Twilightoptics

I've seen cold air's made with the Vortech Elbow (spendy), Impala SS Elbow (hard to find), and the factory Firebird TPI elbow.

Right now, my factory TPI setup (no maf) is costing me 7HP on the dyno. And that's sucking warm air. (Filters may have a bit to do with the HP gain, K&N).

My question is, which elbow flows best? Will the firebird elbow flow better than the TPI hardshell over the radiator?

Where can I get a Throttle Body > 3.5" pipe rubber adapter? I may end up using a 3.5" mandrel bend if I can find the rubber coupler.

I found a 3.5" > 3.5" one for $27 on summit, but I don't know that it would fit around the Throttle Body. (58mm Holley).

Any help would be great, thanks.

The stealthram stress has torn my factory tpi bellows.

-Paul

1989GTATransAm

iTrader: (3)

You are right. We found out the same thing with the dyno session we had this past Saturday. The restiction on the Camaro where it goes from flat to round is costing 7 HP.

We had a stock inlet and one that had been modifed to open up the inlet at that point to 3 inches. The difference was the 7HP that you found.

I would imagine the same could be said of a MAF and a straight through pipe. Because the internal diameter of the MAF is about the same or less than the restiction on the Camaro inlet. So IMHO there is power to be gained by going to SD. I'm still running MAF and making good power but will be converting early next year.

Twilightoptics

Never did try the intake removal on my buddies '89 GTA AFR383... puts 360 something on the ground through a MAF. Wonder what he'll gain when he get the wiring for the Commander 950...