fiestaturbo.com

by **fiecos dan** on Sat Oct 21, 2006 3:31 pm

Hi,

at the moment i'm using a T25 on my TT, but they are tooooo laggy, due to the design, (i mean 15 psi @ 3500 rpm), and it seems to be a issue on all TT T25's, as i've tuned a few now from std spec to 200 bhp and all have similar Boost/rpm. also the TT ex mani is being restrictive above 180 bhp, and stops power @ 195 -200 bhp on my spec.

and i've even tuned a T3 TT xr2, and that was 600 rpm less laggy. But the problem is i haven't got the space to fit a T3, a my Rad and inter setup cant be move'd forward, and nor do i want to.

So i've been offered a T2, fully rebuilt to stg1 spec with 360 bearing.

What BHP can this make @ what boost?

And also what power is the Std FRST ex mani good for, as thinkin of trying a pulser T28 on one,

my T25 is rated to 240bhp by universal turbo's, and will hit and hold 23 psi to 6500 rpm, and would do more if i changed the actuator.

Cheers Danny

by **MAD_Adamski** on Sat Oct 21, 2006 4:35 pm

think they can be run about 15 psi max, altho i will put a firm bet sheepman10 will correct me :lol:

by **Oranoco** on Sat Oct 21, 2006 4:37 pm

About 12psi. Much more than this and the turbo will object. TBH I would stick a T3 on. It really isn't laggy as long as you stick to the .36 exhaust housing.

by **fiecos dan** on Sat Oct 21, 2006 4:42 pm

i've tuned a xr2 t, similar spec as mine, but T3, and that was about 600 rpm less laggy than my T25,

But i cant fit a T3 with my Rad and intercooler set up, So looking at other idea's.

by **MAD_Adamski** on Sat Oct 21, 2006 4:43 pm

GT28

by **fiecos dan** on Sat Oct 21, 2006 4:50 pm

Cheers Adam,

But that will need a new mani? and not intrested in spending money on it, as i've got a cossie to get back on the road, and Double glazing, lol

by **Oranoco** on Sat Oct 21, 2006 6:07 pm

Why are you double glazing your Cossie?

by **fiecos dan** on Sat Oct 21, 2006 6:16 pm

Oranoco :Why are you double glazing your Cossie?

For the warmth, and security.

by **heeman10** on Sat Oct 21, 2006 6:17 pm

Won't that add to the weight?

by **fiecos dan** on Sat Oct 21, 2006 6:20 pm

But its worth it.

by **Dave_B** on Sat Oct 21, 2006 6:34 pm

t2 hybrid will run 16psi all day - mine does :wink:

so t2 with 360 bearing in it, but i have switchable 12 to 16, love that switch :lol:

dave

by **ianFRST** on Sat Oct 21, 2006 6:46 pm

fiecos dan :
Oranoco :Why are you double glazing your Cossie?

For the warmth, and security.

id like to see pics when done :bonkers:

id also say, 15psi on a T2 turbo, as for bhp, hmm, not too sure on that, you dont see many (if any) big power FRST running a T2

by **heeman10** on Sat Oct 21, 2006 7:44 pm

fiecos dan :But its worth it.

by **ben26** on Sat Oct 21, 2006 9:01 pm

Oranoco :About 12psi. Much more than this and the turbo will object. TBH I would stick a T3 on. It really isn't laggy as long as you stick to the .36 exhaust housing.

what does it mean when u say stick a .36 exhaust housing on it ??

Cheers Ben

by **black2** on Sat Oct 21, 2006 9:25 pm

Just as guide my FRST was fully rebuilt including new turbo, by us around 3 - 4 years ago to standard specification, however in the last year or so i have started to get some more power out of it, still with the standard T2, its running 12psi and is 185bhp.

HTH

Gareth.

by **black2** on Sat Oct 21, 2006 9:26 pm

ben22 :
Oranoco :About 12psi. Much more than this and the turbo will object. TBH I would stick a T3 on. It really isn't laggy as long as you stick to the .36 exhaust housing.

what does it mean when u say stick a .36 exhaust housing on it ??

Cheers Ben

I believe this refurs to the airflow rating of the exhaust housing, some one please correct if im a wrongun :bonkers:

Gareth.

by **heeman10** on Sat Oct 21, 2006 10:40 pm

black2 :
ben22 : what does it mean when u say stick a .36 exhaust housing on it ??

Cheers Ben

I believe this refurs to the airflow rating of the exhaust housing, some one please correct if im a wrongun

Gareth.

1. You are a wrongun, regardless of your knowledge.
2. Yes, it effectively dictates the characteristics of the volumetric flow rate of the exhaust housing. A smaller A/R ratio will lead to a faster spool up but lower maximum volumetric flow rate, and a larger A/R will increase lag time but mean less backpressure at the top end.

by **black2** on Sat Oct 21, 2006 10:52 pm

by **heeman10** on Sat Oct 21, 2006 10:57 pm

by **black2** on Sat Oct 21, 2006 11:11 pm

What i meant was Its the Air ratio, More lag generally means higher power as the exhaust gasses are having to work harder to spin the blades! :lol:

Gareth.

by **MAD_Adamski** on Sat Oct 21, 2006 11:43 pm

this is why i think sometimes you should explain simply james :lol:

for people like me.....

i think black2 what he is trying to say is basically IMO i think the air has more room to spool/holds more air the bigger the housing therefore the smaller the housing the quicker the spool ie smaller housing = less lag

but smaller housings can reduce your max bhp tho ie my cossie .48 housing will not flow as much bhp as it will on a .63 housing

i may be wrong but thats basically how i see it but i am poo at explaining

by **fiecos dan** on Sun Oct 22, 2006 12:29 am

Ok another question, What power can the T2 FRST mani flow?

by **MAD_Adamski** on Sun Oct 22, 2006 7:09 pm

would have thought it could handle 250bhp mate :-?

by **fiecos dan** on Mon Oct 23, 2006 7:14 pm

So i take it, No one's tried to push their limits with a T2/mani.

by **Oranoco** on Mon Oct 23, 2006 7:23 pm

No point really as the T2 just can't deliver the goods. When the T3 is so readily available and proven most people won't throw pots of cash trying to make something work

by **fiecos dan** on Mon Oct 23, 2006 7:34 pm

i see your point,

but i would of thought some one would of done.

the other option, has no one tried a different turbo on the FRST mani?

by **Oranoco** on Mon Oct 23, 2006 7:38 pm

Have heard one of the Nissan turbo's can be made to fit but didn't pay enough attention as to which one it was :oooh:

by **fiecos dan** on Mon Oct 23, 2006 8:10 pm

i know a Pulser T28 should fit, But will know once my Brother brings me one of his spares round.

by **fiecos dan** on Mon Oct 23, 2006 8:16 pm

Just found out the T2 i've been offered is a STG 1 with 360 bearing.

by **BUTRE** on Fri Oct 27, 2006 7:07 pm

fiecos dan :Just found out the T2 i've been offered is a STG 1 with 360 bearing.

That T2 only has got 360 thrustbearing? Thats only for reliability issues and not for more power.

Never found flowcharts or any other important info about the T2 turbo. Have found about T25 and they really need to spin alot (too high for me 120k+ rpm) to make good flow for 200bhp. Efficiency is crap and because of this ACT's go way too high. If this is for the T25, I assume the T2 is even worse

For the 1.6cvh up to 200bhp the best turbo (on the cheap) for me is the ERST S2 T3 with Trim50 compressor.
0.36 A/R exhaust housing will spool at 3000rpm and the Trim50 gives you good flow for 200bhp with 70% efficiency.

What spec is that pulsar's T28?

by **fiecos dan** on Sat Oct 28, 2006 5:07 pm

not to sure if it's only got a 360 bearing,

But i've decided to not go that route anyway.

i picked up a T28 of a pulser today (brothers got a couple spare)

the exhaust housing and bearing housing is T25, with a T3 comp side.

the exhaust housing is the same as the one on my TT, 0.86 housing.

Dont know of the rest of the spec, but can flow 300-330 bhp on a pulser. @ 1.2-1.4 bar.

by **BUTRE** on Sun Oct 29, 2006 11:48 pm

fiecos dan :not to sure if it's only got a 360 bearing,

But i've decided to not go that route anyway.

i picked up a T28 of a pulser today (brothers got a couple spare)

the exhaust housing and bearing housing is T25, with a T3 comp side.

the exhaust housing is the same as the one on my TT, 0.86 housing.

Dont know of the rest of the spec, but can flow 300-330 bhp on a pulser. @ 1.2-1.4 bar.

Searched a little about this pulsar's std T28 turbo:
Code: TB2804
Compressor: 445436-0001 (Trim 60)

And searched about the T28 turbo from the escort cossie:
Code: TB2807
Compressor: 445436-0012 (Trim 46)

Didnt find any flowchart but beeing the pulsars compressor bigger... go pulsar's T28 :bonkers:

by **fiecos dan** on Mon Oct 30, 2006 12:13 am

i was only gonna go with the T28 if the Frst ex mani had a t25 fitment, but since then i've seen a frst mani, and its different,

and as i strongly believe its the tt ex mani holding me back after 190 bhp.

So i've really got to go T3 mani, and a T3, with a saab 900 exh 0.48 housing.

by **BUTRE** on Mon Oct 30, 2006 3:34 pm

fiecos dan :i was only gonna go with the T28 if the Frst ex mani had a t25 fitment, but since then i've seen a frst mani, and its different,

and as i strongly believe its the tt ex mani holding me back after 190 bhp.

So i've really got to go T3 mani, and a T3, with a saab 900 exh 0.48 housing.

I really don't know about flanges... only know there is a 4 bolt type (used on the T3 up to T4) and 3 bolt type (used on the T2). Between T2 and T3 don't know what kind of flanges there are :-?

Saab 900 turbo I would say its really not up to the job mate.

Compressor Trim40 is really small... it's even smaller than the ERST one beeing Trim45.
0.48 A/R ex housing would be too laggy for the 1.6 CVH engine, spooling only at 3800rpm or so.

by **fiecos dan** on Mon Oct 30, 2006 7:43 pm

A T25 is a 4 bolt flange, but is m8 bolts, and smaller flange than a T3 flange.

i've advised to use a RST turbo, with the saab ex houseing, as it will fit my car.

and i bet the 0.48 housing will be less laggy than my .86 housing i'm using at the mo.

How much power can be done with a std rst turbo with a 360 bearing?

fiestaturbo.com

Turbo options on my xr2tt, advice needed on page 2.

Turbo options on my xr2tt, advice needed on page 2.

fiestaturbo.com

Turbo options on my xr2tt, advice needed on page 2.

Turbo options on my xr2tt, advice needed on page 2.

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