Mythbusters.

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Re: Mythbusters.

Post by jason gunn » Thu Oct 27, 2011 9:27 pm

i agree and disagree wit the boost pipe and cooler theory coz u need to fill a grater area up meaning ur turbo will work harder to fill it on the start of + boost coz u now filling a (eg 2l drum wit a 50mm pipe now wit the same 50mm pipe u filling a 6l drum 6l will take 3x longer so in 2 secs u will fill that same 2l drum wit 2l of air but the 6l drum still hase 4l to go yes it was 50% full to start coz it needed air to breath but it was at -2 vac so yes and no for me
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Re: Mythbusters.

Post by jason gunn » Thu Oct 27, 2011 9:28 pm

has not hase
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Re: Mythbusters.

Post by Abnormal » Fri Oct 28, 2011 7:18 am

jason gunn wrote:has not hase
while you are at it you should check out

wit
coz
u
ur

ps there is an edit button.
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Re: Mythbusters.

Post by Jetta2 » Fri Oct 28, 2011 7:27 pm

jason gunn wrote:i agree and disagree wit the boost pipe and cooler theory coz u need to fill a grater area up meaning ur turbo will work harder to fill it on the start of + boost coz u now filling a (eg 2l drum wit a 50mm pipe now wit the same 50mm pipe u filling a 6l drum 6l will take 3x longer so in 2 secs u will fill that same 2l drum wit 2l of air but the 6l drum still hase 4l to go yes it was 50% full to start coz it needed air to breath but it was at -2 vac so yes and no for me
Not even Dr Sheldon Cooper can understand what you wrote there dude :bang:
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Re: Mythbusters.

Post by vwpro » Fri Nov 04, 2011 6:03 pm

Jetta2 wrote:
jason gunn wrote:i agree and disagree wit the boost pipe and cooler theory coz u need to fill a grater area up meaning ur turbo will work harder to fill it on the start of + boost coz u now filling a (eg 2l drum wit a 50mm pipe now wit the same 50mm pipe u filling a 6l drum 6l will take 3x longer so in 2 secs u will fill that same 2l drum wit 2l of air but the 6l drum still hase 4l to go yes it was 50% full to start coz it needed air to breath but it was at -2 vac so yes and no for me
Not even Dr Sheldon Cooper can understand what you wrote there dude :bang:

your 6l drum is already full you must just replace it, thats what the turbo does the moment it start moving
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Re: Mythbusters.

Post by Chadilax » Sun Jan 08, 2012 12:50 am

Hi Guys would just like to introduce myself as I am new here and to say wow this is a great thread, learnt so much!
Thanks guys!

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Re: Mythbusters.

Post by 38 » Tue Mar 27, 2012 4:03 pm

Dear Panic,

A mechanic once told me that the timing on my vr is out and that it should be set.

I then told him that i was under the impression that the Mgmt does it by itself and that the knock sensors play its part there.

He looked at me funny.

Is this true? :grin:
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Re: Mythbusters.

Post by Balls » Thu Apr 19, 2012 3:16 pm

"Engine mods and software will make a car more fuel efficient"

:tosser:

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Re: Mythbusters.

Post by Stu » Thu Apr 19, 2012 3:19 pm

Balls wrote:"Engine mods and software will make a car more fuel efficient"

:tosser:
well in some setups and circumstances it can
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Re: Mythbusters.

Post by Jetta2 » Thu Apr 19, 2012 3:51 pm

Stu wrote:
Balls wrote:"Engine mods and software will make a car more fuel efficient"

:tosser:
well in some setups and circumstances it can
My Jetta uses less fuel when cruising and daily use with a 2.0 turbo motor than it did with the original 1600 carb motor.
And there are tons of guys who have done mods and software to all sorts of cars and get better fuel consumption when driving decently than when the cars were stock.

Granted, when you put foot, that fuel consumption goes straight out the nearest window.
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Re: Mythbusters.

Post by VWicked » Thu Apr 19, 2012 4:20 pm

I got one. So i saw Dirty Harry's post about fuel consumption etc and I agree and posted there as well that small motors in heavy bodies give [email protected] consumption BUT,

Lets compare his mk3 GS 1.6 which is around 10l/100km to a Ford Bantam 1.3. So i owned that GS for a bit before Harry got it so I remember that its weight is around 1050kg's. Now this Bantam as per the disc is 1000kg and is 1.3. We have been using it for the past two weeks in commute from Midrand to JHB CBD in traffic etc and we have been getting 6.5l/100km and that driving it as we please!

So question is small engine heavyish body? Why the difference apart from the capacity? Would a mk3 GS be lighter on fuel if it had a 1.3 say?

I get the whole 2.0 has more power and so on and how that would be lighter but why is the 1.6 motor sitting out like a sore thumb?
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Re: Mythbusters.

Post by PoLonY » Thu Apr 19, 2012 4:28 pm

bantam 1.3 is rated at 55kw...doesn't take a lot of fuel to make that power :lol:

My bantam i got 700km off a 55l tank regardless of load, revs etc
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Re: Mythbusters.

Post by VWicked » Thu Apr 19, 2012 4:39 pm

1.6 golf carb is 60kw right?
Have you had your bottle of Hatorade today?

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Re: Mythbusters.

Post by Life160 » Thu Apr 19, 2012 5:58 pm

VWicked wrote:1.6 golf carb is 60kw right?
without the bolt on cone filter...
:)
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Re: Mythbusters.

Post by Wit Ark » Sat May 19, 2012 1:46 pm

Back in the day when my golfie was still a stock 1.3.carp (ja die een wat jy in die dam vang!) me and a friend both took on a long distance trip, she was driving in a stock 1.6i life, we were following each other and cruising at 160ave, that meaning my poor car was redlining in 4th gear nearly all the way to keep up, while she was cruising quite comfortably in 5th gear. I used about 1/3 more fuel for the trip.

When i first got the 2l it was fitted with a fully worked head, didn't have the cam yet so i couldn't wait and fitted a stock cam for time being, did some highway driving then, got caught in a heavy rainstorm and was forced to slow down to like 80-100km/h, got something ridiculous close to 15km/l, the i was still running carburetor on the 2l, would have been even better if i had Fuel Injection fitted then. Now consumption with cam and a heavy foot is like 5km/l on a good day. Car is now only mapped on Wide Open Throttle so even if i drive nicely it hardly makes any difference to fuel consumption.
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Re: Mythbusters.

Post by Troy » Tue Oct 09, 2012 10:24 am

Nice forum. Im new to this. looks like im on the right track of getting some info
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Re: Mythbusters.

Post by VWicked » Tue Oct 09, 2012 10:26 am

Troy wrote:Nice forum. Im new to this. looks like im on the right track of getting some info
Welcome, glad you enjoyed this thread, it should save you some good money on paying school fees to learn what works and whats a myth...
Have you had your bottle of Hatorade today?

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Re: Mythbusters.

Post by Scatman » Tue Oct 09, 2012 10:50 am

Troy wrote:Nice forum. Im new to this. looks like im on the right track of getting some info
Hi and welcome to the forum! :hi:

Please feel free to test any of the theories you may have heard regarding cars here, that way we all can learn more about cars in general. I hope you enjoy your stay here!
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Re: Mythbusters.

Post by nacho! » Thu Nov 01, 2012 1:54 am

I have one... adding an intercooler to a turbo diesel setup will decrease the intake temps and increase power and torque,
would this however reduce the EGT temperatures or because more power is produced will it run hotter with the intercooler?

Panic should know this one. It's a Land Cruiser 80 vx TD thing :driving:
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Re: Mythbusters.

Post by BIGMIG » Thu Nov 01, 2012 6:45 am

nacho! wrote:I have one... adding an intercooler to a turbo diesel setup will decrease the intake temps and increase power and torque,
would this however reduce the EGT temperatures or because more power is produced will it run hotter with the intercooler?

Panic should know this one. It's a Land Cruiser 80 vx TD thing :driving:
Did it not come with an intercooler from the factory?
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Re: Mythbusters.

Post by Scatman » Thu Nov 01, 2012 8:23 am

nacho! wrote:I have one... adding an intercooler to a turbo diesel setup will decrease the intake temps and increase power and torque,
would this however reduce the EGT temperatures or because more power is produced will it run hotter with the intercooler?

Panic should know this one. It's a Land Cruiser 80 vx TD thing :driving:
I think the EGT's would remain basically the same, as it is a component of the amount of diesel you inject into the engine. The more diesel you throw into the engine the hotter it runs, and the leaner the mixture, the cooler it runs. I doubt the power gains from the intercooler would be negated by the (possibly) increased EGT's.

Let's hear what the other guys have to say.

I also have a myth:
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Re: Mythbusters.

Post by nacho! » Thu Nov 01, 2012 5:08 pm

BIGMIG wrote:
nacho! wrote:I have one... adding an intercooler to a turbo diesel setup will decrease the intake temps and increase power and torque,
would this however reduce the EGT temperatures or because more power is produced will it run hotter with the intercooler?

Panic should know this one. It's a Land Cruiser 80 vx TD thing :driving:
Did it not come with an intercooler from the factory?
Nope, AFAIK none of the 80 VX Turo Diesel models had one standard. Only after 1997

So I guess if one only adds an intercooler ( without tuning the fuel pump), the EGTs would run cooler. Thus one can increase boost! :evil:
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Mythbusters.

Post by vwpro » Sat Nov 03, 2012 12:49 pm

interesting facts:

Depending on the build, bigger is almost never better so rule of thumb is always use the smallest turbo that is capable to accomplish the biggest task if you understand what I mean.

The right size turbo in its comfort zone it always outperform a bigger turbo, in a uncomfort zone
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Re: Mythbusters.

Post by 1.8iblackie » Sat Jan 12, 2013 8:30 pm

vwpro wrote:interesting facts:

Depending on the build, bigger is almost never better so rule of thumb is always use the smallest turbo that is capable to accomplish the biggest task if you understand what I mean.

The right size turbo in its comfort zone it always outperform a bigger turbo, in a uncomfort zone
this is very true. my previous turbo had a t60-1 compressor wheel and it worked fine but because the wheel is made to flow a mother load more than i was using i was running it in a very un efficient part of the compressor map and that meant alot of heat in charge air.
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Re: Mythbusters.

Post by JETTA 1 » Sun Jan 20, 2013 1:56 am

Geeez, never to old to learn. Thank's PM, learned a lot from all the myth's.

slakkie wrote:
BlueBlob wrote:Here's 4 more:

7) Big intercoolers or long boost pipes give more lag. Crap.
8) the whole 8V makes more torque than 16V thing. Crap.
9) You can raise the octane of your fuel significantly by adding 7ml of some liquid. Crap.
10) Boost puts more strain on engines. Crap.


edit: Nice thread, by the way.
I agree on point 8... See this post... http://www.enginesforsale.co.za/?p=49
And look at the dyno sheet.

Then Slakkie, thank's for the link. Very help full and educational.
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