[rival501]

is that ok if i use stock turbo then upgrade my intercooler. the boost up to 1.2 bar, is that ok? engine rb25det standard.

 

[240rb]

I wouldn't go over 12 psi on stock motor.

 

[Gruppe-S1]

is that ok if i use stock turbo then upgrade my intercooler. the boost up to 1.2 bar, is that ok? engine rb25det standard.

>Good< gas you'll be fine.

 

[240rb]

good gas will help, but the stock turbo on an r33 gts-t will blow after .80 bar its happened to many people running the stock turbo running just .85 bar. If you run anything above .80 you're just asking to end the life of your turbo very quickly.

 

[Gruppe-S1]

good gas will help, but the stock turbo on an r33 gts-t will blow after .80 bar its happened to many people running the stock turbo running just .85 bar. If you run anything above .80 you're just asking to end the life of your turbo very quickly.

I think the primary cause of failure is not the turbo itself but the inability for the turbo to handle high EGTs due to the ceramic BB cartridge. Usually bumping up the boost results in the stock ECU (or one with a piggy back) substantially increase fuel trim or lean out which results in high EGTs. With high octane gas (especially leaded), and some careful tuning, higher boost pressures can be run without causing turbo failure, and I've seen it done - my old partner in Japan ran 1-1.25 on a regular basis with good gas. That said, yes, usually it's a bad idea to break 1 bar with the GTS unless you know what you're doing.

Cheers,

Gary
Gruppe-S

 

[240rb]

Yeah, thats true, i see your point and agree 100%.

On a side note, i used to buy stuff from you guys at Gruppe-S when i had my 02 WRX, you guys are by far one of the best companies i have ever dealt with. I just wish you guys carried 240 and/or skyline parts. :brow:

 

[Gruppe-S1]

Yeah, thats true, i see your point and agree 100%.

On a side note, i used to buy stuff from you guys at Gruppe-S when i had my 02 WRX, you guys are by far one of the best companies i have ever dealt with. I just wish you guys carried 240 and/or skyline parts. :brow:

Thanks

If you need anything special order from Japan just let me know - I can order it for you. The exchange rate is great right now, and I've ordered tons of skyline stuff from Japan for my buddies and myself (I kept blowing up my motor haha).

Cheers,

Gary
[email protected]

 

[240rb]

AWESOME!!! I may be giving you a call here pretty soon then!!!

 

[rival501]

thank you for your advise guys... so i will keep my boost to 1.0 (average) stock ECU, stock fuel injector ande stock rb25det. actually im more worried that setting my boost high will blow my engine not the turbo. thanks again

 

[daddysan]

I have a 93 Skyline R33 GTS-T and I run 1.5 Bars off the Stock Turbo. I've been doing it for a little while now with no problems with the turbo. The only problem was that the EGT was getting too hot and my ECU was pulling fuel. It was fixed with a FM Intercooler and Boost Cooler. Now I run 1.5 bars with no problem, with an ocassional 1.6-1.8 spike.

 

[Last Samurai]

I personally drove my 1995 GTS25t at 1.5 bar from June of 2006 until I upgraded to a T04e last summer... When I took the stock turbo off it was still in great condition... So I gave it to a friend that was trying to turbo a RB20 and it worked great for him!

As soon as I upgraded the turbo I did the head gasket (1.2mm Metal GReddy) and timing belt (GReddy) and I have had no problems! Still running at 1.5 bar!