which turbo spools quicker? apr stage 3 or pes
![Phishie [K04]'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%237c5e49' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>P</text></svg>)
![Phishie [K04] is offline](https://www.audiworld.com/forums/images/audiworld/statusicon/user_offline.gif)
09-08-2002, 08:46 PM
#2
Senior Member
Join Date: Mar 2000
Posts: 7,227
Likes: 0
Received 0 Likes
on
0 Posts
GENERALLY speaking, the apr......
its a smaller, ball-bearing Garrett GT-25 turbo, as opposed to the PES's larger T-28 turbo. obviously, there are alot of factors that determine spool up time, but in most cases, the apr will spool up quicker.
09-08-2002, 09:02 PM
#4
Senior Member
Join Date: Mar 2000
Posts: 7,227
Likes: 0
Received 0 Likes
on
0 Posts
no, not really.......
the apr will spool up quicker, but power is totally dependent on application. in general, the T-28 being a larger turbo capable of higher boost, there is POTENTIAL for more power with the right tuning. out of the box, i believe both kits claim about 290 hp. it just depends on your preference.
![dr.audios[the OG]'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%23918e59' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>d</text></svg>)
09-08-2002, 09:04 PM
#6
Member
Join Date: May 2001
Posts: 17,322
Likes: 0
Received 0 Likes
on
0 Posts
Neither 'delivers more power'. Both will flow enough air within their efficiency range to make more
power, respectively, than either the PES or APR kits are 'tuned' to deliver. The T28, being larger, will deliver more air (and therefore has a higher max HP rating) at it's maximum than the GT-25. It spools a bit later in the rev band for the same reason .. it is larger and takes more exhaust flow to spool up.
Trending Topics
09-08-2002, 09:23 PM
#8
AudiWorld Super User
Join Date: Sep 2001
Posts: 3,175
Likes: 0
Received 0 Likes
on
0 Posts
even another question - are the APR and PES hp figures conservative?
I have heard people say that the s3 kit on 103 gas pumps out 320hp. Another reason i ask is, why is the PES kit rated at 270hp when the APR kit is 280hp? Why isnt the t-28 tweeked a bit more to at least be put on the same power level as the s3 kit?
![[ej257]'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%23c5773e' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>[</text></svg>)
09-08-2002, 09:41 PM
#10
Member
Join Date: May 2001
Posts: 17,322
Likes: 0
Received 0 Likes
on
0 Posts
Diff in exhaust flow. The 'base' PES kit doesn't include a high flow cat and the APR kit does. If
you add a high flow cat to the PES kit you'll get more HP. The 270 was supposedly from a dyno run with the OEM cat. Dunno if adding a high flow cat would close the ~30 lb-ft of torque diff or if that is 'tuning' preferences between APR and GIAC.