Golf II GTD with 1.9 AAZ engine --- EVO II - page 17 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• #240 by 410 on 10 Aug, 2013 21:38
• Do you have a boost leak maybe?
• #241 by Alleslowbuged on 11 Aug, 2013 17:42
• Hi,
  
  just short notice, because it is very late in Germany and i just write it all down (4x A4 paper) in german, the day was horrible, the car break down serveral times (no overheating issue) and the best time was a 9,7s (without intercooler) after three 10,5s - 10,7s runs.
  
  The only good think is, that i could drive home without help and the car maintan it's" zero total break down" state. I think that the problem is caused by surge, but could also be due to piping forces from the intercooler pipes, i do not know. Everthing else later, here just two pictures:
  
  How it look this morning (without the hole) and this evening (with the hole, which was no serious issue)
  
  
  This how it (nearly) looks, during my best run (with WAES)
  
  
  
  
  and how the compressor housing is orientated now:
  
  
  
  
  and what is look this morning (i did not rotate it):
  
  
  
  
  Best Regards
  Alleslowbuged
  
• #242 by carrizog60 on 12 Aug, 2013 17:05
• you didnt rotate it?
  loose bolts then?
• #243 by Alleslowbuged on 12 Aug, 2013 17:18
• Hi,
  
  no i did not rotate it. The compressor housing is fixed with a retaining ring, but it is so stiff, that it is not possible to rotate it by hand, when the retaining ring is not loose.
  
  Best Regards
• #244 by CrazyAndy on 12 Aug, 2013 21:20
• Perhaps your seal around the compressor housing is leaking, forcing the housing's retaining ring to raise out of it's slot slightly, allowing the compressor housing to rotate.  I think maybe your lag concern is caused between that and the larger intercooler, although more of the latter.  Remember, the larger the intercooler, the more volume of air is needed to be compressed in it, hindering the building of boost.  Have you considered air-to-water intercooling?
• #245 by theman53 on 12 Aug, 2013 21:25
• If your compressor is rotating that could be all your lag issues. Lord Verminaard on here had the same issue and as soon as he got it tight no more lag issues.
• #246 by Alleslowbuged on 13 Aug, 2013 16:41
• Hi,
  
  yeah after thinking a bit more about it, i also think that the intercooling pipes causes my problem, by creating too high forces at the compressor housing. At 1,5 barg these stupid axial compensators produce approximate 290 N (~29 kg) thrust and i know think that this causes either a slighly bend of the housing, which prevent the shaft from proper spooling or causes a leak, whichs both end up with non optimal performance. This would also explain, why the car has had normal acceleration during no and low boost (up to app. 0,5 bar) and then stops to spool further for app. 2000-3000 rpm, before somewere above 5000 rpm it starts to pull again, when the turbine has realy high power.
  
  We will see in the next weeks, no i have to fixe my cluth issues as first step and then i can look for power production again.
  
  Best Regards
  Alleslowbuged
  
  P.S.
  
  i just see, that i did not have mentioned that first my clutch bowden cable fails and now the internal linkage to open the clutch is bend, so that i can not open the clutch anymore
• #247 by Rising on 17 Aug, 2013 14:07
• Quote from: Alleslowbuged on 10 Aug, 2013 17:05

  Hi,
  
  you are right, 16,x s and also high 15,x s are easy, but to get into the 14,x s took me 3 Years. Tomorrow is a 1/8 mile race were i will start also, but unfortunatelly my three days of full work in my garage did not look like pay of anyting.
  
  

  
  Oh sure you say that but then I see 81 vw's signature that says "81 vw caddy converted from 1.7 gasser to 1.6 NA. Diesel W/ FF 5 speed.
  1.6 TD intake and exhaust w/k14 turbo,intercooled, 2.5" straight pipe. NA. pump with govenor Mod and a 50 shot of nitrous!!!
  
  Best 1/4 mile pass= 16.8 @ 85 mph"
  
  I'm not sure i'd classify nitrous and the gov mod as EASY and he's barely out of the 17's!
  
  Do you have a list somewhere of all your mods so that one might get some kind of idea how far down the rabbit hole one has to go to break into such fantastic times?
• #248 by RabbitJockey on 18 Aug, 2013 11:15
• Maybe he needs a bigger turbo or to crank the fueling up?  Mine did low 16s with stock k24 25psi, increased fueling, stock cast dp into a 2" dp in a techtonics 2.25" exhaust.  And it had a cone filter instead of an air box.  In a mk1 jetta coupe with basically no options, no ac or any of that.  Had no intercooler or anything
• #249 by Rising on 19 Aug, 2013 13:37
• I wonder what the weight difference between a caddy and a jetta coupe is. That could account for a couple tenths. I'm hoping my stripped out rabbit L should be pretty light compared to like the golf 2 this thread is about. Could account for a tenth or two. I bet tire size and type effects light fwd diesel cars a lot as well.
  
  Alleslowbuged: What other factors should one consider when going for e/t? Have you determined how much grip is effective etc. Thanks!
  
  Sorry to thread jack! Can't wait to see what this thing runs with a proper clutch!
  
  Sent from my ADR6400L using Tapatalk 2
• #250 by Alleslowbuged on 08 Feb, 2014 17:32
• Hi,
  
  long time ago since my last post.
  
  I get the clutch issue fixed but did not found a solution for the strange power behaviour. I change the support point for the clutch cable and use an original self adjusting VW clutch cable, which works until now. But in summarize the sinter metall clutch makes the car worse and not better. With the clutch it was not longer good to use as daily driver and than also one or two glow plugs stoped working, so the car starts very very bad. With all the issues (power behavior, clutch, start issue), there was a point in Oktober last year, where i not like the car very much, bough a very cheap 1992 BMW 525 TDS as new daily driver and parked the car in my garage (unregistered).
  
  Before that i have build a better intercoller pipe setup:
  
  
  
  
  Before i take the number plates off a make a last quick drive through my favorite roads and have to commit, that even with that problems that little car droves just fine (the strange power behavior only occurs during 1/4 mile runs, not during normal quick driving) and has had enough power to make me smile.
  
  Since oktober the car has sitting in my garage and i did not know what to do with it, i though i will sell it, not sell it, sell it, not seel it (i think most of you will know these situations). And than short before christmas i build a performance pump for a VW caddy mk2 with the lasted eddition of the aaz engine (with electronical advange timing) and start to realy miss my golf.
  
  
  
  The caddy get the perfromance camshaft here from the board, the stock lift plate (3,05 mm) and an Ø11mm plunger. The guy also add an HKS EVC4 boost controller, and swapp the gearbox to an long geared 02A with a Ø228er cluth (the stock cluth was hopeless) and a lighweight flywheel.
  
  
  
  
  
  The pump is absolute at the optimum point from the lift plate - plunger setup and i also think that that electronical controlled pump timing could be an improvement against the hydraulic timing control.
  
  But back to my golf, after starting to think again about the golf i decided to get a new head done, because the other one still has that crack from porting. I will also swap the turbo again, the Switzer S2B will go in my E28 and the golf will get the S2A again, which was installed during that 190 hp dyno run. But i will swap that turbine housing to a bigger twincroll one with T3 flange instead T25 flange and i will keep the QSV, so i hope to get very quick response from the S2A combined with the ability of high bost levels with relative small backpressure.
  
  The new head is allready ready cleaned, flattended, ported and poilsh. Still to do is, to pull the old head, get the valves out and to regrind the valve seats of the new head in accordance to the old valves in regard of the needed gap between the valve head and the piston.
  
  Here is new head during the disassemble:
  
  
  
  
  and this is how it looks now:
  
  
  Best Regards
  Alleslowbuged
  
       
  
     
• #251 by CrazyAndy on 10 Feb, 2014 18:37
• Glad to her you are renewing your interest in the golf project.  Hopefully your new choice of head and turbocharger will eliminate or at least reduce your boost drop-off concern.
• #252 by Alleslowbuged on 15 Mar, 2015 16:31
• Hi,
  
  first remove the dust.........
  
  I have some goof news, from today:
  
  
  
  I am a VIDEO, click me
  
  
  Always nice to hear, how dirty a good old diesel sounds without an exhaust system.
  
  I still search for a supplier you machine my turbo adapter.
  
  Best Regards
  Alleslowbuged
  
  
  Gruß Alleslowbuged
• #253 by theman53 on 16 Mar, 2015 18:51
• what turbo adapter are you looking for?
• #254 by golftd412000 on 22 Mar, 2015 06:38
• nice update