Running a 202 staight extractors.
#1 _WYLDLC 6_
Posted 24 March 2006 - 02:57 PM
Cheers Chris.
#2 _draglc_
Posted 24 March 2006 - 04:21 PM
A1
#3 _Loki_
Posted 24 March 2006 - 06:39 PM
Backpressure is unwanted when WOT.
When you're just cruising and idling etc. you want backpressure to protect engine.
Someone else able to add insight into the truth of this and why?
#4
Posted 24 March 2006 - 08:09 PM
Cheers
Loui
#5 _1QUICK LJ_
Posted 24 March 2006 - 09:14 PM
#6
Posted 25 March 2006 - 08:15 AM
I'd probably suggest using a short side pipe similar to the bathurst race cars, that will get you away from these problems as well as having the exhaust exit the side of the car which would be better for a variety of reasons.
What's the car going to be used for?
#7
Posted 25 March 2006 - 09:20 AM
Cheers
Les
#8
Posted 25 March 2006 - 09:23 AM
#9
Posted 25 March 2006 - 09:27 AM
This whole thing about "back pressure" is straight out wrong..pressure is just resistance to flow...if the system is big enough it will not build up pressure..but it won't necessarily run properly...an exhaust system does more than just provide a means for the removal of exhaust gas.
#10
Posted 25 March 2006 - 10:22 AM
Les
#11
Posted 26 March 2006 - 06:50 AM
#12 _73LJWhiteSL_
Posted 26 March 2006 - 12:12 PM
I used to run a 2 1/4" exhaust and extractors off my stock 173. Well it would rev out nicely in the higher rev range (with a stocky we are talking 3900RPM ) but it was gutless of the line and used to bog pretty easy.
I had a 2" exhaust installed with the same extractors, and the difference was very noticable. Firstly the bottom end. I gain a heap of torque down low, so the car didn't bog anymore taking off, however it got a fair bit more asthmaticy in the higher rev ranges.
This sort of stuff probably doesn't apply to race cars, but for street cars the importance of getting the right sized exhaust probably makes a heap of differents in driverablity or lack of.
Steve
#13 _WYLDLC 6_
Posted 27 March 2006 - 03:18 PM
Cheers Chris.
#14
Posted 27 March 2006 - 08:33 PM
If the system is too big it won't allow correct scavenging...that is what aids driveability.
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