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#61
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I stick to the ones that really work, like the HP formula, inch's to millimeters, the CID formula, etc. to name a few.
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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 |
#62
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Is it a sign or what?
I woke up this morning from a dead sleep, rolled over and looked at the clock. It was 4:13! I think this is going to be a good day!
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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 |
#63
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The time is right!
I get a feeling like that whenever I happen to look up and the time is 4:21! (All hands together!)
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#64
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I like those pistons!
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#65
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They are a CP Bullet shelf piston now!
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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 |
#66
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Quote:
X2 |
#67
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Pistons look nice and shiny Love this thread.
Last edited by rohrt; 12-12-2014 at 01:45 PM. |
#68
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I get the same feeling when the clock says 4:55.
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#69
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I also have found "numbers gone crazy" trying to convert flow bench numbers even using the Superflow correction factor.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#70
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What is the benefit of the steel gas nitrided top ring? First I heard of them.
3.75/2=1.875+6.7=8.575 assuming deck height = 10.243 0 deck hight would have to be 1.668 If you piston CH is 1.630 that is roughly .038 you will have to take off the deck? Is that pretty normal to remove that much off the deck height? Is it better to have a taller CM piston at the expense of weight? At what point will you have intake fitment issues? |
#71
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Quote:
Quote:
1. People are using them in 40 year old engines that have probably been rebuilt before, and possibly been decked. This allows room for another deck job to clean it up good. 2. I have seen original, untouched factory 400 and 455 blocks come in anywhere from 10.250"-10.220". At 10.220", this only leaves you .015" to square up and zero deck a block. I had one Pontiac block that the deck was sloped .015"" before. Yeah, .015"! It started out cutting all the way across the deck, but about half way, the outside rear corner started sloping off, and quit cutting on it. It took .015" to get it cleaned all the way across. I've seen other blocks as far off as .020" from one side to another{not a Pontiac]. Back then, the machining was far from perfect, and sometimes it takes quite a bit to clean this stuff up. We always square deck, and deck at a 90° angle to the cam/crank centerline. This makes a truly square block, then it can be decked to whatever deck height you want. On my engine, depending on where the heads come out at, will either have the piston at zero deck minimum, or preferably .005" out of the hole. CP only offered this piston in .030", and .040" oversize. We talked to one of the piston guys at CP that we deal with and told them that these engines are old, and have probably been rebuilt, and bored oversize in the past, and 400 blocks are getting harder to find, so they should make them in .060" over also[for my case]. He talked to the head honcho, and they decided to offer it in .061" over now. Which brings me to my next point. This is no longer a 413 build, now it's a 412 build, since the piston is made for a 4.181" bore, so a 4.185" ring can be file fit to use. I thought they were going to make it for a 4.185" bore. Damn, don't know if I'll meet my power expectations now, without that cubic inch! I'm going to have intake fitment issue anyway, so that's no problem for me, but normally, it would just depend on the intake being used, and how much a particular deck needed to be cut. Some intakes like the RPM usually need to be cut anyway. They usually sit too high.
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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 |
#72
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I like it when I look up at the clock and the wife is turning off the alarm
And knowing I can go back to sleep for a while knowing that she's not Hogging the bed and snuggled up next to me and snoring like a freight train in my ear. Now That's A Good Day. LOL GT. |
#73
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Subscribing. Great thread.
Question: Quote:
Reason for my Q: I'm thinking the notorious overheating issues etc. reason is I've diff 400s to consider building...'69, '73, and spare '78 W72. Reading this thread has got me thinking of working our other 400 - '67 GTO w 670s & 4spd... |
#74
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I don't worry about .060" over at all, and I live in the desert! I have done several 389's at .090" over and they don't overheat. The overheating issues aren't from being bored out, it's more from the lack of sufficient water jacket in the heads, which is where the majority of the heat is. Just make sure the cooling system is good to go with the cooling mod tricks, and what not, and they'll be fine.
If you think about it, a block that is .060" over compared to one that is only .030", the cylinder walls are only .015" thinner on the .060" block. That's just 5 sheets of paper! If .015" is enough to make it overheat, then they were too thin from the factory. Even at .060" the cylinder walls are still .100" thick or thicker. The 389's I did .090" over, were around .090" on the sides of the cylinders[in between cylinders] and over .100" on thrust sides. They are fine.
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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 |
#75
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Well, I'm not happy with my chamber mods. They helped the exhaust a little, but did next to nothing for the intake. On a brighter note, I did find several things that DON'T work in creating more flow! I'm sure the mods will help with swirl though, which is some benefit. I think the flat chamber floor is hurting it also. I don't really like the shape of the chamber I did. It's not what I had pictured in my head. Will try a different shape on another chamber.
Now back inside the port!
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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 |
#76
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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 |
#77
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I'm sure in your profession you've heard the same, and point understood and taken your desert enviro that would manifest overheating if there were a problem w .060" or more. |
#78
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since your doing a 2.20 rod journal, any consideration to offset grinding to a 3.79 stroke?
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#79
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No, for the little I would gain, it would make the main/rod journal cross section thickness, that much thinner. I want the strength. I'm, already loosing some due to the 2.2" journal. De-stroking it would keep it the same that it is now, but then I would need a custom piston. Keeping it stock stroke, should give me enough room to get a good deck height. This engine has been rebuilt before. Stroking it .040" would also probably require me to use a custom piston as that extra .020" of height, would then put me on the edge of even being able to deck it to where I want to be.
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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 |
#80
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Rods came in today. They are Callies 6.700" BB Chevy rods with L-19 rod bolts. These rods have a lot of support on the big end, and around the rod bolts.
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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 |
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