Using a T20 turbo (200sx/silvia) turbo in a N/a - t conversion

[Guest andy thomas]

Hi everyone, i have a t20 turbo laying around from a 200sx and was wondering, if i did want to go ahead with a na-t conversation would it be worth using that turbo, how much hp will i make off 11psi with an air intake system, what are common issuses, will my gear box withstand the power and is a turbo kit a better option or is buying a stock twin turbo supra in about a years time a better idea. Thanks in advance will be checking this thread daily and sorry if most of these questions have been asked before.

[mellonman]

Surely to get it to fit would cause for alot of fabrication to fit an old tec turbo,

Also what gearbox do you have?

I would get a decent kit thats known to fit and proven numbers , this would save you alot of problems later

[Si_s Supe]

Correct me if I'm wrong, but isn't the T20 a tiny turbo from the CA18-DET?? Commonly upgraded to the bigger T25 from the SR20-DET. Both stock turbos from 1800/2000 4 pots. Can't imagine they'd be very impressive bolted up to a 3000 6 pot bud.

 

As said above, I'd save your money and time and use a decent kit if you'd like to take that route.

[Tricky-Ricky]

Pointless! it would all be over by 3-4K RPM and then it would be out of its efficiency range and just pumping in overheated air.

[Guest andy thomas]

yeah my bad got confused its a T25 and decided that due to fabrication and kms on that turbo that it would just be way easier to buy a kit from suprastore.com

[Tricky-Ricky]

Anything smaller than a GT35 is a bit of a waste on a 3l engine...unless its a diesel.

[Chris Bailey]

T61 is ideal for NA-T

[jumpbike]

just for reference as im a 200sx owner, T25 or T2 is the flange type, standard size, 1 smaller than a T3. CA18's came with GT25 garrets and the SR20's came with GT28. The 28 can do up to about 300hp on the 2 litre but I think on a 3 litre it will just cause a restriction and probably end up with boost creep at higher RPM. Would spool instantly though!

[Pipedreams]

It's the opposite actually. At high rpms the compressor can't keep up with the flow demand of the engine so it won't be able to hold boost. An n/a-t 2jz would need ~5psi to reach 300hp and if that is the hp-limit of the compressor, that's the boost it can hold.