boost problems

[matixx]

Hi. car is playing up a little bit. Have 2530 and turbosmart rocket launcher dual switch. Just started laggin the other day for no apparaent reason, and wouldn't boost till up in the 4500 -5000rpm. I thought shit, turbos ****ed! But when i switched the boost to high it came on perfectly normal? Boosted hard and pulled all the way? I cant figure out what would happen to have these effects? any ideas anyone?

[R31 POWER]

When you say laggin do you mean floor it thru first and slam second and boost takes longer than usual to build up to the setting you have? If so I have the same problem with the single stage one.

It only does it like sometimes but I would hate to lose a race becuase of it(on the track of course )

[matixx]

ts wierd, it takes twice as long to build up to half the boost. set at 10 psi on low setting, and at 5000rpm when it should have been at 10psi for 2000 rpm, its just slowly ticking up to 5 psi. But switch the switch and 19 pound at 4k? Dunno whats going on. I know these pneumatic systems are a little unstable and dont hold boost pressure as well as a ebc or external gate, but never had this problem before

[matixx]

maybe the wastegate is opening prematurely for some reason? why wouldnt this be the same as on the high boost setting thou?

[R31 POWER]

Come on guys someone must have this problem,if the switch in on it's fine,with it off it lags.

[SeriesIIGTST]

you got front mount? heat soak? maybe with more boost it just pushes the hot air through quicker and therefore still spools up relatively quick. 10psi isn't much boost to be running through an HKS turbo.

[51jay]

Mine did that too never did find out why but it was the main reason I went over to the Audi DIY..... Make sure the wastegate is held fully shut and check for gasket leaks.

[matixx]

yeah have good front mount, but drove today and problem seems to have gone? must be a glitch in the matrix

[vendetta]

imy car is standard as just exhaust and pod and for some reason i get th e same feeling that its lagginf like hell. i step on it then seems like its going no where, when it reaches like 4500 or 5 then u can feel it boot it harder. when i dump it from like 4th into 3rd or second then it feels normal. Anyone have an idea, the turbo isnt gone theres no smoke what so ever. cant really seem to sus out a boost leak anywhere but ive only check the easy visual areas. Putting a front mount on next week maybe that might fix it??

[SeriesIIGTST]

vendetta, i had a somewhat similar experience with mine, seem to be lagging, waiting for an invitation to boost, then it would come on. I popped my bonnet and had a listen and my turbo bearings are on their way out, make a delightful crunching noise when spinning. Noise is definitely turbo as I can hear it when i put a screwdriver to the turbo (put screwdriver on cover then ear on screwdriver to listen). I hope for your sake that the turbo isn't the problem as it is with mine....

[vendetta]

ill suss it out but i dont hear any major noises or anything that sounds like bearings. hope not too. i was gonna get a power fc but now the money will probly have to go to a turbo!!!

[vendetta]

hey seriesiigtst did you have your car on a dyno to suss it out or your just played with the throttle and reved it up

[SeriesIIGTST]

Mine's that bad, i can hear it at idle! But other than that, it felt wrong when driving it as i said so i took it home and played with throttle and listened. Then took to turbo shop for second opinion who tells me my turbo is a "time bomb".

[BHDave]

I have had this problem on the single stage switchable turbosmart.

Turned out to be the ball valve in the tee piece wasn't allowing the pressure to escape from the actuator and was holding open the waste gate. I removed the ball and spring from the tee and low boost setting worked properly again.

You shouldn't have this problem though as the low boost bleed should be allowing the pressure to get away. I didn't have a low boost adjustment so the pressure just sat there.

May be worth a shot anyway.

[R31 POWER]

I took out the ball and spring and it still did it and it only went to 12 psi with the switch off and or on,also it did'nt spike over 15psi.

I just leave the switch on now,I say meh to the standard joke of a turbo.

[ABuSD]

i have a 2 stage, turbosmart controller, and i too have this problem, but not in 1st gear, that seems fine, then 2nd and 3rd take forever to hit fullboost, i bought the car with Blitz front mount, and the turbo was apparently hi flowed with steal blades.

[RBVS]

delete

[BHDave]

You may have the ball valve issue that i mentioned in my earlier post.

If you remove the ball and the car still has probs then you can put it back in. It's an easy check.