a cobalt could spool one just fine on 10:1 compression

 

I keep getting mixed opinions about this, some say it won't work others say it will be animal

 

if u have the money to try it and possibly be disappointed then do it, if u want a fast car and not have to worry about possibly just "wasting" money buy a s256 or 252 and call it a day.

 

Lnf is either 9:5:1 or 9:2:1 cant remember

 

u could still spool it just a little higher would be better. i spool one just fine on my 2.0 liter

 

If it is a 60mm compressor wheel have a good time getting it to hit full boost by 4000 rpms. My 58mm is dbb and a billet wheel with a .63 ar turbine housing and cant do that in 4th gear. Its about 41-4200 rpm.

 

Yeah with head ports 3 times the size of ours and another 2000 rpms

 

Hmm

 

port and polish haha it helps a **** ton. i couldnt believe when i had my cobalt head done how much was taken out

 

Honestly its all in the tune. 2.0l engines have been spinning bigger turbos then what im building, the garret gt30 is about the same size. Either way I'm still going through with it.

 

Tune has very little to do with physics, its just not possible to spool a turbo that size by the rpm's that you desire. Either way if you're building an engine just make sure the head can spin past 8k rpm and it really shouldn't matter when it spools.

 

I have springs, actually u can get a turbo to spool fast with cam phasing. Vvt is a wonderful thing

 

That was on my previous 4cyl. I was experimenting doing a standalone , big turbo, built engine, custom everything. At the end, it didn't work as I had hoped. Sold the car, wasted a boat load of $ for nothing. All I got was disappointment in the end. Learned my lesson. Now I only buy proven/tested performance parts and work done by reputable shops/vendors.

GL...

 

20g I've hit full spool at 3600-3700 on 28lbs, when I changed the housing and changed the wheels to the td07sh bs It was balanced and etc by a Evo guy and it was good for a year, but it had surge because it didn't have a surge protectant housing. But it's full spool was 4300-4400 on average.. It flowed great but it wasn't worth the 800+ $ to do it...