So I finally blew up my E .57-trim. I loved this turbo, but I am considering moving up to a GT3076.

What I want to know is if I will sacrifice ANY spool RPM? On my 84.5mm B18C I reach 15psi by ~3500-3600RPM. I loooooove this. It is most important to me to have boost at those early RPM.

So will the GT3076 spool as fast or at least really, really close to a .57-trim with Stage3/.63?

 

It will spool faster and make more power, I've seen it time and time again.

 

3076 will eat the 57 trim in terms of response.

 

This is good to know.

I was looking at some dyno sheets and it looked like the GT3076 didn't really come up until 4-5K RPM. It was worrying me.

 

Sounds like to me that you love your 57 trim so I say rebuild it.............. The GT3076 will make more power since you have a 84.5 bore and you are running E85 but I think the spool that you are looking for will be alittle bit later like somewhere around 4.5k. SO once again I say rebuild it.....

 

Ah ok so you are saying the GT3076 does NOT spool as fast (early) as a .57 trim?

 

this is a 1.8liter gsr. the dotted line is a GT30r, and the solid line was the old 57 trim setup that he upgraded from. as you can see it spooled up faster, and power held out better up top. same boost level on both.

 

Sorry but I dont buy it. A 3076r will not have 15psi at 3500rpm

 

I have a .57 with no shaft play in perfect condition for sale if your interested. PM me I went with a 6262 and really liked my .57 on the street much better as well