5m-ge future engine mods?

Mk2guy · 06-28-2012, 07:04 AM

http://www.celicasupra.com/forums/sh...ston-Kit/page2

Here is the only place I have seen some one with pistons like mine, but I haven't heard anyone who actually has installed them, so it makes me nervous thinking about installing them. With that high of compression I am not sure if I could use pump gas either. I know headers allow you to run a bit higher compression, the aluminum head helps because aluminum cools quicker, but really I am just guessing. If I went that far I would have to have the block sonic tested to make sure that the cylinder bores can handle it and cryogenically freeze the block to make it stronger. (See the cost is already up there) Then I would have to have the heads flow benched after I ported and polished them, and then get a math guy to help me figure out if the stock cam would would need to be replaced, or if it is ok to use. Custom cams are cheap either. (not to mention getting the crank rebalanced) It would be different if my supra was a tidy one, but it isn't.

Toyota used these piston when they first started grand prix or Le Mans or something like that. They are primitive, Toyota technology at it's Genesis. That can't be a good thing. I don't think they are a good idea, so I am looking for someone who has tried this, to spare me the expense. ( Let me know if you heard of anyone doing this, other wise I will likely get curious and throw money at this project, like an idiot, just to find out.

Also, if you wanted to check if your rings are bad you can do a wet/dry comparison. Do your compression test then put oil, a few drops, in the chamber. It you get more compression with the oil in the chamber, like a lot more, then your rings are probably bad. You might be able to change the rings with the engine in the car. (I would have but my crank was bad)

06-28-2012, 07:04 AM	#80
Mk2guy Stock Join Date: Jun 2012 Location: In Worthless Idaho Posts: 22	http://www.celicasupra.com/forums/sh...ston-Kit/page2 Here is the only place I have seen some one with pistons like mine, but I haven't heard anyone who actually has installed them, so it makes me nervous thinking about installing them. With that high of compression I am not sure if I could use pump gas either. I know headers allow you to run a bit higher compression, the aluminum head helps because aluminum cools quicker, but really I am just guessing. If I went that far I would have to have the block sonic tested to make sure that the cylinder bores can handle it and cryogenically freeze the block to make it stronger. (See the cost is already up there) Then I would have to have the heads flow benched after I ported and polished them, and then get a math guy to help me figure out if the stock cam would would need to be replaced, or if it is ok to use. Custom cams are cheap either. (not to mention getting the crank rebalanced) It would be different if my supra was a tidy one, but it isn't. Toyota used these piston when they first started grand prix or Le Mans or something like that. They are primitive, Toyota technology at it's Genesis. That can't be a good thing. I don't think they are a good idea, so I am looking for someone who has tried this, to spare me the expense. ( Let me know if you heard of anyone doing this, other wise I will likely get curious and throw money at this project, like an idiot, just to find out. Also, if you wanted to check if your rings are bad you can do a wet/dry comparison. Do your compression test then put oil, a few drops, in the chamber. It you get more compression with the oil in the chamber, like a lot more, then your rings are probably bad. You might be able to change the rings with the engine in the car. (I would have but my crank was bad) __________________ With great cars comes great responsibility...... or not! Last edited by Mk2guy; 06-28-2012 at 07:07 AM.