I have had to take my piston rings off about 2 or 3 times now since I decided to have extra work done to my pistons. I was wondering if this weakens them at all? I just have the new stock Toyota rings for aftermarket pistons.
I have had to take my piston rings off about 2 or 3 times now since I decided to have extra work done to my pistons. I was wondering if this weakens them at all? I just have the new stock Toyota rings for aftermarket pistons.
How many miles were put on the rings? Did you have the cylinders rehoned after removal? Did you put the rings back into the orginal spots (cyl: 1, 2, 3, etc...)?
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Light moves faster than sound. That is why someone may appear to be bright, until you hear them speak.
1987 Toyota Supra Turbo.
Rings are brand new, engine has 43,000 orginal american miles on it, engine has had full machining, powdercoated block, line hone and arp main studs, new weisco pistons and eagle h beam rods, with orginal toyota rings.
Rings are brand new, engine has 43,000 orginal american miles on it, engine has had full machining, powdercoated block, line hone and arp main studs, new weisco pistons and eagle h beam rods, with orginal toyota rings.
If the rings have zero miles on them then they should be good to go. Pulling them off and back isn't a good idea if you're man handling them, but if you're being gentle, they should be OK. Out of curiousity, why aren't using total seal piston rings if you're already having all of this machine work done?
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Light moves faster than sound. That is why someone may appear to be bright, until you hear them speak.
1987 Toyota Supra Turbo.
Because Total Seals have had a hit or miss history in our engines. Some well respected owners have suggested that it may be the material being too hard for the iron the 7M block is made from and they don't ever actually often seat properly, but they admit this is just speculation based on their machinists reporting that hard rings are not advised for our application as they won't seat properly most of the time. Others have speculated the forced induction thing that most SBC and Blue Oval guys don't use may be part of the problem, but I can't see how piston pressures could be that much of a problem...I could be wrong though, again as it is speculation.
Now, there are many that have used them with no problem, but the high rate of failure even in the hands of experienced and solid engine builders tends to get me to steer clear of them. Your experiences may vary.
I've used them before, but not on a supra, but have on a turbo VW engine. I've not had a problem with them, but they make many variations, including some for turbo/supercharger/nitrous applications in many different types of materials. So should I ever use them in my supra, your advice would be to use a softer material?
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Light moves faster than sound. That is why someone may appear to be bright, until you hear them speak.
1987 Toyota Supra Turbo.
Yeah, thats why I used the stock. They are supposed to be pretty good anyway. I'm not looking for wild numbers in horsepower, and my engine did not need to be bored so I just went with stockers. I will probably be taking it apart in a few years and boring it, so I figured why not just stay with them. Unfortuanantly, that will mean new pistons as well.
You could discuss it with them if you are planning on having them make a one off set, but otherwise, most of the high power guys stick to the stockers, or those recommended by their machinist or piston manufacturer. Myself, all the info out there is speculation at this point, so I would just steer clear and go to the known reliable choices.
I had the pistons and rods balanced, they are always off from the factory, and then I forgot to have my timing plate machined and then I decided to go with arp main studs so i had to get a line hone. My engine guy said the engine would be able to hold 500-600 hp with no problems, so if i ever wanted to.
I had the pistons and rods balanced, they are always off from the factory, and then I forgot to have my timing plate machined and then I decided to go with arp main studs so i had to get a line hone. My engine guy said the engine would be able to hold 500-600 hp with no problems, so if i ever wanted to.
I'm new to Supras, but not engine building. I'd been told that the factory set up, minus the head bolts and gasket, were already capable of 600 horses. I'd have to find the mulitple links again, but one described the 7mgte as a "factory detuned 600hp engine" and other sites had pointed to upgrading the head gasket to a HKS stopper for more than 600hp, without any info on the crank, rods or pistons. Could someone fill me in a little bit?
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Light moves faster than sound. That is why someone may appear to be bright, until you hear them speak.
1987 Toyota Supra Turbo.
No, your right, thats what everybody says. My engine guy is full service and has been doing it for over 40 years. He has a real high tech shop. He doesn't see many of my car in there, but he does do a lot of import work. That was just his conservitive view. Im the type of person that likes to have everything done the best to have the option to upgrade later if I want, and just for peice of mind.
Last edited by SupraTuned; 02-20-2009 at 02:01 PM.
No, your right, thats what everybody says. My engine guy is full service and has been doing it for over 40 years. He has a real high tech shop. He doesn't see many of my car in there, but he does do a lot of import work. That was just his conservitive view. Im the type of person that likes to have everything done the best to have the option to upgrade later if I want, and just for peice of mind.
Bravo!!
I've upgraded just about everything I could in my transmission, the R154, for the same reason, just piece of mind and knowing it is now more durable than before.
Hats off to you!
__________________
Light moves faster than sound. That is why someone may appear to be bright, until you hear them speak.
1987 Toyota Supra Turbo.
Yep and I want to start on the transmission next, but I think I will wait until she is in winter storage this fall
Ya, just don't skimp on the small stuff and she'll be very durable.
I was an Engineer for GM for several years. Alot of the designs I worked on were rejected. Finally, my manager told me I was "over engineering" parts. I never thought I was, I thought I was cutting costs in storage and extra production of replacement parts, but the deal is, dealerships and manufacturers make money off of broken items, as long as they break after the warranty. Sad but true. I wish I was part of the group putting together the Ford Lightning. I'd have had lots of fun with them I'd love to see a 300rwhp supra with JE pistons, billet rods, studed mains, etc...But no, if people put that kind of money into an engine they want gobs of HP, they forget about durability.
__________________
Light moves faster than sound. That is why someone may appear to be bright, until you hear them speak.
1987 Toyota Supra Turbo.
Last edited by ddouglas77; 02-20-2009 at 02:13 PM.
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