Quote:
Originally Posted by Davis
Hmmm I guess my logic is flawed then. I thought, if I had a less restrictive exhaust, the better flowing intake would give larger gains over stock.  |
That's what I used to think as well, until practical application proved me wrong. If you install a good CAI you will see a nice increase in HP. If you then tune it you will get a nice little bump. Then you install headers and you should see a minimal gain in HP. Another tune after the header install is really not worth the money IMO. If you reverse the process and install the headers first you will see a nice increase in HP, probably double what you saw when you installed the headers last. Again this is just my experience with performance parts and so far as my Camaro it is holding true. I first tuned the car, then went with a cat-back (no tune required), then went with headers (tune required for CEL only). Next will be the Vararam which will require a tune, according to Vararam, on either product for maximum performance. Otherwise I doubt I would see a huge benefit to re-tune again. These ECM's take advantage of the additional flow you give them on their own to a point. Once you set the AFR where you want it and bump up the timing, the ECM will do the rest for you.
If really want to know your total HP gain v's going to a dyno multiple times...do a baseline, then add all your after-market parts, then get a
GOOD tune on the same dyno same conditions.