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Re: So by your logic then
Posted by Jay Hassinger (more from Jay Hassinger) on Thu, 27 Dec 2001 10:50:50
In Reply to: Re: So by your logic then, Johann F, Thu, 27 Dec 2001 09:50:11
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If the Bosche FI is that "stupid" I'm shocked. In electronic engine management they program into the VE tables of the fuel maps the basics of the motor. I.E. 16 valve, X compression, cam specs, head flow rate etc etc.
They are designed to compensate for changes.
It would take a pretty major change to upset the VE to a margin that would adversly affect performance outside of maxing out the stock components. In other words tuning that would require 3D mapping for tip in, fuel vs rpm etc etc. But we are talking WOT so these requirements are pretty basic considering the only thing is changes is the fuel curve based on MAF input.
I've yet to see a hot wire MAF car that can't compensate for an exhaust upgrade. A MAP car yes, maybe, MAF car? Never seen it.
The real way to see how it is affecting your fuel curve is to get on a dyno with a wide band and pull. End of story.
The bottom line is there is improvement from ditching the cat which is what he asked.
This post was not ment to be a flame but I just can't swallow that the Bosche FI can't compensate for an exhaust upgrade. I'd have to see some hard imperical data to convince me otherwise.
posted by 24.18.134...
Posts in this Thread:
- Gutting a SPG cat, BuHuSPG, Wed, 26 Dec 2001 23:37:14
- So whats the verdict, BuHuSPG, Thu, 27 Dec 2001 23:35:00
- Re: Gutting a SPG cat, SDP, Thu, 27 Dec 2001 12:36:29
- remove it with the downpipe, dave n, Thu, 27 Dec 2001 06:43:01
- Re: remove it with the downpipe, Johann F, Thu, 27 Dec 2001 08:01:00
- So by your logic then, Jay Hassinger, Thu, 27 Dec 2001 08:47:30
- Re: So by your logic then, Johann F, Thu, 27 Dec 2001 09:50:11
- Re: So by your logic then, Jay Hassinger, Thu, 27 Dec 2001 10:50:50 <-- Viewing This Message
- no theory here., dave n, Thu, 27 Dec 2001 16:10:07
- Re: So by your logic then, Johann F, Thu, 27 Dec 2001 12:50:33
- Well some final thoughts, Jay Hassinger, Fri, 28 Dec 2001 07:58:52
- Agree- and some, SDP, Thu, 27 Dec 2001 20:28:51
- Dunno which FI system you're referring to... but,, bazil burns, Thu, 27 Dec 2001 15:26:46
- Re: Gutting a SPG cat, chrisx, Thu, 27 Dec 2001 04:09:34
- yes but just a few considerations, Quinn S. Kurz, Thu, 27 Dec 2001 01:51:26
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