Nissan 370Z Forum - View Single Post

gbrettin · 01-02-2019, 01:57 AM

In this section... I'll lead off with this, because it's relevant. I've decided to go for an LS swap on my Z. Donor engine acquired! Aluminum block 5.3

The engine is pretty much trash so I need to break it down so that it can be sent out to the machine shop.

It's Time to send the block out for machining now that the block has been broke down.

Cylinders had pitting and were out of round; however, machine work made everything better than new.

A 4.8 crank was located because the goal is to destroke the 5.3. Keep in mind that the crank is the determining factor between a 5.3 and the 4.8. The block was punched out a bit so the ending displacement is more like a 5.0. Now you might be asking yourself, "why the destroke???". Well, I have two reasons. 1.) The destroke should make for a high reving engine. 2.) The 4.8 is strong. Very strong, as in hold 1500whp strong.

Another reason why I had to put a 4.8 crank in the block is because GM never made an aluminum block (LC9 code) with a 4.8 crank.

01-02-2019, 01:57 AM	#3 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,284 Drives: Tricycle Rep Power: 589151	In this section... I'll lead off with this, because it's relevant. I've decided to go for an LS swap on my Z. Donor engine acquired! Aluminum block 5.3 The engine is pretty much trash so I need to break it down so that it can be sent out to the machine shop. It's Time to send the block out for machining now that the block has been broke down. Cylinders had pitting and were out of round; however, machine work made everything better than new. A 4.8 crank was located because the goal is to destroke the 5.3. Keep in mind that the crank is the determining factor between a 5.3 and the 4.8. The block was punched out a bit so the ending displacement is more like a 5.0. Now you might be asking yourself, "why the destroke???". Well, I have two reasons. 1.) The destroke should make for a high reving engine. 2.) The 4.8 is strong. Very strong, as in hold 1500whp strong. Another reason why I had to put a 4.8 crank in the block is because GM never made an aluminum block (LC9 code) with a 4.8 crank. Last edited by gbrettin; 11-24-2021 at 09:29 AM.