Performance differences between exhausts at moderate power levels
16 June 2002, 09:47 PM
#1
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On a car with about 300 BHP I reckon the Prodrive backbox is too restrictive. I never thought backboxes made a massive difference but when the rest of the breathing is sorted out I am in no doubt that the really loud ones do. What about the moderate volumes ones like a Magnex 6x4 or round? Any (hard) data on restrictiveness?
16 June 2002, 10:13 PM
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Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
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get yourself a hks... not too loud... as its not all stainless...
certainly aint restrictive... well I cant feel any restrictions when I stick my arm in it
David
certainly aint restrictive... well I cant feel any restrictions when I stick my arm in it
David
17 June 2002, 12:17 AM
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I'll second that, the HKS Hiper is lovely... definately not too loud (unlike BPM's!), sounds great, looks great (IMHO), superb fit and made a big difference to the car... just need fuel sorted now tho!
M
M
17 June 2002, 06:57 AM
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John,
Scoobysport 'quiet' version works for me, and is less restrictive than Prodrive (but more so than standard SS...obviously!).
Be aware that putting in the VF23 will make everything louder (deeper) - lots!
Richard
Scoobysport 'quiet' version works for me, and is less restrictive than Prodrive (but more so than standard SS...obviously!).
Be aware that putting in the VF23 will make everything louder (deeper) - lots!
Richard
17 June 2002, 01:18 PM
#5
If only David Vizard had owned a Scooby we would have all these questions answered.
Our only hope is to borrow a selction of exhausts and do extensive dyno time and use a flow bench (I have designs for a home made example!).
Perhaps a performance mag will do an article if you write to them nicely?
F
Our only hope is to borrow a selction of exhausts and do extensive dyno time and use a flow bench (I have designs for a home made example!).
Perhaps a performance mag will do an article if you write to them nicely?
F
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