Can I run a stock ECU with these mods?
 

Hi all,
I recently purchased a stock 93 FD with 23K miles and in mint condition. I am in the process of adding the following mods: GReddy FMIC, GReddy Airinx Dual intake, Koyo radiator, aluminum AST, HKS Downpipe, Tanabe Super Medallion Hyper Spec Cat-Back exhaust, silcone hose replacement. Question 1. I need to get an A/F meter. Does anyone have any recommendation on one and where I can buy one? Question 2. I'm concerned about running to lean with these mods. I spoke to Tri-point Engineering who says yes, and are pushing the AEM computer. Intense Motorsports on the other hand, is saying these mods are fine with the stock ECU as long as I don't add a midpipe. Anyone know who's right? Or should I just hook up the A/F meter and see what's happening?
The car will be used mainly used as a daily driver for long highway commutes and I am concerned with longevity of the engine/turbos. Any thoughts? Thanks.
Tony

That's correct, long as you keep the boost at 10psi, you should be fine. Read this post about boost control:
https://www.rx7club.com/showthread.p...hreadid=242324

You don't really need an A/F meter until you have something that's adjustable (ie a fuel controller or standalone ecu). If you just want to check your A/F to be sure everything is safe, have it dyno'd.

If you really want an A/F meter, the LM-1 from http://www.innovatemotorsports.com is tough to beat. You will not find a cheaper wideband meter. It hasn't been out long, but all reports show that it's very accurate.

Thanks Andrew.