NG horsepower upgrades

[Alan Pritchard]

Uurm, strangely enough I have just received it, thanks eric!!!
Nice design, number 5 cylinder feeds on its own to the 3-1 collector, in a
tube about half the cross section of the other downpipe tubes, like you
said, the paths are unequal, with no 1 being the longest....
Nice bit of kit.
Kinda agreeing with you that there may not be a great deal between 5-3-1 and
5-2-1 assemblies, but given the choice I definitely think it should be the
5-3-1. anyway, I have a damaged stud to remove, so thatll keep me busy for
now...

Best Regards,
Alan Pritchard

Network Administrator
Mechanical Design Engineer
Seaeye Marine Ltd.
+44 (0)1329 289000

 -----Original Message-----
From: 	Huw Powell [mailto:audi at humanspeakers.com] 
Sent:	27 August 2004 10:17
To:	Alan Pritchard
Cc:	'David.Payne at brinksinc.com'; quattro at audifans.com
Subject:	Re: NG horsepower upgrades


> Oh, Ok, maybe not as good as I thought it was, only thought there was
> a 2 part from another listers comment...

here be one:

http://www.humanspeakers.com/cgi-bin/audi_img.pl?image=4kq-em-dp.jpg

but you'll have yours soon enough, eh?

I always meant to add photos of the stock coupe setup and the NG EM/DP 
for comparison.

> Equal length headers are only good at producing max torque at a
> narrow rev range, unequal lengths produce a wider spread of
> power.....iirc

That's right, you pick the rev to optimize the scavenging, it determines
the pulse length.  So pick a high rev to maximize that hp!

>> I also like your idea of *really* opening up the intake tract...
> 
> yeah, really considering some kind of individual throttle body setup,
> just for fun ;) or a bank of standard throttle bodies on the stock
> plenum... I dunno, haven't thought that far yet.

I'd suggest a nice row of 5 Webers, but I suspect EFI will give better
control.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/