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Fast Intentions exhaust and header comparison. Before and after UPRev tune (Dyno)

Originally Posted by sylenze I actually think that UpRev can tune more than AFR...considering Stillen is using UpRev for the tune of their supercharger, shouldnt that mean they have figured

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Old 03-31-2010, 11:14 AM   #1 (permalink)
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Originally Posted by sylenze View Post
I actually think that UpRev can tune more than AFR...considering Stillen is using UpRev for the tune of their supercharger, shouldnt that mean they have figured out a way to manage all the other stuff... unless the tune coming with the stillen supercharger is actually only tuning the AFR....
fyi - I'm having my wife's car tuned this week with UpRev (same mods - FI CBE, 18"resonators, HFC's, CF Mufflers, Stillenn GenIII) - the tuner claims he can adjust timing - I will post for comparison to the SpecialtyZ tune that Tony provided. One map will be 100 octane - btw since there is pure race gas in the tank right now.
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Old 03-31-2010, 12:02 PM   #2 (permalink)
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Originally Posted by u155282 View Post
I love the sound of the LTHs and the performance bump is great, but what if I wanted to keep it smog legal and a little quieter than straight pipes? I know it be expensive and it would negate some of the gains from the LTHs, but what about cutting out some space and welding in a pair of HFCs? Totally not worth it? Would you see any gains from having LTHs in that case? Has anybody else thought about this?

I still don't have a car, just curious/dreaming. I'm that guy - sorry.
I mentioned this in the other FI LTH thread. Most of the 90's and back cars had the cats after the header/down pipe. That may not pass the cold start smog requirments now-a-days but having like a 200 cell cat after the long tubes I would think would cut down the raw fuel smell and get you by a quick visual. I know this would necessitate a revised mid-pipe but keep it mind for later Tony. It might keep cops and Highway Patrol from rolling you not to mention the possible smell at stop lights. Not sure how that would impact the #'s though.

Last edited by G Fo12ce; 03-31-2010 at 12:04 PM.
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