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#21
03-08-2012, 07:33 PM
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It is a HUGE bummer to have a fresh 505 all F'ed up due
to some lousy ass HEADERS   I hope that you can clean everything up, re-assemble and get back to Pontiyaking with this thing. Keep us posted on how things go and good luck!~
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Knock Knock Knockin' on 11's Door '70 Judge, Palladium Silver w/Red Interior Powered by SD Performance, Ported 6X Heads 501 HP, 554 ft lbs TQ 12.14 ET @ 114 MPH , Supercase Muncie M22, 3:55 Suspension: HO Racing, BMR< Sykorat, and Bilsteins Narrowed 12 bolt , 16x8 VintageWheel Works, Comp T/As on street, MT Drag Radials @ Strip http://www.sdperformance.com/custome...1.php?carID=42 |
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#22
03-08-2012, 07:52 PM
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Why does this reversion happen, is it cam choice?
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#23
03-08-2012, 08:14 PM
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I get the header idea, but, if it started I would think the exhaust pressure would be mostly in an exhaust direction. Thereby blowing most of the rust out! Reversion when the engine is running is way less than exhaust pressure. We're talking a lot of foreign debris to cause enough build up to fill the quench area.
Not to mention he's finding it in the intake as well. That's a lot of reversion. If he's getting it from the headers he has other problems to make it all the way to the intake. IMO
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1978 Black & Gold T/A [complete 70 Ram Air III (carb to pan) PQ and 12 bolt], fully loaded, deluxe, WS6, T-Top car - 1972 Formula 455HO Ram Air numbers matching Julep Green - 1971 T/A 455, 320 CFM Eheads, RP cam, Doug's headers, Fuel injection, TKX 5 Spd. 12 Bolt 3.73, 4 wheel disc. All A/C cars |
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#24
03-08-2012, 10:23 PM
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Well, it's an extreme case, but it's a very large motor. A 535 has a lot of swept area, so it's possible that a strong downward stroke with the exhaust valve open could create a decent amount of exhaust vacuum.
During cranking, if cylinder 1 fires while cylinder 5 exhaust is open, you could get a strong toke on the #5 primary tube. If a set of headers made me tear a motor down twice, that would be one former set of headers!
__________________
I could explain all this to the girl at the parts store, but she'd probably call the asylum. White '67 LeMans 407/TH350/Ford 3.89... RIP Red '67 LeMans. 407/TH400/Ford 3.25 |
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#25
03-09-2012, 12:47 AM
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It didn't really start.It sounded like it ran through about once then locked down.I'm not happy with those headers,but it's 1200 dollars to get new ones.These are going to get acid dipped,cleaned and coated.We started cleaning them tonight.There was still an impressive amount of loose metal in them.I hope there not rusted through.
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#26
03-09-2012, 12:17 PM
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Quote:
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#27
03-10-2012, 05:28 PM
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Quote:
__________________
 www.bowhanger.com468 poncho powered 66 cutlass 77 Trans http://s1059.beta.photobucket.com/us...rnout.mp4.html |
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#28
03-11-2012, 03:50 AM
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No.I would have to have another set made for the car.If I can't get these as clean as they need to be that's what I'll do.
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#29
03-11-2012, 01:57 PM
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http://www.qccoatings.com/
these guys do a great job at a fair price! They generally turn stuff around in 1 week. Plus the coating is supposed to be worth 10 or so.
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EHTTFMF!  Being dead, it is not hard on you. You don't even know you're dead. It is hard on everyone else that is not dead. BEING STUPID WORKS THE SAME WAY! The rest of us suffer. |
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#30
03-11-2012, 02:15 PM
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The old test for a bad intake valve is to hold a piece of paper near the tail pipe and see if it sucks in. Could some bent or burnt valves cause the rust to get sucked in?
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Never time to do it right, always time to do it over. Mearl 66 GTO 389 4 spd 76 T/A needs everything+ 77 T/A original, needs restored 78 T/A WS6, SBC400, fun but needs work |
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#31
03-12-2012, 03:02 PM
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When the rust got in the engine it also got under the valves,keeping them from closing.So it could have perpetuated the problem.But it was a fresh valve job with 16 brand new titanium valves before we tried to crank it.
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#32
03-13-2012, 11:58 PM
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gata,
Agree with others here that the headers are the source of your troubles. We have seen header rust and even fabrication debris left in the tubes do major engine damage. Those look like the heads we did for you a few years back. I have the cam specs if you need them...PM me if necessary. |
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#33
03-14-2012, 01:14 AM
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Man that sucks! Sorry
 I just got a pep talk on this very subject. I'll be building my own headers for my car in my garage with the help of a friend (25 year Navy fabricator and nuclear certified welder) and I plan on being extremely cautious about this. I'm thinking I may actually spend the extra money for stainless tubing so rust will be less of a factor. This is the second engine I've heard of sucking in debris through the headers on start up
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James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind Holley Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
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