• Mythbusters.

Posted: **Mon Mar 25, 2013 12:48 am**

Apparently a higher octane fuel is less flammable than lets say normal pump gas, I think this is true to a certain extend given the higher octane fuel usually has a higher vaporising point(hence its better anti-knock properties), but then when compared to oxygen enriched fuels like ethanol or methanol wouldn't that be more flammable than say standard pump fuel?

Posted: **Mon Mar 25, 2013 9:03 am**

Basically the higher the octane, the less likely the fuel is to combust. So with a higher octane fuel, you can run higher compression and more advanced timing without inducing pre-ignition (pinging).

On the more flammable/less flammable issue, I think that regular petrol is likely to catch alight more readily than methanol, I think normal petrol has a BTU (British Thermal Units) rating which is twice as high as methanol. To my knowledge the BTU rating is an excellent indicator of how volatile a fuel is.

Posted: **Mon Mar 25, 2013 9:23 am**

http://www.themotorreport.com.au/6915/t ... ane-number

Unleaded fuels carry a RON (Research Octane Number) rating. Put simply, RON determines petrol's 'anti-knock' quality or resistance to pre-ignition; or if you want to put in another way, the Octane Number denotes its resistance to detonation.

If you run your vehicle on low octane petrol you might notice a 'knocking', 'rattling', or 'pinging' sound (as it’s often called), which means the fuel is detonating instead of burning smoothly. This is not only a waste of energy, but it can also damage your engine in the long run. Burning is the desired effect of any internal combustion engine (not an explosion per se).

Fuel with a higher octane number suitable for your vehicle's engine will eliminate knocking. Older cars that were designed to run on a lower RON fuel can also benefit from a higher RON, because the older the car and the higher the kilometres, means the engine will have a greater propensity to knock. This is mainly caused by a build-up of contaminants and carbon deposits which, when hot, can cause pre-ignition

Posted: **Sat May 25, 2013 1:18 pm**

2L 8valve
Mods:
OEM intake,MP9 TB & Air box
4 bar feul regulator
Bosch injectors 180cc
Piston size 82mm
OEM 2L Stroke
298 Estas Cam
Stage 2+ Flywheel
Viper 4into1 branch & 63mm full system
60-2 XMS4b Perfect Power Management with blue fire
LIQUI MOLY 4T Oil
NO ADITIVES!!! CLEAN 95oct Pump Feul

see below setup with throttles and compare to above,

throttles with xflow head or single throttle with u-flow head?

I don`t know specs on the x-flow motor below, rumor, maybe a 2.1L, will try to find out what mods are done on this below motor, this one makes

136hp and 165nm,

the setup above figures are
135.96whp and 188nm,

though not on the same Dyno,

Posted: **Sat May 25, 2013 4:11 pm**

Posted: **Sat May 25, 2013 5:07 pm**

throttles with xflow head or single throttle with u-flow head?

I don`t know specs on the x-flow motor below, rumor, maybe a 2.1L, will try to find out what mods are done on this below motor, this one makes

136hp and 165nm,

the setup above figures are
135.96whp and 188nm,

though not on the same Dyno,

I think for throttles its only the sound of it, very close performance wise, but for me its the x-flo with throttles

Posted: **Sat May 25, 2013 5:26 pm**

Not sure if that is at altitude or not but take the engine to 10000rpm with a 300+ degree camshaft and I think you will see why ITB's make sense...

Sent from my iPhone 4 using Tapatalk

Posted: **Sun May 26, 2013 7:41 am**

Neuk wrote:Not sure if that is at altitude or not but take the engine to 10000rpm with a 300+ degree camshaft and I think you will see why ITB's make sense...
Sent from my iPhone 4 using Tapatalk

not many vw motor rev 10000rpm, to get to that cost big bucks and precision engineering, don’t know if there’s any in SA

135.96whp and 188nm at 1333m (4376 ft) altitude u-flo single throttle
and 136hp and 165nm at 1,645 m (5,397 ft) altitude x-flow throttles

Posted: **Sun May 26, 2013 12:29 pm**

cpichiptuning wrote:
Neuk wrote:Not sure if that is at altitude or not but take the engine to 10000rpm with a 300+ degree camshaft and I think you will see why ITB's make sense...
Sent from my iPhone 4 using Tapatalk

not many vw motor rev 10000rpm, to get to that cost big bucks and precision engineering, don’t know if there’s any in SA

135.96whp and 188nm at 1333m (4376 ft) altitude u-flo single throttle
and 136hp and 165nm at 1,645 m (5,397 ft) altitude x-flow throttles

None in SA that I know of, a few dabbled with 8000rpm and 9000rpm. Berg Cup is probably the best example of high rpm, ITB'd VW motors...

Sent from my iPhone 4 using Tapatalk

Posted: **Mon Aug 19, 2013 8:56 am**

Do these things work? There are performance versions and fuel saving versions.. Apparently just plugs in to your ODB port

Posted: **Mon Aug 19, 2013 3:34 pm**

gtidon wrote:Do these things work? There are performance versions and fuel saving versions.. Apparently just plugs in to your ODB port

lol

Posted: **Thu Nov 07, 2013 5:57 pm**

does having a aircon and power steering reduce the power of the car??? if so by how much???

Posted: **Thu Nov 07, 2013 6:15 pm**

zaheer786 wrote:does having a aircon and power steering reduce the power of the car??? if so by how much???

Power steering uses power while you are turning the wheels so it's not something you'd ever really notice.
Air con does pull a fair amount of power, but modern cars do kick the compressor out when you go full throttle.

Posted: **Thu Nov 07, 2013 7:30 pm**

always thought it was a major issue. thanx bud!

Posted: **Wed Feb 19, 2014 12:02 pm**

does a proper cone filter noticeably improve performance?
some people say its instantly noticeably.
others say its like 3-4kw gain max.

Posted: **Wed Feb 19, 2014 12:04 pm**

MickeyEngles wrote:does a proper cone filter noticeably improve performance?
some people say its instantly noticeably.
others say its like 3-4kw gain max.

definition of proper?

Posted: **Wed Feb 19, 2014 12:08 pm**

definitely not from autostyle firstly

but I know of many people fitting the honda s2000 filter?

Posted: **Wed Feb 19, 2014 12:11 pm**

MickeyEngles wrote:does a proper cone filter noticeably improve performance?
some people say its instantly noticeably.
others say its like 3-4kw gain max.

some pages before I asked a similar question. The answer is it depends.
To test for yourself do before and after dyno runs and decide.

*edit The only time you will see a benefit is if the standard (assuming a brand new standard filter) is causing a restriction.

Posted: **Thu Feb 27, 2014 9:25 am**

cpichiptuning wrote:2L 8valve
Mods:
OEM intake,MP9 TB & Air box
4 bar feul regulator
Bosch injectors 180cc
Piston size 82mm
OEM 2L Stroke
298 Estas Cam
Stage 2+ Flywheel
Viper 4into1 branch & 63mm full system
60-2 XMS4b Perfect Power Management with blue fire
LIQUI MOLY 4T Oil
NO ADITIVES!!! CLEAN 95oct Pump Feul

see below setup with throttles and compare to above,

throttles with xflow head or single throttle with u-flow head?

I don`t know specs on the x-flow motor below, rumor, maybe a 2.1L, will try to find out what mods are done on this below motor, this one makes

136hp and 165nm,

the setup above figures are
135.96whp and 188nm,

though not on the same Dyno,

DO You see the graph with the throttles look at it right at the end... see the way that it levels out right at the end. MY tuner told me in his experience if the graph levels out in the end , there is more ponies to be squeezed out of that setup

Posted: **Tue Mar 11, 2014 12:16 pm**

I heard this one alot recently around the track paint your exhaust run it hot their were the paint stops peeling off you can cut it their....
First of all what paint I work with paint every single day I could tell you types of paint quality make of paint all have a huge effect on how paint sticks i yjink that one is hugwash

Posted: **Tue Mar 11, 2014 12:38 pm**

Gvelo wrote:I heard this one alot recently around the track paint your exhaust run it hot their were the paint stops peeling off you can cut it their....
First of all what paint I work with paint every single day I could tell you types of paint quality make of paint all have a huge effect on how paint sticks i yjink that one is hugwash

Posted: **Tue Mar 11, 2014 1:20 pm**

scatman wrote:
Gvelo wrote:I heard this one alot recently around the track paint your exhaust run it hot their were the paint stops peeling off you can cut it their....
First of all what paint I work with paint every single day I could tell you types of paint quality make of paint all have a huge effect on how paint sticks i yjink that one is hugwash

Xoveracountable!!

Posted: **Tue Sep 02, 2014 10:25 am**

Gvelo wrote:I heard this one alot recently around the track paint your exhaust run it hot their were the paint stops peeling off you can cut it their....
First of all what paint I work with paint every single day I could tell you types of paint quality make of paint all have a huge effect on how paint sticks i yjink that one is hugwash

yeah no definitely, i agree fully you with!

Posted: **Sun Nov 09, 2014 11:25 am**

cpichiptuning wrote:
throttles with xflow head or single throttle with u-flow head?

I don`t know specs on the x-flow motor below, rumor, maybe a 2.1L, will try to find out what mods are done on this below motor, this one makes

136hp and 165nm,

the setup above figures are
135.96whp and 188nm,

though not on the same Dyno,
I think for throttles its only the sound of it, very close performance wise, but for me its the x-flo with throttles

i went from 106kw to 127kw by changing cam from 276 to 298 and adding throttles. same dyno.

Posted: **Mon Nov 10, 2014 11:27 am**

1.8iblackie wrote:i went from 106kw to 127kw by changing cam from 276 to 298 and adding throttles. same dyno.

Bud, just remember that you guys down at the coast have all the good air. Us okes up on the highveld battle to get the air flowing on N/A applications

Mythbusters.

A higher octane fuel is less flamable

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what perform the best? uflow or x-flow

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