Tightmopedman9 Posted August 31, 2014 Author Report Share Posted August 31, 2014 I just did the standard bleed procedure, moving from lock to lock and holding at each limit position for a few seconds. I had just mentioned that it was groaning because the process took longer than it usually does. Took a few separate tries to get all the air out. Quote Link to comment Share on other sites More sharing options...
phonsa Posted August 31, 2014 Report Share Posted August 31, 2014 Thanks need to do the same as I've got the groaning noise in the PS system as well. Quote Link to comment Share on other sites More sharing options...
boxpin Posted August 31, 2014 Report Share Posted August 31, 2014 Thanks need to do the same as I've got the groaning noise in the PS system as well. Me too. Quote Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted October 26, 2014 Author Report Share Posted October 26, 2014 So, after almost 2 months of being away from my baby I finally got back! I've only managed to put 300 miles on the engine so far so I've been keeping the boost limited to 20psi with moderately slow spoolup. I installed an Ostrich, I can't believe it took me this long to do it... I used the bottom half of the Ostrich case and threw away the top which allowed me to rivet the whole shebang to the case and still allow it to close. I plan on changing the oil at 350 miles, at which point I'll start turning up the boost. 3 Quote Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted January 13, 2015 Author Report Share Posted January 13, 2015 After dyno tuning a customer's car today I decided to throw my car on the dyno and see what sort of power I was putting down. I only did two runs and didn't do any tuning while on the dyno. This was on a Dyno-Jet. This is at 21-22 psi. My TCV is currently dead, so I had to use a crappy MBC that I made from Home Depot parts when I was in highschool. Therefore my boost isn't very stable and that's the reason for the lumpy power curve at the end. I wanted to run more boost, but I believe my FPR can't do more then 5.5 bar so my injectors are at 90%, leaving no room for more boost. 4 Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted January 13, 2015 Report Share Posted January 13, 2015 After dyno tuning a customer's car today I decided to throw my car on the dyno and see what sort of power I was putting down. I only did two runs and didn't do any tuning while on the dyno. This was on a Dyno-Jet. This is at 21-22 psi. My TCV is currently dead, so I had to use a crappy MBC that I made from Home Depot parts when I was in highschool. Therefore my boost isn't very stable and that's the reason for the lumpy power curve at the end. I wanted to run more boost, but I believe my FPR can't do more then 5.5 bar so my injectors are at 90%, leaving no room for more boost. Not too shabby at all! AFR's look nice & stable once you get over 4K. 1 Quote Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted January 13, 2015 Author Report Share Posted January 13, 2015 The point at which I believe my FPR stops increasing fuel pressure happens to occur right in the middle of an RPM window axis, at 3600RPM. In order to account for it I have to increase my WOT fueling substantially, so the fueling is very rich at 3600, then lean by 4100RPM then levels out past 4200RPM. This is using an adapted version of Piet's closed loop wideband regulation. I'll be swapping to a new chassis soon at which I'll run 6AN lines and an Aeromotive FPR. 1 Quote Link to comment Share on other sites More sharing options...
fwdGTP Posted January 13, 2015 Report Share Posted January 13, 2015 Do you happen to know what the stock fpr is able to do? I seem to be running into some lean issues at full boost, since I'm using ttusb I don't actually have a injector duty cycle, but it doesn't seem to allow me to get more fuel. I may have just ran out of injector. Nice numbers btw. Probably moves pretty good. Quote Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted January 13, 2015 Author Report Share Posted January 13, 2015 I do not know, although I didn't seem to have any fuel irregularities when using the stock FPR up to 26psi. Quote Link to comment Share on other sites More sharing options...
fwdGTP Posted January 13, 2015 Report Share Posted January 13, 2015 Alright cool, it may just be injector limited, or just a tuning issue. I'm gonna look into it more. Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted January 13, 2015 Report Share Posted January 13, 2015 Alright cool, it may just be injector limited, or just a tuning issue. I'm gonna look into it more. Did you upgrade your fuel pump? The FPR cannot maintain pressure beyond the volume delivery limitations of the pump, so once you reach the capacity limit of the pump, inj duty will climb rapidly & AFR's will lean out. Similar sized injectors on my setup were good to 450AWHP (21psi on PTE6262, DW300 in tank pump) before the pump was done & duty cycle went over 90%. You can log Inj duty with the SSI-4, BTW - use a feed tapped into any one of the inj signal ground wires to feed it. This could be discussed in your thread, if you need to elaborate Quote Link to comment Share on other sites More sharing options...
Piet Posted January 13, 2015 Report Share Posted January 13, 2015 (edited) AFR's do look nice and stable with the wideband regulation (as Hussein mentioned). I'am getting similar stable AFR results with the wideband regulation. The engine feels much much smoother with it. What did you do with the LTFT-PL? At first I turned it off. But recently I turned it on again. I did't notice any negative effects of it sofar. It slowly floats round zero. I gather it could have a supporting function for the STFT while cruising, and at acceleration it reacts to slow to be of any influence. But I have to drive with it a little longer, to soon for conclusions yet. Nice powerband b.t.w., the 20G holds pretty good into the hight revs while it isn't to laggy so it seems. Edited January 13, 2015 by Piet Quote Link to comment Share on other sites More sharing options...
mattwebb502 Posted January 13, 2015 Report Share Posted January 13, 2015 no dyno videos? Quote Link to comment Share on other sites More sharing options...
Tightmopedman9 Posted January 13, 2015 Author Report Share Posted January 13, 2015 (edited) AFR's do look nice and stable with the wideband regulation (as Hussein mentioned). I'am getting similar stable AFR results with the wideband regulation. The engine feels much much smoother with it. What did you do with the LTFT-PL? Nice powerband b.t.w., the 20G holds pretty good into the hight revs while it isn't to laggy so it seems. I've had my LTFTs turned off for quite some time due to my BOV staying open at part load. I overlaid the runs with the 15G I tuned for an idea on the powerband differences: I did take some videos, but the I had someone else operating the camera for the runs and they ended up not being in focus or having much of the car in the shot. Edited January 13, 2015 by Tightmopedman9 1 Quote Link to comment Share on other sites More sharing options...
Piet Posted January 14, 2015 Report Share Posted January 14, 2015 (edited) The comparison with the 15G clearly shows the still fast enough spool up of the 20G Nice turbo the 20G! Would be a very nice replacement of my 19T ..... Edited January 14, 2015 by Piet Quote Link to comment Share on other sites More sharing options...
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