lookforjoe Posted October 4, 2011 Author Report Share Posted October 4, 2011 Did a quick 3rd pull this afternoon. Running nicely, in 3rd at least! 60-100 is now 5sec; still running 17psi. I'm concerned about the clutch slippage yesterday, I have romped on it like that today. I need to figure out what to do about the pressure plate, so I can do the flywheel & clutch at the same time (hopefully not 'cos I have to, but when I have the time) Quote Link to comment Share on other sites More sharing options...
BlackT5 Posted October 4, 2011 Report Share Posted October 4, 2011 Are you sure it's slipping at the top of first? you would think you'd feel it more in 4th on a hard pull. Quote Link to comment Share on other sites More sharing options...
Volvo5.0 Posted October 4, 2011 Report Share Posted October 4, 2011 Seems to be running great right now! Any thoughts of getting it back on a dyno? What do you think about the accuracy of the IAT's? Just seems really low, especially at higher rpm's. Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted October 5, 2011 Author Report Share Posted October 5, 2011 Are you sure it's slipping at the top of first? you would think you'd feel it more in 4th on a hard pull. It slipped in 2nd, when I shifted up from 1st @ around 8K on an incline and was holding WOT until I realized what was happening. Seems to be running great right now! Any thoughts of getting it back on a dyno? What do you think about the accuracy of the IAT's? Just seems really low, especially at higher rpm's. IAT's are not scaled properly - they were too high in the previous log, so I revised the scale, and now it's reporting too low a value. The % differential is pretty accurate though - usually drops 15-20º over a good hard pull. No dyno until next spring. I have nowhere local to do (Mustang Dyno) AWD that doesn't cost a fortune & has shitty cooling fans Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted October 5, 2011 Author Report Share Posted October 5, 2011 Did a 1-2 pull this afternoon, steep uphill grade, and I just delayed going WOT a fraction coming out of the shift - it didn't slip It did slip on me earlier today doing a similar pull/shift where I maintained WOT instantly coming out of the shift, I didn't log that one, however. It looks like the reason for the slip is that on a 1-2 shift, I'm coming right into peak torque range (was 4,400rpm on last 2 year's dyno's @ Carlisle). With higher gears, it seems I'm coming out of the shift at above peak torque rpm range. This 2-3 pull had no slippage - also steep uphill incline also noting the rpm/speed pretty much matches tested, but NOT in 1st....(?) But, doesn't jive with Johann's calculations for 8090rpm range... Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted October 5, 2011 Author Report Share Posted October 5, 2011 Just rolled over 151515 miles - tried to capture it, but clip ended just before the digit flipped Quote Link to comment Share on other sites More sharing options...
550 Posted October 6, 2011 Report Share Posted October 6, 2011 Just rolled over 151515 miles - tried to capture it, but clip ended just before the digit flipped nice! I clipped mine at 200K... took like 80 pictures incase the first 79 didn't turn out haha. Quote Link to comment Share on other sites More sharing options...
BlackT5 Posted October 6, 2011 Report Share Posted October 6, 2011 That's funny, I was sitting at a light yesterday and looked down to see 161616 kms. So your last timing sheet.. it shows values to 7400rpm. So when you hit 8k+, i'm assuming it uses the 7400 value? My car seems like it just does not want to rev much past 7k. It's either cam timing, ignition timing or the turbine is too small. Looking at your timing values, I really need to ramp mine up in the higher rpms. Quote Link to comment Share on other sites More sharing options...
550 Posted October 6, 2011 Report Share Posted October 6, 2011 Mark, not sure what valve springs you have, but over 7k you could possibly have some float issues on the valves. Not really sure to be honest, but it's something to keep in mind if you aren't running solids. Quote Link to comment Share on other sites More sharing options...
BlackT5 Posted October 6, 2011 Report Share Posted October 6, 2011 Rocko and them rev the hydro heads to 8500 but maybe. I had the valve spring seat pressure increased, but that's it. Quote Link to comment Share on other sites More sharing options...
550 Posted October 6, 2011 Report Share Posted October 6, 2011 Rocko and them rev the hydro heads to 8500 but maybe. I had the valve spring seat pressure increased, but that's it. Stock heads? I figure it's possible to do it, I have never heard of float issues on these heads honestly, but haven't seen many people running high rev limits either. Quote Link to comment Share on other sites More sharing options...
Platinum 850 Posted October 6, 2011 Report Share Posted October 6, 2011 Stock heads? I figure it's possible to do it, I have never heard of float issues on these heads honestly, but haven't seen many people running high rev limits either. I have my current red-line set at 7200rpm. This is on a stock motor, with the same turbine that Hussein is using. I have maybe hit the limiter once with this current setup. Usually when I get on it, I am shifting between 6900rpm and 7100rpm. Again stock motor and head, and I'm not getting any float... So I would hope that with a built engine/ head, you could rev to that if not even higher, again this would only serve a purpose if you actually have the need to rev that high. Quote Link to comment Share on other sites More sharing options...
550 Posted October 6, 2011 Report Share Posted October 6, 2011 I have my current red-line set at 7200rpm. This is on a stock motor, with the same turbine that Hussein is using. I have maybe hit the limiter once with this current setup. Usually when I get on it, I am shifting between 6900rpm and 7100rpm. Again stock motor and head, and I'm not getting any float... So I would hope that with a built engine/ head, you could rev to that if not even higher, again this would only serve a purpose if you actually have the need to rev that high. Just because someone built the engine, doesn't mean they paid much attention to the head :-/ I was also running 7200 on my 2.4l hydro engine with no issues. But sometimes everyones experience is a little different. Quote Link to comment Share on other sites More sharing options...
JCviggen Posted October 6, 2011 Report Share Posted October 6, 2011 So your last timing sheet.. it shows values to 7400rpm. So when you hit 8k+, i'm assuming it uses the 7400 value? Yes that's what it does. You should always make your rpm points match more or less what you're going to rev to. You can do 200 or 300rpm more than the last timing rpm point but after that power is going to nosedive pretty quickly. Quote Link to comment Share on other sites More sharing options...
dublin14 Posted October 6, 2011 Report Share Posted October 6, 2011 That's funny, I was sitting at a light yesterday and looked down to see 161616 kms. So your last timing sheet.. it shows values to 7400rpm. So when you hit 8k+, i'm assuming it uses the 7400 value? My car seems like it just does not want to rev much past 7k. It's either cam timing, ignition timing or the turbine is too small. Looking at your timing values, I really need to ramp mine up in the higher rpms. Your car has loads in reserve with that turbo! Yes that's what it does. You should always make your rpm points match more or less what you're going to rev to. You can do 200 or 300rpm more than the last timing rpm point but after that power is going to nosedive pretty quickly. Whats the story with your 850? Still have it? Quote Link to comment Share on other sites More sharing options...
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