Guest Cronic Posted November 8, 2004 Share Posted November 8, 2004 Well out and about on one of the bridges, I see this nice Mustang GT and decide to go play. He flys past me, and I easily catch right up on him. Although there was a lot of traffic around, so I decided to back off until we could catch a free area to play around in. Low and behold, less then a mile down, and with plenty of bridge left, we get our chance. He's already taken lead, and is well into accelerating. I downshift into 4th, and Im off. He has well over a 1/16th of a mile on me, but Im reeling him in hard. 20psi is holding, and holding well. EGT's are around 1400, and the a/f is in the green. Everything's going well until I hear a little bit of detonation... So being as Im already about 3-4 cars behind him, I slow down and give it a sec to rest. Then up the fuel, and jump on it again... BOOM. My engine bay sounds like a machine gun is fireing off inside! Sounds like an open exahust harly! It's crazy. So I pull over on the WINDY and cold bridge, to assess the damage. At first it appears that the gasket on the turbo manifold popped. There was only 3 bolts holding it on. So sunday morning, bright and early I go to tear it down and see. Interesting, bolts are all fine, and gasket shows no signs of wear. So from here I assess... well perhaps the intake manifold gasket is leaking. So I tear all that down and check it out... the gasket is beat to shit, shows signs of carbon escaping from the #5 runner. So I replace, and put everything back together... Still does it. Oh wait, I think to myself.... head gasket.... So I call my friend up, and he confirms the noise as what I feared... DANGIT!!! I wish I hadn't put everything back together now... lol. So tired, and wounded from tearing 21 year old bolts off a car, I call it a day. Picking up a headgasket today, and starting tonight, with work and everything the car will be down until wednesday. Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted November 8, 2004 Share Posted November 8, 2004 *sings* pmm pmm pmm.... and another one bites the dust! Kinda surprising... figured you had WAY enough fuel... kinda not surprising... because 20psi on the stock turbo has got to be HOT... maybe all the fuel in the world couldn't keep that going? You guys always approach these things so nonchalantly... like... well I blew the gasket oh well heheh when I finally blew mine (not my fault... the head was installed with only one out of the two alignment dowels, allowing the HG to move around and get chewed up by the pistons) I flipped the f#*@ out! Almost sold the car... well it sucked then because that was my only car. Now I dread that it may happen again... I THINK I'm running safe, but this car likes to make me think that right before pulling the rug out from under me But at least now I have a second car so... well still hopefully nothing happens... the real bummer is it happened to you while you were racing that Stang letting him believe he got the better of you... THAT sucks! Quote Link to comment Share on other sites More sharing options...
Guest Cronic Posted November 8, 2004 Share Posted November 8, 2004 This blew on the new turbo. I DID have enough fuel on the old one. I was really pulling him in hard. It was fun. Mostly just a test run on the new turbo. Was the first time I was on 20psi on the new turbo. Quote Link to comment Share on other sites More sharing options...
Guest Cronic Posted November 8, 2004 Share Posted November 8, 2004 Oh yeah, and the reason Im not so worried about the HG is that it's not that big of a deal, just an afternoon of downtime. Im putting another stock gasket on there wednesday on my day off, and going for some more test runs to tune it before hitting the dyno up. Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted November 8, 2004 Share Posted November 8, 2004 Kinda surprising... figured you had WAY enough fuel... 20psi on pump gas blows a head gasket and there is surprise? Repeat after me: "OCTANE", "OCTANE", "OCTANE", "OCTANE", "OCTANE", "OCTANE", "OCTANE", "OCTANE"............ Quote Link to comment Share on other sites More sharing options...
Guest Cronic Posted November 8, 2004 Share Posted November 8, 2004 Scottie. I've been running 20psi on 93 pump for almost a year now I blew the HG on the new turbo, which is slightly bigger. I just didnt add enough fuel as I thought I did. Quote Link to comment Share on other sites More sharing options...
Clifton Posted November 9, 2004 Share Posted November 9, 2004 Scottie. I've been running 20psi on 93 pump for almost a year now I blew the HG on the new turbo, which is slightly bigger. I just didnt add enough fuel as I thought I did. With all that detonation I hope you didn't break a ring land too. What kind of AFR are you running? if you are on the edge of knock at 12:1 and think running a little richer to avoid knock is safe, it's not. In the summer I can only run 16 psi regardless if it's 11:1 or 12.5:1. Also what did you upgrade to? The stock T3 is already 60 trim, did you go T4. Quote Link to comment Share on other sites More sharing options...
Guest Cronic Posted November 9, 2004 Share Posted November 9, 2004 The ringlands are fine, the pistons still look in WONDERFUL shape for being 160K miles old. The HG was original! It was crazy.... I'll have more pix up later. I've been running 20+psi forever dude. in 90 degree 90% humidity weather. My car is usually at a 10:1 a/f all the time. Although with the new turbo, I hadn't gotten to dyno it yet. The turbo is a t4 wheel inside teh stock housing. Just a small upgrade. Im shooting for low 300's at 20psi. Quote Link to comment Share on other sites More sharing options...
Guest Cronic Posted November 11, 2004 Share Posted November 11, 2004 Everything is back together, and running stronger then every. Dyno numbers comming soon. Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted November 11, 2004 Share Posted November 11, 2004 LOL you and me dyno too damn much Quote Link to comment Share on other sites More sharing options...
zxtman Posted November 11, 2004 Share Posted November 11, 2004 EGT's are around 1400 where is your egt probe located? if it's at the exhaust port, you should stay below 1600 deg if it's on the down pipe, stay below 1400 deg Quote Link to comment Share on other sites More sharing options...
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