[s-cars] HCs and MPGs

[Serge Filanovsky]

Oil at about 2200 miles, car was NOT warmed up properly.**  So perhaps with
fresh oil and a properly warmed up car I could have done better. I think the
high HC and low MPG are related, though the car runs great, and if everyone
out there is getting less than 20MPG with an MTM stage 1+, I can stop
chasing my tail.

I know this has been done before, but I don't believe it was specific to any
state of tune. 

So MTM stage1+ or equivalent, what's your highway cruising MPG??


** warmed up properly = glowing EM accompanied by the fine aroma of clutch.

TIA

Serge Filanovsky

95.5 S6 Avant






> Serge,
> 
> When was the last time you changed the oil?  Was the car fully warmed up
> (hot) when you tested?
> 
> I failed badly for HC in CT in the Coupe with about 3k on the oil.  I got
> the car hot, changed the oil, took a quick rip on the highway and returned
> to pass with flying colors.  HC was les than half the original reading.
> 
> Tom
> 
> 
> Date: Mon, 22 Nov 2004 14:00:18 -0500
> From: Serge Filanovsky <s6serge at verizon.net>
> Subject: [s-cars] HCs and MPGs
> To: <s-car-list at audifans.com>
> Message-ID: <BDC7A172.12C97%s6serge at verizon.net>
> Content-Type: text/plain; charset="US-ASCII"
> 
> Gentlemen (and Pizzo),
> 
> Took the car in for the annual smog test today, HCs came back above limit.
> I, ummm, passed anyway, but I'm wondering if this is typically related to a
> mechanical component, such as O2 sensor or other.
> 
> I have NEVER been able to get 20mpg, even on straight highway trips. Lead
> Sneaker Syndrome (LSS), you say. Well, maybe so, but when I had my 95 green
> avant full RS2 (less the cam) I would get 21/22 MPG on these same highway
> trips, same LSS. I think I should get better MPG with a chipped OE K24 + RS2
> EM.
> 
> Patient is 95.5 Avant, purchased (rescued) in February, from a PO who was a
> bit sketchy. The car had 63K miles on it and always ran well, made good
> boost (18psi) even though it had TAP software. Came with RS2 EM and  stock
> turbo (possibly an RS2 or 7A cam), now has 80K miles, MTM 1+ 3bar...Makes
> 23psi of boost, very smooth, no obvious ignition gremlins.
> 
> I will be installing new Spark plugs and O2 sensor in the next few days.
> What I'm wondering is if I have a stock cam or not, as I have heard MPG
> takes a nosedive with RS2 cam. Is it possible to tell a 7A or RS2 just by
> pulling off the Valve cover?
> 
> The intake hoses are Samcos, and the BPV is the adjustable Hypergizmo from
> Strat., judging from the boost gauge, everything is working as advertised.
> Just crappy MPG and high HCs. Any thoughts/observations other than "get a
> Toyota Prius if you want better gas mileage"  are welcome.
> 
> TIA
> Serge Filanovsky
> 
> 95.5 S6 Avant 
> 
>