what do you think I need for making high hp?
#122
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whatever you do don't mention this to nascar.....you'll destroy their whole engine program.they count on it in cam lift restricted racing (everywhere)
#123
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You are an attorney by trade IIRC and go-fast is a renowned engine builder beyond just the VQ platform with a waiting list of customers. Now who should we listen to and believe?
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#124
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If everyone shared insights and understandings (right or wrong) and put as much effort into these kinds of topic as Terry did, we'd be able to start our own EFI college here in my350z.
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#125
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Now, if you have the big bucks to get your heads and cams refurbished every couple thousand miles, great. Use the launch off of the lobes to your advantage. But you, of all people, should know that the it will not be very long before something will break.
#127
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Be that as it may be, most all of us would have a tendency to believe folks like Jim Wolf, and are better off for doing so, so can't fault Terry there.
If everyone shared insights and understandings (right or wrong) and put as much effort into these kinds of topic as Terry did, we'd be able to start our own EFI college here in my350z.
Even if this crowd can be a little harsh, your thoughts are appreciated Terry.
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If everyone shared insights and understandings (right or wrong) and put as much effort into these kinds of topic as Terry did, we'd be able to start our own EFI college here in my350z.
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
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#128
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back on the original topic,jw's special springs are a bunch of hooey and any comparable spring from any quality manufaturer will work just fine....regardless of what jw says.
it makes me question the sales tactics and ethics of jw (yet again)
#130
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Awesome. go-fast is still an OG and renowned expert in this industry who has chosen to remain anonymous on this forum. But a few of us know who he is and therefore will respect his professional opinion over anything you say or Jim Wolf tells you. I will take go-fast's word over Jim Wolf's any day of the week.
#131
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Awesome. go-fast is still an OG and renowned expert in this industry who has chosen to remain anonymous on this forum. But a few of us know who he is and therefore will respect his professional opinion over anything you say or Jim Wolf tells you. I will take go-fast's word over Jim Wolf's any day of the week.
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#132
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i do care....very much so,but it can only be used as a loose guide to the behaviour of the cam.ramp rate,intake lenght ect. have far more to do with actual performance than......again......advertised specs.
back on the original topic,jw's special springs are a bunch of hooey and any comparable spring from any quality manufaturer will work just fine....regardless of what jw says.
it makes me question the sales tactics and ethics of jw (yet again)
back on the original topic,jw's special springs are a bunch of hooey and any comparable spring from any quality manufaturer will work just fine....regardless of what jw says.
it makes me question the sales tactics and ethics of jw (yet again)
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#133
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Be that as it may be, most all of us would have a tendency to believe folks like Jim Wolf, and are better off for doing so, so can't fault Terry there.
If everyone shared insights and understandings (right or wrong) and put as much effort into these kinds of topic as Terry did, we'd be able to start our own EFI college here in my350z.
Even if this crowd can be a little harsh, your thoughts are appreciated Terry.
![](https://my350z.com/forum/images/smilies/icon38.gif)
If everyone shared insights and understandings (right or wrong) and put as much effort into these kinds of topic as Terry did, we'd be able to start our own EFI college here in my350z.
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
![ugh2](https://my350z.com/forum/images/smilies/ugh2.gif)
#134
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Please share with the forum what the lobe separation angle and overlap are for the BC cams. Right now we do not have that information, which makes it difficult to evaluate those cams.
#135
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I know Terry means well, but he has a tendency to make things unnecessarily complicated for those interested in a moderate power build. It's not rocket science! LOL I think he has muddied up threads in the FI section with theoretical speculations and JWT sales garble.![ugh2](https://my350z.com/forum/images/smilies/ugh2.gif)
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Rather than specifically mention cams, I would love to post a thread with cam profiles for cams from the various vendors. However, I have found only 2 vendors who make cams for our motors that specify lobe separation angle and/or valve overlap. Look at BC's website. The amount of information they provide about their cams is pathetic. If we as a community keep going along and ignoring that, why should they change???
Last edited by ttg35fort; 09-18-2009 at 03:26 PM.
#136
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Unfortunately, in this forum, all too often statements are made without any rational basis, and they are taken for gospel. What I bring is the ability and a willingness to analyze the information, which helps to make the decision process more clear for those building motors. Now, you are correct, for people doing moderate builds, it does not always make a difference. But, for those doing large builds, it does matter. Based on previous questions, there were those who thought the T25 exhaust flanges would create a bottleneck that would hurt the performance of large turbo builds. No one came on the forum and said that there was nothing to wory about. So, I did the analysis, shared it with the forum, and know everyone knows. You may not appreciate that, but a number of other people do.
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#137
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Go-fast, I'm assuming that you use BC cams, and you indicated that you use overlap and lobe separation angle as a loose guide to the behaviour of the cam.
Please share with the forum what the lobe separation angle and overlap are for the BC cams. Right now we do not have that information, which makes it difficult to evaluate those cams.
Please share with the forum what the lobe separation angle and overlap are for the BC cams. Right now we do not have that information, which makes it difficult to evaluate those cams.
btwy i only mentioned lift restricted cams as an example of how numbers lie.in no way did i suggest you use them on a vq,although several already employ this strategy and you would be suprised how prevelant it really is....can you say "high energy","magnum" or "voodoo" (hint hint)
#138
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On that note, you obviously disagree with what the JWT pdf says. Please review it and post an analysis of it to clarify the problems with it.
Last edited by ttg35fort; 09-18-2009 at 03:42 PM.
#139
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I'll put together cam charts for every vendor's cams who we have the data for, and start a new thread with this information. That way, forum members will be able to compare various cams when making their cam selections.
#140
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I would love to know what go-fast thinks about the various cams out today and which he'd recommend and why. I'll agree that there's often not a single right or wrong answer (i.e. "best" cam), but selecting the best cam for a particular application based on published specs is true voodoo and any insight (from Terry or go-fast) might be helpful in understanding it. I've read about concepts like jerk, splines, continuous snap, etc. but not of that stuff is published. The marketing data that is published doesn't help me evaluate the cams other than in generalities that Terry speaks to (about duration, lift, separation angle). How quickly the valve opens/closes would be another, but you can't really tell that from the specs. Or can you?
So, go-fast, how does anyone figure out what cam to buy? (other than trial and error from those who have tried it). Any insights on the thought process you go through would be appreciated.