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Re: Project 91 "SS" 3400/5spd
Posted: Sun Jun 28, 2020 10:53 pm
by woody90gtz
Re: Project 91 "SS" 3400/5spd
Posted: Tue Jun 30, 2020 7:22 pm
by Asylum
That's nasty Woody, but it could have been a lot worse.
Good luck with it!!
Re: Project 91 "SS" 3400/5spd
Posted: Wed Jul 01, 2020 10:17 am
by ifixalot
I feel for ya on that quarter panel damage. But at least it didn't hit in front of the rear wheel.
Re: Project 91 "SS" 3400/5spd
Posted: Wed Jul 08, 2020 3:15 pm
by Rettax3
Ouch! Glad you weren't hurt though, and if the rear wheel wasn't touched, I doubt you even need to worry about anything structural. Your car has always been solid despite being in NY, you should be able to fix that. GM brake hoses... I had almost gotten it pushed through at the shop I used to work at that if we did brake calipers, we would also do the hoses. Even the very conservative manager conceded that it wasn't a bad idea on at least the Chevys. He just wouldn't quite agree that by the time we were already doing $400 worth of brake work, an extra $9 per side with no extra labor would be worth it for the customer and for our liability. Honestly, as much as that sucks, the cool part is that you race that car, you put your money where your mouth is, so to speak. Damaged or not, respect has been earned by that car.
Re: Project 91 "SS" 3400/5spd
Posted: Thu Jul 09, 2020 11:13 pm
by woody90gtz
Re: Project 91 "SS" 3400/5spd
Posted: Sat Jul 11, 2020 6:21 am
by Rettax3
GM just seems to have brake hose issues -yes, I mostly mean what they come with originally, and from what you said your Goodridge may have a Goodexcuse, but I think there is something about how they route them, angles, proximity to other brake components/wheels, overall length or amount of flex, SOMETHING. Even after they have been replaced once, I've seen a small but noticeably higher rate of GM brake hose failure... Maybe after owning so many 3rd-Gen F-Bodies I just EXPECT them to fail, IDK.
Good plan for moving forward, and you have certainly kept a positive attitude -I would be hand-wringing every night for two weeks straight about the paint and the dent, you know, if any of my Berettas looked as clean as yours did to begin with.
You've already gotten it straight around that hard bend at the edge of the trunk-lid opening, you'll be just fine getting her straightened out.
...Tinfoil...
Re: Project 91 "SS" 3400/5spd
Posted: Sun Jul 19, 2020 11:38 pm
by woody90gtz
Crash video is up. I took the wife's video and played it in super slow mo and it looks like the front left did lock somehow once it was already too late. I felt the line pop on the straight though and it didn't stop for crap. But it makes me wonder what actually happened inside that master cylinder and what sealed off. After changing the LF hose it was the only one that needed bleeding, and I was amazed how little brake fluid it took. Wish I had my LF gopro going...could have answered some questions.
https://youtu.be/riry7WLK3eI
Re: Project 91 "SS" 3400/5spd
Posted: Wed Jul 22, 2020 12:31 pm
by ifixalot
Interesting video. Again, I feel sorry you messed up your car. I hope the repair goes well and soon!
When I've had rusty brake lines blow out, gravity drains all the fluid out. Unless air to displace the fluid can't get in
under those bellow like things in the reservoir seal. Maybe some gunk in the vent grooves?
Re: Project 91 "SS" 3400/5spd
Posted: Sat Aug 08, 2020 12:49 am
by woody90gtz
I'm not sure what the cause was. It surprised me when I opened the cap and it looked full. It wouldn't gravity bleed or pump/hold bleed until I slammed on the pedal with the line open. There has to be some sort of safety valve or something.
Re: Project 91 "SS" 3400/5spd
Posted: Fri Sep 18, 2020 11:29 pm
by woody90gtz
Re: Project 91 "SS" 3400/5spd
Posted: Thu Oct 01, 2020 3:53 pm
by EPfiffner
Damn, that was shaping up to be a good pass, 14.0 isn't too bad for a hurt motor. Good luck Oct 25th and it's great to see a young gearhead in the making!
Re: Project 91 "SS" 3400/5spd
Posted: Sun Oct 04, 2020 12:16 am
by woody90gtz
By the looks of the incrementals, it would have been another 13.5, but I need a 13.4. I have a few tricks up my sleeve, hopefully one of them will work.
Got it all back together and running and had to to take the intake manifold off again. (Which also means ignition, alt, ps pump, fuel rail, valve covers... It had a bad tick upon fire up (sounded like just one) and turned out to be a collapsed lifter on #5E. I could actually lift the rocker arm tip off the valve by hand. I tore that lifter down and couldn't find anything wrong with it...but it must have been damaged during the overrev. Looking back at pictures the "valve relief" smash marks on the piston looked the worst on #5, so it was probably the first one to get bashed. So I picked up a new ACDelco HL118. At least stock parts are cheap.
https://i.imgur.com/Hwf94K5.mp4 movement
Posting that video on Facebook, I also stumbled into a mod I hadn't heard about. Shane said you can take the springs out of LS lifters and put them in the v6 lifters. Supposed to help with higher RPM. My bro in law happened to have a dead 6.0 in his yard so I grabbed all 16 figuring I could get 12 good ones anyway. I soaked them in solvent for an hour and then fought with them for a couple more hours to get them all apart. The lifters out of my 3400 came apart easily at least...good reminder to maintain your junk! The LS springs are definitely heavier, and the main spring is also longer, so in the v6 lifter body it will have even more pressure than it did in the longer v8 body. Hopefully there's an improvement, because it was a fair amount of work.
Re: Project 91 "SS" 3400/5spd
Posted: Tue Oct 06, 2020 8:37 am
by EPfiffner
That 6.0 was nasty, no wonder it was dead! I can see why the lifters were a challenge to get apart. The stiffer springs sound good in theory and it's hard to beat free.
Re: Project 91 "SS" 3400/5spd
Posted: Tue Oct 06, 2020 9:37 pm
by woody90gtz
Yeah that 6.0 had a cracked block, so it was sitting outside a month or two with no heads. That doesn't help the lifters either. Should have seen them before the solvent! Needed pliers to get them out of their bores.
Took the car to work yesterday and today...running great. I'll put some more miles on it to get the fuel level down. That's easy weight reduction before racing. My dumb ass has screwed that up and raced on a full tank the last two times. I never used to worry about fuel because I could burn the majority of a tank on the way to the track...but not on a trailer! I've got a few tricks to try and drop the ET. Hopefully I can get there.
Re: Project 91 "SS" 3400/5spd
Posted: Wed Oct 14, 2020 10:45 pm
by woody90gtz
Took it for a datalog and noticed the o2 sensor is acting up again. It's had thing for a few years where it will start reading "lean" and add fuel after a couple hours driving. But it would only do it when it had been on a couple hour drive. Other than that it was fine. Shutting it off for a few minutes and restarting would buy you some more "normal" time before it acted up again. I tested a few things that all had no change, so I band-aided it with a tight maximum BLM in the tune and set my highway fuel to 15.8:1 AFR so even when it acted up it was still stoich. It's one of those things I've been meaning to get to the bottom of...but never got around to it. Well, now it's acting up in a 5 minute drive...so I gotta sort it out.
I had already ruled out the o2 sensor itself when I first ran into it. So my best guess was a bad o2 sensor wire that maybe had some broken strands and would heat up over time and add resistance. So I de-pinned the o2 sensor and ran a wire directly to the ECM with a new pin that I robbed from my 92 truck ECM conversion. That means it 100% bypasses the existing harness. Tested it out today and no change. So.....maybe the ECM itself? They aren't the most reliable things...