Breaking Wind

[revolutionary]

The EGTs were through the roof and one of the primaries softened up and pushed out of the collector.

When that happened it was shooting exhaust forward and about melted the fuel lines

We borrowed a TIG welder from one of the other racers and did some field repair


Got it fixed and made a 234mph pass

[revolutionary]

Annnnd on the next pass the same thing happened to the other side....

We fixed it again and ran 237.

The following morning we put some boost in the car and ended up ventilating the oil pan.

[revolutionary]

Still lots of fun overall

[manta22]

It's a good thing that it did not burn through that fuel line!

Regards, Neil  Tucson, AZ

[jl222]

  DANG.. keep at it, you'll get it and go fast.

                 JL222

[Rex Schimmer]

I know that your headers are stainless steel, which alloy? 321 is what it should be. Radiant heat, powerful stuff, it is driven by differential temperature and the distance between the hot part and any other parts, as I remember if you double the distance you will reduce the radiant heat transfer by a factor of 8, so you need lots of good reflective shielding and ceramic based insulation and lots of distance between parts, like fuel lines and the heat source. Good air flow over the affected area helps, as it cools the affected parts by convection, it has no effect on the radiant heat transfer.

Sorry to hear you windowed the engine.

Rex

[javajoe79]

I know that your headers are stainless steel, which alloy? 321 is what it should be. Radiant heat, powerful stuff, it is driven by differential temperature and the distance between the hot part and any other parts, as I remember if you double the distance you will reduce the radiant heat transfer by a factor of 8, so you need lots of good reflective shielding and ceramic based insulation and lots of distance between parts, like fuel lines and the heat source. Good air flow over the affected area helps, as it cools the affected parts by convection, it has no effect on the radiant heat transfer.

Sorry to hear you windowed the engine.

Rex

Definite good points. I talked with Daryl after speedweek and mentioned some 321 schedule 40 manifolds to replace the headers. Hopefully he'll bring me the car again and we can make that happen along with some more thermal management. Big difference in dealing with heat in 1 mile vs 5.

[revolutionary]

Been far too long since an update, but it's been a crazy year. Now moved full time to Orlando from TX and had the car back up in Nashville for Coffey Fabrication (JavaJoe79) to make some new exhaust. We ended up with 321ss stepped log style manifolds which are so much more convenient than the headers we had before. Power is not really an issue at this time, so I don't think we will be hurt by the design.

[revolutionary]

You should have seen the rust damage - oof! Destroyed the rear brakes. Not sure why but the front brakes were actually pretty ok. The magnesium case on the Lenco is not too happy either.

[revolutionary]

FYI This is where the rod tried to exit the pan. It just destroyed the block instead...

[jl222]

 
  We've had rust on rotors before but nothing like that

  Did car go thru water or forgot to wash them? We replaced our rears with Mark Williams Interprises brakes.

  No front brakes for us this year as caliper pistons were frozen and can't find replacements with 6'' lug spacing and 11/4
wide rotors.

  Bville salt 

  Going to make Bvill?  Car looking good, should be a 300 mile contender. Hope to see you there.

    JL222

[Rex Schimmer]

Love the new headers!! 321 plus some extra wall thickness should be a great set up for the "White dyno".

Rex

[revolutionary]

FYI Some pics of the carnage from last year...The end result was junk block, crank, rods, pistons, cam, valves, and lifters. At least the heads were fixable. I had Reher Morrison freshen up the valve job and surface the heads. New cam from Lil John. New Bryant crank, Crane lifters, PAC springs and retainers, Manley valves, Comp pushrods and bought a Dart block from a friend. The new engine is 4.530" x 4.250" ( 548 cid) so just a little smaller that the old 555. Turbos are still in great shape at least.

[manta22]

Any idea what started this disaster? Did the cap come off the unbroken rod shown in your photo?

Regards, Neil  Tucson, AZ

[sabat]

Oof. It's amazing how some pictures make you involuntarily cringe.

Glad the heads and turbos are OK.