Offer to Brisbane Polo GTI owners

[Sharkie]

Mine has Forge TIP also.

Dave

Sorry yes, mmmm, will need another car as a chipped only example then

[VW GTI]

I would like to try stock diverter, my Forge replica and R1 on the day to see any differences (if any)

I think this might be more something you would need to do on a different day. Changing (even the easiest) parts isn't exactly that quick, and it wouldn't be worth taking the car off while you fit it as that would also waste time.
Obviously it depends on the timetable but surely the 1 part can't make too much difference given that by the 3rd one your car would be warmer and heatsoak could effect the figures making it look worse. It's not exactly a major power increasing mod.

[Guy_H]

Dont worry too much - the forge tip makes little difference in HP / Torque so its not going to be a big factor. The intake differences we will see form the Airflow - Grams per second so it won't be too hard to work them out!

You will see the same with the DV - there is no increase in HP, but what you do see is how clean it is when you back off the throttle and it has to open & close.

If we still have our Polo, we will bring it - its 100% stock now!

[GT3]

If we still have our Polo, we will bring it - its 100% stock now!

..safe to say it's properly run in now too

[Sharkie]

Changing a diverter takes 5mins. Doing 5 runs an hour means on average 1 every 10mins with 10mins for positioning the car on the dyno itself. So, it can easliy be done.

As per the previous dyno day, all the FMIC cars had 3 runs and every one made more power on the 3rd run than the 1st..... All the SMIC cars dropped in power for every consequtive run, the only difference was 1 that had the bonnet opened for the 3rd run.

My main reason is that if you have a boost gauge you will see boost spike at around 1.2-1.3bar on a chipped car and and then eventually taper off to about .9bar. According to Guy all the GTI's does this. I would like to know if it is due to a weak actuator spring (as suggested by Shane) or the diverter. If we could determine that some diverters prevent this then it actually becomes a major power mod.

1.3bar makes much more power than .9bar

[VW GTI]

If we still have our Polo, we will bring it - its 100% stock now!

You unchipped it? Surely that's a really cheap way (for you) of increasing sale value?

[Sharkie]

If we still have our Polo, we will bring it - its 100% stock now!

It's still chipped though ? (can be if we need it I suppose)

Also, if you still have the CDA from it, could be worthwhile attaching it to 1 of the cars and run it "dodgy KAI" way in place of the other intakes to the front (bonnet open) just to see the difference for a laugh....

[Guy_H]

You unchipped it? Surely that's a really cheap way (for you) of increasing sale value?

It can be chipped or unchipped - just takes us 20 minutes!

[shaneth]

Now to get the best data, obviously cars with the same software but different mods to see the difference that the hardware makes.

I would love to run mine but the above quote may rule me out. So its better if the spot goes to someone else in case.

[RhysQ]

depending on the date and whether or not i will be back from o/s, i could be both the 'just chipped' and stocko cos i just have the APR ECU (obviously which can be switched off).

[VW GTI]

depending on the date and whether or not i will be back from o/s, i could be both the 'just chipped' and stocko cos i just have the APR ECU (obviously which can be switched off).

You better take that pesky BOV out too

[RhysQ]

You better take that pesky BOV out too

PESKY.....pfft

yeah i could do it on the day, i have the stocko in the boot....only takes about 10 mins to change over.

[GT3]

since there's going to be some testing of Polos with different levels of mods, I'm curious what ppl think of the following case studies -

- Timbo's Polo has hit 136 atw on two different dynos, with just an ECU flash and 3" dp. Any explanations for this??, eg higher psi.

- While I never dynoed mine with just the APR flash alone, my first dyno was just flash/CDA, and only got 120 atw. Then with FMIC (133.5) and then exhaust (145). Would it be fair to say that, rather than these mods 'adding' 12+ kw atw each, they were more the result of a cumulative effect, ie 133.5 not possible without the CDA etc.

I'm hoping this can lead to some interesting discussion about why some Polo GTI power outputs diverge considerably.

[VW GTI]

- While I never dynoed mine with just the APR flash alone, my first dyno was just flash/CDA, and only got 120 atw. Then with FMIC (133.5) and then exhaust (145). Would it be fair to say that, rather than these mods 'adding' 12+ kw atw each, they were more the result of a cumulative effect, ie 133.5 not possible without the CDA etc.

I'd say the 120kw atw is lower than you'd expect (Rhys got 122kw atw with just the flash).

Then the others may have been higher than expected, making them look really good.

[GT3]

I'd say the 120kw atw is lower than you'd expect (Rhys got 122kw atw with just the flash).

Then the others may have been higher than expected, making them look really good.

no my point is that some mods on their own don't do much, eg CDA. But a combination of mods begin to really free up power. This test could help determine which mods are the best way to achieve that (and in what order).