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Old 02-20-2008, 11:41 PM   #1
greysave
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Default Motor Pics

Hand ported head far away pic.



cosworth head far away pic.



Hand ported head close up shot.


Cosworth head close


Axis stage 3 10 miles aftermath.
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Old 02-20-2008, 11:47 PM   #2
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Cosworths look amazing. What happen with that axis head?
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Old 02-20-2008, 11:51 PM   #3
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Not quite an axis head, axis valvetrain custom port job. the piston hit the valve.
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Old 02-21-2008, 12:06 AM   #4
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DAMN DUDE!! That sucks sorry to see that happened. What cams where you running?

-Rene
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Old 02-21-2008, 07:03 AM   #5
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so, I take it the cossie heads were the ones that ate it and now you are replicating them for you rebuild?...also what cams were you on?^^
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Old 02-21-2008, 07:22 AM   #6
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Quote:
Originally Posted by greysave View Post
the piston hit the valve.
sorry to hear that, but why?
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Old 02-21-2008, 08:29 AM   #7
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You can has stock AVCS mapping? lol..
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Old 02-21-2008, 09:34 AM   #8
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More details on what went so wrong...
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Old 02-21-2008, 10:13 AM   #9
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Quote:
Originally Posted by modaddict View Post
You can has stock AVCS mapping? lol..
Oh man that better not be what happened...
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Old 02-21-2008, 10:49 AM   #10
greysave
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Quote:
Originally Posted by Rene2.5RS View Post
DAMN DUDE!! That sucks sorry to see that happened. What cams where you running?

-Rene
Kelfords with 10.3mm of lift.
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Old 02-21-2008, 10:50 AM   #11
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Quote:
Originally Posted by Homemade WRX View Post
so, I take it the cossie heads were the ones that ate it and now you are replicating them for you rebuild?...also what cams were you on?^^
No the coswroth heads are brand new. I am about to use them now.
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Old 02-21-2008, 10:51 AM   #12
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Quote:
Originally Posted by modaddict View Post
You can has stock AVCS mapping? lol..
I really don't know what you are saying there, but the avcs was set by phil on a hydra. I really don't know how much advance it was running I'd have to talk to him to find that out.
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Old 02-21-2008, 11:12 AM   #13
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Quote:
Originally Posted by greysave View Post
Kelfords with 10.3mm of lift.
Well that makes me worried about getting my cam timing spot on. I will be running Cosworth 278/274 with a 10.7/10.00mm lift when I get my motor back.

-Rene
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Old 02-21-2008, 11:21 AM   #14
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So why did this failure happen...?
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Old 02-21-2008, 04:38 PM   #15
BallPeenHamr
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Man, those cossie heads are the secks! Good choice...
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Old 02-21-2008, 06:23 PM   #16
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Quote:
Originally Posted by greysave View Post
I really don't know what you are saying there, but the avcs was set by phil on a hydra. I really don't know how much advance it was running I'd have to talk to him to find that out.
If it was phil, then I'd probably trust how he set your avcs mapping up. assuming he knew you had cams.

Quote:
Originally Posted by Rene2.5RS View Post
Well that makes me worried about getting my cam timing spot on. I will be running Cosworth 278/274 with a 10.7/10.00mm lift when I get my motor back.

-Rene
you will have to change the total amount of avcs, most likely. Or a valve has a good chance of tapping a piston.

(assuming you run avcs)
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Old 02-21-2008, 07:20 PM   #17
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Huh. So this is what actually happened to this motor, eh? I remember this from the Ron&Phil thread a while back...just supposedly tooling around town, decelerating from 4K, "tink", and it immediately shut down.

Did you ever determine if this was an assembly error, or an AVCS tuning error? Seems to me that it was likely one or the other...
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Old 02-21-2008, 08:39 PM   #18
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Quote:
Originally Posted by PPhilthy View Post
So why did this failure happen...?
The valves hit the pistons because wrong spec pistons. I don't think there were any valve reliefs cut in these pistons.

Quote:
Originally Posted by flycaster View Post
Huh. So this is what actually happened to this motor, eh? I remember this from the Ron&Phil thread a while back...just supposedly tooling around town, decelerating from 4K, "tink", and it immediately shut down.

Did you ever determine if this was an assembly error, or an AVCS tuning error? Seems to me that it was likely one or the other...
I agree with that it could be either. But on the other hand this was my second motor this particular motor has had 3 separate failures the third one being catastrophic didn't make me feel like I wanted to mess with this builder anymore personally. Besides a car with oversized cams and oversized valvetrain should have pistons with valve reliefs right? I don't see any valve reliefs besides the ones the valves relieved them selves on.

Last edited by greysave; 02-21-2008 at 08:48 PM.
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Old 02-22-2008, 12:39 AM   #19
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Quote:
Originally Posted by modaddict View Post
you will have to change the total amount of avcs, most likely. Or a valve has a good chance of tapping a piston.

(assuming you run avcs)
06 WRX does have avcs and I bought the avcs cams from cosworth. And pointers on getting the avcs dialed in? is it possible to just zero out the avcs table during break in?

Quote:
Originally Posted by greysave View Post
The valves hit the pistons because wrong spec pistons. I don't think there were any valve reliefs cut in these pistons.
My Wiseco 100mm (0.5mm oversized) pistons are dished as well as have valve reliefs in them. I would agree that it is odd that yours do not.

-Rene
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Old 02-22-2008, 01:19 AM   #20
flycaster
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OK, you have my curiosity going. If you're up to it, let's do a little autopsy work here:

How did the other pistons look?
Did you hear any light "tapping" or "ticking" at any other time during that first 10 miles?
Make and model # of the pistons?
Headgasket thickness?
Was anything decked?
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Old 02-22-2008, 04:16 AM   #21
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Only ONE cyl? Where are the pics of all 4?
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Old 02-22-2008, 04:16 AM   #22
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double post
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Old 02-22-2008, 08:33 AM   #23
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Please take a picture of your pistons.

Please also take a picture of the cylinder heads (I wanna see the valves).
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Old 02-22-2008, 08:35 AM   #24
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Quote:
Originally Posted by Rene2.5RS View Post
06 WRX does have avcs and I bought the avcs cams from cosworth. And pointers on getting the avcs dialed in? is it possible to just zero out the avcs table during break in?

-Rene
Yes, it's possible to zero the table.

The best bet is to contact a tuner and see what amount of avcs they use for your specific pistons and cams. With those cams, for sure you won't be able to run the 30* or whatever the stock map provides.

tune her up to you hear the noises and back her off a little
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Old 02-22-2008, 10:35 AM   #25
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Quote:
Originally Posted by greysave View Post
The valves hit the pistons because wrong spec pistons. I don't think there were any valve reliefs cut in these pistons.
Would you please post pics of the other three pistons and valves...? If it was wrong pistons, I would think every piston would be trashed...

So this motor was built by Ron?
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