Contour Enthusiasts Group Archives Forums Modifications 3.0L Duratec 3L Running...Got a Few ?'s

Well this time it's official after a faulty Alternator, Rack & Pinion and a Broken Radiator (due to shop replacing the rack) the car seems to be running well.

I have a few concerns and I was hoping Tom or Greg could chime in. Greg I've read your write up on the MAF/Injector sizing, very thorough, but really I just need to know if I'm OK running the 24's N/A or is there a power benefit by going back to 19's (I've read someone here stating 19's may be a better choice N/A 3L on an SVT), I mean if there is a noticeable benefit by going back to 19's I will, if not that's even better.

The next is my exhaust. Would there be a difference in running either of these with my existing exhaust setup, 3" High-Flow Cat or a inline resonator (was thinking of Edelbrock RPM Series)? The purpose here being reducing drone/rasp/popping if possible and overall dB without affecting hp/tq and if any very minimal losses. Keith @streetflight reccomended a 3"Cat, I'm just finding other opinions.

The injectors will work fine as long as the MAF or chip is tuned for them. It's doubtful you'd see a gain or loss either way, it's just a matter of tuning for optimal performance with what you've got. If you aren't planning on tuning with a chip, then stick with the 24's. If you are, then it's an easy change over.

As far as the exhaust, I'd go with Keith's recommendations as I beleive he used to do something with flow dynamics for one of the big three.

Rick

Thanka Rick, by the way the engine purrs beautifully. I do currently have a Custom burned Street Flight Chip that Chris did for me but it needs some more fine tuning...