GT28 for CA18

arno · Post by **arno** » Mon Apr 11, 2011 9:53 pm

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!

aep886 · Post by **aep886** » Mon Apr 11, 2011 10:00 pm

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

arno · Post by **arno** » Mon Apr 11, 2011 10:10 pm

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?

aep886 · Post by **aep886** » Mon Apr 11, 2011 10:16 pm

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

arno · Post by **arno** » Mon Apr 11, 2011 10:23 pm

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.

Grobblere · Post by **Grobblere** » Tue Apr 12, 2011 4:58 pm

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

arno · Post by **arno** » Tue Apr 12, 2011 5:26 pm

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

arno · Post by **arno** » Wed Apr 13, 2011 9:53 am

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...

arno · Post by **arno** » Wed Apr 13, 2011 10:05 am

arno · Post by **arno** » Wed Apr 13, 2011 10:08 am

aep886 · Post by **aep886** » Wed Apr 13, 2011 11:11 am

you cant link pic from facebook^^

arno · Post by **arno** » Thu Apr 14, 2011 9:15 am

aep886 wrote:it a good upgrade~! no need to dyno~!

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

djtreble · Post by **djtreble** » Fri Apr 15, 2011 8:53 am

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.

arno · Post by **arno** » Fri Apr 15, 2011 9:40 am

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= ... =728244303

djtreble · Post by **djtreble** » Fri Apr 15, 2011 7:54 pm

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