T3 on AAZ manifold question - page 2 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• #15 by RabbitJockey on 14 Sep, 2011 08:35
• Quote from: burn_your_money on 14 Sep, 2011 06:58

  Quote from: vanbcguy on 13 Sep, 2011 22:38

  Yeah, you have a choice between sllloooowwww spool up or smoke clouds but once it gets going..........
  
  

  
  You forgot an option - a Giles pump  
  
  Personally I wouldn't run a turbo smaller than a K14. My brothers AAZ had a T3 and it was a nice balance between low boost on the highway (but right there when you needed, possibly with a downshift if you are only doing 80kmh/55mph) and smooth acceleration in lower gears. Giles actually ran a K14, then a T3 then a T3/T4 hybrid and is now back to a K14. I liked the smooth powerband of the T3 and T3/T4 whereas with the K14 you had to be careful in first gear or the boost would come on just off idle and the car would launch forward. The turbo really defines the driving characteristics of the car and it's a matter of how you want to drive.
  
  It depends a lot on the pump as well because I think a K14 without a Giles pump is perfect, but with the Giles pump the T3 or K24 is better
  

  
  thats how i see it, if you're just going to run lower boost and ur not really looking for power at all, small turbos are the way to go. the vw t3 and k24 really aren't that big either, they're a really good balance of spool and power for a fun daily driver.
• #16 by chrisg on 14 Sep, 2011 09:50
• Now how much boost can these engines take? I was planning on running 30 psi on my 1.6 with that pressure would the t3 be better?
• #17 by nathan_b on 14 Sep, 2011 10:04
• turbos can only flow so much,   a lot of times you will get more power with less boost.
  
  If you really want huge psi, you need compound turbos.
• #18 by R.O.R-2.0 on 14 Sep, 2011 12:07
• Quote from: nathan_b on 14 Sep, 2011 10:04

  turbos can only flow so much,   a lot of times you will get more power with less boost.
  
  If you really want huge psi, you need compound turbos.
  

  
  x2...
  
  not many turbos out there that are very efficient at 30 psi..
• #19 by nathan_b on 14 Sep, 2011 13:51
• Quote from: R.O.R-2.0 on 14 Sep, 2011 12:07

  Quote from: nathan_b on 14 Sep, 2011 10:04

  turbos can only flow so much,   a lot of times you will get more power with less boost.
  
  If you really want huge psi, you need compound turbos.
  

  
  x2...
  
  not many turbos out there that are very efficient at 30 psi..
  

  
  did you ever see the solid lifter ALH tdi on tdi club, running a cummins 4bt pump and 75psi. compound turbo. Dyno'ed at 450whp IRCC
• #20 by R.O.R-2.0 on 14 Sep, 2011 13:57
• Quote from: nathan_b on 14 Sep, 2011 13:51

  Quote from: R.O.R-2.0 on 14 Sep, 2011 12:07

  Quote from: nathan_b on 14 Sep, 2011 10:04

  turbos can only flow so much,   a lot of times you will get more power with less boost.
  
  If you really want huge psi, you need compound turbos.
  

  
  x2...
  
  not many turbos out there that are very efficient at 30 psi..
  

  
  did you ever see the solid lifter ALH tdi on tdi club, running a cummins 4bt pump and 75psi. compound turbo. Dyno'ed at 450whp IRCC
  

  
  was it Andy2's car? mk3 golf drag car?
  
  i know andy2 has a cast iron headed alh with compounds and a 4 BTA pump..
  
  a regular old 4BT pump isnt much different from our bosch VE..
  
  the 4BTA got a bosch inline P7100 pump, and thats whats on andy2's car..
  
  if its an engine from a different owner, then i want some links to the topic please?
• #21 by chrisg on 15 Sep, 2011 09:55
• so whats the best option?
  
  just the stock k03 with the wastegate actuator topped out?
  
  i might rig up a drain line and try both and see whats up. i feel like i'd rather the boost be at higher rpm. that way i'm not always in boost in the city. i don't need all my boost driving down side streets, i'd rather open it up and feel the boost at the top end. with the governer mod and the T3 it seems that would work well. that way i get the boost when i need it... like opening it up getting on an on ramp for a high way. or top end of 4th gear.
  
  if this is what i'm after would the T3 be a better option than the k03?
• #22 by burn_your_money on 15 Sep, 2011 13:08
• Have you in fact confirmed that you have a K03? If you do, it's not as easy as just fabbing the return line, you need to change exhaust manifolds, downpipes, charge hoses and intake boots. Plus the intake manifold will need some mild grinding to get the turbo to fit.
  
  From the sounds of it you want to run under 15psi right? If so, go with the K14.
• #23 by vanbcguy on 15 Sep, 2011 19:16
• Quote from: burn_your_money on 15 Sep, 2011 13:08

  From the sounds of it you want to run under 15psi right? If so, go with the K14.
  

  
  ^^^^^^  Do that...
  
  I'm towing a trailer on Jezzie right now with her K24.  Getting the car moving on a hill takes a millenia and leaves a good smoke cloud.  Smaller turbo would be waaaaay better.  The only reason to go for the T3/K24 is that you are planning on running 20+ PSI.
• #24 by R.O.R-2.0 on 16 Sep, 2011 08:57
• Quote from: vanbcguy on 15 Sep, 2011 19:16

  Quote from: burn_your_money on 15 Sep, 2011 13:08

  From the sounds of it you want to run under 15psi right? If so, go with the K14.
  

  
  ^^^^^^  Do that...
  
  I'm towing a trailer on Jezzie right now with her K24.  Getting the car moving on a hill takes a millenia and leaves a good smoke cloud.  Smaller turbo would be waaaaay better.  The only reason to go for the T3/K24 is that you are planning on running 20+ PSI.
  

  
  yes, EXACTLY!
  
  i have a small, VNT15 turbo on my car, and i love it. boosts low, and pulls high..