Ninemeister Cylinder Heads
11-15-2007, 10:43 AM
#91
11-15-2007, 12:00 PM
#92
Drifting
Marlon,
Speaking as a guy who has both the DACH-X (with 200 cell metal cats) and a rennsport chip, I can tell you that the difference is qualitative (beautiful sound, throttle response) more than quantitative (ie. butt dyno). If you're looking for hp, you're stuck with 3 choices:
1) supercharger
2) buy a tt
3) spend a lot of $$ on a creative NA rebuild
Speaking as a guy who has both the DACH-X (with 200 cell metal cats) and a rennsport chip, I can tell you that the difference is qualitative (beautiful sound, throttle response) more than quantitative (ie. butt dyno). If you're looking for hp, you're stuck with 3 choices:
1) supercharger
2) buy a tt
3) spend a lot of $$ on a creative NA rebuild
11-15-2007, 12:05 PM
#93
Rennlist Member
11-15-2007, 12:12 PM
#94
Weathergirl
Rennlist Member
Rennlist Member
Marlon, you should read this thread: https://rennlist.com/forums/993-forum/292420-100-cel-cat-question.html
in particular, Colin's post here: https://rennlist.com/forums/showpost...8&postcount=65
It's interesting that Colin says that mufflers don't affect power a bit, but split 100 cell cats are essential.
in particular, Colin's post here: https://rennlist.com/forums/showpost...8&postcount=65
It's interesting that Colin says that mufflers don't affect power a bit, but split 100 cell cats are essential.
11-15-2007, 12:22 PM
#95
Drifting
Rally - Thanks very much! However I mentioned the mufflers from a 'noise' perspective only. Don;t want to be too loud. I used to swap a test pipe back & forth on my SC's and 3.2 and it was pretty amazing the deeper tone w/o the cat. If I go to a Dach X I'm thinking about NOT doing the LPMM mod.
Marlon, you should read this thread: https://rennlist.com/forums/showthread.php?t=292420
in particular, Colin's post here: https://rennlist.com/forums/showpost...8&postcount=65
It's interesting that Colin says that mufflers don't affect power a bit, but split 100 cell cats are essential.
in particular, Colin's post here: https://rennlist.com/forums/showpost...8&postcount=65
It's interesting that Colin says that mufflers don't affect power a bit, but split 100 cell cats are essential.
11-15-2007, 12:29 PM
#97
Noodle Jr.
Rennlist Member
Rennlist Member
I already have the Rennsport chip so what will the cats add? Also I see there are 100 cell, 200 cell with 100 being less restrictive I take it? Will I pass emissions with either of these?
11-15-2007, 08:06 PM
#98
Addict
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So for a 'street only' 993, wonder if a tangible Tq gain in a suitable, street- RPM region could be gained from only:
1. Remap Motronic
2. 100 cell Cats
4. Billet heads
Or would the result be too 'weak' to justify cost and aggravation? Could 200 cell cats (DachX) be used instead? Or does it make more sense to merely go with a Steve Weiner chip & Dach X? Or maybe a chip & Dach X followed by heads later??? Seems like even a stock 993 would have the brakes and suspension to accomodate another 15-20 ft lbs. But given the trend & cost of benzine lately it might not make any sense at all. And the beat goes on...
1. Remap Motronic
2. 100 cell Cats
4. Billet heads
Or would the result be too 'weak' to justify cost and aggravation? Could 200 cell cats (DachX) be used instead? Or does it make more sense to merely go with a Steve Weiner chip & Dach X? Or maybe a chip & Dach X followed by heads later??? Seems like even a stock 993 would have the brakes and suspension to accomodate another 15-20 ft lbs. But given the trend & cost of benzine lately it might not make any sense at all. And the beat goes on...
To date we have not tried our heads with standard cams but my guess is that with the compromise of 993RS cams you would lose around 15hp and be around the 330-340hp level.
You also mentioned the cost of fuel. Robin Page, who had the first 9m Varioram billet/cam/cat/remap package, reported a 10% reduction (improvement) in fuel consumption following his engine conversion - which was significant for him as he was doing around 500 miles a week at that time. Incidentally this car was converted 2 years ago and to date other than routine maintainence we have not touched the engine.
