What makes an engine able to make more power on pump gas?
#1
What makes an engine able to make more power on pump gas?
Was in the Mulitmedia section and there is a link to cars modified by Undergroundracing.com. They are all expensive cars that make retarded power on pump gas. Alot of them are able to make 1k on pump gas with a build engine.
My question what makes it so that those engines make that much on pump? I know there is people around here makin alot on pump, but oit seems to be few and far between.
Thanks for any insight!
My question what makes it so that those engines make that much on pump? I know there is people around here makin alot on pump, but oit seems to be few and far between.
Thanks for any insight!
#2
A hell of a lot of dyno time. Getting the correct match of compression ratio, head flow, camshaft, timing and fuel maps, etc. That is what we pay for when we have a shop build our setups.
#3
A big CID motor good heads and the right cam.
If HP is what your after the cam heads and intake needs run hard up top.
Keep the exhaust back pressure as low as possible.
I’ve had several low 10 high 9 sec cars on pump
that I tuned at the track and on the street to get the best
drivability and performance.
One I took to the dyno for the hell of it.
I picked up 60 hp and about 45 lbs torque over
my seat of the pants/track tuning.
I though that the dyno was the **** until I started
driving it only to find it detonated it *** off with the dyno tune.
I put it back to where I had it and left it alone.
The dyno does not load the motor like driving the car does.
I don’t care how makes the dyno, it’s not the same.
The times slip at the track it your dyno sheet.
Who cars how much power it has on the dyno,
is it as fast I you want it to be?
If HP is what your after the cam heads and intake needs run hard up top.
Keep the exhaust back pressure as low as possible.
I’ve had several low 10 high 9 sec cars on pump
that I tuned at the track and on the street to get the best
drivability and performance.
One I took to the dyno for the hell of it.
I picked up 60 hp and about 45 lbs torque over
my seat of the pants/track tuning.
I though that the dyno was the **** until I started
driving it only to find it detonated it *** off with the dyno tune.
I put it back to where I had it and left it alone.
The dyno does not load the motor like driving the car does.
I don’t care how makes the dyno, it’s not the same.
The times slip at the track it your dyno sheet.
Who cars how much power it has on the dyno,
is it as fast I you want it to be?
#4
Dyno's like Dynapack, Dyno Dynamics, Mainline, Rototest etc will be able to load the engine much harder than would ever be seen on the road.
They will be able to hold any load site at WOT for tuning. You'll never do that on the road
But most engines can make silly power on pump gas. But as race fuel seems to be so easy to get hold of and so cheap, most people dont bother trying over there.
I know on a few guys in the UK making circa 800bhp from 2.2 4cyl turbo engines on pump fuel.
So to do similar from a massive V8, should be a piece of cake.
They will be able to hold any load site at WOT for tuning. You'll never do that on the road
But most engines can make silly power on pump gas. But as race fuel seems to be so easy to get hold of and so cheap, most people dont bother trying over there.
I know on a few guys in the UK making circa 800bhp from 2.2 4cyl turbo engines on pump fuel.
So to do similar from a massive V8, should be a piece of cake.
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#8
#12
I personally don't consider Meth injection to be "pump gas".
If you're running FI on pump gas, you'll be limited to around 16-18 psi boost unless you have some exotic chamber shape.
Since the boost is limited, and power is a function of NA power and boost level, the only option is to increase NA power.
So, make the most power you can NA (big cid, big heads, big cam, but low CR), then add 16-18 psi.
As someone else mentioned, keeping backpressure down is also key, as is running a larger water/air intercooler.
If you're running FI on pump gas, you'll be limited to around 16-18 psi boost unless you have some exotic chamber shape.
Since the boost is limited, and power is a function of NA power and boost level, the only option is to increase NA power.
So, make the most power you can NA (big cid, big heads, big cam, but low CR), then add 16-18 psi.
As someone else mentioned, keeping backpressure down is also key, as is running a larger water/air intercooler.
#13
#14
I personally don't consider Meth injection to be "pump gas".
If you're running FI on pump gas, you'll be limited to around 16-18 psi boost unless you have some exotic chamber shape.
Since the boost is limited, and power is a function of NA power and boost level, the only option is to increase NA power.
So, make the most power you can NA (big cid, big heads, big cam, but low CR), then add 16-18 psi.
As someone else mentioned, keeping backpressure down is also key, as is running a larger water/air intercooler.
If you're running FI on pump gas, you'll be limited to around 16-18 psi boost unless you have some exotic chamber shape.
Since the boost is limited, and power is a function of NA power and boost level, the only option is to increase NA power.
So, make the most power you can NA (big cid, big heads, big cam, but low CR), then add 16-18 psi.
As someone else mentioned, keeping backpressure down is also key, as is running a larger water/air intercooler.
A good collection of import cars run boost in the low 20's on pump gas. Did one the other day running 23 psi on pump.
#15
Pay attention to the throttle in the video,
it stays on the wood a long time before the turbo comes on. But it makes “1200 hp”.
I bet it would be pretty zippy from stop light to stop light.
FYI the UK has a lot better gas the we do.
http://www.youtube.com/watch?v=GzYl3cF-xMU
#17
What leads you to believe the UK has better gas ?
I'm running 21psi on my LS2 on pump gas with no problems whatsoever.
Ive tuned dozens of Subarus running 30psi with no problems on pump gas. A few Sierra Cosworths too.
And I can assure you, the fuel we get here is nothing special.
I'm running 21psi on my LS2 on pump gas with no problems whatsoever.
Ive tuned dozens of Subarus running 30psi with no problems on pump gas. A few Sierra Cosworths too.
And I can assure you, the fuel we get here is nothing special.
#18
Maybe what im tryin to say is if there is a 1000hp pump gas supra with 3.0l, why does 2000 from a 6.0 seem less possible. Im not sayin a stock LS2. I mean whatever it takes.
#19
It doesn’t work that way.
If 400 hp is enough power to go 160 MPH
then 800 hp will be enough to go 320 MPH right?
I don’t think so!
The smaller the motor the more power per cube it will make.
Max power = max cubes.
One thing the little motor import guys don’t mention
when they are bragging about the big power they are making
is torque,
Mention that word and they have nothing to say, because they have none.
Torque is what puts the smile on you face.
If 400 hp is enough power to go 160 MPH
then 800 hp will be enough to go 320 MPH right?
I don’t think so!
The smaller the motor the more power per cube it will make.
Max power = max cubes.
One thing the little motor import guys don’t mention
when they are bragging about the big power they are making
is torque,
Mention that word and they have nothing to say, because they have none.
Torque is what puts the smile on you face.
#20
fuel in the us is 93 octane or 94 octane. from my understanding you have access to higher octane at your average fueling station. Top gear has mentioned it several times that american fuel is crap. California I think has even less. 92? octane