Running Lean and Rich questions
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From: Louisville, Ky
Running Lean and Rich questions These are the mods I was planning. I need to know where I will stand after each of them with my a/f ratio.
I went to the dyno a year ago and I was running a little rich. I haven't done one power mod since..
1. Would porting my MAF and/or getting bigger ends lean me out a little? Which is better and why? SLP 85mm MAF or Home Port? Doesn't the SLP 85mm change the programming on top of the bigger size?
2. I also have the HPP3+ and was thinking about using it for the programming. All that does is make you leaner right? Can it make me too lean with the ported MAF/ENDS?
3. Then I heard Headers make you run rich? Is this true?
4. After the headers I figured a good LS6 intake would lean me out. Yes? No?
5. After all of these mods, would I benefit from a ported TB? I will be getting one for the heads/cam next April anyway so it's no big deal spending the money for the few hp but will it help for now?
6. And since it is winter, I was going to bypass the air conditioner. This is known as the 'short-belt mod' right? How much hp is that good for?
I know that this stuff together won't ad up nearly to what it would seperately because of the restrictive heads and cam not taking advantage of the extra air and fuel but what do you think I would pull after these mods? I pulled 331rwhp and 338rwtq with just a cutout and a lid, even had the stock filter in it with a crappy 2000 LS1 intake. No the dyno wasn't optimistic because others only pulled 306 with same mods on a auto. Thanks alot guys if you find the time to answer (If you even read this far. LOL)
I went to the dyno a year ago and I was running a little rich. I haven't done one power mod since..
1. Would porting my MAF and/or getting bigger ends lean me out a little? Which is better and why? SLP 85mm MAF or Home Port? Doesn't the SLP 85mm change the programming on top of the bigger size?
2. I also have the HPP3+ and was thinking about using it for the programming. All that does is make you leaner right? Can it make me too lean with the ported MAF/ENDS?
3. Then I heard Headers make you run rich? Is this true?
4. After the headers I figured a good LS6 intake would lean me out. Yes? No?
5. After all of these mods, would I benefit from a ported TB? I will be getting one for the heads/cam next April anyway so it's no big deal spending the money for the few hp but will it help for now?
6. And since it is winter, I was going to bypass the air conditioner. This is known as the 'short-belt mod' right? How much hp is that good for?
I know that this stuff together won't ad up nearly to what it would seperately because of the restrictive heads and cam not taking advantage of the extra air and fuel but what do you think I would pull after these mods? I pulled 331rwhp and 338rwtq with just a cutout and a lid, even had the stock filter in it with a crappy 2000 LS1 intake. No the dyno wasn't optimistic because others only pulled 306 with same mods on a auto. Thanks alot guys if you find the time to answer (If you even read this far. LOL)
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Joined: Nov 2001
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From: Williamsburg, VA
Re: Running Lean and Rich questions Ported MAF = lean
Headers = lean
HPP3 programing = lean
Lean 3, Rich 0
I don't think the LS6 intake contributes to rich/lean changes at all. The "crappy" 2000 LS1 intake is about the same as the LS6 if you don't have heads/cam/headers, etc.
<small>[ November 30, 2002, 11:01 PM: Message edited by: Brother J ]</small>
Headers = lean
HPP3 programing = lean
Lean 3, Rich 0
I don't think the LS6 intake contributes to rich/lean changes at all. The "crappy" 2000 LS1 intake is about the same as the LS6 if you don't have heads/cam/headers, etc.
<small>[ November 30, 2002, 11:01 PM: Message edited by: Brother J ]</small>
Re: Running Lean and Rich questions </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Brother J:
<strong>Ported MAF = lean
Headers = lean
HPP3 programing = lean
Lean 3, Rich 0
I don't think the LS6 intake contributes to rich/lean changes at all. The "crappy" 2000 LS1 intake is about the same as the LS6 if you don't have heads/cam/headers, etc.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Actually its a rare occasion for headers to make an engine run lean. The majority of the time LT's will cause a car to run pig rich.
<strong>Ported MAF = lean
Headers = lean
HPP3 programing = lean
Lean 3, Rich 0
I don't think the LS6 intake contributes to rich/lean changes at all. The "crappy" 2000 LS1 intake is about the same as the LS6 if you don't have heads/cam/headers, etc.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Actually its a rare occasion for headers to make an engine run lean. The majority of the time LT's will cause a car to run pig rich.
TECH Apprentice
Joined: Nov 2001
Posts: 392
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From: Williamsburg, VA
Re: Running Lean and Rich questions Actually, headers make most any car run lean, compared with stock manifolds. The PCM just happens to overcorrect for the lean condition on our cars. Put headers on a old school SB Chevy? Gotta fatten up the jetting.
Re: Running Lean and Rich questions The air conditioner is always BYPASSED summer or winter until someone decides to press that little button that says AC. That's when that little guy that lives inside of your AC compressor wakes up and tells that electro-magnetic clutch to energize and load your engine down. Don't screw around with your AC.
Re: Running Lean and Rich questions </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Brother J:
<strong>Actually, headers make most any car run lean, compared with stock manifolds. The PCM just happens to overcorrect for the lean condition on our cars. Put headers on a old school SB Chevy? Gotta fatten up the jetting.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">i'm not trying to argue here, cuz i'm goin to put headers on my car in a month so i'm going to have to do some tuning with a MAFT, but when the PCM over corrects for the lean condition the car is running rich isn't it?
<strong>Actually, headers make most any car run lean, compared with stock manifolds. The PCM just happens to overcorrect for the lean condition on our cars. Put headers on a old school SB Chevy? Gotta fatten up the jetting.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">i'm not trying to argue here, cuz i'm goin to put headers on my car in a month so i'm going to have to do some tuning with a MAFT, but when the PCM over corrects for the lean condition the car is running rich isn't it?
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TECH Apprentice
Joined: Nov 2001
Posts: 392
Likes: 0
From: Williamsburg, VA
Re: Running Lean and Rich questions </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by FstBlkz28:
<strong>[QUOTE]i'm not trying to argue here, cuz i'm goin to put headers on my car in a month so i'm going to have to do some tuning with a MAFT, but when the PCM over corrects for the lean condition the car is running rich isn't it?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Upon further consideration, I should have taken into account the role of the PCM in all of this because regardless of what the headers do, it is ultimately how the PCM reacts that determines the final outcome. Thanks for helping me realize that. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<strong>[QUOTE]i'm not trying to argue here, cuz i'm goin to put headers on my car in a month so i'm going to have to do some tuning with a MAFT, but when the PCM over corrects for the lean condition the car is running rich isn't it?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Upon further consideration, I should have taken into account the role of the PCM in all of this because regardless of what the headers do, it is ultimately how the PCM reacts that determines the final outcome. Thanks for helping me realize that. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
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