Denmark

iTrader: (2)

Hi All,
I know there is alot of frontentry TD05 on the my99/my00 imprezaīs now!!
The Q is,am I the only one with compressorsurge on that???
Itīs a real shame when it can have a really fast spool up.....
It seems that i canīt take it past 1,1bar/4200rpm if i do that it makes surge...

What can i do to overcome this?.

If i use a dawes to make it fast to 1,1bar and then use the linkecu to do the rest,just how shall i connect it to do so.

Is the TD05/06 better in this field??

Thanks for all info.
Skassa

AndrewC

Skassa,

Not sure about the surge, I know some of the Scottish TD05 users have also had problems.

I have also thought about using a Dawes in conjunction with the Link, if you tee off a bleed line to a 2 port solenoid from before (or after) the dawes you should be able to use the link to increase boost in a specific rpm range whilst still allowing the turbo to spool as fast as it can in every gear and allow you to reduce the boost at the top end. I can't see why it should matter whether you bleed air away before or after the dawes.

There is a neater solution though, if you want the baseline (ie Dawes controlled) boost to be 1.1bar, then just fit a 1.1bar actuator!

I suppose the advantage of using the dawes aswell is that you can adjust the baseline easily.

Andrew...

john banks

I had to hold mine back to 1.4 bar until 3800 RPM after which I ran it at 1.7 bar without problems, but I was running OEM headers.

The TD05/06 20G is a little more surge prone, but I am not sure why you are getting the problem at only 1.1 bar. Is this on full throttle?

Denmark

iTrader: (2)

Hmm,
I can read that all of You can make much more boost without surge than mine,and i cannot figure out whatīs cosing this on mine only.
I also had boostcreep till i ported the wastegate both on the TD05 and the VF29

It all started when i put on a MRTinletpipe !!!!.

It canīt be the zorst that is to restrictive as i got a 3"openneck Dp and and HKS hiper.

Any other info??
Skassa

john banks

Puzzled. Is it full throttle only?

nom

Still on standard headers though? Aftermarkets can make a big difference to potential flow, screwing up the comparative compressor surge@boost point.
Still sounds a tad low, though!

Denmark

iTrader: (2)

Yep

Full throttle only!

And Supersprint manifold

Skassa


[Edited by Denmark - 8/15/2003 11:41:59 AM]

EMS

I mapped today a MY99 with Supersprint manifold and TD05. 1.4 bar from about 3700 RPM, no probs! Are you sure you have surge? Normally you can spool these turbo's with wastegate closed until boost target is reached without surge. (except for part throttle)

Mark.

Bob Rawle

Probably not surge, what bov and what pressure will it hold

bob

carlos_hiraoka

Mark, didn't know that the TD05 had surge problems even with partial throttle.

Carlos H.

Denmark

iTrader: (2)

Hmm i have been thinking that it might be the BOV thatīs the problem....

I donīt know wich brand it is..,itīs from Italy and is blue and red..dobble piston type.....I got it for free(maybe thatīs the problem)

What BOV do You recomend ??...Not for sound,but it has to be VTA,becourse i have no return pipe anymore,becourse of the extra crankbreather on the V7 block.

Thanks
Skassa

carlos_hiraoka

actually try ..... WITHOUT A BOV ..... it is MUCH BETTER

Carlos H.

Denmark

iTrader: (2)

I was planing to try it later today,to see if that cures the problem...


Thanks,
Skassa

WREXY

I think your BOV is Bonulume. (Not sure on spelling). They come from Italy. I've seen them here in Greece as well. A m8 of mine had one on his Punto GT and had problems.

Blitz ones are very good. Have one on my car with VF 23 turbo. No problems whatsover after 3 years.

Cheers,

George.

Denmark

iTrader: (2)

I have just tjecked with the supplier of the BOV, and it is that one..

I will still like to know what other BOV that are working..


Thanks,
Skassa

Andy.F

Agree with Carlos, try it without a BOV. There are a few people using Forge VTA valves without problems.

Andy

Denmark

iTrader: (2)

Thanks,
I will give it a go,when i get home from work!!

Thanks,
Skassa

AndrewC

Skassa,

Did you resolve this? Was it the BOV?

I now have a MBC and was think of trying a hybrid boost control using this in conjunction with the Link, have you tried anything like this?

Andrew...

Denmark

iTrader: (2)

Andrew,

I have just purchased a new forgeVTA and even if iīm running it with the red spring,there is still compressorsurge,
but maybe what iīm hearing is not surge??,
The sound is like itīs comming from the Knfilter on wot,but only in 5th and 6th gear.

What ever it is,itīs not showing on a datalog,from the link!!

Right now iīm driving with a dawes device,and i makes really good spoolup

Skassa

Jack0

SKASSA,
May be a long shot, but how confident are you with the MRT inlet pipe?
I have had probs in the past with replacement Silicon intake pipes which causes probs with WOT Boost and compressor noises due to hose collapse.
The only way I diagnosed this is upon a dyno, looking under the bonnet, watching the hose suck in and out.
Point to note, that this is not uncommon when upping boost, AUDI's/SEAT's also suffer with their OEM offerings....
Just a thought.....

Jacko.

nom

The MRT pipe is strong - it doesn't collapse under boost. Well, I've never heard of one doing it anyway
I was wondering if we might get a description of the noise? The easiest way to get round the surge problem is to work out it isn't surge

AndrewC

Skassa,

As Jacko says are you sure the K&N isn't too restrictive, have you tried connecting a vacuum gauge to the inlet pipe to see if there are any pressure fluctuations?

Andrew...

Jack0

Borrow an induction Kit and then try it.
However, you will have to try and differentiate between induction noise and comp surge.
I bet this will resolve the issue you are having....Ģ10 anyone..?

Jacko.

Denmark

iTrader: (2)

Jacko,

The one i have on my car is a indution kit.

Itīs a KN 57Ikit.....Thatīs the filter thatīs rated a 350hp.

The sound is like a fast "flutter" (Tuf-tuf-tuf-tuf)

And itīs only there from around 3800-4200rpm on wot in 5th and 6th gear.

Skassa

SiHethers

Skassa

The tuf-tuf-tuf... noise sounds very much like surge. Very odd as if it was due to a collapsing inlet pipe, you would expect the collapse to get worse with greater airflow. It's not as if the airflow is likely to be low at 1.1bar and 3800rpm in any case. Is it definately a straight td05, and not some sort of td04 hybrid (I know its very unlikely) or something with a bigger compressor?

Simon

[Edited by SiHethers - 9/13/2003 8:45:08 AM]

SecretAgentMan

Hello Skassa!

I've got the FE05 on my car, along with a HKS RS ki and a Samco inlet hose (which doesn't seem to be of the collapsing variety ).

1 bar @ 3100 rpm
1.5 bar @ 3500 rpm

GT Spec 4-1 header and upppipe.
Dawes controlling boost - no surge whatsoever.

....and no BOV either...

/J

Denmark

iTrader: (2)

I have actully talked to Kn in Denmark,what the filter in the kn kit is good for in HP,and the answer is 350hp(when itīs new),And iīm not there yet(336hp)

I could try to run it without it to see if it makes a difference.

Any other inputs?

Thanks,
Skassa




[Edited by Denmark - 9/11/2003 4:10:02 PM]