Mat Indukts Lambos

<center><img src="http://pictureposter.audiworld.com/54525/334whpdyno.jpg"></center><p>We noted the afr on the graph was considerably higher than what the afr was on the wideband that's installed on the car. Given the EGT readings we were seeing, I'd tend to believe the afr's on the graph (being read at the tailpipe) are about .5-1 higher (leaner) than what was being read in the car (sensor is about 15-16" after turbo).

EGT's peaked at about 1020 C during the entire dyno session, running 28 psi of boost. Fuel pressure could've been increased, there was more room as it's only set at about 3.8 bar base pressure, but all was running ok IMO.

Thanks for all the compliments I got at H20i!

Mat Indukts Lambos

<img SRC="http://pictureposter.audiworld.com/54525/shoppics804_022.1.jpg">

<img SRC="http://pictureposter.audiworld.com/54525/shoppics804_035.jpg">

<img SRC="http://pictureposter.audiworld.com/54525/shoppics804_036.jpg">

<img SRC="http://pictureposter.audiworld.com/54525/shoppics804_040.jpg">

<img SRC="http://pictureposter.audiworld.com/54525/shoppics804_041.jpg">

Get up on that gator.....
<img SRC="http://pictureposter.audiworld.com/54525/vir-car-42-05.jpg">

<img SRC="http://pictureposter.audiworld.com/54525/mat_audi_vir_apr_2004l.jpg">

xr4tic

I like that it has a lot of usuable RPM range.

What's the A/R on the exhaust housing of the turbo?

Was this done on a Dynojet?

Mat Indukts Lambos

afr's were at lowest, around 10.8, but I'd say they were normally around 11.5. On that afr graph, IMO they were around .5-1.0 lower. Could be mormal too, since the exhaust had the full length of the car to burn off any remaining fuel, which would then give a leaner reading, eh?

xr4tic

the turbine scroll ratio - A/R

ex: 0.48, 0.63, etc, etc

RAD69

I am looking into turbos right now and have to decide on which exhaust housing I want - like John asked - what is your A/R on the hotside? .48? When do you see full boost?

Mat Indukts Lambos

We're not entirely sure what the a/r is, since ATP (Another Stupid Problem) failed to answer me when I asked. We've collectively guessed it's either a .48 or a .50 trim.

LlRedWgn:: RIP Matt

He'd probably want to buy it from you... :-)

auditunerb5

Nice pull... Thumbs UP! What octane you running?

Mat Indukts Lambos

Majority of that tank was 100 octane pump gas from Sunoco