IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: Scoobum on June 19 2016, 09:17:10 PM
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Hadn't changed the headgaskets in my car for a few years...so I thot it was time. In the second round I'm dead even with a 2nd gen big tire Camaro...and the car noses over on the 2-3 shift...WTF!! Save the file and go back to the trailer...and the boost and KR are through the roof...WTF!! As I'm making a Molotov cocktail to burn the POS, I notice the adjustor rod on the turbo is all the way over to the drivers side. I put down the lighter and Molotov cocktail and grab a pair of pliers and pull on the adjustor rod...and it pulls back to the drivers side. Either the weld has partially given way on the puck...or the puck somehow jammed...and then fell off down the DP. I sent Jason a pic from my cell...maybe he can post it. I'm open to suggestions as to what happened to the puck...or arm it's welded too. I had to clean up the inside of that RJC DP for the biggie puck to swing free when Jason started selling them years ago...so I'm lost as to what happened. We'll find out tomorrow when we pull the engine and get a look inside the DP.
On a good note the car ran 7.31 at 99 on an easy 1.81 launch in shitty air on 22 lbs. Low gear 02's were 820's and high gear 02's were 780's. High gear timing was default and low gear timing 4 degrees over default.
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bad luck
I will be interested to see what you find. Have not heard of something like that before
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So, you broke it?
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Here you go
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One more reason to have a computer/OS with closed loop correction - might save your HGs in an overboost situation. Same goes for spark control.
Unfortunately there isn't an OEM system out there that offers this. The MAFT Pro does somewhat - but, it is purely an aftermarket offering. I believe there are some boost controllers/alcohol injection systems that can do the same.
If it isn't one thing, its another - eh, Brad?
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Yes bad luck Brad
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uh-oh
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Damn Son! Blow off valve for any motor raced regularly with expensive parts in it. :rock:
It's too hot to race anyway. Just leads to disappointment .
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Okay, Dan and I loosened the engine...and we'll pull it tomorrow. The puck is gone...and there's a small chunk of metal on the shaft that won't let it come out of the DP. The DP doesn't want to come out of the test pipe...so we'll spin it out tomorrow after the engine is out...and I'll get a pic of what's left on the shaft. I have a new puck assembly on the way from RJC. Engine oil is clean...so it's head gaskets...and we're back in the game.
What's disheartening is Dan and I just got the new transmission in the car Friday...and now this. I'm having way to much fun playing with these big tire cars to keep me down for to long.
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Damn Son! Blow off valve for any motor raced regularly with expensive parts in it. :rock:
It's too hot to race anyway. Just leads to disappointment .
A secondary wastegate on the intake charge pipe would be cheap insurance. But, having the puck fail (stuck in the exhaust housing?) is a pretty freak situation.
(http://www.tbssowners.com/forums/attachments/members-rides/68825d1452141366-my-purple-monkey-dishwasher-tbss-build-thread-engine11.jpg)
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We pulled the engine and put it on a stand...heads and intake come off tomorrow. Head gaskets are 3 days coming out of Brampton at 77 bucks each. Dan found an intake gasket locally. I sent a pic of whats left of the puck to Jason. He can post it later. Im at a loss to explain how the puck froze...and then broke away. I overboosted an engine a few years back...its on Youtube...Bria n Harper shot it. The vacuum hose between the port and actuator collapsed. How often does that happen. Ive got a new set of valve springs coming from Joe out of Montreal.
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You should have spares of that shit laying around! I still run across buick parts in my collection.
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Jeremy...the price of parts up here is insane...and are tough to get. 941 valve springs up here...are 240 bucks. Joes sending me Pioneers...cuz he can get them at cost for me. A pair of slicks are over 600 bucks. To be able to race every weekend, I have to nickel and dime everything. If it wasn't for Dan and Joe helping me...then I couldn't do it. My short times aren't the greatest...cuz I can't afford new slicks. I do the best with what I have.
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Here you go
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I hear ya Brad, I priced a set of the new MT pro radials. Guy I've delt with a lot and I'm still looking at $700 bills when all is said n done.
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Jeremy...the price of parts up here is insane...and are tough to get. 941 valve springs up here...are 240 bucks. Joes sending me Pioneers...cuz he can get them at cost for me. A pair of slicks are over 600 bucks. To be able to race every weekend, I have to nickel and dime everything. If it wasn't for Dan and Joe helping me...then I couldn't do it. My short times aren't the greatest...cuz I can't afford new slicks. I do the best with what I have.
It's a challenge getting things done on a shoe string when our dollar is in the tank paying 25% more than you did last time you bought some thing limits what you can do. Availability is another problem of the great white north. I pick up my head gaskets today $128.00 taxes in for the pair and I ordered them Friday was $100.00 last spring.......
I gotta stop doing this.
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$240 for 941s did you trying getting them thru a machine shop? I dug out my receipt from 2014 $ 156.00
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Damn that sucks. Sounds like I need to come visit with a suit case full of gaskets and springs!
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do you get hit that hard if you come across the border and pick them up?
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its the exchange on the dollar that does it, they sometimes let it slide depends on the crossing and how long you have been away they still want the federal tax that's 7%.
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If one is away 48hrs we can bring back a fair bit. For a quick pickup and turnaround I/we will get dinged the normal 13% harmonized tax.People keep mentioning duties but I have yet to see anyone charged with duties on retail purchases for personal use. ( Larry has it good if they only do the fed tax).
Half a tank of gas plus the time. its not a fun crossing on the weekend.I can just about squeeze it into a weekday morning.
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Sorry to hear about that, Brad. :( Especially so early in the summer. Hopefully you get it back in no time, even more modified! :icon_lol:
I hear ya Brad, I priced a set of the new MT pro radials. Guy I've delt with a lot and I'm still looking at $700 bills when all is said n done.
A couple years ago the guy I buy my parts from was going to sell them to me for exact price but in Canadian dollars, I ended up picking them up last year. Paid a shade more but still a good deal.
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The engine took a hard hit...as it blew out both middle cylinders on the HG's. I'm having the heads skimmed tomorrow at a friends machine shop...and pick them up Friday. Joe gets the valve springs tomorrow...and is shipping them to my house. Pioneers are cheaper and he gets them at cost for me. Part number of the valve springs is RV 1943X...for those interested.
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Heads will be ready tomorrow. Spark plugs, head gaskets, intake gasket and rocker gaskets have arrived. Waiting on valve springs and puck assembly.
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sweet! You will be beating up on those big tire cars in no time!
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Just got a text from Joe. He's shipping the valve springs to me tomorrow. Other good news is I checked each lifter today...and all are wearing normally. This engine might be a good test mule to see how long a flat tappet cam and lifters will last with 130 lb valve springs.
This is a CC 212/212 off the shelf cam with NOS GM lifters and Pioneer RV1943X valve springs. 15w40 diesel has been used from the outset. No ZDDP...let the fighting begin.
This engine has been taking a shitkicking since July 2014.
We slathered the cam/lifters in red break in lube...broke it in for 20 minutes...chan ged the oil and filter...and promptly took it to the track and beat on it like a seal pup.
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Valve springs arrived from Joe today. Heads go on tomorrow. Awaiting the puck kit from RJC. I have a WB here I should install as well.
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I have a WB here I should install as well.
Yes, you should. ;)
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and when you do, remember that if it is one that uses a Bosch sensor, it won't work right after a day of leaded racing gas
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Steve...it's a Powerdex AFX...if that helps.
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same one I have...assumin g it came with the ngk sensor, it is golden
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Lo and behold...Dan and I found a broken valve spring today when swapping in the new ones. Finish dressing the engine tomorrow...and drop it in Thursday.
These engines take a helluva hit when overboosted... and that's why I have the heads milled and install new valve springs.
I overboosted an engine a few years back...and twisted the DS head into a pretzel...and softened the valve springs so badly I floated the valves at the next event.
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Looks like Dan and I have a new welder. :rock:
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What's her name?
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Hahahahaha
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Sorry Steve! LOL!
Okay...the puck assembly is welded up and moving as smooth as silk. Jason calls for 1/16th clearance for the shaft to 'clean' itself...so that's what we gave it.
Next up is the muffler shop in the morning to stretch the test pipe a tad to fit over the DP smoothly.
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I would be pulling the pan and checking the rod bearings. Take the bearing out and measure it to see if it was pounded from the over boost at max rpm. Just and easy check for peace of mind.
Kevin
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Kevin, I overboosted an engine far worse than this a couple years back. Dan and I checked the bearings...and they were fine.
Engine is being dropped in tomorrow. I picked up a WB bung and cap...and installed the WB gauge on the dash in my line of vision. Stopping by the muffler shop today and grabbing new studs and nuts for the crossover. Changed 'em when the engine was out 2 years ago...but I'm anal about zero pre turbo exhaust leaks.
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Are the Heads still look ok inside.."Guides n stuff"
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Hopefully you can log that WB02 with your PowerLogger. Remember to convert the output to Lambda!
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Joe...with the exception of one broken valve spring...all seems well. Car returns to the track next Friday nite.
Joe...did you figure out your boost issue?
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No. Had to change the Starter. Checking things out on the week-end.
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Dan and I dropped the engine in this morning. Only thing left is the crossover pipe...starter and convertor bolts...and a few things up top. Finishing it in the morning and trailering it home Sunday morning. We have another TR coming in Monday morning that needs the transmission pulled. It never ends...
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Fired it up this morning...and all's well. SM numbers are bang on. Nothin' to do...so we pulled the trans on the other TR. The builder was aware it was fukd from day 1...so let's see if he does the right thing.
A quick thanks to Dan for the use of his shop and his help. Without Dan, Joe, and the support and help I receive on this board, I couldn't do what I do. Thanks to all.
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you'd probably do more with all the extra time you would have here trying to lead the blind :D