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#102 (permalink) |
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former opel racer
Join Date: Nov 2002
Location: near some glaciers
Posts: 2,863
Real Name: Jeff "Oh-Oh" Denton
![]() Provided Answers: 4
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Rally Bob's recommendation is to angle mill the head .080" on the spark plug side, zero or minimal on the manifold side. The quench area is not affected, only the volume of the chamber, and the timing of the camshaft. To affect the quench area you mill the block to give a maximum of .005" of piston sticking up above the deck. This is to increase CR, but I know the reason you are asking. This might work, it's worth a try. Yes you must spot face the bolt holes. No big deal. Be sure to grind some more room around the chain as mentioned before, you will appreciate this later, believe me!
The dimension of the head, from the deck to the valve cover, is unpublished and we need to keep it that way, OK? It comes up every time we discuss this. This is not just me asking, it was asked of me by several of the best known Opel racers. You know, the famous ones, er, the ones you see on TV sometimes. I hope this will fix your head. If not, the bigger gasket will, but then we'll have to talk you into going to the bigger bore to match! And the 2.2 stroke... oh and longer stronger rods... and the light flywheel... where does it stop?
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No Opels were harmed in the filming of this movie. However two Mustangs, a Pinto, and a Capri were hospitalized. One Mustang was euthanized the next morning. |
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#103 (permalink) |
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Opeler
Join Date: Oct 2006
Location: Las Vegas
Posts: 10
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In over my head?
Ugh, several months ago I bought a rebuilt short block and an old head with "bigger" valves and a "reground" cam. I'm planning on reusing the timing chain. My problem is that I have no idea how much of the block was milled, I had the head decked and I don't know how much came off at that point or how much may have been taken off previously, and I don't know anything about the cam. My head hurts after reading the 5 pages of previous posts...can I bolt this thing back together or is that just a bad idea? Where do I start?
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#104 (permalink) |
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2200 Post Club
Join Date: Jan 2003
Location: Chapel Hill, TN
Posts: 2,267
Real Name: Harold Collins
![]() ![]() Provided Answers: 14
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Timing chains are CHEAP! Unless that thing has almost no miles on it I would think about a new one. I lectured a student on the evils of trying to save a dollar by using the old timing chain set in a Ford. After his had jumped time. I did the same thing later on an Opel because I wasn't going to keep it that long. That darn car ran and revved sooo well! I was lucky when it broke, I was able to coast all the way into my parking spot in front of my apartment.
![]() NEW CHAIN, $20+/- ? Harold |
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#105 (permalink) | |
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2200 Post Club
Join Date: Jan 2003
Location: Chapel Hill, TN
Posts: 2,267
Real Name: Harold Collins
![]() ![]() Provided Answers: 14
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Harold |
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#106 (permalink) | |
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1970-GT
Join Date: Sep 2005
Location: Clearwater, Florida
Posts: 1,237
![]() Provided Answers: 2
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http://www.opelgt.com/forums/opel-en...-1-9-head.html Lyle |
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#107 (permalink) | |
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Member 1000 Post Club
Join Date: Mar 2002
Location: Ft Smith, Arkansas
Posts: 1,481
![]() Provided Answers: 1
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Bad idea... new ones are available from many sources.. OGTS, RockAuto.com, Parts America, Napa... etc
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Paul |
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#108 (permalink) |
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former opel racer
Join Date: Nov 2002
Location: near some glaciers
Posts: 2,863
Real Name: Jeff "Oh-Oh" Denton
![]() Provided Answers: 4
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What you've got is a modified engine. Without knowing just exactly how it's been modified, to assemble it you have to check everything. Everything as in piston height, valve clearance, valve timing.
It's just the basic engine building/blueprinting procedure.
__________________
No Opels were harmed in the filming of this movie. However two Mustangs, a Pinto, and a Capri were hospitalized. One Mustang was euthanized the next morning. |
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#110 (permalink) |
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Member
Join Date: Aug 2006
Location: Goderich, Ontario, Canada
Posts: 275
![]() Provided Answers: 1
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Adjustable Cam Sprocket
Here it is. Adjustable sprocket from Kent Cams, U.K. Perfect match to my angle-milled cylinder head.
Expensive? Yes. Could I do it without? Probably. Does it make me happy? Hell, yes! Can't wipe-off stupid smile the whole day. Opelitis, the worst form... |
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#111 (permalink) | |
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2200 Post Club
Join Date: Jan 2003
Location: Chapel Hill, TN
Posts: 2,267
Real Name: Harold Collins
![]() ![]() Provided Answers: 14
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![]() Harold P.S. A friend said he threw his in the river after failing to tighten the bolts enough and he destroyed an engine. Wish I had been there when he threw his little tantrum.
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#112 (permalink) |
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Project 1450 supporter...
Join Date: Mar 2002
Location: Pleasant Valley, CT
Posts: 7,452
Real Name: Bob Legere
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Wow, I just re-read this entire thread. I miss the days when we got into technical discussions like this without butting heads! Just an exchange of ideas, and people helping other people....
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My Flickr photos. Jan. 3, 1984 - Jan. 3, 2009, that's 25 years of this damn Opelitis! C.R.L. 9/22/69 - 12/8/99, J.M.L. 3/3/43 - 6/15/04 |
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