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Blown oil seals, upgrade to VNT?
by
Fredrikkk
on 28 Nov, 2011 12:57
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Well, the oil seals on my K24 have blown and it's slowly leaking oil into the exhaust. I have been searching for VNT turbos, and I was thinking maybe VNT 17 would be a good size. I'm wondering if I can run that without having to hook up the vane control system to have some sort of nice middle ground. Or how about a VNT 20, how early/late does that spool up to 20 psi?
Thanks!
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#1
by
Swartzvw
on 28 Nov, 2011 15:22
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I have a VNT17 on my rabbit. I played with the vane position lever until I got it to where it maxes out at about 18psi. Boost comes on pretty quickly, obviously not as good as if you had a vane control but I am very happy with it. The more fuel you throw at it, the quicker it will spool and the more boost it will build. Just adjust your fuel/vane position until you are happy. I love my vnt!
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#2
by
R.O.R-2.0
on 28 Nov, 2011 15:35
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I have a VNT17 on my rabbit. I played with the vane position lever until I got it to where it maxes out at about 18psi. Boost comes on pretty quickly, obviously not as good as if you had a vane control but I am very happy with it. The more fuel you throw at it, the quicker it will spool and the more boost it will build. Just adjust your fuel/vane position until you are happy. I love my vnt!
GT1749VNT? (newer VNT15)
or a real VNT17 off a AFN engine?
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#3
by
Alcaid
on 29 Nov, 2011 01:33
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I have a VNT17 on my rabbit. I played with the vane position lever until I got it to where it maxes out at about 18psi. Boost comes on pretty quickly, obviously not as good as if you had a vane control but I am very happy with it. The more fuel you throw at it, the quicker it will spool and the more boost it will build. Just adjust your fuel/vane position until you are happy. I love my vnt!
GT1749VNT? (newer VNT15)
or a real VNT17 off a AFN engine?
The "real" VNT17 as you are referring to is the GT1749VA from the PD130 engines, or even the GT1749VB from the PD150. The AFN has a GT1749V which is way smaller, called the VNT15.
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#4
by
Fredrikkk
on 29 Nov, 2011 04:10
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I have a VNT17 on my rabbit. I played with the vane position lever until I got it to where it maxes out at about 18psi. Boost comes on pretty quickly, obviously not as good as if you had a vane control but I am very happy with it. The more fuel you throw at it, the quicker it will spool and the more boost it will build. Just adjust your fuel/vane position until you are happy. I love my vnt!
Oh that sounds awesome!
And I guess I can get a VNT from a longitudinal engine too right? I have read a little, but as I've understood I can use a longitudinal VNT which won't interfere with the engine mount.
Correct?
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#5
by
RabbitJockey
on 29 Nov, 2011 04:25
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if you're not going to hook up the vanes then why go vnt. theres a zillion small turbos u can get off of other cars, even the k03 off mk3 tdis would be a nice little turbo on a 1.6 and its nearly a direct bolt on.
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#6
by
Fredrikkk
on 29 Nov, 2011 05:06
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if you're not going to hook up the vanes then why go vnt. theres a zillion small turbos u can get off of other cars, even the k03 off mk3 tdis would be a nice little turbo on a 1.6 and its nearly a direct bolt on.
Well honestly, as far as I've understood, you can get a nice balance between fast spool and high boost. With a K14 that doesn't happen, and with a K03 it definitely won't happen.
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#7
by
Alcaid
on 29 Nov, 2011 06:12
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If you are not going to control the vanes a wastegate turbo will always be a better option. What are your power goals, what modifications are you doing to the pump, max rpm limit?
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#8
by
Fredrikkk
on 29 Nov, 2011 06:24
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Well, before the seals blew, the car was fast enough, only limited by the fact that I didn't have the gov mod. I guess if there is no gain to be had if I don't add VNT control then I might as well just rebuild the K24 that's on there now!
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#9
by
rodpaslow
on 29 Nov, 2011 07:43
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If you're looking for boost to build fairly low 1600-1800 and by 2500 at full boost, I don't know too many turbos that will do that and still allow you to build up to 18-20 psi. My .02$ - vnt is the only way to go. Just don't run a vnt 15 over 18-20 psi like I did. I think the 17 is a better option if you're buying new.
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#10
by
R.O.R-2.0
on 29 Nov, 2011 08:06
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If you're looking for boost to build fairly low 1600-1800 and by 2500 at full boost, I don't know too many turbos that will do that and still allow you to build up to 18-20 psi. My .02$ - vnt is the only way to go. Just don't run a vnt 15 over 18-20 psi like I did. I think the 17 is a better option if you're buying new.
yup, VNT..
mine boosts @ 1500rpms
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#11
by
Fredrikkk
on 29 Nov, 2011 08:19
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If you're looking for boost to build fairly low 1600-1800 and by 2500 at full boost, I don't know too many turbos that will do that and still allow you to build up to 18-20 psi. My .02$ - vnt is the only way to go. Just don't run a vnt 15 over 18-20 psi like I did. I think the 17 is a better option if you're buying new.
yup, VNT..
mine boosts @ 1500rpms
How are your vanes controlled though?
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#12
by
Swartzvw
on 29 Nov, 2011 09:34
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GT1749VNT? (newer VNT15)
or a real VNT17 off a AFN engine?
Im running a GT1749VA off a PD130 as Alcaid mentioned. I am using the exhaust mani off an AFN though.
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#13
by
R.O.R-2.0
on 29 Nov, 2011 12:54
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If you're looking for boost to build fairly low 1600-1800 and by 2500 at full boost, I don't know too many turbos that will do that and still allow you to build up to 18-20 psi. My .02$ - vnt is the only way to go. Just don't run a vnt 15 over 18-20 psi like I did. I think the 17 is a better option if you're buying new.
yup, VNT..
mine boosts @ 1500rpms
How are your vanes controlled though?
they arent..
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#14
by
Fredrikkk
on 29 Nov, 2011 13:49
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So the vanes stay in the position you set them in? I'm getting more and more intrigued by this idea
