Thursday the new belt tensioner arrived, not new exactly but one from E-bay. I also bought a shorter belt 1775mm (6PK1775) instead of 1795mm. Before bolting it in place I had to remove the edge around where the pulley bolts on.
The old and the new. I removed some of the edge from the old one while in situ but it wasn't successful. Much easier using an angle grinder with it on the bench.
Difficult to explain but as the pulley has been changed from the larger plastic original to a 36mm diameter metal one it sits in front of the metal edge instead of covering it - that's why the edge has to be removed!
Another workaround required drilling out the bolt hole that keeps the new pulley in place because I needed a longer left hand threaded bolt. Drilled it out to M10. The problem is it's a right hand threaded bolt with a nyloc behind, but hopefully it will hold.
All pulley's in place. The belt hangs slightly off the back of the metal pulley so I'll keep an eye on it.
The small metal pulley Peter provided in the SC kit but I bought another on e-bay which is a 1.9D DW8 BELT TENSIONER IDLER PULLEY 575167 and they look exactly the same.
Once the belt was in place I left the bonnet off and pulled the pipe off the air filter so as much air as possible to get to the intake. Took it for a nice long warm up and then foot to the floor to see if the lag problem had gone....
.... Unfortunately it's still there, not all the time but enough not to be able to count on the acceleration when I need it. I can pull out to overtake and suddenly it holds back, I can hear the sound of the SC screaming but nothing happens for a few seconds. It's like it's starved of fuel. Then after a while it slowly picks up until suddenly if fly's off like the bat out of hell it should be.
When it doesn't lag it's fantastic! The acceleration is awesome.
A very frustrating situation. I've spent so much time and effort this year, the rev limiter problem prevented a good trip to Brands and Nüburgring also a dyno or two that didn't get the results I wanted. I feel I need to do the whole UK trip again as no one in Sweden has the knowledge that Peter at GKD has.
Does anyone have any ideas? I'm at a loss!
Sorry to hear it's still not right. The idea about the AFR gauge and FP gauge sounds sensible, but I think at this point I would try to find a tuner with a good reputation who is familiar with the engines and ask them to take a look. Is there anyone in Sweden who can help?
ReplyDeleteOnce I get the gauges installed at least I can set the car up with help from Peter as best we can. The problem is the rising rate fuel regulator is not well known here and was screwed up when I had the first dyno. As you know Peter then adjusted it but I beleive it could be that the adjuster on the RRFR vibrated out of position and threw things out.
ReplyDeleteHmm. Don't really know very much about FI so not sure I can suggest anything very helpful. RR FPR sounds like it could make tuning quite complicated. There must be someone expert on these matters in Sweden though?
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