so I dynoed my car today on maha....
#61
and why you are running stock gt2 ?<V</V<?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:shape style="WIDTH: 12pt; HEIGHT: 15.6pt; VISIBILITY: visible; mso-wrap-style: square" id=Picture_x0020_1 alt="http://images-2.ibsrv.net/ibsrv/res/src:www.6speedonline.com/get/forums/images/smilies/confused.gif" o:spid="_x0000_i1025" type="#_x0000_t75"><v:imagedata src="file:///C:\Users\Jean\AppData\Local\Temp\msohtmlclip1\01\c lip_image001.gif" o:title="confused"></v:imagedata></v:shape>
<O</O
Good question I guess because I already have this one that is a bit modified. 100-200kph in 5.2s. (Good opportunity to show it off )
Also the roads here are definitely not appropriate for a modified Porsche.<O</O
Last edited by Jean; 02-26-2011 at 11:52 AM.
#62
I think this new dyno graph also confirms that max. torque at 1.4 bar on these engines is limited < 650lbs.ft. While max. HP seems to be limited by the size of the turbos on this latest run.
Last edited by Jean; 02-26-2011 at 11:28 AM.
#63
how about amount of air? my present turbo produce more kilo of air than big vtg's on same boost level.
#65
The size of the turbo will not make a difference in the peak torque being delivered at the same boost level, it is driven by the engine capacity to absorb air, since both turbos are not flowing near their maximum capacity at those RPM levels. The torque peak will move to the right of the scale with the bigger turbo if it takes longer to spool to 1.4 bar. This is the same rationale as to why restrictors on turbos for race cars only limit maximum HP and max. torque is not impacted.
As emadelta rightly said, provided none of them chokes, also, the larger turbo "might" give slightly more torque in case the smaller turbo is driving higher intake air temperatures, but this is unlikely unless it is a very mismatched map with the engine needs.
Last edited by Jean; 02-26-2011 at 04:43 PM.
#66
Jean the value i got for "Pressure Ahead of Throttle plate" when the car is stationary is 1000 , and maximum was 2550 accelerating in 3rd does this mean the car is boosting 1.55 bar ??
#67
btw how to post here data log? it's long...
#70
Can you please post your highest mass airflow reading with the corresponding RPM and load reading?
Karol, if you hide a number of these rows (like 10 at a time for example) it should be more readable.?
#71
Yes this is the way to do it. Theoretically it should be 980 I believe but if your idle pressure is 1000 that will be right.
Can you please post your highest mass airflow reading with the corresponding RPM and load reading?
Karol, if you hide a number of these rows (like 10 at a time for example) it should be more readable.?
Can you please post your highest mass airflow reading with the corresponding RPM and load reading?
Karol, if you hide a number of these rows (like 10 at a time for example) it should be more readable.?
I sent logs to you....
#75
you can't call this bit