datzenmike Posted August 10, 2016 Report Share Posted August 10, 2016 What's '64 $15 worth in money today? Quote Link to comment
Stoffregen Motorsports Posted August 10, 2016 Report Share Posted August 10, 2016 Put in drill press, used some special lubricant meant for copper, spun while pulling down firmly on handle. Got this. That is seriously ingenious. Quote Link to comment
G-Duax Posted August 10, 2016 Report Share Posted August 10, 2016 What's '64 $15 worth in money today? Oh, probably $95...... 1 Quote Link to comment
That4doorKiD Posted August 1, 2017 Report Share Posted August 1, 2017 10-20 psi would an MLS composite hold with an O ringed block. I'm hesitant with going for a copper because of people saying they leak. But yah know how that goes when we share info from our brother's friend's uncle Jim's friend. Can you guys chime in that have used the copper gaskets? Thanks much appreciated Quote Link to comment
G-Duax Posted August 2, 2017 Report Share Posted August 2, 2017 Copper works pretty well if you don't have a rough machined block & head. And the steel gaskets will leak if the surface is rough, and everyone uses those on performance cars these days without leakage. But again, the surface is important. I have a 60 lb. lapping plate that I smooth my heads & blocks with. Some of the prettiest machine jobs I've seen, look like crap after a few passes with the lapping plate. I shows how deep some cut marks are, and how wavy some surfaces are. Here is my latest Toyota block, with a few passes of the lapping plate just after it came back from being surfaced. You can see that some of the marks are quite a bit deeper than surrounding areas. After a half a day lapping, these were all gone. Another thing I do, is spray a light coat of Copper Kote, than cure it in the oven at 250 degrees before installing the gasket. 2 Quote Link to comment
datzenmike Posted August 2, 2017 Report Share Posted August 2, 2017 I imagine this is better than just flat but not as good as O ringing??? 2 Quote Link to comment
Stoffregen Motorsports Posted August 2, 2017 Report Share Posted August 2, 2017 O-rings are usually steel. They hold up better than copper. X2 on the copper coat. That's the best way to ensure a tight seal, at least where water and oil are concerned. Quote Link to comment
G-Duax Posted August 2, 2017 Report Share Posted August 2, 2017 Mike, yes... If I wasn't a cheap ass, I would just buy a true multi-layer steel L4 gasket out of Japan, but they are like $200 on up, before agent fees and shipping :( Quote Link to comment
That4doorKiD Posted August 2, 2017 Report Share Posted August 2, 2017 Ahh I'll go with O ring and copper gasket. I just don't want any coolant to leak. Wouldn't a composite gasket work well with an O ringed block? Quote Link to comment
Stoffregen Motorsports Posted August 3, 2017 Report Share Posted August 3, 2017 Composite meaning steel composite (layered) or OEM style graphite coated composite? The o-ring would be too much for a layered steel gasket, but perfect with a graphite coated OEM style gasket. Quote Link to comment
Stoffregen Motorsports Posted August 3, 2017 Report Share Posted August 3, 2017 It has probably already been mentioned in this thread, but those copper "gaskets" weren't really meant to be gaskets at all. They were designed as a gasket shim to lower compression. They aren't that thick at all. Probably only .015" or thereabouts, vs the stock gasket's roughly .050". 1 Quote Link to comment
G-Duax Posted August 3, 2017 Report Share Posted August 3, 2017 Yup. Felpro shim.... .020" 1 Quote Link to comment
Crashtd420 Posted August 3, 2017 Report Share Posted August 3, 2017 Cometic gaskets will make custom gaskets, many different matterials... mls, copper, fiber, etc.... all in varying thicknesses.... No listing for l series so they would be custom... not to sure how that works or what it costs.... 1 Quote Link to comment
datzenmike Posted August 4, 2017 Report Share Posted August 4, 2017 Ahh I'll go with O ring and copper gasket. I just don't want any coolant to leak. Wouldn't a composite gasket work well with an O ringed block? The O ring is only around the cylinder not the water passages. If anything a copper gasket is more likely to leak coolant as the gasket does not crush to seal. Copper Kote spray should fix that. Quote Link to comment
That4doorKiD Posted August 4, 2017 Report Share Posted August 4, 2017 The O ring is only around the cylinder not the water passages. If anything a copper gasket is more likely to leak coolant as the gasket does not crush to seal. Copper Kote spray should fix that. didn't say that lol. I'm hesitant to do a copper gasket because of the water passages. The guy with the 73 620-t never had any problems so I'll probably just follow through with copper and O ring Quote Link to comment
datzenmike Posted August 4, 2017 Report Share Posted August 4, 2017 Ah, I see that now. Having a very flat smooth head and block will sure help. My 2.3 (if I ever get it done) has 1mm milled from the top of the block and some from the head so I know they are good. A 0.20" copper gasket is next. Compression shouldn't be over 10 so I'm skipping the O ring. Quote Link to comment
G-Duax Posted August 4, 2017 Report Share Posted August 4, 2017 Cometic gaskets will make custom gaskets, many different matterials... mls, copper, fiber, etc.... all in varying thicknesses.... No listing for l series so they would be custom... not to sure how that works or what it costs.... I called them a few months back on an L4 application, and was told no... Maybe I talked to the wrong person. Maybe it's just on engines they already are set up for. Quote Link to comment
That4doorKiD Posted August 4, 2017 Report Share Posted August 4, 2017 I already got my block decked and obviously will do the head too, hopefully the spray will do the job!!! Just bought some flat top SR pistons, next thing to do is O-ring the block and look for a U67. Quote Link to comment
distributorguy Posted August 6, 2017 Report Share Posted August 6, 2017 A phone call to these guys and send them a gasket. I bet they'd make any thickness copper gasket you want. I'm contemplating using them next year, with a thinner gasket to up my compression a bit. This could be a decent solution for big overbores as well. And they may also be able to supply custom stainless O-rings for your block? http://clarkcopperheadgaskets.com/cchg/modules/content/?id=1 1 Quote Link to comment
G-Duax Posted August 7, 2017 Report Share Posted August 7, 2017 Have you any idea what a custom copper gasket runs from them? Quote Link to comment
datzenmike Posted August 7, 2017 Report Share Posted August 7, 2017 So much I made my own. Quote Link to comment
Stoffregen Motorsports Posted August 7, 2017 Report Share Posted August 7, 2017 Thing is, even in a 16:1 race engine, a stock graphite coated gasket works fine. You need to have an o-ringed block to keep everything in check, but the gaskets hold up fine. Quote Link to comment
distributorguy Posted August 7, 2017 Report Share Posted August 7, 2017 They run about the same as a Nismo gasket from your local Nissan dealer, but I think its a 3-piece minimum for custom? Its been a few years. Quote Link to comment
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