My current mods are listed in my signature. I'm going to be adding a 10.5 hotside and a ported/coated stock manifold, and I have some questions:

(1) Will I need a retune?

(2) I'm keeping the O2 housing stock, because of all of the boost creep problems I'm hearing about, is this going to limit the effectiveness of the 10.5 and manifold?

(3) I'm hoping to gain at least 10 whp (preferably more). Is this realistic?

 

Yes, using the stock manifold will limit the gains of the ported manifold. Def look into getting an O2 housing to go with that setup. With it, you will be looking at 20+whp gains!

 

Hmmm, this is most definitely a cyclical argument, right?

 

Do you mean using the stock O2 will limit the gains of the ported manifold?

 

Yes, sorry I meant using the stock O2 sensor housing will limit the gains from the ported exhaust manifold My bad!

 

Anyone else? What about a retune?

 

I just did exactly what you are describing. Added an O2 housing, ported manifold, and 10.5 hotside and my tune was way out of whack. Might as well get a retune as it will maximize your gains.

 

Agreed in your case, but I'm going to keep the O2 housing stock.