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SpectatorRacing | C4 Motor carnage (renamed) | ||
Elite Guru
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Take a look at the video, does this seem right to you guys?
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Posted on: 2011/7/19 13:59
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aka Scaryfast |
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SpectatorRacing | Re: Does this look ok to you guys? | ||
Elite Guru
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So here's what happened:
Cylinder #4 [IMG]http://i31.photobucket.com/albums/c380/jcisler/Corvetteblockcylinder4.jpg[/IMG] Right side head: [IMG]http://i31.photobucket.com/albums/c380/jcisler/CorvetteHead.jpg[/IMG] Piston #4: [IMG]http://i31.photobucket.com/albums/c380/jcisler/Piston4-1.jpg[/IMG] |
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Posted on: 2011/7/19 14:00
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aka Scaryfast |
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BillH | Re: Does this look ok to you guys? | ||
The Stig Moderator
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Crap, Jon.
Been there,done that. This ain't no Tee Handle to lift the motor with: Attach file: Ford.jpg (0.00 KB) |
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Posted on: 2011/7/19 14:25
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teebee | Re: Does this look ok to you guys? | ||
2014 Memorial Day Car Show Winner!
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Ouch, that's gonna hurt.......
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Posted on: 2011/7/19 15:16
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2007 Atomic Orange 3LT coupe. Borla Exhaust One of Americas' proud Deplorable |
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bogus | Re: Does this look ok to you guys? | ||
Grand Imperial Pooh-Bah
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That sucks... seriously sucks...
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Posted on: 2011/7/19 16:40
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Jeffvette | Re: Does this look ok to you guys? | ||
Elite Guru
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Looks to be within tolerances.
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Posted on: 2011/7/19 18:36
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SpectatorRacing | Re: Does this look ok to you guys? | ||
Elite Guru
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Jeff, you have a set of ported LT1 heads? i can't get ahold of the local guy I like and time is short...
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Posted on: 2011/7/19 19:10
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BrianCunningham | Re: Does this look ok to you guys? | ||
Senior Guru
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I know Ron (cuisinartvette) has several sets he was trying to sell
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Posted on: 2011/7/19 19:14
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Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
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SpectatorRacing | Re: Does this look ok to you guys? | ||
Elite Guru
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Thanks Brian. I'll check with him.
Although I just got back from the guy who did them the first time and he thinks he might be able to save it. That would be a dream. |
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Posted on: 2011/7/19 20:51
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pianoguy | Re: Does this look ok to you guys? | ||
Guru Emeritus
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Ouch - engine mojo!
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Posted on: 2011/7/19 21:22
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1996 LT4 �Before you criticize someone, you should walk a mile in their shoes. That way when you criticize them, you are a mile away from them and you have their shoes.�- Jack Handey |
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Matatk | Re: Does this look ok to you guys? | ||
Webmaster
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Holy crap. What happened?
Matthew |
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Posted on: 2011/7/19 22:04
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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crash | Re: Does this look ok to you guys? | ||
Guru
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sheeezz thats what my 427 looked like in my race car back in the day.
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Posted on: 2011/7/19 23:01
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SJW | Re: Does this look ok to you guys? | ||
Guru
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I feel your pain. What was the foreign object that the cylinder swallowed?
Live well, SJW |
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Posted on: 2011/7/19 23:52
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rklessdriver | Re: Does this look ok to you guys? | ||
Senior Guru
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Really sorry to see it happen.
A good cyl head man will be able to weld that chamber damage up easily. I've fixed far worse damage. As long as the debris didn't beat up the seats and valves it'll be pretty cheap to repair. Simple weld fee, some shaping/blending and re-surface. Make sure to check the rod out really good to be certain it's still straight. The way that piston is collasped is very interesting looking. With so little, the damage was definatly low speed - So I'm gonna guess it happened cranking over on the starter or shortly after firing. I am also curious as to what it ingested. Will |
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Posted on: 2011/7/20 2:05
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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SpectatorRacing | Re: Does this look ok to you guys? | ||
Elite Guru
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The debris is the #4 intake valve seat. It slipped out, got beat up by the valve, and half of it fell into the cylinder. It obviously got mashed around in there for a bit until it collapsed the water passage, which dumped water into the cylinder and eventually hydrolocked the motor.
Will you are correct, the failure happened at idle. Although the damage was caused by an extremely lean dyno run the day before. Last week I swapped a smaller TB on to try and choke some HP off and it had the opposite effect. My awesome MAP computer did not add any fuel to keep up with the higher air velocity (volume?) and ran between 14 and 15:1. Too bad the guy didn't look at the AFR before making three passes. But good thing I had him add a sniffer as I've run lean before. My guess is that the heads got hot and the seat may or may not have fallen out at that point. Afterwards, I put the other TB back on to correct the lean condition. I ran a warmup session Saturday morning, and noticed the car running a little funny. It actually seemed more like it was low on gas - hesitation in certain corners, etc. After the warmup I went across the scales and cut the motor. The car wouldn't refire because I killed the battery running the WP and fans while it was off. I jumped it and was driving back to my garage when it hydrolocked and the day was done. It did put down 414 RWHP before expiring Stock compression, pump gas... |
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Posted on: 2011/7/20 14:07
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Jeffvette | Re: Does this look ok to you guys? | ||
Elite Guru
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Quote:
Sorry, no LT1 stuff sitting on the shelf. As mentioned contact Ron. I know he had a bunch of stuff available a while back. |
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Posted on: 2011/7/20 22:43
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88BlackZ51 | Re: Does this look ok to you guys? | ||
Senior Guru
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Quote:
Sounds like you could use some 113 heads and a converted LT1 intake on the shelf. |
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Posted on: 2011/7/21 3:13
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BillH | Re: Does this look ok to you guys? | ||
The Stig Moderator
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[quote]
SpectatorRacing wrote: Last week I swapped a smaller TB on to try and choke some HP off quote] Comes under my "Things that bug me a little bit about NASA" list. |
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Posted on: 2011/7/21 13:14
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SpectatorRacing | Re: C4 Motor carnage (renamed) | ||
Elite Guru
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It's not so much that, Bill, as it is the pitfalls of building a car before you know into what class you want it to fit.
I'm tempted to drop my LS2 in it, the 360 hp at the tire in that car is just about perfect Or I could go run SCCA...wait, no I can't. There is no class for a C4, except maybe the BS catch-all that is ITE. |
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Posted on: 2011/7/21 13:42
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SpectatorRacing | Re: C4 Motor carnage (renamed) | ||
Elite Guru
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BTW anyone recognize that head gasket in the first picture? I can't find my notes on it.
Looks like this one: http://www.oreillyauto.com/site/c/det ... gasket&pt=02289&ppt=C0026 You guys have a better recommendation? |
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Posted on: 2011/7/21 13:50
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BillH | Re: C4 Motor carnage (renamed) | ||
The Stig Moderator
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Quote:
Nah, it's just the dyno/horse power thing in NASA bugs me. I think cause NASA is based in Ca. Build first then think about racing happens a lot and you're stuck. ITE's a great class but you have to build to the class first, not try to fit in. I have great respect for NASA as an organization and have had a NASA license. Just don't like the class structure. Of course, as you know, I'm not big into racing production cars anyway. Though I do like silhouette - GT1. |
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Posted on: 2011/7/21 14:41
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rklessdriver | Re: C4 Motor carnage (renamed) | ||
Senior Guru
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Quote:
I can tell you it's a Fel Pro by the blue silicone impregnated beads around the water ports.... beyond that I have no idea. Should have the PN stamped on the underside where the pushrods go thru (top of the deck by the lifter valley). If you can't read it or find a PN on it then take a caliper, meaure it's compressed thickness and the bore. Fel Pro list the gasket specs on Summit so it should be easy to match up. As for recomendations... it would depend on where the piston sits in the hole, ie piston to deck. Will |
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Posted on: 2011/7/21 21:22
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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SpectatorRacing | Re: C4 Motor carnage (renamed) | ||
Elite Guru
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Found the part number, it was still legible (1074). Gaskets coming Saturday. Now all I need is a head to put on the gasket. Minor details...
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Posted on: 2011/7/22 13:51
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