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| Forum name | 4G63 Tech |
| Topic subject | Looks like I bent some valves... |
| Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i67&topic_id=7188 |
7188, Looks like I bent some valves... Posted by BigBald, Sep-24-06 08:02 AM
So I took the 2g to Island dragway last sunday for a little test and tune with the AEM EMS. The car was completely tuned on the street a couple nights before by myself. So I wanted to put this tune to the test.
Everything that could have gone wrong did. I had to learn how to launch all over again using the AEM 2-Step and had to find the sweet spot with the settings. After running a 18.0@108mph and 17.0@109mph I was ready to give up. I decided to giveit one more shot but had one of those gut feelings. I change the 2-step yet again but this time it yielded me a 1.7 60'. I banged out second then third and went to go into fourth and got stuck. I tried to go into 4th again but somehow managed to go into 2nd gear and ended up spinning the car to 11500 rpms.
That run yielded me a 12.5 @ 97 mph. That run also made me blow all my intake rockers and lifters but one. I replaced the rockers and lifter and did a comp test which yielded 120 115 130 125. So after 2k on this engine and 6 track passes, I have to pull the head. To top things off, the tune from the other night was not the one I ended up with on the track. Some reason boost dropped from 25psi to 22psi which put me in another row on my fuel map causing me to run rich.
Car has alot more in it I am sure. After the head gets fixed, going to dump in some race gas and up the boost to 30-32psi.
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7189, RE: Looks like I bent some valves... Posted by 420a-Tnthewerks, Sep-24-06 06:38 PM
Wow what a blow to the balls. Hopefully the rebuild goes well and you can get some times.. I've been curious to see what your new setup was doing but I wasn't wanting to see this x(. Goodluck and keep in there!
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7190, RE: Looks like I bent some valves... Posted by FlyinEsi, Sep-24-06 07:13 PM
that sucks Jerrome. This definately wasn't the first post I wanted to read about your tune.
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7191, RE: Looks like I bent some valves... Posted by kelvinb1, Sep-25-06 06:19 AM
18 flat at about 110 sounds like a turbo honda
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7192, RE: Looks like I bent some valves... Posted by FlyinEsi, Sep-25-06 08:50 AM
Yeah, you must have really picked up on the top end...lol...I ran a 16.9 in my N/A talon @ 87mph I think.
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7193, RE: Looks like I bent some valves... Posted by Remy, Sep-25-06 10:07 AM
I am going to post a pic of his valve cover when i leave work.
EDIT: Damn i forgot I let my moms take my camera on her cruise. Bah. Got to wait a week for that. arh
 ---------------------------------------- GT35 and stuff. Lucky Number 6 ...
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7194, RE: Looks like I bent some valves... Posted by BigBald, Sep-25-06 10:14 AM
It's all part of the game.....things are going to break sometimes. I am pretty sure i could have gotten and 11.9-12.0 out of that run had everything gone right.
I pulled the head and the bottom end seems to be fine. Shouldn't be to long before i am back shifting at 9k rpms again. You can see where the valves and the psitons kissed each other....definitely not a pretty site.
I can live with a 12.5 for now.
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7195, RE: Looks like I bent some valves... Posted by Remy, Sep-25-06 02:37 PM

 ---------------------------------------- GT35 and stuff. Lucky Number 6 ...
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7196, RE: Looks like I bent some valves... Posted by StreetRacer_21, Sep-25-06 03:43 PM
Ah, that sucks
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7197, RE: Looks like I bent some valves... Posted by RST95eclipse, Oct-10-06 08:14 PM
Best of luck in the rebuild.
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7198, RE: Looks like I bent some valves... Posted by BigBald, Oct-11-06 09:56 AM
Everything is at the Machine shop now....just waiting for the call to pick it all up. After that, it's back to the track I go.
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7199, RE: Looks like I bent some valves... Posted by DR1665, Oct-12-06 07:38 AM
Glad to hear you're treating this as just a minor set back. Lesser DSMers would have parted it out days ago. :thumbsup
Go you, sir.
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7200, RE: Looks like I bent some valves... Posted by RST95eclipse, Oct-12-06 12:24 PM
Have a pic of the valve-smacked pistons while the head's off?
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