N/T pistons VS. T pistons

[bambam]

Alright I am converting my 90' n/t laser junker to turbo with my spare parts from my GSX. I have 1 question if I swap out the n/t pistons with pistons from a turbo block will the block be just as strong as any stock turbo block or are there more internal differences (besides head,wiring, and all of the bolt-ons). I need to know because I have a spare 16G and im throwing it on. (block needs to be able to handle it)
Thanks

 

[DarkendSoul]

Im not sure about the reliability of the Chrysler built parts as opossed to the mitsubishi built parts, but one thing that you might want to know is that the N/T engine has a really high compression ratio, 10:1 if Im not mistaken, and the turbo engines are built stock with lower compression, 8:1 or something like that. They are made like that to prevent detonation on the turbo charged motors. Really high compression causes alot of heat which can ignite the charged air and gas inside the cylinder. Because the engine uses forced induction, the compression is greatly increased And so is the risk of detonation. Thats why they have lower compression, which means they have lower compression pistons, and probily lower compression heads. In all reality, if you put a turbo charger on your N/T it will deliver far more power than a turbo engine with stock inards. But the only way you can probily safly pull this off is by putting in a top of the line performance intercooler, and you might even want to think about using CO2 or some other kind of coolant to super cool the intercooler. Another choice that might give you some more peace of mind is if they make a waste spark ignition setup for your engine, then you may want to consider one. A waste spark ignition enormously drops cylinder temperatures. But Im not sure if they make them for our cars. All in all, if you can fit 4G63 pistons in a 420A then is would make the turbo a safer modification, but the engine wouldnt be able to produce as much power as it is capable of. On the side of reliability, I have no idea. I honestly prefer haveing a mitsubishi engine over a chrysler engine, but that is just because I have had some bad experiences with chyrsler engines in the past. Does anyone else know how reliable a chyrsler parts and engines are compared to a mitsubishi?

 

[Wilsonman02]

So you wanna put NT pistons into a Turbo block, is that what you're saying? i'm sorta lost in what you wanted to know.

 

[DarkendSoul]

I think he wanted to put 4G63 pistons in a N/T.

 

[bambam]

I wanted to put pistons from a 91 gsx block into my 90 n/t laser engine. from my understanding the only differences on the two are the pistons and the head.(turbo head has beefier cams) which i am swapping also. this is a mitsu engine so I dont think I will have any chrysler issues. and dont quote me but I think most of the compression is built by the N/T pistons so swapping them should solve this is there any other differences?

 

[98eclipseRS]

yes you can swap out the pistons. and everyone please read his post it says he has a 90 n/t so that means it is the 4g63 n/t. not the 420A pos that is in my car.

 

[bambam]

Thanks 98eclipseRS
good news that means this swap wont be as bad as i thought

 

[98eclipseRS]

no prob man i just help where i can. Keep us updated on the swap and tell us how things go too.

 

[supergoat]

How much boost are you planning on? So far mine are taking 7-9psi no problem. No knock or anythig at all. Pulls very strong.

 

[bambam]

with the 16g on my gsx with supporting mods it got up to 24/25 psi. I would hope to use the same setup on this block if it can handle it. I saw all of the threads about keeping the stock pistons from a N/T and keeping the boost down but once you feel that much psi there is no turning back.

 

[wancsta]

I did a conversion a couple of years ago , remember to install the knock sensor when your playin with the block i learned the hard way