80tq: Blown Engine

[JShadzi at aol.com]

Hey Jim, I wasn't monitoring EGT's at the moment the engine went, but in general I was at about 1400-1500F going into the turbo, I was running about 12:1 fuel, and about 14d max advance under full boost.  Its hard to say, I'd estimate the exh. valves I had in there had close to 200k miles on them, and with all the tuning and pushing over the years, I'm not surprised that they failed, this is a very high output motor, these things are bound to happen every now and again.  I'll report back when I know more.

Javad

>
>--- Mihnea Cotet <mik at info.fundp.ac.be> wrote:
>> Sorry to hear about that Javad, what post-turbine
>> EGTs were you running 
>> lately??
>> 
>> I'd say it's very similar to what happened to my
>> friend running a K26/27/29 
>> on an RS2 EM at 480+ crank HP, his A/F ratios were
>> perfect and so was 
>> power, but his EGTs exceeded 1000 degree C after the
>> turbine and he melted 
>> a valve...
>
>
>Sorry to hear that Javad, that's one way to really
>screw up your weekend.  As far as the EGT's go, 1000 C
>after the turbine is retarded!  When I was at the dyno
>I was hitting about the same temp near redline, but 6"
>away from the valve.  I actually dropped the fuel
>mixture down into the 11's at that level to keep
>things closer to 1700 degree's F.
>
>Later,
>
>=====
>Jim Green
>'89 80q slow
>'89 90tq fast, really fast
>http://www.mswanson.com/~jgreen/car_home.html
>
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