Max boost 13g

[wsb840]

I have a 97 gst 5 speed with a td04 13g what is the max boost I can run without causing damage to the turbo.

 

[constant_proj21]

I'm sorry, but if you're asking this, don't touch the boost. You need supporting mods to SUPPORT more boost. A 13g is no powerhouse, if you're gonna be turning the boost up, get a 16g or at least a 14b to start messing with. More boost, means youre gonna need more fuel, gonna need to tune it somehow, and then you can safely run whatever boost ya want. I can only imagine a 13g will get to 15-20psi.

 

[TSi Kid]

Tech Guide: 1G 4G63t Upgrades - DSMtuners
don't touch your boost before you start to learn more about your car
you have alot more mods you should be doing before you mess with more boost

 

[wsb840]

I'm not turning the boost up yet I just had a mbc laying around so I hooked it up. I'm looking for maybe around 250 whp is that possible with the 13g?

 

[habitatguy187]

13g's are really only good for about 14psi with everything else stock.



EDIT: And yes 250whp is possible but it'd really be pushing it. You'd need a lot of supporting mods to get that out of the turbo, at least race gas or e85 and a fmic.

 

[wsb840]

I still have the stock turbo would I be better of putting it on? I had to replace the motor and left the turbo that came with the jdm engine on not knowing it was different

 

[habitatguy187]

Actually the 13g flows a little more air than the t25. I'm wondering though did you use the stock 2g exhaust manifold or the one that came off the jdm engine? If you're using a 2g manifold and the 13g then you're creating a bottleneck in your exhaust system. Basically the 2g manifold outlet is nearly twice the diameter of the 13g inlet, so that's something you don't want to do.

Either way I would find it extremely hard to push the 13g to what it's rated to flow, and I would BET that it would be easier to make power with the t25, due to the extreme exhaust restriction of the 13g and it's matching exhaust manifold. Either way it's your call. Since you already have the 2g exhaust manifold, 13g oil and coolant lines, j-pipe and intercooler pipe for the 13g your best bet is to find a used 14b for around $100 and swap that in it's place. You'll make much more power than either the t25 and 13g much easier and cheaper than if you were to try and run those turbos.

 

[wsb840]

I'm using the exhaust manifold that came with the jdm engine. If I got a 14b what exhaust manifold should I use

 

[toofast82]

I'm using the exhaust manifold that came with the jdm engine. If I got a 14b what exhaust manifold should I use

Your original 2g manifold will fit the 14b, because the 14b and T25 are both 6cm inlets

 

[wsb840]

Thanks for the help