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Throttle bodies vs carbs
- Thread starter SeanDezart
- Start date
SeanDezart
Well-Known Forum User
ben, until I've sampled your 'road' engine, I can't claim that by dropping it into my car it would make it anything else than a non-hybrid 
Right now, I'd settle for any engine.......but it's still a road car ! Supercars like Bugattis have 1001 bhp and they aint called race cars, why should mine NOT be a road car 'cos it's got a lot for an L series ?
Right now, I'd settle for any engine.......but it's still a road car ! Supercars like Bugattis have 1001 bhp and they aint called race cars, why should mine NOT be a road car 'cos it's got a lot for an L series
?
SeanDezart
Well-Known Forum User
Oh my god, didn't you know ? I have a diploma in psychology and holistic medicine and I am a trained therapeutic masseur !
As for psychologists' interest, maybe you could explain your quest for engine size ?
As for psychologists' interest, maybe you could explain your quest for engine size
?
ZHead
Well-Known Forum User
Engine size Hadn't thought of it like that
Try bang for your buck, the most cost effective way to deliver high BHP and torque........
The V8 thing for me is not about speed but how the car will drive, bags of low down power and that noise ... but you definitely got me with your reply
Anyway, this is straying off throttle bodies vs carbs so back to it boys !!!
Hadn't thought of it like that Try bang for your buck, the most cost effective way to deliver high BHP and torque........
The V8 thing for me is not about speed but how the car will drive, bags of low down power and that noise ... but you definitely got me with your reply
Anyway, this is straying off throttle bodies vs carbs so back to it boys !!!
SeanDezart
Well-Known Forum User
Exactly why I've gone for my 3.1, it aint about speed (although I'll have plenty) and I want Ben to understand that - mine's a road car !ZHead said:
boomer
Well-Known Forum User
Sean, at this point, I think you should point out that:
In France YOU CANNOT DRIVE A SINGLE SEATER RACE CAR REPLICA in the street!
You cannot build your car out of a scale one REVEL kit and get away with it!
Yes, it's a shame I know, but we have laws that are a bit restrictive here!
So when you say yours is a road car, it mean that! A car that cannot be seen as anything else but a car intended for that purpose… being driven in the street.
But maybe you could give them a break and concede that yours is a SLEEPER !
In France YOU CANNOT DRIVE A SINGLE SEATER RACE CAR REPLICA in the street!
You cannot build your car out of a scale one REVEL kit and get away with it!
Yes, it's a shame I know, but we have laws that are a bit restrictive here!
So when you say yours is a road car, it mean that! A car that cannot be seen as anything else but a car intended for that purpose… being driven in the street.
But maybe you could give them a break and concede that yours is a SLEEPER !
SeanDezart
Well-Known Forum User
A true 'Q' car !
SeanDezart
Well-Known Forum User
I'm still not convinced that a drag strip is a scientific place of research - too many variables !
Quote from Skiddy :
"Reaction time is a separate calculation
Your reaction time is measured from when the light goes green to when you
cross the start line light beam
Your end to end time is measured when you cross the start line light beam
not to when you cross the finish line light beam
Hence the fact that you could sit on the start line for 20 minutes but still
run a 13 second quarter
End to end elapsed time is all about power, traction and gearchanges -----
not reation time !"
And so I still think that there are other variables are a sloppy gearchange and dodgy tyres, no LSD ..........!
Quote from Skiddy :
"Reaction time is a separate calculation
Your reaction time is measured from when the light goes green to when you
cross the start line light beam
Your end to end time is measured when you cross the start line light beam
not to when you cross the finish line light beam
Hence the fact that you could sit on the start line for 20 minutes but still
run a 13 second quarter
End to end elapsed time is all about power, traction and gearchanges -----
not reation time !"
And so I still think that there are other variables are a sloppy gearchange and dodgy tyres, no LSD ..........!
And your alternative is ---
No use dismissing things Sean unless you are prepared to offer logical reasons why and plausible alternatives.
Also, be aware that every physicist, mathematician, motorsport engineer and drag racer in the world will disagree with you, as anything can be mathematically modelled given enough time, but of course what do they know?????
Variables exist Sean, its a fact of life, but by good science and solid experimentation they can be quantified and accounted for.
Example, some bright spark (Danish astronomer called Roemer) calculated the speed of light -- don’t you think that there may have been variables affecting his calculations --especially considering that he did it in the 1670's -- but checking his figures against today’s standards (lasers, atomic clocks etc) his calculations were less than 0.2% out. Please tell me why a drag strip is more complex (mathematically) than the cosmos.
Remember back to school physics lessons you may remember the fairly well known and accepted Newtons 2nd law of motion (care to question that Sean
)F=MA
Or Force equals mass x acceleration
That in a nutshell is it,
When you calculate either an HP figue based upon a time and weight or a time based upon an HP and weight you are assuming (you have to) that it was a perfect run, then you can factor in small negative bias values for your variables (Tyres, gear selection, stupid drivers)
zedhead260
Well-Known Forum User
The maths associated with the elapsed time of a standing quarter mile shows you how much horse power you made available on that run at the rear wheels (poviding of course you have weighed your vehicle before hand including yourself).
We all know there is power loss through the transmission, and the biggest loss is down to tyres.
If you want to run with dodgy tyres then you will have a greater power loss, and of course, having an LSD will remove some of that loss. That's why we say it's all about getting the power down, it's no good having a shit ton of power if all you do is spin it away - how many times have you heard people say "yeah, my car spins the wheels in third gear mate" - whoopee effin' do, I'll be miles ahead while your smoking your tyres.
What we are after is a reasonable figure - something in which to demonstrate. So have a bit of practice first, get the hang of the starts and those sloppy gear changes. Weigh your car with half a tank of fuel so you have a reasonable average - maybe even take an average quarter mile time rather than that one off personal best.
How do you know that so-and so's rolling road is giving you an accurate figure, do rolling road fall under The Weights and Measures Act ?
I think not.
We all know there is power loss through the transmission, and the biggest loss is down to tyres.
If you want to run with dodgy tyres then you will have a greater power loss, and of course, having an LSD will remove some of that loss. That's why we say it's all about getting the power down, it's no good having a shit ton of power if all you do is spin it away - how many times have you heard people say "yeah, my car spins the wheels in third gear mate" - whoopee effin' do, I'll be miles ahead while your smoking your tyres.
What we are after is a reasonable figure - something in which to demonstrate. So have a bit of practice first, get the hang of the starts and those sloppy gear changes. Weigh your car with half a tank of fuel so you have a reasonable average - maybe even take an average quarter mile time rather than that one off personal best.
How do you know that so-and so's rolling road is giving you an accurate figure, do rolling road fall under The Weights and Measures Act ?
I think not.
zedhead260
Well-Known Forum User
Take a look at The Top 10's class 5 in the latest magazine.
Note how 1st place Richard Newton's 13.044 has a terminal speed of 108.92 mph
Now look at 7th place and Andy Eleftheriou 13.696 has a top speed of 113.01
Does it tell you anything ?
Note how 1st place Richard Newton's 13.044 has a terminal speed of 108.92 mph
Now look at 7th place and Andy Eleftheriou 13.696 has a top speed of 113.01
Does it tell you anything ?
SeanDezart
Well-Known Forum User
It tells me that I'm happy for the S30s that the timing is 'only' over a 1/4 mile ;-)zedhead260 said:
Confession - my physics teacher had more spots than we did put together as a class, she hated kids and her idea of discipline was to give the whole class essays or lines as a result of one or two silly arses - result, nobody respected her, the subject or what dropping would entail !
Timed 'runs' over here are as rare as seeing an S30 on the British roads between October and May so I'm gonna have to rely upon a certain rolling road near Slough.
If ever I have more money this year, I will come along to one of the drag runs, hopefully have a bit of practice, some useful, constructive hints from my fellow competitors and we'll see what that gives !
The car will be weighed and I can just about (with the use of a calculator) adjust that for some fuel and me) !
I can't predict if I shall be more or less stupid than other drivers
!
SeanDezart
Well-Known Forum User
Arr, but are you measuring speed by top speed or by velocity (speed of acceleration) ?
No sorry your not getting away with that one, velocity is not defined as "speed of acceleration"
Acceleration is already a measurement of change and is defined as the rate of change of velocity
Its units of measurement reflect this ...... linear distance per second squared or linear distance per second per second
Velocity is a vector (ie a component with both magnitude and direction)
Speed on the other hand is defined as the magnitude of velocity (remember velocity has 2 components as its a vector)
But for this instance speed and velocity are one and the same
Acceleration is already a measurement of change and is defined as the rate of change of velocity
Its units of measurement reflect this ...... linear distance per second squared or linear distance per second per second
Velocity is a vector (ie a component with both magnitude and direction)
Speed on the other hand is defined as the magnitude of velocity (remember velocity has 2 components as its a vector)
But for this instance speed and velocity are one and the same
SeanDezart
Well-Known Forum User
Yeah...........alright but the fastest car isn't always the fastest at accelerating - right ? And that was my point V. Grolls !
Or, we all have to re-define 'fastest' eh ;-) ?
Or, we all have to re-define 'fastest' eh ;-) ?