Tigger73's 125TSI Tiguan Build Thread

[Ramee]

It's not just the core thickness that matters. There are some subtle diffrence between a 38mm GTI intercooler & an S3/TT-S IC. Personally, if you have the 38mm GTI IC the next step would be one of the aftermarket providors.

What I have LOL'd at are those folks that have gone from Golf R/S3 plastic tank to S3 all alloy and claim they can feel an improvement. By all accounts the plastic tank unit performs slightly better.

I am not sure about that one. If you consider 155 TSI tiguan has similar intercooler to GTI Mk6 then according to my logs there is a substantial improvement of reducing intake temps when change to all aluminum S3.

Please check my logs.
Ramee's Tiguan Build Thread 155KW DSG

While I agree that aftermarket bar and plate type intercoolers are more efficient S3 aluminum ones are still an improvement.

I think those 125/ 135 Tigs have mk5 GTI type intercoolers which are 32mm core width.

[tigger73]

I am not sure about that one. If you consider 155 TSI tiguan has similar intercooler to GTI Mk6 then according to my logs there is a substantial improvement of reducing intake temps when change to all aluminum S3.

Please check my logs.
Ramee's Tiguan Build Thread 155KW DSG

While I agree that aftermarket bar and plate type intercoolers are more efficient S3 aluminum ones are still an improvement.

I think those 125/ 135 Tigs have mk5 GTI type intercoolers which are 32mm core width.

Yes definitely there is a difference and your logging does prove there is a difference in intake temps so makes the $ spent and 6 hours to do the install worth it.

I think you're right that the 125/132 get the lower spec intercooler (though would like to confirm with a 132 owner). So for me it was a certainly a good thing to do. The car does feel different, but dyno will tell if this is anything significant. It doesn't feel like it's unleashed a heap more horses - just gets there easier.

I believe the various aftermarket tunes are quite effected by intake temps as far as how aggressive they run things (i.e. back off when it gets hot). So hopefully it'll keep making decent power in the warmer days. I'm not expecting a miracle when ambients are 45 deg C though.

[tigger73]

Well did some timed runs with the autopolar today and I reckon the intercooler has conservatively knocked off 0.3sec from the 0-100 time.

One of the best mods yet and highly recommend to anyone with a 32mm core/125tsi.

Will be interested to see how it goes at the dyno day in a couple of months.


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[Ramee]

Well did some timed runs with the autopolar today and I reckon the intercooler has conservatively knocked off 0.3sec from the 0-100 time.

One of the best mods yet and highly recommend to anyone with a 32mm core/125tsi.

Will be interested to see how it goes at the dyno day in a couple of months.


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To get 0.3 sec improvement I think you need to get at least ~20 extra hp. My experience is those ECU /OBD based 0 to 100 testing is bit unreliable. You may want to verify that with a GPS based unit.

[tigger73]

To get 0.3 sec improvement I think you need to get at least ~20 extra hp. My experience is those ECU /OBD based 0 to 100 testing is bit unreliable. You may want to verify that with a GPS based unit.

Yes will definitely do some GPS based times to verify but having said that I did some foot to the floor time and got 6.7sec whereas before had never been able to get under 7sec.

Plus launch was always about 6.2sec on the autopolar and got a 5.799sec today.

Agree that the absolute numbers may not be accurate but relative numbers are pointing to some significant gains (or in my case removing some significant losses).


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[Ramee]

Yes will definitely do some GPS based times to verify but having said that I did some foot to the floor time and got 6.7sec whereas before had never been able to get under 7sec.

Plus launch was always about 6.2sec on the autopolar and got a 5.799sec today.

Agree that the absolute numbers may not be accurate but relative numbers are pointing to some significant gains (or in my case removing some significant losses).


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Definitely you should be getting significant gains considering intercooler was being the bottleneck in your system. I think boost drop through your old intercooler is very high considering high flow rates involve in Stage 2 tune. So there is your missing 20 hp you were complaining right there.

[tigger73]

Definitely you should be getting significant gains considering intercooler was being the bottleneck in your system. I think boost drop through your old intercooler is very high considering high flow rates involve in Stage 2 tune. So there is your missing 20 hp you were complaining right there.

Yes I thought I was down around 15kwaw to where I thought I should be and it was all down to the intercooler causing a big restriction in the system. Will be really interested to get it back on the dyno. Should be 150+kwaw now.



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[brad]

I guess if you've done intake & DP/exhaust then yes the 32mm IC will be a killer. I still can't see how going from 38mm plastic to 40mm alloy would make a huge difference but your logs prove me wrong so happy days.

Have you changed the IC charge/discharge pipes to the round units yet?

0-100 relies too much on reflexes & ability to change gear quickly (you guys probably have auto & launch control so maybe not).

When I did the stage1 Bluefin on the Octy I just did in-gear rolling runs as it took the driver & gear changes out of the equation & doesn't stress the car as much with clutch dumps & quick changes.

I should do this again soon before I fit the IC to see what difference the charge/discharge pipes; intake mod & DP mod have made.

40-120 in 3rd gear. 40kmh is just off boost at just on 1500rpm (didn't really look).
Before: 10.99 / 10.92 / 10.96 - call it 10.95?
After : 8.82 / 8.80(det)/ 9.02 - call it 8.95?
~2 seconds/ 18% reduction

40-140 in 4th gear. 40kmh is way off boost at about 1000rpm
Before: 14.99 / 14.74
After : 13.79 / 13.48 / 13.72
Call it 1 second better? 6% improvement?

Then as an afterthought (and because the pull was so bloody addictive) we did an 80-120 run in 3rd. Sweet Jesus, Mary & Joseph!!!
4.83/4.32/4.26
/searches - dumb comparison but an M5 does 80-120 in 4th in 4.8seconds
Wheels 3rd gear times - Porsche Boxter S = 4.7s; Mazda RX8 = 4.6s; 350Z = 4.1s; Mazda 6 MPS = 3.6s
So around 4.5s seems quite respectable for a near 1.5tonne, 1.8L shopping trolley.

[Ramee]

I guess if you've done intake & DP/exhaust then yes the 32mm IC will be a killer. I still can't see how going from 38mm plastic to 40mm alloy would make a huge difference but your logs prove me wrong so happy days.

Have you changed the IC charge/discharge pipes to the round units yet?

Haha! Everybody knows those round pipes and stock ones have almost same cross section area. So no point of spending money for nothing I only will consider IC discharge pipe if I ever install water Meth kit as it is pre drilled for WM nozzles.

[brad]

Haha! Everybody knows those round pipes and stock ones have almost same cross section area. So no point of spending money for nothing I only will consider IC discharge pipe if I ever install water Meth kit as it is pre drilled for WM nozzles.

Actually, they haven't got "almopst the same x-sectional area". Mine are about 10% bigger when measured at the largest point. The difference is much greater when measured at the smallest x-section. The pancake pipe is worst for this as the x-section is all over the shop. Mine also removed a restriction between the turbo & the pancake pipe.

None of these smaller mods make huge differences in isolation but as a sum-of-the-parts equation it all starts to add up with regards to either power or driveability.