Re: 3" downpipe with cat 13-18hp gains on stock 9-3 - Saab Performance Bulletin Board - Saabnet.com
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Re: 3" downpipe with cat 13-18hp gains on stock 9-3
Posted by 95power (more from 95power) on Fri, 10 Dec 2004 06:08:36
In Reply to: 3" downpipe with cat 13-18hp gains on stock 9-3, ckpaden, Tue, 7 Dec 2004 13:14:52
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A/F ratios are worse in the upper range with your downpipe. With these A/F ratios it's very important to check EGT values as well. Did you check these compared to std ones ?
It is usually very dangerous to draw general conclusions based on ONE dyno measurement with ONE T7 car. There are too many variable things here, like that it's 5 MONTHS between these two dyno runs ! Was car droven at all in that time period ? Maybe there was some problems with std downpipe / cat in that specific car, and your downpipe just fixed those ?
It's also possible, that the first dyno run was measured after just after trionic calibration and the second one with calibrated one.
What I'm saying, is, that you are using these dyno graphs for making some money. In this case it is important to gather much more information ( better documentation of dyno runs, conditions, EGT:s, runs with multiple cars etc.) than you presented here - especially when we are talking about T7 car with HW changes without SW changes - when using them as selling arguments. In T7 air mass is fixed for max bhp output, and you did not change it ( no mods with T7 maps ).
It's also quite strange that you are the only tuner who has realised that T7 cars do not need SW mods when making HW mods...Usually it seems that those who have done HW mods in their T7 cars ( without SW mods ), have got very case dependent results ( yes, I have many seriously tuning oriented friends with T7 cars ). This makes it even more important to make several runs with several T7 cars BEFORE CLAIMING that by using your downpipe one will get extra bhp:s.
Waiting for your response.
posted by 130.234.178...
Posts in this Thread:
- 3" downpipe with cat 13-18hp gains on stock 9-3, ckpaden, Tue, 7 Dec 2004 13:14:52
- Re: 3" downpipe with cat 13-18hp gains on stock 9-3, 95power, Fri, 10 Dec 2004 06:08:36 <-- Viewing This Message
- Yet another source of abbreviation confusion....., MI-Roger
, Sat, 11 Dec 2004 16:03:53 - Re: 3" downpipe with cat 13-18hp gains on stock 9-3, Eric, Sat, 11 Dec 2004 08:46:46
- Could you post the OBD sheet, Vigge, Sat, 11 Dec 2004 12:24:13
- MAF, Eric, Mon, 13 Dec 2004 14:12:25
- Re: MAF, Adrian W, Fri, 17 Dec 2004 01:22:32
- Re: MAF, Adrian W, Fri, 17 Dec 2004 01:29:40
- Do you have the values for stock HW? nm, Vigge, Tue, 14 Dec 2004 12:09:39
- One more favour, Vigge, Mon, 13 Dec 2004 20:13:50
- Boost Compare, Eric, Mon, 13 Dec 2004 14:10:49
- I agree w/you and Vigge....., zeke, Fri, 10 Dec 2004 09:42:44
- A/F too lean?, Vigge, Thu, 9 Dec 2004 10:18:28
- does it bolt, adam
, Wed, 8 Dec 2004 04:36:36 - dyno numbers w/ a 2.0-T5, 2.0-T7, or a 2.3-T7?, perkj, Tue, 7 Dec 2004 17:06:05
- Done with a 2000 9-3 Base T7, n/m, Eric, Tue, 7 Dec 2004 17:14:51
- What does this equate to at the crank?, bb vign, Wed, 8 Dec 2004 09:57:27
- woohoo!! T7s can see hp gains w/o software updates! =), perkj, Tue, 7 Dec 2004 17:37:04
- Yes they can :-), ckpaden, Tue, 7 Dec 2004 18:05:47
- I have a Viggen you can try it on :-), pvanosta, Thu, 9 Dec 2004 07:37:49
- how do you think it would affect T5 cars?, dip, Wed, 8 Dec 2004 10:55:53
- damn...., perkj, Tue, 7 Dec 2004 19:14:22
- Re: Yes they can :-), GM, Tue, 7 Dec 2004 18:53:36
- Good job! Nice to see numbers on this variable...., zeke, Tue, 7 Dec 2004 13:27:58
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