipe be as lean of RH?

I'm confused. I don't know what you're asking. Do you mean running a shorty header with a test pipe from the shorty to the catback flange?

Ya my bad, a shorty header with a test pipe.

I do not work at hondata.

Personally, I don't think a removed cat will get you anywhere near as lean as a race header would -- however, I have never seen it done so I can't speak with authority on it. A race header is much more of a change than a test pipe alone. Gutting / replacing a cat with a test pipe is much like getting a less restrictive catback system in my opinion. I could be wrong about that, and furthermore, I don't know of anyone who has just 'gone with a test pipe' and a shorty. What's the point of getting rid of your cat and not replacing that big tube with actual runners on a real header for building power?

In my opinion, you should leave your cat there and run the reflash, or get a race header and run a kpro with a nice dyno tune for your setup. If you've removed the cat, you've already made your car emissions illegal, might as well go all the way and actually get some power from it. Removing the cat alone isn't going to do much for you in terms of power. It will make your car unjustifiably stinky however.

Wayne