20vpolo gt 3076 small problem

[20vpolo]

Just been out for the first time to do a bit of mapping and first impressions are very very good.

There is hardly anymore lag than the previous turbo and it pulls like a train.


The problem is its boosting to 1.2 bar + by 4k but at 5k the boost has dropped off to 0.8 bar and does seem to rise any more.

What could cause this ?

 

[caney]

Just been out for the first time to do a bit of mapping and first impressions are very very good.

There is hardly anymore lag than the previous turbo and it pulls like a train.


The problem is its boosting to 1.2 bar + by 4k but at 5k the boost has dropped off to 0.8 bar and does seem to rise any more.

What could cause this ?

actuator i think mate probably needs adjusting?mrc had a similar problem with mine not holding boost at the top end and iirc they mentioned adjusting the rod.i'm sure Bill will be along to help

 

[ibizacupra]

Just been out for the first time to do a bit of mapping and first impressions are very very good.

There is hardly anymore lag than the previous turbo and it pulls like a train.


The problem is its boosting to 1.2 bar + by 4k but at 5k the boost has dropped off to 0.8 bar and does seem to rise any more.

What could cause this ?

what have you changed?
whats the actuator pressure?

 

[20vpolo]

Problem sloved I had made a school boy error and crossed the 2 pipes from the solenoid to the turbo and actuator.

I hope that will have fixed it. I will be out in the polo with a friend tonight to finish the mapping so will know for definate then.

Cheers

 

[20vpolo]

Been looking at my data I have logged and I was wondering what intake (manifold) temps you run (1.4 bar)

I mine are low 20s to mid 30s without the meth / water injection.

How do they compare to yours ?

 

[ibizacupra]

mine were similar... but I dont remember ambients.. I think last logs I did was summer so 20'c ambients, and 30-35'C under boost on 1.6bar and mid 40-45'C on 2.2bar - no water/meth

 

[20vpolo]

just got back from mapping at 1.8 bar with 104 octane fuel and am very very happy with the result. It blew a turbo hose off but I think I have this sorted now.

intake temps were 32-37 deg c at 1.8 bar.

Looking forward to the weekend now to she how it performs at Yoek raceway. Praying for good weather

 

[caney]

just got back from mapping at 1.8 bar with 104 octane fuel and am very very happy with the result. It blew a turbo hose off but I think I have this sorted now.

intake temps were 32-37 deg c at 1.8 bar.

Looking forward to the weekend now to she how it performs at Yoek raceway. Praying for good weather

look out for a vinyl wrapped TT with a huge jbs sticker in the rear window! he's hoping for 11's now he's gone bigger turbo+nos.

 

[ryan_s3]

look out for a black fto ,i would imagine in the 10s .

 

[Willie]

How did you get on then?

 

[20vpolo]

not the best, sunday I was just making a few gentle runs to make sure everything was ok. When i was sure everything was running fine a turned the boost up and it blew a hole into the silicon hose off the turbo. Managed to make a temp fix on sunday night but monday brought another little problem. For some reason the crank sensor started to lose its signal at about 5.5-6k rpm so the carthe car would not rev past this point.

Some how I still managed to win my class with a 12.2 but was very dissapointed , with the crank sensor fault I had already lost .5 sec in the first 60ft.

 

[Willie]

Not too bad then according to your 11.30secs.
Once all is up and running should be bigger and better times

 

[marky t]

not the best, sunday I was just making a few gentle runs to make sure everything was ok. When i was sure everything was running fine a turned the boost up and it blew a hole into the silicon hose off the turbo. Managed to make a temp fix on sunday night but monday brought another little problem. For some reason the crank sensor started to lose its signal at about 5.5-6k rpm so the carthe car would not rev past this point.

Some how I still managed to win my class with a 12.2 but was very dissapointed , with the crank sensor fault I had already lost .5 sec in the first 60ft.

hi which polo do you have then as we go to york a bit is it the black rear wheel drive one? are you going to the may bank holiday event?

 

[str8ballin]

not the best, sunday I was just making a few gentle runs to make sure everything was ok. When i was sure everything was running fine a turned the boost up and it blew a hole into the silicon hose off the turbo. Managed to make a temp fix on sunday night but monday brought another little problem. For some reason the crank sensor started to lose its signal at about 5.5-6k rpm so the carthe car would not rev past this point.

Some how I still managed to win my class with a 12.2 but was very dissapointed , with the crank sensor fault I had already lost .5 sec in the first 60ft.

Oh I wish I could get a 12.2 in my Polo!!!

How did it make a hole in the hose!?

 

[20vpolo]

hi which polo do you have then as we go to york a bit is it the black rear wheel drive one? are you going to the may bank holiday event?

Yeah thats the one bud. Cant make the one at the beginning of May as im offshore but will be at the event at the end of May.

 

[20vpolo]

Oh I wish I could get a 12.2 in my Polo!!!

How did it make a hole in the hose!?

I dont know it, kind of destroyed the inside of the hose and blew a hole in the outside. I am going to get it hard piped for the next meeting and just have silicon couplers.

 

[ibizacupra]

Oh I wish I could get a 12.2 in my Polo!!!

stick the engine in the back, or do the 1/4 in reverse, with 5 reverse gears and 1 fwd

 

[ryan_s3]

what was your 60ft time and terminal on your 12.2?

 

[20vpolo]

2.3 secs. I was pulling 1.8 constantly last year and 1.78 was my best

 

[ryan_s3]

terminal speed was?