best turbo for 400 bhp on a cossie
#1
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best turbo for 400 bhp on a cossie
whats the best turbo for going 400 bhp (roughly) on a cossie ? The engine is freshly re-build with low comp pistons no valve cut outs std cams and no head work its been build with a multi layer head gasget , high pressure oil pump and water pump all new nuts and bolts and gasgets the car has a t34.48 on it at the moment and running greens . i'm looking to change the turbo as the one i have is on its way out. so wondered what turbo is the best route to achive around 400 bhp or is it no way possible with this spec ? i know injector and chip change will be needed . also i dont want the car to be really laggy and un driveable on a daily basis .
i know its a big ask but any help/advice greatfull acepted
i know its a big ask but any help/advice greatfull acepted
#3
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From: Blackpool
And the cut back blades made it less laggy despite the general concesus being that it makes it more laggy, my boost was a bit high at 37psi spike but it tailed off to 29 at the top end and was uncatchable round the streets etc.
#4
37psi !!! on T34.63. what injectors were u using.
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#12
55 housing is a good call IMHO, although probably wont quite make 400, but who cares if its 387 instead or whatever, will still go the same in the real world!
Last edited by Chip; 22-12-2009 at 07:58 PM.
#19
i did 370bhp 420 lb/ft on a t34.48, on our std engine off the shelf 55lb siemens package at 36psi
the same with a t34.63 will get you darn close to 400, but imo the .48 rocks for road use
T34s rarely hold much boost to the limiter as the compressor is so small a yb consumes all the air easily at high rpm, a .48 will end up with 20-22psi at 7k with the wastegate welded shut
the same with a t34.63 will get you darn close to 400, but imo the .48 rocks for road use
T34s rarely hold much boost to the limiter as the compressor is so small a yb consumes all the air easily at high rpm, a .48 will end up with 20-22psi at 7k with the wastegate welded shut
Last edited by JTECH James; 22-12-2009 at 08:39 PM.
#20
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i was told a t34 would be on its limit for 400bhp and would probibly not last long at oost levels needed to make 400bhp. i'm up for the siemens 55lbs
#21
the .63 will get you close if you can live with it, in its nature it will make its power at higher rpm,
i personally would go with the .48 on our 55 siemens package , its fookin awesome! run it at 32psi and its reliable
i can do 30%off tomorrow on the chip!
i personally would go with the .48 on our 55 siemens package , its fookin awesome! run it at 32psi and its reliable
i can do 30%off tomorrow on the chip!
Last edited by JTECH James; 22-12-2009 at 08:47 PM.
#23
i had t34.55, siemens 55lb, msd chip, 500 cooler, 3 map bar, stock motor engine & CR
30 psi peak, holding 25/26psi
made for a awesome road car, would hammer m3's all day long, i could have upped the boost a bit more, but decided to leave it at 2 bar (30 psi).
It got absued everytime i drove it and never missed a beat (apart from split water hose!)
30 psi peak, holding 25/26psi
made for a awesome road car, would hammer m3's all day long, i could have upped the boost a bit more, but decided to leave it at 2 bar (30 psi).
It got absued everytime i drove it and never missed a beat (apart from split water hose!)
#27
mine is running a ggr 34.63 peaking at 34 and holding 30 psi, 3 bar ,500 cooler, stock engine,rughly 380bhp maybe a bit laggy and as james says comes on song higher up the revrange ,but when its goin you aint got time to look at the clocks to see what speed your doing.
#34
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mine is running a ggr 34.63 peaking at 34 and holding 30 psi, 3 bar ,500 cooler, stock engine,rughly 380bhp maybe a bit laggy and as james says comes on song higher up the revrange ,but when its goin you aint got time to look at the clocks to see what speed your doing.
#35
#37
#38
well i was on bd14s with a virtually standard port head and she made 472 bhp 342 lbft.
as long as it was revved between 500 - 7800 rpm it was relentless power.
i think i may have to go and get my speedo vid and post it AGAIN lol
as long as it was revved between 500 - 7800 rpm it was relentless power.
i think i may have to go and get my speedo vid and post it AGAIN lol
#39
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that would be nice but i have only just re-built the engine and would not want to pull the bottom end apart again to uprate bits to take that spec turbo