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What's the largest cam you ls2 guy have ran with 821 heads milled .030

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What's the largest cam you ls2 guy have ran with 821 heads milled .030

 
Old 07-11-2018, 02:21 PM
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Default What's the largest cam you ls2 guy have ran with 821 heads milled .030

I'm about to have my heads milled and was wondering how big of a cam I can get away with milling .030 with stock ls2 head gaskets and non flycut stock pistons with 821 heads.I currently have a btr square port
stage 2 cam. 225/238 durstion.
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Old 07-11-2018, 08:21 PM
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I'm running that cam also...not sure how much my heads was milled. Just mainly cleaned them up..went from 70cc to 68cc. They was just within my installers recommended PTV clearance.
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Old 07-18-2018, 02:45 PM
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Im running a BTR Stage 4 LS3 cam with the heads milled .025

235/250 duration
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Old 07-18-2018, 08:15 PM
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Originally Posted by EJ2King View Post
Im running a BTR Stage 4 LS3 cam with the heads milled .025

235/250 duration
I would have liked that cam..but my engine guy said 'not enough ptv clearance. Don't know what the difference is? Read your other thread...numbers looked prettty good. I made 441/412 thru a locked torque convertor and 3.70 gears. I have the X-air intake also....big difference
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Old 07-18-2018, 08:42 PM
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Originally Posted by 13qtr View Post
I would have liked that cam..but my engine guy said 'not enough ptv clearance. Don't know what the difference is? Read your other thread...numbers looked prettty good. I made 441/412 thru a locked torque convertor and 3.70 gears. I have the X-air intake also....big difference
I'm not sure what the difference is either. I have a good bit of clearance with mine although it did seem like it was gonna be a little tight at first.
I'd say your numbers sound right for a geared A4 car. I'm running 3.91's myself.

I am now thoroughly aware of how gains are exponential. I would not at all be surprised if the addition of my XAir added 20whp as my tuner speculated. This cam is DEF a top breather and my old setup was tremendously restrictive compared to what I have now. I am still waiting to get it back on a dyno but there was a very noticeable increase in feel. And I don't even have a very sensitive butt dyno. I'd liken the difference to when I added my longtubes.
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Old 07-18-2018, 08:46 PM
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Sorry, for the minor threadjack. OP, I'd say go big and just have your builder (or yourself) check PTV to make sure you're okay. I absolutely LOVE my cam. I wouldn't love it so much if I had to daily drive it though. 13qtr probably has a more friendly DD setup.
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Old 07-18-2018, 08:52 PM
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with the x-air...datalogging...it holds about 96-98 kpa at wot. So not much restriction. I also have a custom made 95mm maf sensor with the LS3 card style sensor. When I put a ported stock ls3 intake manifold on...it picked up 19whp at peak...more down low, and somewhere around 15 on torque.
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Old 07-18-2018, 10:30 PM
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My heads not milled at all but I'm running a 229/244 cam. 821 heads on top of a sbe LS2.
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