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#21
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^ to the contrary, cheap pushrods are cheap insurance. Sort of like fusible links.
Back in the 1980's a friend had a 455 built by a local shop. As with Dave's motor, they installed 1.7" springs without measuring or checking. They DID use stronger pushrods. When we pulled the valve covers, the strong pushrods had shish-kabobbed the rocker arms. Also wiped out the cam, lifters, and stud damage. If everything is checked, test fit, measured, and adjust properly, THEN high quality pushrods are a good thing :-)
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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
#22
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Too far from home. I have it at RAD in Ludlow, MA. He's built a ton of motors for friends of mine. And he's in HMM a lot lately. He also builds all the circle track motors for the local track, Stafford, CT. Sent from my iPhone using Tapatalk |
#23
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The shop that messed it up is in Hamden, CT. About 1:15 from my house with no traffic. It was a pain going there all the time.
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#24
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Quote:
He now has a block and head machining center. |
#25
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That was a stock, bottle neck stud that broke. It was cracked previously[you can see the darker shade in the broken part of the stud], and why it broke now. I never use bottle neck stud anymore because of stuff like this. Don't use stock pushrods either. They are too thin, and weak. You can see how the end of the pushrod was getting eaten alive, and it turned blue. Rod bearing got hammered on. May have had too much clearance, or if it lost oil pressure, that could have done it.
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Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
#26
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I usually take engine completely apart before taking to shop.my labor,time is mine. Take out all plugs.I don't leave them ,freeze plugs,in block as I've seen many years ago hsppen.Then I use rifle brushes and clean as best as I can to get major dirt out.Then inspect bearings.Leave with rods and mains.Then take it to shop.I take apart new oil pump for contamination. Saw a large paper clip yrs ago in one so I make sure. I'm no machinist but I can clean and remove metal flash.Mine have been basic stock type engines.never have broken a stud like yours even bottle neck studs,pulled old press in out.Even in my SD stocker,seen 6400 a few times.I check installed height of springs before fire up.Sorry for your issues I had to redo my first SD engine luckily never fired.Lerned!! $$$$
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#27
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I think he left it together for the new builder to see if anything in the rotating assembly is a miss.
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__________________
Giving To Others!!! V.P. Pioneer Valley GTO Association www.pvgto.com 67 Lemans 455 best et. 12.023@ 111 mph LVD 9/2008 68 GTO H.O. in progress? |
#28
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Looks like chevy guys work there?
There lost when it comes to something else. GT. |
#29
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You know the one thing I didn't do to my assembled engine setting on the stand. Clean out the oil galleries when I got it back from the shop ..... it had been bored, decked, cleaned, new plugs both oil and water.
I probably should call the machinist and ask him if it's his usual practice to thoroughly clean before putting in all the plugs .... would seem like a no-brainer right? I hope so |
#30
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If you still have the valley pan off a quick dip into the lifter feed holes likely will be very telling.
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#31
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Yes the valley is still open ... thanks for the tip.
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#32
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Quote:
That's right. Sent from my iPhone using Tapatalk |
#33
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Even if the other passages were cleaned, all sort of machining debris and migrate to that area, and get stuck in the old crud that has built up in there. Then when the motor is started, heated up, and oil starts flowing, the debris will fall out. I'm speaking from an actual experience, not just speculating. It will cost you some time and some gaskets & plugs to verify your passages are clean. If you roll the dice and lose, you'll need all the gaskets, MUCH more time, new bearings, new oil pump, and to have the crank turned again (if not replaced, depending upon the amount of debris). The debris could also cause your lifters to fail, or "tick" forever.
__________________
'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
#34
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Talked to the new shop today. The block needs to be bored. Crank needs to be cut again, so I'm just gonna get a whole new stroker rotating assembly. My stock rods need to go anyway. So I'll have a .030 over bore with a 4.25" stroke. My cam is worn out too. So I'm going to go with a hydraulic roller. Any suggestions?
Sent from my iPad using Tapatalk |
#35
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Dave Paul has a nice roller cam for sale?
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__________________
Giving To Others!!! V.P. Pioneer Valley GTO Association www.pvgto.com 67 Lemans 455 best et. 12.023@ 111 mph LVD 9/2008 68 GTO H.O. in progress? |
#36
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Quote:
Are you sure? I just spoke to him and he didn't mention it. Sent from my iPad using Tapatalk |
#37
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I think it's like 517 lift. I was gonna buy it last year but I went bigger.
Sent from my XT1254 using Tapatalk
__________________
Giving To Others!!! V.P. Pioneer Valley GTO Association www.pvgto.com 67 Lemans 455 best et. 12.023@ 111 mph LVD 9/2008 68 GTO H.O. in progress? |
#38
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What heads are you running? |
#39
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I've already showed the first shop most of the things he did wrong. He says it's my fault for over revving it. He's an asshole. I am running 71 #96 heads. They are not ported. The new shop is going to do a valve job and install new guides. They are worn too. He said he's going to do some bowl blending too. Sent from my iPad using Tapatalk |
#40
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Off Topic Post ... Sorry
Quote:
Thanks again. |
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