Turbo flow comparison GT35r , T04z, GT30r

**jdm93** · 14-10-2010, 10:36 PM

In choosing the turbo I'd consider for my 1jz (single turbo + vvti), been doing some research.

Wanted to get some feedback whether I'm reading into this correctly- like the to4z shows 30 lb/min @ 70% efficiency and gt30r 1.06 shows 26 lb/min @ 72% - I understand what you've mentioned, but looking at those figures I cant help but wonder wouldn't they more or less be same in response / drive ?

Mind you I haven't been in cares with any of these turbos, purely going by these plots (so easy on the flaming

) -

advice?

Cheers

**jdm93** · 15-10-2010, 07:33 PM

sorry did I ask something 'that' silly or /???

**Norbie** · 15-10-2010, 08:47 PM

Not silly, but it's not very clear what you're trying to ask?

**oldcorollas** · 15-10-2010, 10:05 PM

Originally Posted by jdm93

In choosing the turbo I'd consider for my 1jz (single turbo + vvti), been doing some research.

Wanted to get some feedback whether I'm reading into this correctly- like the to4z shows 30 lb/min @ 70% efficiency and gt30r 1.06 shows 26 lb/min @ 72% - I understand what you've mentioned, but looking at those figures I cant help but wonder wouldn't they more or less be same in response / drive ?

the plots just show you maximum airflow at that efficiency, at a given pressure ratio.
doesn't really show you anything abotu the efficiency at other pressure ratios/airflow (ie you need the proper compressor maps)
neither will show you spool time, which will affect the driveability

**jdm93** · 15-10-2010, 10:15 PM

Originally Posted by oldcorollas

the plots just show you maximum airflow at that efficiency, at a given pressure ratio.
doesn't really show you anything abotu the efficiency at other pressure ratios/airflow (ie you need the proper compressor maps)
neither will show you spool time, which will affect the driveability

that !! - hmmm so with that in mind something like this on a 1j would be lag ++ ??