2003-04 Mach 1 Registry Owners Club - View Single Post

03BlkMachOne · 07-05-2004, 02:08 PM

Oh I got that. I just wanted to point out they also mentioned the cat back alone would cause a lower rpm loss. That was my point, but I guess I did not state it well. Sorry about that.

My A/F was pretty much 12.5 after 2300 rpm and hit a low of 11.9 at one point before holding at 12.5. Since this does not indicate a lean condition, I have to attribute the loss solely to the cat back flow design since it did not lean out the engine. I guess only the combo would do that, or would a CAI alone do that?

My question to you and everyone is: What is the best way to get the low end power back w/o going back to the stock cat back? I am new to EFI and computer controlled engines, so I need some suggestions.

Thanks

07-05-2004, 02:08 PM	#9
03BlkMachOne Registered User Join Date: Oct 2003 Location: Back in Bixby OK (Tulsa area) Posts: 624	Oh I got that. I just wanted to point out they also mentioned the cat back alone would cause a lower rpm loss. That was my point, but I guess I did not state it well. Sorry about that. My A/F was pretty much 12.5 after 2300 rpm and hit a low of 11.9 at one point before holding at 12.5. Since this does not indicate a lean condition, I have to attribute the loss solely to the cat back flow design since it did not lean out the engine. I guess only the combo would do that, or would a CAI alone do that? My question to you and everyone is: What is the best way to get the low end power back w/o going back to the stock cat back? I am new to EFI and computer controlled engines, so I need some suggestions. Thanks __________________ James Russell - Over 55 - GROWING OLDER IS MANDATORY. GROWING UP IS OPTIONAL. LAUGHING AT YOURSELF IS THERAPEUTIC! 100% stock dyno (11/29/03, 2K miles) - 274.4HP - 303.4TQ - A/F 12.2 - 13.2 Switched to Mobil 1 (02/07/04, 4K miles) - 272.0HP - 307.9TQ - A/F 12.0 Oasis date - 7/21/03 Glove box date - 7/16/03 New Magnapacks - 07/01/04 (7800 miles) 281.3HP - 302.2TQ - A/F 12.5