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SVT Shelby GT500
Educate me on HP levels and pump gas
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<blockquote data-quote="RBB" data-source="post: 15824055" data-attributes="member: 152686"><p>I understand all of the outside variables, of course I don't have a problem with that, I even requested a very safe tune for the street....don't need to go crazy with the timing, etc. I've just never heard a tuner say we don't want to see any more than X HP on a certain octane. If you have enough octane to safely run Y boost and Z timing, it seems like HP wouldn't be limited by the octane. Of course Y boost and Z timing will create X amount of HP on a particular engine/blower combo, so you can give someone a general idea of what kind of power it will make.</p><p></p><p>The way I took what he was telling me yesterday (and this is pretty much word for word from our email) is that even if the tune is good and we're well within the safe timing and boost limits for 93 octane, the timing will still be dialed way back if we go over 750HP. Just seemed odd to me as I have never seen this discussed on the forums before. Also, I know there are many GT500s running well over 750 rwhp on 93 octane, many which, I believe, are tuned by him. Don't get me wrong, I'm not complaining, as 750 at the wheels is more than enough for the street....I will have a race gas tune for the strip. All of the outside factors excluded (batch of bad gas, etc), I just wanted an explanation as to why we would dial the tune back based solely on a HP # if we're running a known safe calibration for timing and boost.</p><p></p><p></p><p></p><p>I have no problem with the tuner, and of course I'll listen to and go with what he thinks is best. I was just curious as to why we'd dial a tune back based solely on a HP # if we're running a safe calibration for the timing and boost level. Not at the shop, it will be a remote tune session on the dyno. Still going through initial revisions on idle/cruise logs right now.</p><p></p><p><strong>I think some of you guys are taking this question the wrong way. I'm curious, I like to learn about the mechanics of things. I don't care if this is what he thinks is safe and this is how we're going to do it, no problems from me there. I don't care about the tuner protecting his rep, of course I understand that, that is also a given and I have no problem with it. I'm also not interested in the fact that we could get a batch of bad gas, etc.....that is a given on any day....I'm not interested in discussing that either.</strong></p><p><strong></strong></p><p><strong>I only want to discuss this question from a mechanical/scientific viewpoint....all this other stuff is inconsequential to me and a given. Why would you dial a tune back if it's making over X amount of HP when you're running a known and safe calibration that can support the amount of boost and timing you're making on a particular octane?</strong></p></blockquote><p></p>
[QUOTE="RBB, post: 15824055, member: 152686"] I understand all of the outside variables, of course I don't have a problem with that, I even requested a very safe tune for the street....don't need to go crazy with the timing, etc. I've just never heard a tuner say we don't want to see any more than X HP on a certain octane. If you have enough octane to safely run Y boost and Z timing, it seems like HP wouldn't be limited by the octane. Of course Y boost and Z timing will create X amount of HP on a particular engine/blower combo, so you can give someone a general idea of what kind of power it will make. The way I took what he was telling me yesterday (and this is pretty much word for word from our email) is that even if the tune is good and we're well within the safe timing and boost limits for 93 octane, the timing will still be dialed way back if we go over 750HP. Just seemed odd to me as I have never seen this discussed on the forums before. Also, I know there are many GT500s running well over 750 rwhp on 93 octane, many which, I believe, are tuned by him. Don't get me wrong, I'm not complaining, as 750 at the wheels is more than enough for the street....I will have a race gas tune for the strip. All of the outside factors excluded (batch of bad gas, etc), I just wanted an explanation as to why we would dial the tune back based solely on a HP # if we're running a known safe calibration for timing and boost. I have no problem with the tuner, and of course I'll listen to and go with what he thinks is best. I was just curious as to why we'd dial a tune back based solely on a HP # if we're running a safe calibration for the timing and boost level. Not at the shop, it will be a remote tune session on the dyno. Still going through initial revisions on idle/cruise logs right now. [B]I think some of you guys are taking this question the wrong way. I'm curious, I like to learn about the mechanics of things. I don't care if this is what he thinks is safe and this is how we're going to do it, no problems from me there. I don't care about the tuner protecting his rep, of course I understand that, that is also a given and I have no problem with it. I'm also not interested in the fact that we could get a batch of bad gas, etc.....that is a given on any day....I'm not interested in discussing that either. I only want to discuss this question from a mechanical/scientific viewpoint....all this other stuff is inconsequential to me and a given. Why would you dial a tune back if it's making over X amount of HP when you're running a known and safe calibration that can support the amount of boost and timing you're making on a particular octane?[/B] [/QUOTE]
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Educate me on HP levels and pump gas
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