hi! i just fited my EFI rst engine in a escort mk5 the engine has everything new
and runs with MS2 i have in the inlet manifold on left side vacum hose to ecu and to dump valve and on right side vacum hose to pressure gauge, pressure with trottle lifted is -0,5 and when i step on trottle it only gives me 0,1 - 0,3
it doesnt give me more pressure and the dumpvalve dosnt give me the woosh! i tried the same without dumpvale and i still dont have pressure i checked for air leaks but didnt find nothing my westgeat is a forge and is closed i dont have any boost control so it should be giving it all so i need some HELP!!!!!!

thanks!!!!

 

shorten the rod of the actuator for more boost, simples but do it with 1/2 a turn at a time, or get a boostcontroller, mechanic or electric.. piece of advise dont just turn it up, get it setup for the boost.

 

the rod of the actuator is shorten all the way that should give me all the boost that the tubo gives, is -0,5 bar good vacume pressure? and with the car still and just opening thottle should the dump valve sound?

thanks!!

 

cant really say what boost you get when winding the standard actuator to max as i have fitted a garret -31. im using little less than half a hole preload and im getting about 0.6 bar with the amal valve disconnected.
Maybe your spring inside the actuator is weak and needs replacement, how old is it?
dont know if you can put in a new spring or that its a whole replacement.
my vaccuum is -0.5 bar on idle and -0.7 on overrun, but thats got nothing to do with your turbo , its the underpressure your engine creates.
About your dumpvalve maybe its not connected right, a guy on here had the same problem with it not blowing off. had something to do with a t-piece he used that was narrowed down inside causing it not to blow off.
again as a comparison mine blows off from 0 - 0.1 bar boost already.

Edit: only if you rev it too about 5k you will hear the dump valve if you are not driving, its pretty pointless just revving to hear it blow off..
Its not blowing off because the engine isnt loaded enough the make the turbo create boost.

 

okey thanks alot!!!! y fitted a FORGE actuator so it is new i dont think thats the problem
i got good vacume and i havent rev it more than 4k without driving the car so i thinks thats it

thanks again!!!!!

 

Car needs to be under load to provide a reaosnable amount of boost

 

Id throw the dump valve in the bin if your not running big boost!!

 

you won't see any boost just revving it on the spot you need to go driving and then see what boost your making

 

back again with one more question.... i got a t3/t4 turbo and boost comes in very late at 6000rpm i got 19psi but isnt the boost suposed to come in much before? i have megasquirt managment do you thing bad ing mapping could be the problem?

 

Get it mapped by a pro mate, the late boost sounds bad!!

 

i´m living in spain right now and no one maps megasquirts here.... so could maping be the only problem?

 

also heard not to plum the dump on the ecu pipe

 

these is my turbo SPECS:

. 50 A/R COMPRESSOR

.63 A/R TURBINE

.57 TRIM

am i supossed to have so much lag with that? full boost at 6000rpm i dont think its normal.....

 

obviously isn't normal,first thing I would do is remove the dump valve,your not ment to pipe it off the vaccum hose that goes to the ecu,not sure on my turbo but its a stage 2 t3 and mine is on full boost around 3k rpm

 

dump valve is off mate...

 

Sounds like the mapping isnt helping if its not been mapped, the dump valve needs blanking off to eliminate that issue.

6000 rrpm means something is way out, even if it was a t04b u shoulod be on full boost between 4000-4500 id of thought so 6000 on a t34 is way out

 

dump valve is blank out. could it be a problem of air leak?

 

whats your idle like?was the ms2 new?are you on a base map?untill you can get some one to have a look at your map your really clutching straws,once you can eliminate the management side then move on but really need someone to look at it not sure if there is any one close to you off this site,good luck

 

i have good idle. ms2 is new. i have done o ing map using det cans and ve map using megaviewer it drives smooth but the only problem is that boost comes in very late.....

 

might be best if you call some one like jano seems very helpfull on the phone and sure he must of come across this in his time

 

TBH, bad mapping won't cause late boost... if you go lean, and have lean misfires etc then yes, timing being too retarded may also effect spool up time... but not by 2-3000 rpm lol An engine making no power off boost due to very retarded timing will obviously be making less exhaust gas which would cause a later spool, imo we are talking about a 500rpm difference in spool up rpm.

You problem is you have a donkey for a turbo. Chinese T3/T4 really is too big (and shit) for a 1600..........


Think about the worst ever setup MFI RS turbo..... it still makes boost before detonating to fuck and blowing up, a bad map will cause serious engine damage rather than stop a car from making boost.

Do you have a wide band lambda? and det cans?

Rob,

 

The first thing he will say is "fit cossy management" lol... but yes im sure he will have come across this issue before. I would hope he would say "fit a different turbo".

BTW for the OP.

I would recommend a T3, stage 2 or 3 depending upon power target (.48 for the stage 2 and .55 for the stage 3, .55 is a nice size if you can find it).

Rob,

 

i have a stage 2 t3 and its punchy as hell. id suggest the turbo you have is pony or the timing is out ie not enough advance.

 

thanks Rob! its the first time that i rebuild a rst and didnt know those t3/t4 were no good i,ll be fitting the standar t3 this afternoon see what i get and i´ll be looking for a t3 stage 2
thanks for the help

and yes Rob i have wide band lambda and Det cans

 

alright mate, i was having similar probs, i changed my actuator to a -31, and was a bit better but still not right, but changed the internal waist gate and was sweet, we think the internal waist gate was letting the pressure thru so wasnt holding boost, also try disconnecting ur ecu for half hour,

cant say that is ur prob but thats what was wrong with mine,

 

anybody knows where i can finde a stage 2 ?

 

know sum1 selling a stage 2 T34 but wants Ł350 for it,

 

Dude, i never say that unless there is a reason for it... Dont make out that i try and push people to change management systems, as anyone who has had work done by me will tell you thats not how i operate. When have you spoken to me and when have i said that to you?

To set boost levels and characteristics is very easy.

Firstly remove all jets from amal valve and get the boost to hold 12psi with a -31 actuator.

Then you will need a 2mm jet in the Compressor side of the amal valve.
Also a 3mm jet in the Return side.

This will give aprox 18psi on most T3 turbo's like std erstt3, 2wd, 4x4 or anything inbetween.

If its too much boost you could take half a turn off the wastegate arm. Or if not enough then wind in half a turn.

Regards
Jano

 

Seriously mate, chill out and laugh a bit. I've never slated you/your products or your services. That was very obviously tonge in cheek.

 

hi! thanks for the reply my problem is that i had a t3/t4 and boost starts to come in on 4500 rpm its very laggy i am going to fit the standard t3 that y have, i am running Ms2 Managment is there any especific thing y have to touch on megasquirt to get it punchy?

Thanks!!!

PD: i dont have a amal valve fitted.

 

lol

 

is it piped direct from the actuator or do you have a bleed valve

 

direct but even with the disconected i have the same problem the actuator is a forge dont think that will be the problem

 

Not really,

The only settings that will effect spool time are AFR and ignition timing.

The more power you make off boost, the more exhaust gas you generate and the faster you will build boost, running very rich will also adversely effect power etc.

Remember that its very easy to get det as your turbo comes on boost, this transitional area where load is built at a high rate should be tuned cautiously imo.

But to be totally honest you want to be sorting advance out on a rolling road... is there one locally that you can hire for a few hours? and use your self...

 

i dont know but im going to look for one so i can do it there.
thanks!!