I plan on getting a stealth ram soon and was wondering if my car would still run correctly without the EGR system since the stealth ram does not have one, and the with the fact that I have a stock chip?

thanks
Tim

 

It will likely Give you a Code 42. It will Run fine however.

If you want to get rid of the code, checkout the link in my Sig

 

Or buy your own prom burning equipment for a grand total of $150



The problem with disabling egr and not burning a prom is the timing takes EGR into consideration meaning it runs more of it, if you have it disabled you will likely, or at least possibly run into problems with knock.

 

EGR will be the least of your concerns if you try running a stock chip with a stealth ram.

 

Well Jim, I have done alright thus far with the stock chip. As far as my own burning equipment, I will get it sometime, but it is not high on my list right now. Thanks anyway

Tim

 

You may be doing just fine, but the stock chip is such a mismatch for a stealth ram setup that I really don't think that the EGR should be your primary concern. The EGR not functioning is not nearly as significant as the PROM when it comes to having your motor function properly.

 

So Jim, what are you saying about the stock chip not working with the HSR? I just ordered my HSR and have a Ed Wright stage 2 piggyback chip. My timing is set to factory specs. what problems will I have

 

I don't know that you'll have any specific "problems" per-se. Doug Flynn managed to gain 62hp over the stock TPI at whatever RPM with the stock chip on a 92 L98. I just think that the stealth ram is so far from the TPI setup, that you'll be miles away from optimum with any chip that's designed to work with the LTR setup. Do I know specifically what issues there will be? No. I would guess that you'll probably be grossly rich at some RPMs, and very lean at others. Maybe you'll be rich all the time, or lean all the time. I dunno. I'd guess that the characteristics of the stock programming will result in a rich condition at low rpms, and a lean condition at high rpms. The lean condition can also cause the computer to pull out a ton of timing to prevent detonation.

Will is be lean enough to be a potential danger? I don't know. I suspect that it could be.

If it turns out to be pig-rich at low rpms, tuning could help reclaim a lot of the power losses that you experience with the HSR with a stock chip. If it is pig-rich at low RPMs like I would suspect, it will also have no chance of passing a sniffer test. With or without EGR, the car isn't likely to pass a sniffer without a new chip.

Overall, how the car runs without an EGR valve is going to be a virtual non-issue when you consider how out of whack the stock chip is anyway.

 

Jim, thanks for the info. The thing with chip tuning is that inorder to get it right you eithe rhave to drive toa shop that does it or buy all the stuff and spend a while just learning it and goingback and forth to a dyno that is miles away.