| DARK1 |
11-13-2017 08:08 PM |
I realize this is an old thread but when ever I want good info on my Blazer I search the BF first. It just so happens I will prolly be replacing the 4.3 in my 96 soon. The last time I replaced a V-6 was 30 yrs ago. That was a 1972 Mercury Capri. Back then I figured if it was out on an engine stand why not do the stuff that's miserable to do when it's in the vehicle. Freeze plugs sure, But how about some power. I consulted Crane Cams nearby in South FL and they came up with a simply to install performance model for me. I also added headers, dual exhaust and free flow mufflers. It had a lot of get up and go but not much more than stock but those pipes sounded GREAT! Then one night I was driving home from work and another Capri pulled along side to enjoy the sound of my pipes. The car had 5 kids younger than me inside. I waved at them and they bolted away from me like a sling shot without much noise. Turns out it was a 4 cyl with a turbo - FACTORY
A mechanic friend explained all about necessary back pressure on small engines and that the turbo was designed to multiply it's power with it's own exhaust. In my case "open pipes was not the answer." With this little Chevy I already got cut out the rusted out Cat and the clogged up muffler and put in a free flow Dynomax muffler in a nice smooth line. The pipes sound great and seem to actually boost the power a little. If the best answer for maximum blast off is gonna be a cam; I night as well do it now while the motor is out. '96 was the first year of the OBD II CAN so If I can tune it and "Flash the Computer" for equal of better results I would like to go that route. My muffler guy put in what he called a "Bong" to space my O2 sensor after the cat to fool it but my check engine light has been on since. I smell raw fuel often too. I hear that may be an EGR issue but don't understand how that works.
If my post boosts this back up to 2017, maybe somebody here will know just the recipe. I am wide open to ideas. Thanx
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