How much differance is there in a TD04 Spool up compared to a IHI VF22 Ball bearing turbo?

Thanks

 

The VF22 is reckoned to come on boost about 900rpm higher than a TD04 (circa 3,400rpm v 2,500rpm for a TD04 on a 2.0 dependant on other changes) in tests I have seen, it may be roller bearing, but its also a lot bigger, being the 'biggest' (highest power capability) FHI fitted and having the large P20 turbine housing.

Also as an older design they are not as robust as newer ones and overspeeding (circa 20psi on a 2.0 litre is about the limit) them leads to rapid failures.

Simon

 

Thanks for the reply.
Only reason i ask his its going on a 1.3 lool
My TD04 Spins up at about 3.500 so wanted to know if there was much more lag

 

the vf22 is the most "unreliable" of the vf series turbos. i had one for a while though and had no issues and know a few friends with them who have never had any issues.

though if you can you would be better going for the vf23 which is basially the same turbo without the reliablility issues

 

ok i get what your sayin its only i have the 22 in my hand and wasnt to sure to swap it for the td04

 

I will be swapping my TD04 for a vf23 than came last week, only because the td04 are only good for 275bhp and the VF23 are ok till about 350ish