R25 sti

i have a version 6 type r,with a scoobyclinic 2.5ltr conversion,vf34 hybrid, aps top mount duel core intercooler,aps cold air induction,aquamist spray,blitz sbc-id boost controller and 440 injectors.milltec exhaust system and sports cat .i am just wondering what sort of bhp i should be exspecting.i am due to go back to scoobyclinic soon for a remap and a run on the rollers.i also have a set of 550 injectors ready to fit.....anyone have any idears......r25 sti

john banks

330 BHP +-10%.

R25 sti

i was hoping for abit more than that,what do you think is my most limiting mod(this is open to anyone)....cheers.

R19KET

The turbo.

Mark.

R25 sti

when i bought the turbo from turbo dynamics they told me in standard form it would be good for 340bhp and if i had the hybrid (which i did)it would be good for 380bhp are you all telling me this is not the case.....thanks for all help and advise.......i forgot to mention i also have an uprated fuel pump+regulator,equal length headers and an ecutec remap.....thanks r25 sti.

R19KET

Ok, well I guess if the turbo is rated to 380bhp, that's what you should expect, all other things being equal.

Mark.

R25 sti

i have just rang turbo dynamics to check on my figures and they have just confirmed it is definiatly good for 370-380bhp depending on other mods ....i hope there will be more reaction as people finish work.....cheers r25 sti

p1doc

the vf34/35 is supposed to be 350bhp max,depends what they have done to make it a hybrid,if you get 380bhp it could realistically be 350bhp depending on dyno etc
martin

R25 sti

im not sure about the tecnical details.new wheel ,ground angels new bearings etc.the chap at turbo dynamics read of a list too quick for me to list.
i supose ill have to see what the car makes on the rollers at scoobyclinic and compare to others....cheers.

john banks

Still got a restrictive VF turbine wheel though I presume unless it is a Garrett core with just a P18 housing, but these aren't usually called VF34 hybrids.

If it makes you happy, just say it is 380 BHP and don't dyno test it anywhere pessimistic

There are too many high power claims for turbos that go about that are plain unrealistic, just ends up with people disappointed and suppliers making excuses. The market needs to be more realistic.

R25 sti

it dosnt make me happy just to think i have a certain power,i like to know what i have.i do realise there are alot of people that have different idears as to what power certain combinations of mods achieve.but a turbo must have a certain power delivery.i also realise different dynos give different results.im not after as much power as possiable,i am happy with my car as it is except a problem with the dump valve,but thats another question.....cheers r25 sti.

R25 sti

dose anyone know what turbo is fitted to the T25.

Daveo

I would say the injectors. My 440's are running at over 90% duty cycle on my 2.2 stroker with an MD304 turbo, and it's barely breaking the 300bhp barrier.

Get the injectors uprated soonest.

Dave

scoobyDAZZA

yeah,fit the 550cc then a tweak to the mapping

lets some pics of the car then ;-)
sti6 type r . . . . mmmmmmmmmmmmmmmmmmmm

R25 sti

i already have the 550 injectors just waiting for the window of time to fit them.how long do they take to fit?http://img.photobucket.com/albums/v7...y/b8a77f1e.jpg

hades

The T25 has a twin-scroll hybrid, you won't bolt one of those on without new headers, up and down-pipes etc. Their dyno runs have been at powerstation, so I wouldn't be surprised to see a T25 make ~380bhp on one of the more optimistic rollers.

With a VF34 (hybrid or otherwise) on a 2.5, you will have quicker spool up than most scoob drivers could ever dream of, will probably be very nice to drive daily as a result

R25 sti

what is the difference in looks of a twin scroll and normal turbo.i ask this question because the new turbo i fitted had two different size veins one set under the other.(ill ring turbo dynamics to find out tommorow to be sure).i had allot of work done at powerstation on my car whilst they were building the T25,they got me intouch with turbo dynamics.i beleave they built the T25 turbo!

gazza19800sti1

better off with at least 550 injectors ,fuel reg, modded rails , and uprated pump , 550 cc ones will give ya at max 420 , if i was you go for 740s and dont max out then , then maybe a gt30 turbo on uprated up pipe and down pipe see scooby mania site selling pipes for 650, but you will need a external wastgate another 400 notes . and then price of turbo .... maybe go same route as me and go for a sbr gt12 run about 1.3 bar and get around 440 bhp bottom end limits this in standard 2.5 form , oh also front mount ,,, alot of cost mate up to you these things cost alot of money , another thing is six speed next or prated internas for yours can get uprated for about a grand from usa , then fitting needed

gazza19800sti1

also mate was the figures for the turbo on a 2.0 lump or 2.5 cause 2.5 needs bigger turbo to get same bhp so if maybe figures given on 2.0 lump at 380 you will only get 330 on a 2.5 cause more volume to fill at same boost pressure

john banks

That is just plain wrong in theory and experience IMHO.

440cc injectors are fine at 4 bar static pressure with the right regulator (SX not FSE) to handle the sort of power a P18 hotside hybrid or a 16G can throw at it. They also idle and atomise better than some 550s. And you don't need modded rails.

hades

Edit - JB beat me to it, whilst I was busily disagreeing with Gazza myself. I second what JB said. Same volume of air at same AFR and same VE will give as much power whatever the engine size. Look at the compressor maps, if you're getting less boost on the 2.5 it'd be because you're flowing more air = more power (simplistically, I know).

Difference with twin-scroll is that the headers and up-pipe keep the gasses from the two pairs of cylinders separate all the way into the turbo. Therefore, the bigger difference is the headers and up-pipe. If you'rs is a VF34 hybrid and running your original STi6 headers (or most aftermarket headers), there is no way you'll have a twin-scroll turbo.

As the T25 proves, twin scroll when implemented well on a 2.5L engine is VERY nice when it comes to torque delivery.

R25 sti

gazza19800sti1 thanks for your reply but you have moved away from my original questions....sounds like you have got abit excited....cheers....r25 sti.
thanks for your help john!!!

R25 sti

the vf34 i bought had two sets of veins! larger turbine wheel ,360 degree thrust bearing and reprofiling work done,i gather this is standard hybrid work...thanks to all i now now what twin scroll means.

TonyBurns

iTrader: (3)

Twin scroll is the method of delivering the gasses to the turbo, you get it in 2 phases basically so it reduces lag.
You would need a bit of work to go the twin scroll way, if you look at the T25, its only the bottom end thats 2.5, the rest is all JDM 2ltr.

Tony

R25 sti

thank you......r25 sti

john banks

You sure it was a larger turbine wheel? 90% of the time it is just the compressor wheel... different if you are in a series of cores where there is a bigger turbine wheel available... eg TD05H, TD06, TD06H.

R25 sti

as you may have guessed im new to tecnical gargon,but thats what the man said at turbo dynamics,he said he will fax me all the details of what they do today.im pritty sure that he mentioned both wheels being larger.i did buy it late last year so he may have been confused.ill let you know later hopefully....

R19KET

It won't be a bigger exhaust wheel, at best, they may have clipped it, so it can flow more.

Mark.