Cam Opinions
Thread Starter
Joined: Jun 2011
Posts: 1,046
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From: Massachusetts
Cam Opinions Talked with Lloyd today about a custom cam for my build. He suggested a 242/248 584/579. I building a typical stroker motor with TFS heads. Thoughts? Not looking to spin motor past 6500.
I'm guessing those are unported TFS heads, because if they were really good flowing heads, 242 duration on a HR cam would not be conducive to a 6500 rpm limit.
Did you give Lloyd any performance goals other than a horsepower target?
Did you give Lloyd any performance goals other than a horsepower target?
Thread Starter
Joined: Jun 2011
Posts: 1,046
Likes: 2
From: Massachusetts
TFS heads are mildly ported. Only talked about my current track times and wanting to go deeper with new build. I'm hoping for low 11's and maybe a high 10 with Arctic weather conditions. I will still be driving it on the street here and there, about 3k miles a year.
The cam will do what you want assuming you gave him the correct info and follow his instructions.
He knows his stuff, and you can't tell just from duration @50 where it will peak. He could have played with the valve events or ground it with advance or retard to make it peak where you want it. We don't even have the LSA.
I wouldn't worry about it as long as you use the valvetrain he recommends.
He knows his stuff, and you can't tell just from duration @50 where it will peak. He could have played with the valve events or ground it with advance or retard to make it peak where you want it. We don't even have the LSA.
I wouldn't worry about it as long as you use the valvetrain he recommends.
I still think that's too much cam; it would have to be some very funky lobes to peak at 6100 rpm. Yes, that's where you would want your peak hp if your limit is 6500. Does LLoyd understand that? It looks to me like he's targeting a peak at 6500; maybe a communication issue? Or, like I alluded earlier, maybe he's assuming the heads don't flow very well.
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I still think that's too much cam; it would have to be some very funky lobes to peak at 6100 rpm. Yes, that's where you would want your peak hp if your limit is 6500. Does LLoyd understand that? It looks to me like he's targeting a peak at 6500; maybe a communication issue? Or, like I alluded earlier, maybe he's assuming the heads don't flow very well.
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Actual 6500 limit would be very low for a built 383, sounds more like what someone would do for a high mileage stock shortblock.
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Not bad, I'd put it on a 106 lsa, 238-240 degree intake lobe would be best in at 105 ICL. No sense in running such a wide LSA, I ran a similar 240/252 on a 107.5, I had better heads though.
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The duration and lift is exactly what an XFI468 cam from Comp is at. I ran it on my 350 with mildly worked TFS 195 heads. It peaked around 6500 and I shifted it at 68-6900. My cam was on a 114 yours is on a 110. You have more cubes than me though. I also ran a single plane intake which helps up top.
Thread Starter
Joined: Jun 2011
Posts: 1,046
Likes: 2
From: Massachusetts
I still think that's too much cam; it would have to be some very funky lobes to peak at 6100 rpm. Yes, that's where you would want your peak hp if your limit is 6500. Does LLoyd understand that? It looks to me like he's targeting a peak at 6500; maybe a communication issue? Or, like I alluded earlier, maybe he's assuming the heads don't flow very well.
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