GT28 Series
 

Hello all,

I'm currently running a CR T38.48 and looking for something with a bit more punch/less lag.

Aiming for around 400bhp and 400lbft

Basic spec as follows:
205 Block with standard head and cams
JE WRC pistons 9.2:1 CR
Asnu 600cc injectors
Omex 600
2WD exhaust manifold
Airtech 70mm inter cooler

Don't think I will head down the route of a GT30. I have been discussing with my tuner of using a GT28 and possibly fitting some cams with it. I have BD14 cams available.

Does anyone have a GT28 or GTX28 fitted and would they please share some spec and dyno sheet. Any help would be appreciated.

Thanks:top:

You could struggle a bit with that CR, especially if you`ve got a skimmed head (most are)!


I would look at an efr6758 should be able to pick it up for about 1K now.

T34 0.63 will do what you need but it will be on its knees

Don't want to run t34 because as you say it will be on its knees. Also don't want to run massive boost, looking to only run around 1.5bar.

why not keep the t38 but change the ex housing to a 63?
tbh I ve never heard of a 38 run with a 48 ex housing before

I changed the housing to a .48 in a moment of madness in an effort to reduce lag! :wall::wall:

Instead of changing back again I was looking at the GT28/GT30 route to upgrade from the T38 altogether. Even though the GT30 might not be that much better in terms of lag.?

I have BD14 cams available so might fit them with the T38 with a .63 housing and drive on from there.

I had a GT3076r and it was laggy as hell mate - not going down that route again

Yes, I don't think that A GT30 will suit me.

I would love to see dyno graphs for GT28's.

A well sorted engine is capable of running 2bar boost all day long. We have chatted before and I would be sticking with the T38 with a 0.63 housing.

GT2871r 56 trim.

Perfect for your needs.

T.

Efr?.......

Erf
 

Could a twin scroll ERF be made to work with the Yb 2Wd twinscroll exhaust manifold?

Yes.

I run a T34.48 stg 2 cutback blades
421bhp and over 400 lbft.

With 9:1 comp and a live map on a 63 housing would be great. And around your target figure. But with more than 1.5bar of boost.

I run about 36 peak holding 27ish.

Many different options out there a good mapper will make the difference.

Paul

Paul,

Do you drive your Cossie because how the fuck it's lasting at that power on a .48 housing amazes me

Yep goes like fuck. I just set it up correctly..
As you know i am a fussy fucker....
I have a workmate with a Triumph daytona he could not get away from me after dropping 2 cogs.....
And thats was in 5th lol....

It will go bang but not from boost from old age.:cry:

I think the B1 frame efr should fit the standard manifold. You only have to change the flange to a t4.
7163 will make 500bhp and spool will be better then t34.
I will be using a 6758 twin scroll but have a tubular manifold.

When you say as laggy as hell what kinda revs are well talking where it made full boost out of interest?

Cheers Paul