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Re: Dyno Day success! (kinda long)



Wow!  So in another 100,000 miles I'll make 0.1hp more!  Cool! :)

Jason


At 12:02 PM 10/23/00 , you wrote:

>hehe, mine (stock everything) ran 109.7 and that is with almost 170,000 miles
>
>
>
>
>At 09:57 AM 10/23/00 -0400, you wrote:
> >Wow, good shit Ben!  117.9 HP to the wheels (I'm assuming that's SAE
> >corrected and not actual, right) is a lot of power for what you got under
> >that hood!
> >
> >My first (baseline) run with 41,000 miles on the car was corrected to 106
> >if I remember correctly. Actual was 109.6 -- I scanned the wrong graph to
> >put on my website (www.scirocco16v.org under "Press").  With the
> >coast-down, I came up with 123hp at the motor...  So basically, anything
> >over 106 is what you gained with your mods... i.e. you got 12hp more out of
> >the motor.  Which also explains why you're faster than I am. :)
> >
> >Mine made 110.0 lb-ft of torque, but again, that's actual.  Corrected was
> >108 if I remember... so despite an overly rich mixture, you're still ahead
> >of the game.
> >
> >I'd love to see that curve though.
> >
> >And remember, the benefit to mixture is bell shaped at full throttle, at
> >all revs... so basically, running lean loses power less and less until just
> >past stoich, and then overly rich falls off... albeit slower.  So if you're
> >*too* rich all over, there will be gains by leaning out the mixture.
> >
> >The other thing to consider is that the engine goes open-loop at full
> >throttle -- so it's ignoring the O2 sensor.  Correct me if I'm wrong of
> >course.  So your O2 sensor not working would have had no effect on
> >performance on the dyno.  But if your car is running way rich due to DPR
> >adjustment, it might have hurt performance.  I don't think so, personally,
> >because while your car is running rich, it's not overly rich IME -- just a
> >little teeny bit of black smoke at high revs, which is exactly what you 
> want.
> >
> >Don't change a thing with your mixture, just get that O2 sensor back on to
> >get the car running more efficiently at part throttle.  And enjoy it --
> >according to the Jason-o-Meter, you got yourself a nice 136hp motor.(*)   :)
> >
> >Jason
> >
> >*  The 136hp at the motor figure was obtained by using the same drivetrain
> >losses as my car displayed on a coast down measurement.
> >
> >
> >
> >At 01:48 AM 10/23/00 , you wrote:
> >><snip>
> >> >
> >> >I think everyone (except Ben) was pretty pleased by their performances.
> >>
> >>  Well, first of all, this was a great time!  Second, a working o2 sensor
> >>is a very good thing to have...especially when trying to dyno!!  ; )
> >>
> >>   the details...
> >>
> >>My 1.8 16v (TT exh, Euro intake, K&N air filter, and lightweight flywheel)
> >>did two base runs on the Dynojet (2nd run was best)
> >>  HP: 117.9  Torque: 109.5
> >>
> >>Here's the problem... : /
> >>
> >>  after the 2nd run Brett and I check the timing and then check the fuel
> >>mixture so that we can do a little "tuning" ... the whole point of the
> >>day!... and we notice that the o2 sensor isn't sending a good reading, so
> >>we can't set the mix.  And this means that both of my runs were done
> >>without a working o2 sensor!  Which means that my mixture was already too
> >>rich...helped me out in top end a bit, but took away some bottom end...
> >>I don't even know what the car could have done now (if the sensor was
> >>good)
> >>
> >>The source of the problem is that last month I installed a new o2 sensor
> >>(generic 3-wire) and I spliced it into the old connectors.  I was careful
> >>to make the solder connections correctly and everything...
> >>but I forgot about the hot exhaust gasses being hot enough to melt the
> >>solder!  The heating element on the sensor shorted out so I was basically
> >>running a single wire sensor...at the cat. (which doesn't get quite hot
> >>enough to make the sensor operate all the time).
> >>
> >>What have I learned?
> >>   If you are going to install a generic 3-wire o2 sensor, make sure that
> >>you solder the connections with a solder that will not remelt under the
> >>heat of the exhaust!
> >>
> >>Does anyone have another solution to this potential problem?
> >>
> >>I will just have to wonder now how the results would differ on the dyno...
> >>hmmmmm
> >>
> >>
> >>=====
> >>____________________________________
> >>Benjamin Harder
> >>86 Scirocco 16v
> >>81 Scirocco
> >>http://members.nbci.com/Scirocco16v/
> >>
> >>__________________________________________________
> >>Do You Yahoo!?
> >>Yahoo! Messenger - Talk while you surf!  It's FREE.
> >>http://im.yahoo.com/
> >>
> >>--
> >>Email LIST problems to: scirocco-l-probs@scirocco.org. To unsubscibe send
> >>"unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> >
> >
> >
> >
> >----------
> >1987 Scirocco 16v
> >1988 Mercedes 190E Sport Euro
> >
> >
> >http://www.scirocco16v.org
> >
> >
> >--
> >Email LIST problems to: scirocco-l-probs@scirocco.org. To unsubscibe send
> >"unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> >
> >
> >
>my version of reality, isnt always better
>
>(MAD)Josh
>87 16v seidl




----------
1987 Scirocco 16v
1988 Mercedes 190E Sport Euro


http://www.scirocco16v.org


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