GT28 for CA18

aarno11 Apr 2011, 21:53

Hi Guys,

I purchased a GT28 for my s13 CA18, will I have lag?
The difference on the compresion wheel looks scary. 😮
I think the standard weel is 48mm and the gt28 is 54mm

I spoke to couple of guys and they said it will be fine. The guy from mr. turbo said it will be fine. Would I also have to dyno it again.

Your help would be much appareciated.
Thank you!

aaep88611 Apr 2011, 22:00

it a good upgrade~! no need to dyno~!

aarno11 Apr 2011, 22:10

aep886 wrote:

it a good upgrade~! no need to dyno~!

thanx - will I feel a difference and what boost can one run with pump feul?

aaep88611 Apr 2011, 22:16

have you got a adjustable actuator?
mine GT28R from S15 with HKS actuator on the SR20det gives me 1,5bar ... but i am going to turn it down to 1,2bar

aarno11 Apr 2011, 22:23

aep886 wrote:

have you got a adjustable actuator?
mine GT28R from S15 with HKS actuator on the SR20det gives me 1,5bar ... but i am going to turn it down to 1,2bar

Yes it is adjustable.

GGrobblere12 Apr 2011, 16:58

i have the T28 on at stock boost, and it feels perfect to me,, the boost comes in early already.

For daily the T28 seems to be to be a good choice. Max ill take it would be .8 when i have all the supporting mods...

If im settled ill just put on the T3/4 😀

aarno12 Apr 2011, 17:26

Grobblere wrote:

i have the T28 on at stock boost, and it feels perfect to me,, the boost comes in early already.

For daily the T28 seems to be to be a good choice. Max ill take it would be .8 when i have all the supporting mods...

If im settled ill just put on the T3/4 😀

The GT28 I purchased has a T4 compresion wheel. 54mm AND THE STOCK ONE HAS 48mm

aarno13 Apr 2011, 09:53

I have Started to fit the GT28.......very close fit indeed, the compresion housing is so much bigger! it clears the exhaust manifold by 1 or 2MM's
I will have to modify the acuator mounting bracket as well. not as easy as it seemed. still woried about lag...

aarno13 Apr 2011, 10:05

aarno13 Apr 2011, 10:08

aaep88613 Apr 2011, 11:11

you cant link pic from facebook^^

aarno14 Apr 2011, 09:15

aep886 wrote:

it a good upgrade~! no need to dyno~!

spoke to some guys, the said I will have to dyno again

ddjtreble15 Apr 2011, 08:53

You will only have to dyno it if your run different boost. I ran a T28 on a CA at standard boost for a while before I could fit a stage 2 map and supporting mods.

aarno15 Apr 2011, 09:40

djtreble wrote:

You will only have to dyno it if your run different boost. I ran a T28 on a CA at standard boost for a while before I could fit a stage 2 map and supporting mods.

Apparently the GT28 is bigger than the T28, Some even said I will have to put in bigger injectors. I want to run 0.7 / 0.8 bar boost. I think I should finish fitting it and take it for a drive. I'm running go-tech pro management.

paste this link into your browser and see if you can check the pic of the old vs new compresion wheel.

http://www.facebook.com/photo.php?fbid=10150159678874304&set=a.96612459303.83593.728244303&type=1&theater#!/photo.php?fbid=10150159679309304&set=a.96612459303.83593.728244303&type=1&theater&pid=6302887&id=728244303

ddjtreble15 Apr 2011, 19:54

Oh wait hold on, I thought you were talking about the T28...can you give me the full Garrett code for it (eg. GT2871R)

aarno16 Apr 2011, 14:21

djtreble wrote:

Oh wait hold on, I thought you were talking about the T28...can you give me the full Garrett code for it (eg. GT2871R)

I did not purchase a garrett as they are pricey, I puchased the turbo from mr.turbo in Jetpark, here is the invoice description: GT28/T4 CW.54.2MM

The compresion wheel is 54MM and the standard one use to be 48MM if I am correct.

try and check link from facebook.

I hope this helps.
Thank you!

aaep88616 Apr 2011, 14:45

dont think this turbo is ball bearing... it journal bearing only...
i was thinking about this one not long ago...

pplane^driver16 Apr 2011, 16:59

I think you should sell your t28 and buy one of my GT2871R ball bearing turbos!! 🙂

aarno17 Apr 2011, 16:42

Hi Guys, Has antyone managed to check the pic on facebook of the new vs old turbo ? I have fitted the turbo - I have lag and it only boosts 0.5 at peak revs ????
I will let it cool down and adjust the actuator and see what happens.

thanx!

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