dude Posted April 25, 2003 Share Posted April 25, 2003 Just got back from Leons and No2 turbo seems to be coming on real late 5-5500 rpm im gonna give the motor a compression check and check the vsv's and pressure tank , any tips guys John:flame Dev Quote Link to comment Share on other sites More sharing options...
Alex Posted April 27, 2003 Share Posted April 27, 2003 I would have thought this was a problem with the actuators and VSV's that run the sequential setup. But could it also be through a tiny tear in the pipe work which is letting a bit of pressure out and making it hard for the VSV's to open as desired. IanC is your man for diagnosis of Seqential setup issues - well he has a better understanding of it than I. In your PM to me you also mentioned pinking whilst at high boost on your j-spec turbo's with a UK spec fuel system which is set to RICH. If this is the case and you have set it all up correctly I would suggest that 1 or more of your injectors maybe dirty and clogged, did you get them ultrasonically cleaned before installing them? Have you run any toluene in your fuel? (Tol can clean as well as raise the octane) HTH - compression/leakdown tests are always useful.... Quote Link to comment Share on other sites More sharing options...
Guest Usmann A Posted April 27, 2003 Share Posted April 27, 2003 Dude, did you go for the hybrids? Quote Link to comment Share on other sites More sharing options...
dude Posted April 27, 2003 Author Share Posted April 27, 2003 Usmann no dude not yet , i need to get the stock set-up running right first Alex , i had the injectors cleaned but he could not flow test them , all the plugs are the same colour , compressions are all good,there is no pinking untill boost over 1.2 bar but only it seems in 3rd gear (high load), i think it is a pressure tank/vsv prob but dont know if there is a particular order to check things in , i just noticed something strange , the boost climbs to .8 bar when the 1st turbo is online but as the revs climb it falls off to 0.5 before the 2nd turbo comes online at just over 5500rpm then it hits 1.3/4 bar . John:flame Dev Quote Link to comment Share on other sites More sharing options...
dude Posted April 27, 2003 Author Share Posted April 27, 2003 Alex Forgot to ask if i phone a chemical company for toluene what can i say i want it for ????? John:flame Dev Quote Link to comment Share on other sites More sharing options...
Alex Posted April 27, 2003 Share Posted April 27, 2003 There is normally a slight drop off in boost before the second turbo comes in. But J's come in at 3,800 normally. Quote Link to comment Share on other sites More sharing options...
Thorin Posted April 27, 2003 Share Posted April 27, 2003 Originally posted by dudersvr Alex Forgot to ask if i phone a chemical company for toluene what can i say i want it for ????? John:flame Dev thinning paint. Quote Link to comment Share on other sites More sharing options...
eyefi Posted April 28, 2003 Share Posted April 28, 2003 an awful lot of paint Quote Link to comment Share on other sites More sharing options...
Ian C Posted April 28, 2003 Share Posted April 28, 2003 Originally posted by dudersvr Usmann no dude not yet , i need to get the stock set-up running right first Alex , i had the injectors cleaned but he could not flow test them , all the plugs are the same colour , compressions are all good,there is no pinking untill boost over 1.2 bar but only it seems in 3rd gear (high load), i think it is a pressure tank/vsv prob but dont know if there is a particular order to check things in , i just noticed something strange , the boost climbs to .8 bar when the 1st turbo is online but as the revs climb it falls off to 0.5 before the 2nd turbo comes online at just over 5500rpm then it hits 1.3/4 bar . John:flame Dev No symptoms I've experienced before so no quick answers from me. Are you saying that #1 reaches 0.8bar normally, but carries on through 3500-4000rpm with no change in behaviour, then just before 5500rpm boost drops off and #2 finally comes in at around 5500rpm? As if the transition point has simply moved up the rev range? Or is it that boost drops off #1 at 3500ish as normal but #2 doesn't come online until 5500 anyway? Give us a quick mods list. And it came away from Leon's like this? Didn't he say anything about the strange behaviour? Or was it just there for a service or something? -Ian Quote Link to comment Share on other sites More sharing options...
Dragonball Posted April 28, 2003 Share Posted April 28, 2003 Originally posted by Ian C No symptoms I've experienced before so no quick answers from me. Are you saying that #1 reaches 0.8bar normally, but carries on through 3500-4000rpm with no change in behaviour, then just before 5500rpm boost drops off and #2 finally comes in at around 5500rpm? As if the transition point has simply moved up the rev range? Or is it that boost drops off #1 at 3500ish as normal but #2 doesn't come online until 5500 anyway? Give us a quick mods list. And it came away from Leon's like this? Didn't he say anything about the strange behaviour? Or was it just there for a service or something? -Ian He'll be along later - probably polishing up his medallion and combing the Supra chest wig! I tried Johns car out at the weekend - nice bit of polished 'bling-bling' rocker covers now in place - Cheers m8! As follows IMHO Sluggish take-off up to 5/10 mph Normal first turbo in - seems to go to 0.8 etc Second turbo just doesn't appear until 5500 - and then boy does it come in! Mods - (probably others) Uprated Injectors / pump S-AFC (as per Leons setting) Blitz SBC-ID (set to 11 gain / 70 set) Checked the hoses - seem ok and connected correctly Just looks like there is no spool up of the 2nd at all? Someone please help the old boy! Quote Link to comment Share on other sites More sharing options...
dude Posted April 28, 2003 Author Share Posted April 28, 2003 Paul you forgot mines ecu FMIC hks induction no cats performance exhaust boost is reaching 0.8 on 1st turbo but tailing off to o.4 then 2nd comes in at 5500+ and all hell brakes loose , The car went to leons for fuel mapping which has been done , he wanted to keep the car to sort these probs but i needed to take it home and besides seeing as how i am a mechanic it seems stupid to pay someone else to do work that i can do myself , Leon has told me what to check and so far i have done the following compression .... all ok the 3 vsv's by the turbo piping,all ok , i think im gonna find a bad pressure tank or a dodgy actuator somewhere, when ive found/cured the problem its going straihgt back to leon for a bit of fine tuning . John:flame Dev Quote Link to comment Share on other sites More sharing options...
Ian C Posted April 29, 2003 Share Posted April 29, 2003 To be honest, mate, I don't know what's up. ALl my experience is based around stuff not opening at all, this sounds more like something is only partially opening... When (i.e. what rpm) does the boost tail off to 0.4? Could it be a sticking exhaust gas control valve? -Ian Quote Link to comment Share on other sites More sharing options...
Alex Posted April 29, 2003 Share Posted April 29, 2003 The solution is simple...stick on a single and then you'll never be left waiting for no.2 as no.1 will be great on its own! SP57's can be run on your fueling solution. Quote Link to comment Share on other sites More sharing options...
Mark Ayling Posted April 29, 2003 Share Posted April 29, 2003 My No. 2 was late the other day...I took some Senakot and was sorted in no time.... / gets coat Quote Link to comment Share on other sites More sharing options...
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