maciekb2002 Posted June 13, 2013 Report Share Posted June 13, 2013 (edited) You have enough knowledge about turbo chargers , I am pretty sure that you are able to feel the difference. Also journal bearing has a different oil inlet and you would have to use other type fitting . It has balls Edited June 13, 2013 by maciekb2002 Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted June 13, 2013 Author Report Share Posted June 13, 2013 I told you that turbo noise when I was in you car 3 months ago isn't normal BTW people that is another fact about SPEC stuff . Lots of people heaving bad experience with their parts. Including me and several more people at this forum . DON'T BUY SPEC STUFF !!!! Yeah - it doesn't whistle like the other one. To be fair, the problem with the Spec clutch was the flywheel - I don't know if I would have had the trouble otherwise Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted June 13, 2013 Author Report Share Posted June 13, 2013 Sounds like a Journal bearing to me. You have enough knowledge about turbo chargers , I am pretty sure that you are able to feel the difference. Also journal bearing has a different oil inlet and you would have to use other type fitting . It has balls Yeah - the cartridge is identical to my old one, and it didn't feel like a JB turbo. I called Precision anyway - since I couldn't find any documentation online of the CHRA differences. All BB CHRA's are different than JB. So, chances are good that the first one was on the very loose side of the bearing spec, and this one is on the tighter tolerance end, which is fine with me. Quote Link to comment Share on other sites More sharing options...
blkaplan Posted June 14, 2013 Report Share Posted June 14, 2013 To be fair, the problem with the Spec clutch was the flywheel - I don't know if I would have had the trouble otherwise Yep, that clutch didn't really stand a chance at working with that setup even if it were the best clutch in the world. Quote Link to comment Share on other sites More sharing options...
BlackT5 Posted June 18, 2013 Report Share Posted June 18, 2013 Update? Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted June 18, 2013 Author Report Share Posted June 18, 2013 Just over the run in peroid now. Had to replace the alternator, and now I need to replace the PS pump (again, bought a non-ZF new unit a year ago), and fix the AC before we head up to Quebec & Montreal in about a week. With the battery disconnected, all my adaptives are gone - I did a quick 4th pull and AFR's were definitely too lean - so I'm going to have to baby it a little & figure out what if anything I need to re-map to get it back to where it was. I had leaned out the mid & upper ranges that get used at part throttle, where boost onset is very strong, but this is WOT AFR's that is of concern. No slippage, no wheel hop (yet) - I'll do a hard 3rd pull on the way home if the traffic allows, just to check the hop situation. I put the Motegi's back on - didn't like the arch rub with the Enkei's ET38 offset & 50 series tires. I did put spacers behind each C/arm bushing to minimize deflection -I'll see if that's doing the trick. Quote Link to comment Share on other sites More sharing options...
blkaplan Posted June 18, 2013 Report Share Posted June 18, 2013 the clutch slip could of been inducing the wheel hop. Hopefully you killed 2 birds with 1 stone. 1 Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted June 18, 2013 Author Report Share Posted June 18, 2013 the clutch slip could of been inducing the wheel hop. Hopefully you killed 2 birds with 1 stone. That would be nice. Traffic was too heavy to do the aggressive 3rd-4th pull coming off one ramp onto the highway that always induced hop/slip before. I did a couple of straight line pulls to check AFR's - I have to increase fueling - timing also logged lower than earlier in the year - ambient temps are significantly higher now though. Quote Link to comment Share on other sites More sharing options...
B Mac Posted June 18, 2013 Report Share Posted June 18, 2013 I was going to comment that maybe the wheel hop you felt was really clutch chatter under load? Hopefully the AP serves you well. Quote Link to comment Share on other sites More sharing options...
blkaplan Posted June 18, 2013 Report Share Posted June 18, 2013 If you can't get wheel hop in 1st or 2nd gear, id say theres a 99% chance that what you were feeling was your clutch or that the clutch slip was inducing wheel hop. Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted June 19, 2013 Author Report Share Posted June 19, 2013 3rd/4th earlier today. Higher ambient temps definitely suck. 3rd after revising WOT 4th - need to do some more work on it. If you can't get wheel hop in 1st or 2nd gear, id say theres a 99% chance that what you were feeling was your clutch or that the clutch slip was inducing wheel hop. Never had hop in 1st or 2nd - only 3rd, 4th 5th. Tomorrow I'll get on it hard, hopefully. Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted June 24, 2013 Author Report Share Posted June 24, 2013 Logs from Friday and Ithaca drive 3rd 4th 5th - coolant temp rises from 194ºf to 203ºf over length of pull This one was on the way up, I raised the boost to 1.4kpa - horrible AFR spike freaked me out - I was watching the wideband & backed off quickly on the way back, after some map revisions - 4th steep uphill (EGT probe is dead) 7ºf increase in coolant temp over length of pull 4th no increase in coolant temp on this one had to raise the WOT sliders, and enrich the 100% load cells. Still need to do more - this was at only 18psi - when I tried 20/21psi earlier, it was very lean (as in the graph shown with the spike). The higher ambient temps must be a factor, I've not changed any hardware (except direct replacements) since the dyno pulls in April. EDIT: Now I'm wondering if I'm back to a fuel delivery issue again - this is similar to when the original pump was at it's max - I couldn't tune out the lean AFR's up top. I'll have to make some more drastic changes & see if I can drop the AFR's down to 12. The timing values in that hard uphill seem to be close to requested, so I don't think timing pull is an issue there. Quote Link to comment Share on other sites More sharing options...
blkaplan Posted June 24, 2013 Report Share Posted June 24, 2013 so is the clutch slip / wheel hop gone? Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted June 24, 2013 Author Report Share Posted June 24, 2013 so is the clutch slip / wheel hop gone? Yes! I did put interference fit blocks of aluminum behind all 4 control arm bushings, and silicone pads behind the arm casting - so that the bushings are effectively pre-compressed, and limited in their axial flexing. Don't know how much that will impact longevity of the bushings. Still no reply from Jerd.se on their poly bushings for C70/AWD control arms. Quote Link to comment Share on other sites More sharing options...
NEU Posted June 24, 2013 Report Share Posted June 24, 2013 Still no reply from Jerd.se on their poly bushings for C70/AWD control arms. That's unfortunate as they seem to be our only hope. Quote Link to comment Share on other sites More sharing options...
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