T28's

[mgbond]

Hi Guys,

Anyone got any good condition or refurbed T28s up for Grabs. Car goes in soon and we suspect the smoking is turbo related. So I have option to refurb/upgrad my T25's or swap straight to 28s.

Its all depending on cost.

I ultimatly want to get to +400bhp on a 2.5 so I'm told the T25's may be hard pushed to get me there. This is future we are talking about as I still need free flow exhaust/valve springs but thought best to get there one bit at a time. Will the std injectors be ok?


Cheers

Bondy

[Lakelord]

Martin, get in contct with Universal Turbos. http://www.universal-turbos.com/ They're just up the road from you and may take your T25's in as a part ex.

[mgbond]

Thanks, already spoke to them. They can refurb mine and change the exhaust housing to 28's. Just trying to see my cost options.

Bondy

[Blu3R]

mgbond said:

They can refurb mine and change the exhaust housing to 28's. Just trying to see my cost options.

Just purely out of interest, how much did they want to refurb and convert a pair to T28 spec?

[mgbond]

Blu3R said:

mgbond said:

They can refurb mine and change the exhaust housing to 28's. Just trying to see my cost options.

Just purely out of interest, how much did they want to refurb and convert a pair to T28 spec?

Worst case as it depends on the condition to start with, I'm looking at £524+ VAT ea. My issue now is that I should probably bite the bullet and have the e haste done at the same time to save on labour parts and a bit of mapping. Going to be costly. :-(

[Gadgeroonie]

if i were you - i would consider a single turbo conversion

if would work out cheaper if you were going to do the turbo's and exhaust

a GT30 would be a great choice of turbo and would easily make the power

one turbo is cheaper to buy than two

[mgbond]

Gadgeroonie said:

if i were you - i would consider a single turbo conversion

if would work out cheaper if you were going to do the turbo's and exhaust

a GT30 would be a great choice of turbo and would easily make the power

one turbo is cheaper to buy than two

I agree but I don't want to be different as I know it can bring up issues not thought about so as the exhaust is already jigged then I'm not sure the cost difference would that much.

Edited by mgbond on Thursday 8th July 17:46

[2.5bluenob]

mgbond said:

Hi Guys,

Anyone got any good condition or refurbed T28s up for Grabs. Car goes in soon and we suspect the smoking is turbo related. So I have option to refurb/upgrad my T25's or swap straight to 28s.

Its all depending on cost.

I ultimatly want to get to +400bhp on a 2.5 so I'm told the T25's may be hard pushed to get me there. This is future we are talking about as I still need free flow exhaust/valve springs but thought best to get there one bit at a time. Will the std injectors be ok?


Cheers

Bondy

My turbos are fecked so looking to refurb and upgrade as i think my car is in need of more power. But would the t28's be more laggy??? how far in hp will 25's take me and at what boost????
cheers Steve

[mgbond]

I'm looking for 400 in the end but to get this the T25's will be flat out so the 28's should breeze it and I do not want to run more than a bar peak 0.9 continuous. the exhaust is the bit that will show the most gain as the std is so restricted. The lag will not be that noticable but as part of the refurb the turbos will be better than std.

Also eventually I will need to upgrade the valve springs, this will allow higher reving and more boost.

Bondy

[Lakelord]

mgbond said:

I'm looking for 400 in the end but to get this the T25's will be flat out so the 28's should breeze it and I do not want to run more than a bar peak 0.9 continuous. the exhaust is the bit that will show the most gain as the std is so restricted. The lag will not be that noticable but as part of the refurb the turbos will be better than std.

Also eventually I will need to upgrade the valve springs, this will allow higher reving and more boost.

Bondy

If you're planning to go up to 400Bhp, don't forget to put a few quid aside to get the gearbox rebuilt after you've lunched that as well

[Mike Tuckwood]

T25's are more than capable of supplying enough air to hit and exceed 400bhp.


Mike.

[Vixpy1]

Mike Tuckwood said:

T25's are more than capable of supplying enough air to hit and exceed 400bhp.


Mike.

I agree, easily capable.. and if you really want T28's go and browse the classifieds of the SXOC, loads of peeople take T28's off for upgrades

[mgbond]

Lakelord said:

mgbond said:

I'm looking for 400 in the end but to get this the T25's will be flat out so the 28's should breeze it and I do not want to run more than a bar peak 0.9 continuous. the exhaust is the bit that will show the most gain as the std is so restricted. The lag will not be that noticable but as part of the refurb the turbos will be better than std.

Also eventually I will need to upgrade the valve springs, this will allow higher reving and more boost.

Bondy

If you're planning to go up to 400Bhp, don't forget to put a few quid aside to get the gearbox rebuilt after you've lunched that as well

Not conviced that is an issue. I have the LSD already and the box should be fine if i keep the torque under 400.

Hmmm, even universal turbos suggest changing the exhasut housing to the 28's?

[Lakelord]

mgbond said:

Lakelord said:

mgbond said:

I'm looking for 400 in the end but to get this the T25's will be flat out so the 28's should breeze it and I do not want to run more than a bar peak 0.9 continuous. the exhaust is the bit that will show the most gain as the std is so restricted. The lag will not be that noticable but as part of the refurb the turbos will be better than std.

Also eventually I will need to upgrade the valve springs, this will allow higher reving and more boost.

Bondy

If you're planning to go up to 400Bhp, don't forget to put a few quid aside to get the gearbox rebuilt after you've lunched that as well

Not conviced that is an issue.

Well it was for me and mine is running just shy of 400

Best of luck

[elf63]

I've got a pair of hardly used T25's if anyone's interested.

[mgbond]

Lakelord said:

mgbond said:

Lakelord said:

mgbond said:

I'm looking for 400 in the end but to get this the T25's will be flat out so the 28's should breeze it and I do not want to run more than a bar peak 0.9 continuous. the exhaust is the bit that will show the most gain as the std is so restricted. The lag will not be that noticable but as part of the refurb the turbos will be better than std.

Also eventually I will need to upgrade the valve springs, this will allow higher reving and more boost.

Bondy

If you're planning to go up to 400Bhp, don't forget to put a few quid aside to get the gearbox rebuilt after you've lunched that as well

Not conviced that is an issue.

Well it was for me and mine is running just shy of 400

Best of luck

I'm going to have the torque capped at 380 as its the torque that destoys the box and not the bhp. As you say, we will just have to see.

The 28's will allow me to have better power through out the rev range with a slight bit of lag. what would people suggest i do?

[Mike Tuckwood]

mgbond said:

The 28's will allow me to have better power through out the rev range with a slight bit of lag. what would people suggest i do?

Have the T25's refurbed as they are prone to wear and tear problems, and fit slightly stronger actuators. They WILL out perform T28's with your suggested performance targets.


Mike.

[2.5bluenob]

elf63 said:

I've got a pair of hardly used T25's if anyone's interested.

Elf63 how much do you want for them??

[mgbond]

Mike Tuckwood said:

mgbond said:

The 28's will allow me to have better power through out the rev range with a slight bit of lag. what would people suggest i do?

Have the T25's refurbed as they are prone to wear and tear problems, and fit slightly stronger actuators. They WILL out perform T28's with your suggested performance targets.


Mike.

Cool, cheers mike. what do stronger actuators do. I want them to be 0.5 bar without boost controller so I can adjust the range from 0.5 to 1.

I think Universal sadi that they change the actuators for better ones and will fit 360 bearings.

[2.5bluenob]

mgbond said:

Lakelord said:

mgbond said:

I'm looking for 400 in the end but to get this the T25's will be flat out so the 28's should breeze it and I do not want to run more than a bar peak 0.9 continuous. the exhaust is the bit that will show the most gain as the std is so restricted. The lag will not be that noticable but as part of the refurb the turbos will be better than std.

Also eventually I will need to upgrade the valve springs, this will allow higher reving and more boost.

Bondy

If you're planning to go up to 400Bhp, don't forget to put a few quid aside to get the gearbox rebuilt after you've lunched that as well

Not conviced that is an issue. I have the LSD already and the box should be fine if i keep the torque under 400.

Hmmm, even universal turbos suggest changing the exhasut housing to the 28's?

What about the clutch???