Engine Swap from 7AGE to 4AGE 20v black top Options

[yagamius]

I'm planing to turbo my 7A engine, but I realize that I can swap that 7AGE to 4AGE 20v Black Top and then turbo it.

so since my Celi have an A engine the swap will be less work than swapping to a 3SGTE engine or the will be a hard swap, also don't know if I can use the same tranny or I need to change it.

a 4AGE 20v Black Top, is much better than my 7AGE, and it looks that just fits into the car, so have any of you do this kind of swap ???

[netrata]

I would highly go with Culpable with that one. The 4agze is the best bet, especially for a turbo with it's 8.9:1 compression ratio. It already is made strong enough for force induction in its stock form. Like the others have said, the blacktop is a no go due to the lighter internals ie: thinner con rods, high comp. pistons, 11:1 compression, etc. As well as the silvertop except it does share the stronger con. rods as the 4agze, the piston alone will not withstand boost due to it's 10.5:1 compression ratio. So the only way to work it out with a the silvertop is to use a set of turbo-application pistons, like the ones from ARIAS, to lower the compression to 8:1 and also a Multi-Layer Steel Headgasket about 1-2mm thick. But do keep in mind that it will be expensive to buy parts for it and keep it maintained for the life of the engine, believe me I know! and since the 4agze is already a beefed up stock 16v 4age, maintenance as well as performance parts are more easier to find and cheaper then the 20v counterparts. You just need to understand that with force induction, you are increasing the compression within the combustion chamber of the engine in a dramatically, so with something that already has high compression pistons and then adding a turbo, you'll do nothing but destroy the pistons or maybe even through the rod through the block.

This post has been edited by netrata: Apr 15, 2009 - 10:11 PM