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Summit stage 5 cam, c6 build progress.

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Old Apr 6, 2021 | 09:15 PM
  #281  
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Originally Posted by SLOW SEDAN
Whats the “what I want” goal?
low 10s n/a full weight with a/c . I want to do rocky mountain race week 11.0 class this year
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Old Apr 6, 2021 | 09:35 PM
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Originally Posted by Mavn
Yes. My 245mm circle d 4000 will be in in about a week
That will be a nice converter. Not fun to install, but nice. 😊

So true apples to apples in the head test. It will wake up with the cam change.

My buddy Corey did Rocky Mtn last year with his Chevelle. Said it was a blast. He nearly won the whole thing.
A couple other friends are planning to do it this year.
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Old Apr 6, 2021 | 09:52 PM
  #283  
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Originally Posted by RonSSNova
That will be a nice converter. Not fun to install, but nice. 😊

So true apples to apples in the head test. It will wake up with the cam change.

My buddy Corey did Rocky Mtn last year with his Chevelle. Said it was a blast. He nearly won the whole thing.
A couple other friends are planning to do it this year.
I'm paying my tuners shop to install the converter. I do not want to do it lol
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Old Apr 7, 2021 | 12:11 PM
  #284  
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Smart!
I need to rebuild my torque tube, in the garage, on the floor. I’m dreading it.
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Old Apr 7, 2021 | 02:49 PM
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I think the rodded stock intake and low lift cam contributed to the low gain from the heads. LS3 stuff needs as much lift as you can possibly get away with. The flow sheets show it on basically every version of LS3 head I have seen. If you didnt already have it coming, I would throw the hyd roller stuff out and go solid w/ a ported Fast and turn it up. .700 lift and supporting intake would do wonders. If you wanted to calculate the 8hp, I would look at your flow sheet on the Hooper heads and lay it over a flow sheet from similar set of OEM's. W: that .600 lift cam, you are probably getting barely a true .580 at the valve.
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Old Apr 7, 2021 | 05:58 PM
  #286  
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Originally Posted by DualQuadDave
I think the rodded stock intake and low lift cam contributed to the low gain from the heads. LS3 stuff needs as much lift as you can possibly get away with. The flow sheets show it on basically every version of LS3 head I have seen. If you didnt already have it coming, I would throw the hyd roller stuff out and go solid w/ a ported Fast and turn it up. .700 lift and supporting intake would do wonders. If you wanted to calculate the 8hp, I would look at your flow sheet on the Hooper heads and lay it over a flow sheet from similar set of OEM's. W: that .600 lift cam, you are probably getting barely a true .580 at the valve.
I have a llsr for him if he wants to test it.
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Old Apr 7, 2021 | 11:15 PM
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Originally Posted by AINT SKEERED
I have a llsr for him if he wants to test it.
I have yet to see anyone actually do it, but I have a theory that a solid roller w/ .700-740 lift on the intake, mid 230's duration w/ a ported Fast intake w/ ported stock 823's can make an easy 580-600whp. Maybe a touch more. Every combo I see has a max .640 lift hyd cam w/ .660 springs which means you never get to the sweet spot of that head. Honestly, that head is just getting started at .600.
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Old Apr 8, 2021 | 06:11 AM
  #288  
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What mods need to be done to the heads to achieve that much lift?

Thanks.
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Old Apr 8, 2021 | 06:37 AM
  #289  
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Originally Posted by DualQuadDave
I have yet to see anyone actually do it, but I have a theory that a solid roller w/ .700-740 lift on the intake, mid 230's duration w/ a ported Fast intake w/ ported stock 823's can make an easy 580-600whp. Maybe a touch more. Every combo I see has a max .640 lift hyd cam w/ .660 springs which means you never get to the sweet spot of that head. Honestly, that head is just getting started at .600.
This is something I'd be interested in doing next time I pull the heads off . I'll fly cut the pistons and do a very large LLSR
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Old Apr 8, 2021 | 07:05 AM
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Originally Posted by Mavn
This is something I'd be interested in doing next time I pull the heads off . I'll fly cut the pistons and do a very large LLSR
my current cam is equivalent to a hydraulic 240/256 duration cam. Knock 6 off solid which is 246/262 .689/.672 112+4 with a 1.7 rocker
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Old Apr 8, 2021 | 08:24 AM
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Originally Posted by Stampede4ever
What mods need to be done to the heads to achieve that much lift?

Thanks.
Spring settup and roller rockers for sure. I would not attempt this w/ stock hollow valves. I would go straight to aftermarket everything short of the head itself.
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Old Apr 8, 2021 | 01:03 PM
  #292  
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F2010P's come in about 9 grams heavier than LS3's but have thicker walls than the stock valves.
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Old Apr 8, 2021 | 03:35 PM
  #293  
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Originally Posted by DualQuadDave
I think the rodded stock intake and low lift cam contributed to the low gain from the heads. LS3 stuff needs as much lift as you can possibly get away with. The flow sheets show it on basically every version of LS3 head I have seen. If you didnt already have it coming, I would throw the hyd roller stuff out and go solid w/ a ported Fast and turn it up. .700 lift and supporting intake would do wonders. If you wanted to calculate the 8hp, I would look at your flow sheet on the Hooper heads and lay it over a flow sheet from similar set of OEM's. W: that .600 lift cam, you are probably getting barely a true .580 at the valve.
One thing to note, his latest 8 hp gain was from the FAST intake and aftermarket heads, which I agree will shine with more lift, duration, and RPM.
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Old Apr 8, 2021 | 08:21 PM
  #294  
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Were going to be partying soon!
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Old Apr 8, 2021 | 09:34 PM
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Time for the Mid-Length High HP Runners if you keep the FAST
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Old Apr 8, 2021 | 10:45 PM
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Originally Posted by Mavn

Were going to be partying soon!
IDK, it'll sound great and it"ll rev to the moon, but I wonder how much more power it'll actually make. Lift is still in the same boat. Somebody needs to engineer a 1.9/2.0 rocker and get the geometry on point. The SB2/R0 heads use those ratios an more. I think there is big power hiding in the valvetrain as the LS/LT evolve.
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Old Apr 8, 2021 | 11:43 PM
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Top one yes and bottom not so much for stock bottom end
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Old Apr 9, 2021 | 01:13 AM
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Originally Posted by DualQuadDave
IDK, it'll sound great and it"ll rev to the moon, but I wonder how much more power it'll actually make. Lift is still in the same boat. Somebody needs to engineer a 1.9/2.0 rocker and get the geometry on point. The SB2/R0 heads use those ratios an more. I think there is big power hiding in the valvetrain as the LS/LT evolve.
I believe it’s better to do it in the cam lobe and not the rocker ratio. Cup cars use the high ratios due to other restrictions I believe. You can get nearly 800 lift with a stock cam core and 1.8 ratio rockers.
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Old Apr 9, 2021 | 10:38 AM
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Originally Posted by spanks13
I believe it’s better to do it in the cam lobe and not the rocker ratio. Cup cars use the high ratios due to other restrictions I believe. You can get nearly 800 lift with a stock cam core and 1.8 ratio rockers.
i do agree, it's better to do it in the lobe, but you also have some natural effects of going big that higher rocker ratios sometimes make it easier on the driveabilty side. There is no absolute answer, just have to experiment w/ each individual combo. I'm waiting on Summit to have a sale on a Spintron, lol.
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Old Apr 9, 2021 | 10:43 AM
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Originally Posted by LaBLKv6Z
One thing to note, his latest 8 hp gain was from the FAST intake and aftermarket heads, which I agree will shine with more lift, duration, and RPM.
i went back and didnt see a Fast on the list. I just saw mention of the ported stocker which gained 1hp. Then saw the 8hp gain from the heads. The interesting part of this is the fact that 1hp gained with the ported intake gives you a window into how much air the head is moving. You could probably reverse engineer some flow #'s of a stock intake flowed on a stock or ported stock 823 head and look at where the .550-.600#'s are and guesstimate that is actually how much is getting used when the valve is open. Maybe
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