Naturally aspirated, HP’s per Cu. In.???
04-15-2019, 07:51 AM
#1
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Thread Starter
Naturally aspirated, HP’s per Cu. In.???
As a life long, ate up, internal combustion gear head, I have always followed that math.
Want to impress me?
Show me that math.
I grew up thinking that anything at or above 1:1 is good.
As in, 500 Cu in = 500 HP is good.
IMO, remains true today.
Just watched a Top Gear rerun where they tested a Ferrari that had a naturally aspirated 6.5 liter/403 Cu in V-12 making 800 HPs!
Thats 1.985 HP per Cu In!
Bern a while since I paid a lot of attention to this but I still know that number is up there!
Who can think of what, non race, 4 stroke (a 2 stroke w/an expansion chamber easily surpasses 2:1) that beats this?
Nothing against forced induction but start w/this then screw in a pair of turbos 😎
Want to impress me?
Show me that math.
I grew up thinking that anything at or above 1:1 is good.
As in, 500 Cu in = 500 HP is good.
IMO, remains true today.
Just watched a Top Gear rerun where they tested a Ferrari that had a naturally aspirated 6.5 liter/403 Cu in V-12 making 800 HPs!
Thats 1.985 HP per Cu In!
Bern a while since I paid a lot of attention to this but I still know that number is up there!
Who can think of what, non race, 4 stroke (a 2 stroke w/an expansion chamber easily surpasses 2:1) that beats this?
Nothing against forced induction but start w/this then screw in a pair of turbos 😎
04-15-2019, 12:06 PM
#3
Registered
Our Super cat engines are 509 cuin and in theory make 800 HP (unless your NZ-1, AMH, WHM, performance, ect. there's probably make 2000 hp) So around 1.6 hp per cuin but that is on 93 octane fuel and ours lived a whole season of testing and running.
I do have a 2 stroke that makes close to 6 hp cuin n/a and a rotary that makes close to 7 hp cuin. And a diesel that makes 4 hp cuin but on lots of boost.
I do have a 2 stroke that makes close to 6 hp cuin n/a and a rotary that makes close to 7 hp cuin. And a diesel that makes 4 hp cuin but on lots of boost.
Last edited by BigSilverCat; 04-15-2019 at 12:08 PM.
04-15-2019, 12:43 PM
#4
Platinum Member
Platinum Member
I agree, while growing up 1hp/cuin was doing well, Sixteen Power is claiming 1400hp from its LS based V16
854 cuin 1400 hp is 1.64ish
In the 90's GM's LT small block was hot stuff at less than 1 hp/cuin
And Fords' 5 point nothing (5.0) was about the same in a lighter package
854 cuin 1400 hp is 1.64ish
In the 90's GM's LT small block was hot stuff at less than 1 hp/cuin
And Fords' 5 point nothing (5.0) was about the same in a lighter package
04-15-2019, 07:24 PM
#6
Registered
Thread Starter
Good stuff.
Is the Aston normally asperated?
The Super Cat post is funny and wayyy impressive.
Great numbers and a full season on those motors is damned
impressive.
Forgot about the bikes.
The lighter the load, the wilder they can be.
Is the Aston normally asperated?
The Super Cat post is funny and wayyy impressive.
Great numbers and a full season on those motors is damned
impressive.
Forgot about the bikes.
The lighter the load, the wilder they can be.
04-15-2019, 09:34 PM
#8
Registered
Thread Starter
Wildman, that sounds right.
I have an addition.
Pro Stock drag cars.
500 Cu in’s @ 1500 HP = 3 per.
I remember thinking they were about top of the food chain.
I have an addition.
Pro Stock drag cars.
500 Cu in’s @ 1500 HP = 3 per.
I remember thinking they were about top of the food chain.
04-16-2019, 06:13 AM
#9
Platinum Member
Platinum Member
Manufacturers made more power in the 50's and 60' before emission control. Their solution to meet standards was to retard camshaft timing and decrease to static compression so low most engines in the 70's and early 80' were anchors
for example to Ford 460 was mid 300's in 1970 (D0VE) and dropped to 200 a couple years later
for example to Ford 460 was mid 300's in 1970 (D0VE) and dropped to 200 a couple years later
04-16-2019, 06:22 AM
#10
Registered
Manufacturers made more power in the 50's and 60' before emission control. Their solution to meet standards was to retard camshaft timing and decrease to static compression so low most engines in the 70's and early 80' were anchors
for example to Ford 460 was mid 300's in 1970 (D0VE) and dropped to 200 a couple years later
for example to Ford 460 was mid 300's in 1970 (D0VE) and dropped to 200 a couple years later
