What car for turning up the boost to silly amounts?
Discussion
Mr Dave said:
Supras are great for this, massively strong bottom ends, theres been a few with standard internals with uprated turbos pushing out close to or over 1000 bhp.
However because of this and the whole bodykit phase and being relatively cheap, its almost impossible to get a nice one.
Now for me to get a nice standard one im looking the thick end of 10k just to get one that hasnt been barried too badly. It will be worth it though.
1000bhp on stock internals?However because of this and the whole bodykit phase and being relatively cheap, its almost impossible to get a nice one.
Now for me to get a nice standard one im looking the thick end of 10k just to get one that hasnt been barried too badly. It will be worth it though.
y2blade said:
Mr Dave said:
Supras are great for this, massively strong bottom ends, theres been a few with standard internals with uprated turbos pushing out close to or over 1000 bhp.
However because of this and the whole bodykit phase and being relatively cheap, its almost impossible to get a nice one.
Now for me to get a nice standard one im looking the thick end of 10k just to get one that hasnt been barried too badly. It will be worth it though.
1000bhp on stock internals?However because of this and the whole bodykit phase and being relatively cheap, its almost impossible to get a nice one.
Now for me to get a nice standard one im looking the thick end of 10k just to get one that hasnt been barried too badly. It will be worth it though.
Legnum/Galant VR4 (or whatever that hot V6 version with the Evo underpinnings is called) is a prime candidate. Friend had one which went to the Ring several times and it was laughably quick with a restrictor on the wastegate pressure hose, as well as delivering sofa-level comfort for 4. At the price you can pick these up for, engine longevity ceases to be a concern.
Olivera said:
The internet would have you beleive you just 'turn the boost up', but that isn't anywhere near the truth when getting much more power.
Not *strictly* true - but gaining silly power by upping the boost is a recipe for conrod soup (actually, more likely holed/melted pistons) in the short/medium term if you go too far without additional mods.v8will said:
CraigyMc said:
Gearboxes are rated by torque rather than power.
Of course, But it is a fair rule of thumb that big power + torque go hand in hand.The current crop of F1 cars have about 200lb.ft of torque and about 740 horsepower.
If you mean torque, then say torque, not horsepower: they aren't the same thing. It's that sort of sloppiness that makes it impossible for newbies to learn anything correctly.
C
If it's only high boost levels you want, then an old turbo diesel barge and a bleed off boost controller are what you need. Or just block up the wastegate pipe altogether.
Doing this I can get my Volvo 940 TD to go off the end of the 1.5bar boost gauge very easily, probably up to nearly 2 bar. It's very crude and makes sod all difference to the performance because the fuel pump can't keep up, but the sound of the turbo going nuts is quite cool.
Doing this I can get my Volvo 940 TD to go off the end of the 1.5bar boost gauge very easily, probably up to nearly 2 bar. It's very crude and makes sod all difference to the performance because the fuel pump can't keep up, but the sound of the turbo going nuts is quite cool.
CraigyMc said:
Pretty crappy rule if you ask me.
The current crop of F1 cars have about 200lb.ft of torque and about 740 horsepower.
If you mean torque, then say torque, not horsepower: they aren't the same thing. It's that sort of sloppiness that makes it impossible for newbies to learn anything correctly.
C
Well, it's not exactly a crap rule - power equals torque times revs, it's that simple. In most turbo road cars, the peak power and torque figures are going to be around the same points, so it's fair to say that if the car had 300bhp and now has 900bhp, the torque figure will also be roughly tripled. So, since we're talking power gains, you could still use those numbers to get an idea of how the gearbox will cope.The current crop of F1 cars have about 200lb.ft of torque and about 740 horsepower.
If you mean torque, then say torque, not horsepower: they aren't the same thing. It's that sort of sloppiness that makes it impossible for newbies to learn anything correctly.
C
Engines are rated by torque too, don't forget, that's what's measured. The power output number is just a product of that torque and the rotational speed at which it comes.
Comparing a Formula 1 car's figures is not that relevant if you ask me
I am running my saab 2.3 donk at 1.9 bar boost and making 487 hp
This used to be on std internals
It lasted 60 k miles at his boost level (on a 200 k motor...)
but a waterway cracked in the head and I had some oil starvation problems at Cadwell park and the engine was toast
re-built with a forged bottom end now
good for another 500 k....
This used to be on std internals
It lasted 60 k miles at his boost level (on a 200 k motor...)
but a waterway cracked in the head and I had some oil starvation problems at Cadwell park and the engine was toast
re-built with a forged bottom end now
good for another 500 k....
Nissan 200SX with the SR20DET engine.
Phenomenally strong bottom end, RWD chassis to actually make use of the power you're making, and a wealth of cheap and no so cheap tunic parts.
You get up to 260bhp just by turning up the boost, but it is risky without fuelling mods.
A new fuel pump and a proper boost controller sees around 260-280 bhp at 14psi. Horsham developments do the 'benchmark' chip for this, the 'stage 1a).
After that the turbo runs out of puff, so various T3 style turbos are used, along with bigger injectors (nismo 555's are popular). 350-400bhp easily achievable without opening the engine, though many do for pistons etc.
The bottom end is awesome - the stock crank is used in drag cars up to 900bhp, the block has oil squirters built in, and the pistons are also forged and very strong.
Top end can use cams etc like any other tuned engine.
Gearbox is strong and any number of aftermarket clutch options are about to hold the torque.
Although, if your sole requirement is 'highest boost pressure' then diesel is really the way fowards - the only limiting factor is the physical strength of the engine and how much fuel you can inject. Detonation is not a problem!
Phenomenally strong bottom end, RWD chassis to actually make use of the power you're making, and a wealth of cheap and no so cheap tunic parts.
You get up to 260bhp just by turning up the boost, but it is risky without fuelling mods.
A new fuel pump and a proper boost controller sees around 260-280 bhp at 14psi. Horsham developments do the 'benchmark' chip for this, the 'stage 1a).
After that the turbo runs out of puff, so various T3 style turbos are used, along with bigger injectors (nismo 555's are popular). 350-400bhp easily achievable without opening the engine, though many do for pistons etc.
The bottom end is awesome - the stock crank is used in drag cars up to 900bhp, the block has oil squirters built in, and the pistons are also forged and very strong.
Top end can use cams etc like any other tuned engine.
Gearbox is strong and any number of aftermarket clutch options are about to hold the torque.
Although, if your sole requirement is 'highest boost pressure' then diesel is really the way fowards - the only limiting factor is the physical strength of the engine and how much fuel you can inject. Detonation is not a problem!
thecremeegg said:
Bit of a needless example though given that you'll struggle to find a roadcar that revs to 15,000 
Which brings us to rotary turbos; can handle a lot of boost and a lot of revs, albeit with other issues.I'm not going to get into the engine capacity discussion, but there's a lot of power on offer and little weight.
ylee coyote said:
I am running my saab 2.3 donk at 1.9 bar boost and making 487 hp
This used to be on std internals
It lasted 60 k miles at his boost level (on a 200 k motor...)
but a waterway cracked in the head and I had some oil starvation problems at Cadwell park and the engine was toast
re-built with a forged bottom end now
good for another 500 k....
Impressive.This used to be on std internals
It lasted 60 k miles at his boost level (on a 200 k motor...)
but a waterway cracked in the head and I had some oil starvation problems at Cadwell park and the engine was toast
re-built with a forged bottom end now
good for another 500 k....
option click said:
The twin turbo B5 S4/RS4s are pretty strong.
A lot of people have tuned them to a reliable 600+ bhp on standard internals.
I thought they started lunching their conrods around the 500 lb ft mark? Presuming keeping the power/torque curves roughly similar for aftermarket blowers anyway.A lot of people have tuned them to a reliable 600+ bhp on standard internals.
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