G500ONC Sierra 2wd - EFR here, 21/3/14
11-11-2018, 07:48 PM
#681
10K+ Poster!!
2.2 is my guess but could be more
Last edited by Caddyshack; 11-11-2018 at 08:05 PM.
11-11-2018, 07:50 PM
#682
10K+ Poster!!
Double post
Last edited by Caddyshack; 11-11-2018 at 07:56 PM.
11-11-2018, 08:14 PM
#683
PassionFord Post Whore!!
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turbotrev (11-11-2018)
12-11-2018, 06:46 AM
#684
Surely boost is just boost no matter what the turbo is? I may be over simplifying it and missing something but I assume that if the inlet tract at 3000 revs is seeing 1 bar of boost then every Turbo would equal the same power at 3000 revs and 1 bar boost? The other factors must be the revs it makes the power at.
12-11-2018, 11:03 AM
#685
10K+ Poster!!
Boost is not just boost independently of what turbo it is. Boost is only the measure of pressure in the inlet channel. Together with the inlet temperature this determines the amount of air going into the engine. The inlet temperature is depending on the intercooler, but also on the compressor efficiency. Besides that the back pressure on the turbine side also determines how much ‘effort’ is needed to push the exhaust gasses out of the engine, and how much power is lost by that.
13-11-2018, 09:32 AM
#686
Advanced PassionFord User
The midsize efr’s suffer badly from high backpresure so if anything they will run hotter than other turbos as their egts go through the roof.
Hence all the peak power from them is lower down
Cheers Paul
Hence all the peak power from them is lower down
Cheers Paul
13-11-2018, 11:27 AM
#687
PassionFord Post Whore!!
Dont put on a wrong size turbo and expect it to keep making power when the engine is beond its efficiency band and has to have a bigger turbo to make it work.
Mark
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turbotrev (13-11-2018)
13-11-2018, 12:48 PM
#688
Advanced PassionFord User
Not correct. Back pressure within correct limits. But you do like with any other turbo use the correct one for the job you want it to do.
Dont put on a wrong size turbo and expect it to keep making power when the engine is beond its efficiency band and has to have a bigger turbo to make it work.
Mark
At high rpm are the egts still fine on say the 7064 and 7670 at say over 2 bar of boost?
Even if flat on say a top speed run?
Also do the efrs actually run cooler than other make turbos as Toby sugggested?
Cheers Paul
13-11-2018, 05:21 PM
#689
PassionFord Post Whore!!
13-11-2018, 07:06 PM
#690
Advanced PassionFord User
Not gonna lie, I don’t understand that Mark
Cheers Paul
Cheers Paul
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MONSTER (16-12-2018)
13-11-2018, 07:26 PM
#692
Advanced PassionFord User
Last edited by turbotrev; 13-11-2018 at 08:28 PM.
13-11-2018, 07:50 PM
#693
PassionFord Post Whore!!
I haven’t noticed and diff in inlet air temp but I haven’t done a back to back test of compressor outlet temp.
Mark
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turbotrev (14-11-2018)
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