34 Na Turbo Bolt On Need Advice.

[Sk8n6]

Hi all I'm new here I have a 34 skyline it's an na I have a stock gtr motor for it (turbo) but I don't want to put that in yet I wanted to rebuild it an do a lil work to it. I got the car with the motor as a spare but the turbo has been takin on it an put on the na motor it runs around 5psi boost what could I do to this na motor to run a bit more boost with out spending heaps on it as I am building the other motor I just want that bit more punch thanks guys for ur help

[Bennis]

Umm....

1. 'GTR' Motors are rb26dett and such are factory twin turbo. So ide say with 99% assurance you dont have an rb26 with you if you only have a single turbo on your rb25de. Post some pictures of the spare engine you have and of the turbo that was put on your motor so we can identify what we are working with.

2. Get a cheap manual boost controller if you want to up the boost a bit. Without knowing what turbo you have ide say stick to aroudn 7-9 psi. You may need a retune. Surely there has been more done to this car because you cant just smack a turbo on and nothing else.

Moar info needed + pics help

[Sk8n6]

Thank u it has a turbo smart boost tee on it I figured out today that the hoses where the wrong way around I'm now on 8psi and my spare engine is a neo if that helps that's all I know it's all pulled down but I do know its defs not twin turbo haha I think the turbos just a stock Nissan or nismo or something I have seen it on it somewhere Ill have to have a look again and I will take a few pics as well thank u for ur help

[poeticjustice88]

If you have simply thrown a turbo exhaust manifold and turbo onto a STOCK N/A motor, I would strongly suggest removing the boost controller all together. The ecu will not have a single idea what is happening when you see boost. (if it i an N/A ecu, if not that's good) Also, if it is just an N/A motor that you, or someone has strapped a turbo onto, the compression of the cylinders will be way too high to safely see ANY boost. Since day 1, people have said you can "safely" put a turbo on an N/A engine and run <5 PSI of boost and it will be okay. In "some" cases this may be truth, however it is putting an extremely high amount of stress on the non turbo engine and in 9/10 cases will end with a bang, and not from your tires.

So as far as you wanting to get more boost. I would strongly suggest removing what boost you already have. If you are dead set on continuing with the turbo on the N/A engine, then I highly suggest you get a decompression head gasket, shorter stroke pistons, dish top pistons or all of the above to lower the compression enough to SAFELY have some boost put through it.

If you don't lower the compression, you will have two engines sitting in your garage needing a rebuild. As well as no car.

Michael

[Seano350GT]

don't understand why you'd want to turbo the 25de.