Max Effort Cam Advice - Small Cam Gurus Need Not Apply
10-22-2019, 05:11 PM
#1
Max Effort Cam Advice - Small Cam Gurus Need Not Apply Basically narrowed my choices to the following:
VINDICATOR - 240/244 - .605/.596 - 112 lsa
Polluter - 242/244 - .61x/.61x - 112 lsa
T-ReX v.2 - 242/248 - .608/.612 - 110 lsa
Ill be running stock 243 heads on an LS6 short block with .040 cometic gaskets. Max Effort are the key words here, Willing to sacrifice alot drivability and fuel economy. Just 1/4 mile drag racing with all the supporting mods. The only thing i am concerned of is PTV with the .040 head gaskets which leans me more towards the Vindicator or Polluter because with my limited cam knowledge i feel the Trex will have less PTV. Willing to sacrifice a few HP for better under the curve as this is a street/strip car. Tuning not a concern
VINDICATOR - 240/244 - .605/.596 - 112 lsa
Polluter - 242/244 - .61x/.61x - 112 lsa
T-ReX v.2 - 242/248 - .608/.612 - 110 lsa
Ill be running stock 243 heads on an LS6 short block with .040 cometic gaskets. Max Effort are the key words here, Willing to sacrifice alot drivability and fuel economy. Just 1/4 mile drag racing with all the supporting mods. The only thing i am concerned of is PTV with the .040 head gaskets which leans me more towards the Vindicator or Polluter because with my limited cam knowledge i feel the Trex will have less PTV. Willing to sacrifice a few HP for better under the curve as this is a street/strip car. Tuning not a concern
10-22-2019, 06:39 PM
#6
TECH Veteran
Pat G is REALLY good at these type of situations.... i would consider contacting him if i was you.
10-22-2019, 06:50 PM
#7
FlowTech Induction aka Ed Curtis has the Hellion... 244/248 .631/.631 112.
Pretty much anything in that ballpark is going to make a little bit more power while being pretty much track only. The issue is, without the supporting mods, you'll actually be slower than a smaller cam.
Stock 243s and what else? Those cams need to spin high and you need gear/tire and stall to support that. And to spin high, you need a good valvetrain and an effective intake manifold... like the MSD. True duals to let it breathe. ATI pulley or similar. EWP. Etc etc.
Pretty much anything in that ballpark is going to make a little bit more power while being pretty much track only. The issue is, without the supporting mods, you'll actually be slower than a smaller cam.
Stock 243s and what else? Those cams need to spin high and you need gear/tire and stall to support that. And to spin high, you need a good valvetrain and an effective intake manifold... like the MSD. True duals to let it breathe. ATI pulley or similar. EWP. Etc etc.
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10-22-2019, 06:53 PM
#8
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FlowTech Induction aka Ed Curtis has the Hellion... 244/248 .631/.631 112.
Pretty much anything in that ballpark is going to make a little bit more power while being pretty much track only. The issue is, without the supporting mods, you'll actually be slower than a smaller cam.
Stock 243s and what else? Those cams need to spin high and you need gear/tire and stall to support that. And to spin high, you need a good valvetrain and an effective intake manifold... like the MSD. True duals to let it breathe. ATI pulley or similar. EWP. Etc etc.
Pretty much anything in that ballpark is going to make a little bit more power while being pretty much track only. The issue is, without the supporting mods, you'll actually be slower than a smaller cam.
Stock 243s and what else? Those cams need to spin high and you need gear/tire and stall to support that. And to spin high, you need a good valvetrain and an effective intake manifold... like the MSD. True duals to let it breathe. ATI pulley or similar. EWP. Etc etc.
10-22-2019, 07:03 PM
#9
11.5:1 or better actually. That would make flycutting the pistons a priority and milling the heads, or going with a set of heads like PRC 225s that allow for stock-like PtV clearance with 62cc chambers. Also, something like the AI high compression 218cc welded heads could work but aren't that much cheaper these days.
I guess the point is, people have wrung out 500+rwhp with less cam in these cars. But it's not cheap with a stock shortblock. Big cam and 243s are going to be down 50rwhp or more to those combos.
I guess the point is, people have wrung out 500+rwhp with less cam in these cars. But it's not cheap with a stock shortblock. Big cam and 243s are going to be down 50rwhp or more to those combos.
10-22-2019, 07:04 PM
#10
The car has a fast 102 with speed density tune. 1 7/8 headers and a electric water pump. Did I miss any thing major Slp? He is also shooting for the local cam only record so heads are out. With the .04 head gaskets should put the compresion ratio of 11.46
Last edited by c4boom; 10-22-2019 at 07:11 PM.
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10-22-2019, 07:37 PM
#14
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There is not a short runner fast for cathedral heads.
Edit - treed by two seconds
Edit - treed by two seconds
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JakeFusion (10-22-2019)
10-22-2019, 07:49 PM
#16
FAST will peak around 6400 no matter what cam is in there. MSD will peak closer to 6800-7000. And with a big cam with a later IVC, you want that peak because you'll be carrying it through 7500+. That will win some grudge races.
I'd look at some of the more stable lobes from Comp or Cam Motion and go with something custom that's in the 240-244 intake and 244-250 exhaust duration on a 112+3.
I'd look at some of the more stable lobes from Comp or Cam Motion and go with something custom that's in the 240-244 intake and 244-250 exhaust duration on a 112+3.
10-22-2019, 08:47 PM
#18
i dont know if i agree on the fast peaking at 6400. this is an old dyno sheet of mine with the stock ls6 cam and 1.8 rockers still climbing at 6600. for supporting mods the car has a fast 102/102, 4" coupler, FTP 104mm lid, speed density, slp 25% under drive, tsp 1 7/8, 3" ory, 1.7 yella terra, pac 1209x, chromoly pushrods, .040 head gaskets, johnson drop in 2110 lifters.
10-23-2019, 10:08 AM
#20
x2, that's what I'd do.
100%. Seen it time and time again where 22x/23x cams have performed far better than 24x duration cams in otherwise similar mild combos (i.e. LS6 manis, stock heads, etc.). Proper manifold selection will be key to success here with the parameters involved. I'd want that late IVC matched to a manifold that will really pull the rpms. Edit: Just saw OP has 102 mani, thought mani was stock. MSD seems to pull harder up top but 102 ain't the worse option. I'd get a proper port job done on either.
I did the same with the Cometics, bumps compression with stock LS6 heads from 10.5:1 to either 10.86:1 or 10.9:1 IIRC, been awhile since I calculated. Low for the cams mentioned but given the stock heads constraint it's the best that can be done if head milling is not allowed.
FlowTech Induction aka Ed Curtis has the Hellion... 244/248 .631/.631 112.
Pretty much anything in that ballpark is going to make a little bit more power while being pretty much track only. The issue is, without the supporting mods, you'll actually be slower than a smaller cam.
Stock 243s and what else? Those cams need to spin high and you need gear/tire and stall to support that. And to spin high, you need a good valvetrain and an effective intake manifold... like the MSD. True duals to let it breathe. ATI pulley or similar. EWP. Etc etc.
Pretty much anything in that ballpark is going to make a little bit more power while being pretty much track only. The issue is, without the supporting mods, you'll actually be slower than a smaller cam.
Stock 243s and what else? Those cams need to spin high and you need gear/tire and stall to support that. And to spin high, you need a good valvetrain and an effective intake manifold... like the MSD. True duals to let it breathe. ATI pulley or similar. EWP. Etc etc.
I did the same with the Cometics, bumps compression with stock LS6 heads from 10.5:1 to either 10.86:1 or 10.9:1 IIRC, been awhile since I calculated. Low for the cams mentioned but given the stock heads constraint it's the best that can be done if head milling is not allowed.