Well I put on my intake today, is it me or can you really feel the difference by doing the intake. I have BB Bullets on there and the only thing I have left is the Headers. (for now ) I noticed a bit of power difference by now having two mods done any thoughts

 

Take a look at my sig. That's the power increase I benefited from by swapping out my intake and exhaust. If you haven't already, I recommend that you either get cold air in from underneath (see my cold air mod) or from the front by coring out the fog light covers. The reduction in intake air temperature will be dramatic during slow-moving conditions. I measured (using a Car Chip data-logging unit) a 40 degree F reduction in intake air temps after doing the mod. This means that the ECU doesn't have to retard timing to prevent pinging, saving you from losing 10+ HP.

 

So if you don't add the cold air scoop you will lose HP? I don't quite understand.

 

You start with full-HP at intake temps under approx. 110 degreesF. If you were to take a cruise on a sparsely-populated highway (70-degree day), your intake air temperature would remain at just above ambient temp.

Okay, now let's say you take a ride to a populated area of town and encounter traffic lights and slow-moving traffic. Your intake air temperature on a 70-80 degree day (and possibly on cooler days) would steadily climb to 140 degrees F or more. As this temperature heads past 110 degrees, your ECU starts to retard ignition timing to prevent predetonation (pinging). By the time intake air temperature reaches 140F, your engine horsepower potential is down by 10 HP.

The older, non-computer controlled cars would be tuned by alternately advancing ignition timing, taking the car out for an aggressive spin, listening for pinging, and if none was heard, the timing would be advanced a little bit more. This was repeated until the engine would ping. The timing was then retarded (distributor rotated) back to the last position and the car was all set for THOSE temperature conditions. If the ambient temps climbed, the engine could still ping, so the settings were compromises.
Today, your C5's ECU takes intake flow and temperature data, along with many other input to keep the air/fuel ratio optimal and prevent engine damage.

Even a Lexus RX400h has a cold air passage that directs outside air at the intake filter. It does make a significant difference, especially when the underhood temps climb.

 

Thanks for all of your help, do you have headers on your vette? I do notice the power difference with the intake and Bullet exhaust is it worth while adding the headers?

 

I can't have long tube headers here in California, but if I could, I would have them. LT headers can add over 20 HP with a dyno-tune, although high-quality headers are fairly expensive.

Dave

 

I have a 2002 Z06. Late last fall I installed 1 3/4 AR LT headers and X pipe with high flow cats. Kept my stock (Z06) TI mufflers. Installed the new Halltech Venom CAI this spring and the car was tuned. All I can say is wow.....what a noticable difference! The bigest performance bump was the headers. The intake did help though. (all seat of the pants observations at this time)
Taking it to the dyno in a couple of weeks to see what kind of numbers I'm getting.
I highly recommend the LT headers....you'll be quite happy with the results.
(You'll scare the neighbors with the B&B Bullets and headers combo!!!)
Good luck.
Silverbird

 

Thanks for the info