the ALH should go better because of the VNT.. the powerband is much nicer with the VNT.
Odd question, I know, but I'm very curious to know what a good 500lbs less that the 98 ahu jetta is carrying around can do when compared to the same motor with the same power in a car 500lbs, give or take, heavier. Any experience or input?
I know that every hundred lbs is equivalent to 10hp, or .10 of a second in a drag race. Using that basis, it seems that stock vs stock the older mkIII jetta should eat up the heavier mkiv jetta.
Opinions and input?
Last edited by 85_305; 04-03-2012 at 03:58 PM.
i would rip the AHU out of the mk3, find a REALLY CLEAN mk2 GTI, or Jetta Coupe, and put a mechanical pump (or a full electronic swap if its a CE2 car) on the engine, a big turbo, and call it good..
then it will be FAST, and handle BETTER THAN the mk3 or bloated mk4..
plus, you can do nose wheelies with good brakes on a mk2..
Great car, and reliable too, with almost all oem parts! Still uses mk2 cluster and full votex/recarro trophy interior. Nice ride to say the least.
k03 makes boost rapidly, so it keeps egts pretty low actually, but it is a restriction.
What I find, is that egt goes up with a laggy turbo, k24 runs higher egt than k14 for exaple, with both maxed out.
the ahu/k03 in the coupe would be around 475f (egt) on the highway at 60, but was running max boost or damn near
max egt with stock tune was closer to 900f, but tdis run a lot cooler.
i would not even attempt to tune for much more power until you get a BETTER turbo..
please keep the VNT on the ALH tho.. the VNT will be GAY on the AHU with no way to control it..
if your gonna do something like that, buy a K24 or T3 turbo off a 1.6TD, and strap that on..
THAT K03 IS JUST A BAD RESTRICTION ABOVE 3500 RPMs OR SO. restrictions are not good for power..
that turbo is just too small for performance.. sure, its an insta-spooler, but it runs out of breath WAY BEFORE the engine does..
if you run that K03 @ 18psi, it wont last long at all! promise..
find yourself a K24/T3 and manifold, swap it on, and be done.. then it will RAIL, and you wont have to worry about your turbo exploding..