View Full Version : Difference in turbos
James_GSI
09-06-2006, 08:56
theres a lot of talk about different turbos and i wondered what was the main differences between the following:
Standard KKK
VXR
Garrett T28
IHI
Turbo_Scott
09-06-2006, 08:57
theres a lot of talk about different turbos and i wondered what was the main differences between the following:
Standard KKK
VXR
Garrett T28
IHI
I thought the standard was a K04?
Anyways, the VXR which is an enhanced version of the standard mk4 Turbo has a stronger cast & actuator and also holds more boost.
The IHI is even stronger and not sure if it "requires" a new manifold.
The Garrett is stronger still and I think requires a new manifold.
The hybrid (Courtenay, Regal) is inbetween the VXR and the IHI.
... I think this is correct.
I think the IHI requires a new manifold mate - at least it does with the regal one (the kit includes a new tubular manifold)
i was told the vxr actuator is the same as the k04 as its the same part number
Scottyboy
10-06-2006, 07:44
The kkk is the original mk4 turbo. The vxr unit was modified for the H and included stonger casting material and revised impeller vanes to flow more air...i.e. more boost. There is a hybrid that is based on the mk4 version which comes in 2 stages, this also has more aggresive impeller vanes to hold more boost, a 360 degree thrust bearing and uprated actuator. The vxr unit's actuator isn't particularly good when running higher than std boost pressures, and it only has 270 degree thrust bearing. These three variants of the kkk turbo are limited by the fact that they are integrated into the exhaust manifold. This has a given maximum flow rate largely due the restrictive size of the 4 into 1 part of the manifold.
The IHI is a ball bearing type turbo which requires a different manifold. This comes originally from the Impreza (Ishikawajima Harima Heavy Industries, Ltd.) The IHI is part of a kit supplied by Regal (their phase 5) and comes with it's own tubular manifold, tubular manifolds are prone to cracking however and therefore a cast manifold is better. The phase 5 kit is £3800 though.
The only cast manifold available at the moment is the dbilass one, which is questionable as the design does not actually allow a significant improvement of flow rate over the original. You can however fit the GT28 to this manifold with an adapter plate, but again you are still limited by the flow rate of the manifold. The GT 28 series of turbo charger are produced by Garret, and is a ball bearing type turbo (these spin up faster and therefore reduce turbo lag), they are compact and come in differing specifications up to 420bhp......it's all about the manifold once you start to look at more than 290 bhp.
Jom has the dbilass GT28 fitted to his VXR, but as yet there are no posted figures.
MadMunky
10-06-2006, 08:56
So would this fit a astra/zafira?
http://cgi.ebay.co.uk/Nissan-s14-200sx-sr20-garrett-T28-turbo-pulsar-gtir_W0QQitemZ4646878826QQcategoryZ10402QQssPageNa meZWDVWQQrdZ1QQcmdZViewItem
Scottyboy
10-06-2006, 10:49
So would this fit a astra/zafira?
http://cgi.ebay.co.uk/Nissan-s14-200sx-sr20-garrett-T28-turbo-pulsar-gtir_W0QQitemZ4646878826QQcategoryZ10402QQssPageNa meZWDVWQQrdZ1QQcmdZViewItem
Almost any turbo will fit with the correct manifold. can't see from the pictures what the wastegate setup is on that particular unit either - ideally you want an internal setup for ease of fitting. It would also require a custom downpipe.
There are many different models in the GT28 series...
http://www.turbobygarrett.com/turbobygarrett/products/turbochargers.html
Almost any turbo will fit with the correct manifold. can't see from the pictures what the wastegate setup is on that particular unit either - ideally you want an internal setup for ease of fitting. It would also require a custom downpipe.
There are many different models iin the GT28 series...
http://www.turbobygarrett.com/turbobygarrett/products/turbochargers.html
So what is the differance between the LEL LEH LET then ,,.as asked i have a LEL and want to upgrade it ,,do i need to get the VXR turbo or not .. and anything else diff on the two engines inside .?
Scottyboy
12-06-2006, 04:21
So what is the differance between the LEL LEH LET then ,,.as asked i have a LEL and want to upgrade it ,,do i need to get the VXR turbo or not .. and anything else diff on the two engines inside .?
As far as I am aware the LEL and LET share the same standard turbo and internals - it's the software that differs, the LEH has the vxr unit and the uprated internals. If you've done high miles and for the price, it's worth getting the VXR unit. If you've done say less than 45k then I'd keep your std unit on - also depends on what power you want to get to?
As far as I am aware the LEL and LET share the same standard turbo and internals - it's the software that differs, the LEH has the vxr unit and the uprated internals. If you've done high miles and for the price, it's worth getting the VXR unit. If you've done say less than 45k then I'd keep your std unit on - also depends on what power you want to get to?
#
Well only on 4k now so not even run in yet ,,but as the car is off the road was thining is it worth doing the VXR unit now ,before i go any more as to power well anything up to the same as the LEt will be nice 200 with a re map and then 245 up wards to get that i will be happy ..
MadMunky
14-06-2006, 13:47
Why is it everyone seem to upgrade to the VXR Turbo and not a Garrett T28?
If my GSI is standard but i fitted the Garrett T28 and manifold what type of advantage would i get or would it just mess up the car without having new pistons/intercooler etc?
Scottyboy
14-06-2006, 18:06
Why is it everyone seem to upgrade to the VXR Turbo and not a Garrett T28?
If my GSI is standard but i fitted the Garrett T28 and manifold what type of advantage would i get or would it just mess up the car without having new pistons/intercooler etc?
....because nobody knows yet what the power gains are vs. cost (if any with the dbilass manifold), and whether it is reliable or not.
To be honest I would have kept my original turbo on the 888 as I feel that the VXR turbo has restricted the car's performance.
To be honest I would have kept my original turbo on the 888 as I feel that the VXR turbo has restricted the car's performance.
Why? Vxr turbo is better........