Hello does anyone know what the inside diameter of the silicon hose that is supplied in the courtney top hat KIT? Is it 70mmm? I need to know to get my charge cooler I have modified correctly.
Regards
Steve
Courtney Sport Top Hat
Started by
coople
, Jul 31 2012 08:05 AM
8 replies to this topic
#1
coople
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Posted 31 July 2012 - 08:05 AM
#2
westie
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Posted 31 July 2012 - 03:32 PM
I will check for you when i get home around 6 ish
#3
westie
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Posted 31 July 2012 - 05:23 PM
60mm insde dia mate
#4
Rickwoo118
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Posted 31 July 2012 - 05:48 PM
To confirm, just checked mine and it is def 60 mm.
#5
coople
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Posted 31 July 2012 - 08:57 PM
Thanks very much chaps that's awesome. Now to modify the charge cooler inlet to the right size. 
#6
Nev
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Posted 02 August 2012 - 10:41 AM
If you want to free up your power > 300 BHP you really need to increase that bore (in small steps) all the way from the I/C inlet BTW, but would require the TB to be machined as well as increasing the pipework and I/C inlet/exit size.
According to my calcs, if your engine were making 300 BHP, then the air would need to travel down a 60mm pipe at around 270 KPH.... Imagine it trying to get round those 90 degree bends etc and you can see how it would strangle power.
I have 76mm I/D pipework in my car and because of the nasty bends in it, the noise the air makes on its way to the inlet plenum is like a loud banshee wail which is louder than the exhuast (in the cabin), but is indicative of an inneficient flow 
Edited by Nev, 02 August 2012 - 10:51 AM.
#7
coople
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Posted 03 August 2012 - 10:32 AM
Can you buy 76mm throttle body? One side of my charge cooler is currently 60mm and the other side is 70mm. What is the pro alloy charge cooler spec? Mine is going to hopefully fit like MR Simbas. So through the intercooler and then charge cooler.
#8
Nev
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Posted 03 August 2012 - 12:22 PM
The OEM Z20LET throttle body can be rebored from 57mm to 62mm and have a larger butterfly flap put in. After that you get into a sticky situation. Apparently Bosche do make TBs that are larger and are compatable with the OEM loom plug. I don't know of anyone who has fitted one on a Z20LET though.
I dunno what the standard PA CC inlet/outlets are any more - sorry.
Edited by Nev, 03 August 2012 - 12:23 PM.
#9
Duncan VXR
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Posted 03 August 2012 - 12:41 PM
Stock PA cc outlet is 60mm to tb - to compare the tfsi engine has 70mm pipework to the tb from cc and this size is oe
My view is that for the power levels required a massive tb is not required to make those numbers and going big can effect the tb control also which you would notice driving. Only real way to prove it is some bk to bk data and testing 
Remember under pressure bends are not as bad as diameter changes - side entry inlet manifold will be interesting in testing. In reality though space restriction dictate what you can or cant do
DG
Remember under pressure bends are not as bad as diameter changes - side entry inlet manifold will be interesting in testing. In reality though space restriction dictate what you can or cant do
DG
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