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entropy

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Posts: 8671

posted April 17, 2009 01:51 AM

Edited By: entropy on 17 Apr 2009 09:54

head repair

detonation at Texas Mile, #2 cyl

notice
- material gone between 2 exh valves
- cracks from exh to int seats

Andy said he wanted to try repairing it:

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zrexpilot

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Posts: 470

posted April 17, 2009 03:11 AM

so what exactly happened dowm there, how did it detonate, an whos andy, looks like he did an awsome job.

entropy

Moderator
Posts: 8671

posted April 17, 2009 03:40 AM

seems like we were running it lean and it holed a piston started eating the head.

Andy owns Metric MC in Houston, does awesome head work, has a FactoryPro dyno, builds motors like a surgeon.

He tells it like he sees it, no BS whatever.
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Dane

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Posts: 235

posted April 17, 2009 06:23 AM

Edited By: Dane on 17 Apr 2009 14:26

Where are the brass seats? Would have thought they would be sort of welded in. Karl, can that head be saved?

Shane661

Needs a life
Posts: 11494

posted April 17, 2009 06:26 AM

The 208 mph motor holed a piston? Did you have the logger going?

entropy

Moderator
Posts: 8671

posted April 17, 2009 08:34 AM

Edited By: entropy on 17 Apr 2009 16:35

Dane,
That head already had OS bronze seats, so repairing the seats in #2 was HIGHLY problematic, the new seats had to be machined specifically for ea valve, and they damn near touch.

The head is done, and i will fire it up on the current build in a couple weeks. :crossed fingers
If it doesn't fail on dyno, i will pull it and put it on the bench in case Doug & I need to build another midnight motor.

Shane,
Yup, the 208 motor holed a piston on Doug's 2nd pass

I had the logger going but AF trace was flaky on Sat; was running leaner than i liked on Fri 1(13:1), but i didn't look at any logs till Mon
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TRNorBRN6001

Needs a job
Posts: 2021

posted April 17, 2009 09:05 AM

Naughty injector???

Can't complain too much, I'd say it was a good sacrifice to the god of speed for that 208 and heavy change.
I will let you know this evening whats up with my bike. Cam chain and adjustable sprocket bolts were all "A" ok. I think maybe jumped a few teeth........but will look into it further.
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entropy

Moderator
Posts: 8671

posted April 17, 2009 09:37 AM

Gary,
could be a naughty injector, but since #3 cyl didn't look too far behind, it seems to be a more general issue.

The motor was tuned in a 90 degree dyno room, and Sat was 70's??

You pulling the head tonight??
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dougmeyer

Needs a job
moderated
Posts: 2713

posted April 17, 2009 12:31 PM

If all the pieces are in there it can't "jump teeth".
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KZScott

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Posts: 7235

posted April 17, 2009 03:42 PM

Andy does one hell of a job!
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WRECKSHOP

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Posts: 359

posted April 17, 2009 03:52 PM

quote:
Andy does one hell of a job!

He sure in the HELL does !!!

whitehendrix

Zone Head
fails!
Posts: 757

posted April 17, 2009 07:26 PM

thats amazing.. all of it.. but why mill with a 4 flute endmill?

thats just astounding what can happen inside a motor under the extremes with just a fuel variation.. sure it wasn't that little pulsation problem (even tho you fixed it..) rearing it's head under load or something?

thats just nuts man. andy is a monster tho.. thats amazing.
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Johnnycheese

Pro
Posts: 1008

posted April 17, 2009 09:03 PM

quote:
If all the pieces are in there it can't "jump teeth".

nope
APE head bolt broke
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MadMike

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posted April 17, 2009 09:21 PM

I have some singles I can send you... Gary/JC... The APE head bolts... well I will check in the morning and call ya...

and Karl, man the before and after looks great!!!
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TRNorBRN6001

Needs a job
Posts: 2021

posted April 17, 2009 10:09 PM

Thank you much MM. Shouldn't you fellas be asleep yet! Well, except Karl, he is just about to wake up! lol
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MadMike

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posted April 17, 2009 10:41 PM

Wow... I guess it is a little late... Karl must be sleeping in...

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entropy

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Posts: 8671

posted April 18, 2009 04:51 AM

quote:
Wow... I guess it is a little late... Karl must be sleeping in...

last night...

following in the tradition and methodology of 2 previous blind taste testing sessions with vodka, our drunken lil Latin group of 5 "experts" did Rum last night. I'm the token gringo.

process is simple:

1. Ladies serve up unmarked glasses of Rum & Colombian, Cuban, Nicaraguan snacks,

2. guys drink and fill out the rating sheets

3. repeat till complete

4. ladies tally up the results, bring more chicharron, empanadas, etc

5. guys sit around the table & polish off the bottle of the winner

6. Ladies clean up

I only do this in the name of science

oh my fukken head

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Phantom13

Zone Head
Posts: 736

posted April 18, 2009 05:08 AM

Edited By: Phantom13 on 18 Apr 2009 13:09

LOL Karl!

Sounds like you'd love it down here in Miami.

The "beaches" (say with thick cuban accent) are beautiful!
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entropy

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Posts: 8671

posted April 18, 2009 06:49 AM

Edited By: entropy on 18 Apr 2009 14:55

quote:
LOL Karl!

Sounds like you'd love it down here in Miami.

The "beaches" (say with thick cuban accent) are beautiful!

Hey Mike,

coño, estas cien porciento correcto!,

I LOVE Miami!.
1973-4 I peddled freight for Alterman Transport out of Opa Locka, then moved away

1978 moved to Coconut Grove worked in Coral Gables, moved away in 1981
1983 moved to Coral Reef area, worked in the Gables, moved to Ecuador in 86
1992 moved back to Coral Reef, but got transferred to venezuela in 1997

When I step outa the Miami airport, smell that soft humid breeze, hear the palms rattling, it feels like home to me.

light up a cig, sip a cortadito, ahhhhh....

And you are right again, the "beaches" are beautiful

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Phantom13

Zone Head
Posts: 736

posted April 18, 2009 07:35 AM

Ah hell, I didn't know all that!

You sure your real name isn't, "Karlos"?
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tcchin

Zone Head
Posts: 867

posted April 18, 2009 08:03 AM

Karlos Guntierrez

entropy

Moderator
Posts: 8671

posted April 18, 2009 08:23 AM

Edited By: entropy on 18 Apr 2009 16:28

quote:
Karlos Guntierrez

THAT's it!

But as much as i love masas de puerco con moros, picadillo, platano frito, etc, i could never really fit into the Cuban scene; them big cigars give me a head ache and dominoes confuse me.
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osti33