NatesGr8 Posted August 21, 2009 Share Posted August 21, 2009 As the title states, i'm swapping out my blown VF40 (yup its the second one) with a vf46. does anyone out there know if i will need to retune for this turbo? I'm currently running a pdx etune for stage 2. I'll end up giving them a call or email to see what they think as well. Thanks for the input. Nate Link to comment Share on other sites More sharing options...
testes1010 Posted August 21, 2009 Share Posted August 21, 2009 Unless the Wastegate actuator is sprung different, no. Link to comment Share on other sites More sharing options...
whitetiger Posted August 21, 2009 Share Posted August 21, 2009 use the vf40 restrictor pill, and no tune is required. Link to comment Share on other sites More sharing options...
NatesGr8 Posted August 21, 2009 Author Share Posted August 21, 2009 okay, so i could just swap out the the vacuum lines from the old turbo onto the new one and that should do it? Link to comment Share on other sites More sharing options...
BLKGT5 Posted August 21, 2009 Share Posted August 21, 2009 What size is the vf40 restrictor pill? Link to comment Share on other sites More sharing options...
NatesGr8 Posted August 21, 2009 Author Share Posted August 21, 2009 not sure on pill size, i'll have to check those out tonight. but i think i'm gonna go with what white tiger said and just swap them, unless of course they're already the same. some other useful info. i'm running a fully catless exhaust with the invidia divorced dp. Link to comment Share on other sites More sharing options...
BLKGT5 Posted August 21, 2009 Share Posted August 21, 2009 I guess the stock pill size should be around 1.25mm or .049" Link to comment Share on other sites More sharing options...
whitetiger Posted August 21, 2009 Share Posted August 21, 2009 not sure on pill size, i'll have to check those out tonight. but i think i'm gonna go with what white tiger said and just swap them, unless of course they're already the same. some other useful info. i'm running a fully catless exhaust with the invidia divorced dp. they are not the same. i made this swap already. trust me, you want the 40 pill in there if you are not getting a re-tune. Link to comment Share on other sites More sharing options...
NatesGr8 Posted August 21, 2009 Author Share Posted August 21, 2009 Okay I will get that swapped over. Thanks for the info. Since you've already done this is there a noticeable differance between the two turbos? Link to comment Share on other sites More sharing options...
NatesGr8 Posted August 22, 2009 Author Share Posted August 22, 2009 Pill is on the turbo side of the T connector right? Link to comment Share on other sites More sharing options...
black318i Posted August 22, 2009 Share Posted August 22, 2009 I read you should swap the pill and actuator. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted August 22, 2009 Share Posted August 22, 2009 The VF46 actuator is approximately 8 psi and the VF40 actuator is approximately 10 psi. You can run it safely by just swapping the pill out. The problem is that there will be a slight loss in performance. Unfortunately, the VF40 and VF46 actuator are not a straight swap so it's not easy to swap them out. The tuner can easily adjust the tune for the lower spring rate of the actuator. Link to comment Share on other sites More sharing options...
NatesGr8 Posted August 23, 2009 Author Share Posted August 23, 2009 use the vf40 restrictor pill, and no tune is required. The vf40 pill should be larger than the vf46 correct? Also it goes onthe turbo side of the T connector? This is how I have it set up now. Hopefully I'll be taking her for a spin tomorrow! Link to comment Share on other sites More sharing options...
NatesGr8 Posted August 24, 2009 Author Share Posted August 24, 2009 soo, got a little delayed with the install. Turbo's in, just gotta get the inlet hose clamp tightened, downpipe and ic back on. Whitetiger, see my question above. Thanks, Nate Link to comment Share on other sites More sharing options...
whitetiger Posted August 24, 2009 Share Posted August 24, 2009 The vf40 pill should be larger than the vf46 correct? Also it goes onthe turbo side of the T connector? This is how I have it set up now. Hopefully I'll be taking her for a spin tomorrow! sounds right. Link to comment Share on other sites More sharing options...
dwolson2 Posted August 26, 2009 Share Posted August 26, 2009 I would still tune, go with open source, its cheap! Plus any mod I would want to make sure everything is exactly the way it should be Link to comment Share on other sites More sharing options...
0verboost Posted August 31, 2009 Share Posted August 31, 2009 Can you make more power with the vf46? Link to comment Share on other sites More sharing options...
NatesGr8 Posted August 31, 2009 Author Share Posted August 31, 2009 I would still tune, go with open source, its cheap! Plus any mod I would want to make sure everything is exactly the way it should be yes i will eventually get a tune, i just wanted to be sure this will be safe in the meantime as i need a daily driver and won't have time...or money to get to the dyno for a month or two. Link to comment Share on other sites More sharing options...
dwolson2 Posted September 1, 2009 Share Posted September 1, 2009 yes i will eventually get a tune, i just wanted to be sure this will be safe in the meantime as i need a daily driver and won't have time...or money to get to the dyno for a month or two. cost me $26. Free software, and as for dyno, just found an open straight road with almost no traffic. All I need is about 1 mile straight, 2 is better. It depends on which model year you have. 05-06 can get by with the 26 vag com cable(says Audi on ebay, obd2 to usb) but the 07 need the tactrix cable. after going opensource Its hard to imagine not doing it. even as a stock car I would recomend it. get with a guy named mickeyd or infamous1. both are excellent tuners. infamous has a service that he will write a map specifically for your car. I think he does like 6 rewrites on the map. Link to comment Share on other sites More sharing options...
NatesGr8 Posted September 2, 2009 Author Share Posted September 2, 2009 yeah, i know i could try and do the tuning myself, however i don't think i'd find the time to try and figure it all out. It is a good option though. But right now, i'd rather just pay for it. On another note, the turbo is in and seems to be running good. Might not be making as much boost as the old turbo. I'll do some AP datalogging to compare things from before. Link to comment Share on other sites More sharing options...
E-Tank Posted October 23, 2009 Share Posted October 23, 2009 Sorry to wake the dead, but what was the outcome? Did you end up with any gains from the switch? Link to comment Share on other sites More sharing options...
black318i Posted October 24, 2009 Share Posted October 24, 2009 The VF46 actuator is approximately 8 psi and the VF40 actuator is approximately 10 psi. You can run it safely by just swapping the pill out. The problem is that there will be a slight loss in performance. Unfortunately, the VF40 and VF46 actuator are not a straight swap so it's not easy to swap them out. The tuner can easily adjust the tune for the lower spring rate of the actuator. Any advantage or disadvantage between the 8# and 10# actuator? Either way I will be using a 1mm pill. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted October 24, 2009 Share Posted October 24, 2009 I think the lightest actuator needed to do the job should be used. The 8 lb actuator with a 1mm pill works just fine for the VF46. The lighter actuator gives you a better fail safety if IAM drops. Link to comment Share on other sites More sharing options...
CapeStylz Posted November 1, 2009 Share Posted November 1, 2009 Is the swap really worth it what kind of power are you makeing and at what boost Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.