Big T28 Killer???

[Brad_95_GSX]

I have a 1995 GSX, I have a K&N filter charger, 2.25" exhaust from behind the downpipe straight to the muffler, and an ACT 2600 clutch. Everything else is stock, performance wise. The engine was rebuilt this past winter. My stock turbo is going bad, it is burning oil, and it has a lot of shaft play. I want to try and baby it till winter, then send it in to get the big t28 killer upgrade. With this upgrade what will i need to do to make sure that it doesn't hurt the engine. Also will i need to port the stock manifold, if so does anyone know of a good import performance place in northern Michigan? Also, my clutch chatters a lot, could this be because the shop that put it in didn't bother to have the flywheel reground? Thanks for the help.

 

[GPTourer]

You are in a tough spot. This question gets tossed around a lot and the answer is always the same. You'll just have to limp around on low boost until you get your fuel system up to spec before you can take advantage of the killer (which I assume is supposed to flow at B16G levels) If you don't clutch chatter will be the least of your problems. MBC, fuel pump, injectors (and some way to control them) THEN the turbo.

 

[tigerstalon]

I wouldn't call it limping around on low boost. You should simply be able to swap in the new turbo and keep the car at stock boost levels (12psi or so), unless the turbo has a 17psi wastegate actuator (which would force you to run boost at 17psi or higher). To be safe, you should get a boost gauge and manual boost controller if you don't already have them so you can keep an eye on and control the boost. Many people have bought the T28 early because the T25 crapped out before they could get the rest of the upgrades, and they've been fine.

 

[GPTourer]

But he's not talking about a t-28. He's getting a big t-28 KILLER. They are two different things.

 

[pneumo]

But he's not talking about a t-28. He's getting a big t-28 KILLER. They are two different things.

the turbos are different, but the advice remains the same. Keep it at stock boost levels and you'll be fine.

 

[GPTourer]

I guess "low boost" is just a subjective term then, I don't see what the difference is. 12 psi, is low to me, and the guy said he didn't have any other mods like a MBC or fuel control. When I had my t-25 and no MBC, it would hit 16psi at times when I had similar mods to his. Swapping in a killer and having it go up to 16psi with no other changes could have caused problems for me. EDIT: All I'm saying is, he'd need a MBC to limp around on low boost, before he could take advantage of it.

 

[MattnGsx]

I have a 1995 GSX, I have a K&N filter charger, 2.25" exhaust from behind the downpipe straight to the muffler, and an ACT 2600 clutch. Everything else is stock, performance wise. The engine was rebuilt this past winter. My stock turbo is going bad, it is burning oil, and it has a lot of shaft play. I want to try and baby it till winter, then send it in to get the big t28 killer upgrade. With this upgrade what will i need to do to make sure that it doesn't hurt the engine. Also will i need to port the stock manifold, if so does anyone know of a good import performance place in northern Michigan? Also, my clutch chatters a lot, could this be because the shop that put it in didn't bother to have the flywheel reground? Thanks for the help.

I ran stock minus uicp exhaust and airfilter for a month at 15psi, with no problems.

In my opinion just order the turbo and forget about the core charge, if there is any little crack or anything they'll tell you (turbochargers.com) that your cores no good (then you wasted 30 bucks on shipping you turbo) and then you have down time :thumbdown

No you don't realy need to port the manifold.

your clutch could chatter becuase its not alighned right, flywheel, or its the wrong clutch?

 

[tigerstalon]

All I'm saying is, he'd need a MBC to limp around on low boost, before he could take advantage of it.

Technically, he doesn't need a MBC at all to limp around on the lowest boost possible. You can't run boost lower than the rate of the wastegate actuator. If it is a 12psi actuator, you must run 12 or higher. If you momentarily see 16psi, that's most likely just boost spike, probably because the wastegate can't open fast enough to keep it from spiking. I imagine the T28 killer is equipped with a 12psi actuator or something similar. You could call/email them and find out to be sure.

Boost controllers are much like the B&M Fuel Pressure Modifier--they can only raise the parameter that they modify.

 

[GPTourer]

I imagine the T28 killer is equipped with a 12psi actuator or something similar. You could call/email them and find out to be sure.

Well then that's the 64,000 question, isn't it? Why imagine anything when his motor may be at stake? Why chance it at all when you can get a MBC for like $30-$100 bucks and a boost gauge for $50?

 

[tigerstalon]

Well then that's the 64,000 question, isn't it? Why imagine anything when his motor may be at stake? Why chance it at all when you can get a MBC for like $30-$100 bucks and a boost gauge for $50?

Agreed. That's why I suggested calling/emailing to find out what it is set at. Additionally, if it is too high, there's no way to lower it with a MBC, in which case you would need to get an air/fuel computer (S-AFC, etc.) and maybe larger injectors to tune for the increased airflow.

 

[MattnGsx]

Agreed. That's why I suggested calling/emailing to find out what it is set at. Additionally, if it is too high, there's no way to lower it with a MBC, in which case you would need to get an air/fuel computer (S-AFC, etc.) and maybe larger injectors to tune for the increased airflow.

whos he ordering it from, the only company i know that make the real t-28 killer is turbochargers.com? If hes ordering from them, the actuator is set to 10psi, the same as the stock t-25.

-Matt