Who has LS7 cam dyno graphs with cathedral port heads?
04-06-2018, 12:46 AM
#4
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Why run a GM cam ? Billformula LS7 car has been mid 10s at 130 plus with a TFS 235 headed LS7 motor in a 6 speed WS6.
04-06-2018, 08:37 AM
#7
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Originally Posted by big hammer
Here’s how I imagine a cathedral headed 427 Dyno would look like
Lol that post cracked me up.
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04-06-2018, 09:24 AM
#8
Its a boat application I want to see where the oem intake valve closing point made those motors peak because its so far away from how Id do a cam in almost any application I dont really have much to draw from even though Ive done around 1000 custom cams for LS stuff since 2003. For this application though advanced about 8 degrees it should be close to the valvetiming I want, in a OEM smooth lobe, with cams I have free laying on the shelf
04-06-2018, 09:32 AM
#9
Actually, a cathedral head would often make more average power than 98% of the LS7 heads you see on these engines. The cross section of a 235-245cc head done right is more ideal than most of the ported LS7 stuff used on prob 97% of cars out there
I know this because the first NA 427 engine i built went 143 NA in a AUTO car with a OEM intake manifold on it untouched a decade ago. How many heads/cam LS7 STICK cars have been that fast since with ANY manifold on it?
Brian Tooley swapped LS7 heads to a cathedral port and picked up 200hp on a blower car.. The shape of the port is irrelevant, the motor knows only if the port is right size for application
I know this because the first NA 427 engine i built went 143 NA in a AUTO car with a OEM intake manifold on it untouched a decade ago. How many heads/cam LS7 STICK cars have been that fast since with ANY manifold on it?
Brian Tooley swapped LS7 heads to a cathedral port and picked up 200hp on a blower car.. The shape of the port is irrelevant, the motor knows only if the port is right size for application
04-06-2018, 12:34 PM
#10
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Actually, a cathedral head would often make more average power than 98% of the LS7 heads you see on these engines. The cross section of a 235-245cc head done right is more ideal than most of the ported LS7 stuff used on prob 97% of cars out there
I know this because the first NA 427 engine i built went 143 NA in a AUTO car with a OEM intake manifold on it untouched a decade ago. How many heads/cam LS7 STICK cars have been that fast since with ANY manifold on it?
Brian Tooley swapped LS7 heads to a cathedral port and picked up 200hp on a blower car.. The shape of the port is irrelevant, the motor knows only if the port is right size for application
I know this because the first NA 427 engine i built went 143 NA in a AUTO car with a OEM intake manifold on it untouched a decade ago. How many heads/cam LS7 STICK cars have been that fast since with ANY manifold on it?
Brian Tooley swapped LS7 heads to a cathedral port and picked up 200hp on a blower car.. The shape of the port is irrelevant, the motor knows only if the port is right size for application
04-06-2018, 01:00 PM
#11
All the FASTEST ones are racecars, period. You can read internet lists, I do these things day in day out before LS1Tech.com was created
Heres the fastest hydraulic cam NA car by far. He took the record from us quite few years ago. Its a 427 with... cathedral port 235 TFS heads
Again, the shape of the port is irrelevant
04-06-2018, 01:14 PM
#12
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All the FASTEST ones are racecars, period. You can read internet lists, I do these things day in day out before LS1Tech.com was created
Heres the fastest hydraulic cam NA car by far. He took the record from us quite few years ago. Its a 427 with... cathedral port 235 TFS heads
https://youtu.be/Zr2uADCkKnE
Again, the shape of the port is irrelevant
Heres the fastest hydraulic cam NA car by far. He took the record from us quite few years ago. Its a 427 with... cathedral port 235 TFS heads
https://youtu.be/Zr2uADCkKnE
Again, the shape of the port is irrelevant
04-06-2018, 02:47 PM
#13
TECH Veteran
Well the difference is between those 2 cars is one of them is hydraulic roller and the other one is solid roller.
Not sure what's the weight difference is between those 2 cars.
Roddy Coleman car is now running a 440ci with TFS 245s by Greg Good and is running 5s in the 1/8 mile Naturally Aspirated with a hydrauic roller.
To each they own....
Not sure what's the weight difference is between those 2 cars.
Roddy Coleman car is now running a 440ci with TFS 245s by Greg Good and is running 5s in the 1/8 mile Naturally Aspirated with a hydrauic roller.
To each they own....
04-06-2018, 03:11 PM
#14
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Well the difference is between those 2 cars is one of them is hydraulic roller and the other one is solid roller.
Not sure what's the weight difference is between those 2 cars.
Roddy Coleman car is now running a 440ci with TFS 245s by Greg Good and is running 5s in the 1/8 mile Naturally Aspirated with a hydrauic roller.
To each they own....
Not sure what's the weight difference is between those 2 cars.
Roddy Coleman car is now running a 440ci with TFS 245s by Greg Good and is running 5s in the 1/8 mile Naturally Aspirated with a hydrauic roller.
To each they own....
Lol
The orange camero is actually pretty portly. 3130 ish RW. Likely a lot heavier than the black camero
04-06-2018, 04:26 PM
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No No No, solid rollers are just a gimmick 
04-06-2018, 05:30 PM
#16
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Your car is fast for a all motor car. If I run 10.2s with a 40x ci and you run the same with your 388ci what's the difference?
04-07-2018, 08:53 AM
#17
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Their is a really fast cathedral headed car running low 4’s in the 1/8 now but they’re mast 295 cathedrals lol
04-08-2018, 11:45 PM
#19
You must read alot more internet lists than you build hammer. I know Judson, had lunch on him a couple times actually LOL, but that is the most wrung out NA LS car on the planet - worlds removed from what 99% of these things are doing its twin TB 10,400 rpm engine.
The heads needs to be APPROPRIATELY sized for the task at hand. Most arent tasked with going 4.30s in the 1/8 or 10k. The port shape has little to do with anything. If the shape alone was the answer, the square port LS3 would have been on the C6 Z but it sucked so they had to revise it.
You drew a picture of what you THOUGHT a cathedral headed 427 might do on Microsoft paint, Ive done it LOL
Ive seen that cam test artical, but its on a 5.3, and a long runner truck intake which is a little further away from design. I said eff it though and the LS9 cas are going in 8 degrees advanced, well 7 because the timing set is a little off
The heads needs to be APPROPRIATELY sized for the task at hand. Most arent tasked with going 4.30s in the 1/8 or 10k. The port shape has little to do with anything. If the shape alone was the answer, the square port LS3 would have been on the C6 Z but it sucked so they had to revise it.
You drew a picture of what you THOUGHT a cathedral headed 427 might do on Microsoft paint, Ive done it LOL
Ive seen that cam test artical, but its on a 5.3, and a long runner truck intake which is a little further away from design. I said eff it though and the LS9 cas are going in 8 degrees advanced, well 7 because the timing set is a little off
