........

awesome write up..should be a sticky :biggthump :biggthump

Thanks. Andreas Miko told me of this set up, and i believe with a good clutch and 3" turbo back, my old car would have ran 12.3-12.5 @ 113-116mph. The car was crazy fast.

i don't understand the point of this if you have a good t28 to use......

i don't understand the point of this if you have a good t28 to use......

A t28 will not fit on a BB manifold, so this is a cheaper way for BB people to upgrade to the T28's larger wheels without buying a new manifold, down pipe, intake pipe, etc.

humm interested so how does it compare to an actual T28 is the power compariable between the t28 and the hybrid T25/T28. Which one spools faster and has more pull and all the other questions that come up when doing such a comparison.

trini

humm interested so how does it compare to an actual T28 is the power compariable between the t28 and the hybrid T25/T28. Which one spools faster and has more pull and all the other questions that come up when doing such a comparison.

trini

To be honest, i have no clue on how well a BB DET with T28.5 pulls. Mine pulled hard, alot harder than the 12.7 1/4 mile time showed. A true T28 will be a better option, but with the extra cost, the hybrid set up is good, With a boost controller, it doesnt have mush more lag than a t25. I never had the wastegate set by a pro, I just eyeballed it and used a boost controller to dial it in. If i would have had it set, it would probley spool more like a T25. It still spools fast and makes power to what I felt like was 7K+ rpms. It didnt fall off like the T25 did.


I no longer own the car.

any more comment on the comaprison btw T28 and a T25/T28 hybrid.

Time to clear the air


trini

if i have a manual boost controller set at 11 psi with a t25, and say i were to do this swap... would it still be set at 11 psi after everything is put back together? also, could the 370's handle 11 psi on this setup?

I am not sure at 3 bar, but at 4 par fuel pressure it would work for sure.

later,Jon

Did youhappen to the the amount of clearance allowed between the wheel and the compressor housing?
-Josh

To be honest, i have no clue on how well a BB DET with T28.5 pulls. Mine pulled hard, alot harder than the 12.7 1/4 mile time showed. A true T28 will be a better option, but with the extra cost, the hybrid set up is good, With a boost controller, it doesnt have mush more lag than a t25. I never had the wastegate set by a pro, I just eyeballed it and used a boost controller to dial it in. If i would have had it set, it would probley spool more like a T25. It still spools fast and makes power to what I felt like was 7K+ rpms. It didnt fall off like the T25 did.


I no longer own the car.

Did you have any other mods on your car that could possibly make it 12.7? I'm thinking of doing this so I save money. Ever get it dynoed to see how many WPH it was running? And one last question.. what did you run the 1/4 mile with the T25? Just want to see the difference.

so the only thing from the T25 you use is the compressor side (milled out) and the wastegate, I should do this this winter and have a little upgrade for spring

the car sure is fast cause i bought the car from tuned200! i have it set 11psi on low and 14psi on high on a dual mbc. it boost right after 3k and bam it hauls. good setup and i always get complement from the dsm guys how this thing is a beast!

Did you have any other mods on your car that could possibly make it 12.7? I'm thinking of doing this so I save money. Ever get it dynoed to see how many WPH it was running? And one last question.. what did you run the 1/4 mile with the T25? Just want to see the difference.

It had S3's. but the car was fast without them. I would have bet money the car would have went 12.3-12.4 in the 1/4 with a stiff enough clutch.

It had S3's. but the car was fast without them. I would have bet money the car would have went 12.3-12.4 in the 1/4 with a stiff enough clutch.

It had S3's, as well as 4Bar 370's with a miko bored maf.

ok now i am going this route, i have decided. Now do i need a perfectly good t28 or can i use one with busted seals?

Also where do i send this to be done and how much am i looking at to complete this hybrid.

trini

I don't think you really need a new T28, you could just rebuilt the one you have.

I second that

Its called reading. ;) If you know much, you would know that a T28 WILL NOT fit on a bluebird manifold. The hybrid T28 will. If you run a true T28 with GTIR manifold, you will need a new downpipe as well. This is a option to upgrade to a T28 without changing the manifold and downpipe and intercooler pipes.

I don't think you really need a new T28, you could just rebuilt the one you have.

this is true. It does not require a new T28. Any GTIR T28 will work, but you do not want to use one until its been rebuilt or is in good working condition.

I always thought it was bad to port out turbo housings due to the possibility to really screw up the turbo's effeincy. :confused: :confused: