VF23
#2
Originally Posted by banny sti
How much power could you extract from a standard VF23 with the right mods?
source http://www.scoobytuner.com/tuning/?tSfID1=4&tuningID=43
I can to some extent verify this having run 298 bhp at 1.3 bar a year or so back with a completely standard set up (bar panel filter)...
Last edited by dr_jones; 05 December 2004 at 07:57 PM.
#3
with supporting mods such as filter, full exhaust including de-cat, larger injectors, uprated fuel pump, boost controller, air/fuel controller and a front mount intercooler could i achieve 330bhp to 350 bhp? how much difference could i expect from adding a apexi power fc to the above?
Originally Posted by dr_jones
I have one of these (V3 Sti) and apparently "The VF23 starts the middle ground. It comes on boost around 3100 rpm and is capable of running 20 psi of boost. Expect to max out the VF23 somewhere in the 300-350 hp range"
source http://www.scoobytuner.com/tuning/?tSfID1=4&tuningID=43
I can to some extent verify this having run 298 bhp at 1.3 bar a year or so back with a completely standard set up (bar panel filter)...
source http://www.scoobytuner.com/tuning/?tSfID1=4&tuningID=43
I can to some extent verify this having run 298 bhp at 1.3 bar a year or so back with a completely standard set up (bar panel filter)...
#4
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Originally Posted by dr_jones
I have one of these (V3 Sti) and apparently "The VF23 starts the middle ground. It comes on boost around 3100 rpm and is capable of running 20 psi of boost. Expect to max out the VF23 somewhere in the 300-350 hp range"
source http://www.scoobytuner.com/tuning/?tSfID1=4&tuningID=43
I can to some extent verify this having run 298 bhp at 1.3 bar a year or so back with a completely standard set up (bar panel filter)...
source http://www.scoobytuner.com/tuning/?tSfID1=4&tuningID=43
I can to some extent verify this having run 298 bhp at 1.3 bar a year or so back with a completely standard set up (bar panel filter)...
#5
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Originally Posted by scooby-si
iam running 27psi on mine and ill be around 340bhp 370torque on a 2.2ltr but ive got a lot more bits and bobs on there,putting a td05/6 on next
i fried one trying to run 1.45 bar midrange (about 21psi)
i run my current one @ 1.37/8bar midrange which is the max rated safe power for the turbo (according to the flow charts i got from john)
i belive mine should be about 330bhp and 300lbft
#6
Originally Posted by banny sti
with supporting mods such as filter, full exhaust including de-cat, larger injectors, uprated fuel pump, boost controller, air/fuel controller and a front mount intercooler could i achieve 330bhp to 350 bhp? how much difference could i expect from adding a apexi power fc to the above?
#7
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Originally Posted by StickyMicky
how many miles have you ran it @ 27psi?
i fried one trying to run 1.45 bar midrange (about 21psi)
i run my current one @ 1.37/8bar midrange which is the max rated safe power for the turbo (according to the flow charts i got from john)
i belive mine should be about 330bhp and 300lbft
i fried one trying to run 1.45 bar midrange (about 21psi)
i run my current one @ 1.37/8bar midrange which is the max rated safe power for the turbo (according to the flow charts i got from john)
i belive mine should be about 330bhp and 300lbft
but ive been running that for 15 months about 11k
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Originally Posted by StickyMicky
how can it hold 22/23 psi at the redline?
simon
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You've got a strong one then, I've heard of a few exploding at 20 PSI.
I would, and have happily had TD series turbos boosting to 25-27 PSI, but a VF Even my hybrid blew up when given 22 PSI.
I would, and have happily had TD series turbos boosting to 25-27 PSI, but a VF Even my hybrid blew up when given 22 PSI.
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Originally Posted by john banks
You've got a strong one then, I've heard of a few exploding at 20 PSI.
I would, and have happily had TD series turbos boosting to 25-27 PSI, but a VF Even my hybrid blew up when given 22 PSI.
I would, and have happily had TD series turbos boosting to 25-27 PSI, but a VF Even my hybrid blew up when given 22 PSI.
john and it takes my anti lag as well just had the down pipe off on sunday and theres no play in there at all
#13
what would be the best front mount intercooler to go for? something like a HKS or universal one with a core size of about 600mm?
Originally Posted by scooby-si
john and it takes my anti lag as well just had the down pipe off on sunday and theres no play in there at all
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Dave, you heard right then In my early days of tuning we had an unlimited cheap supply of VF23's - we just assumed it was normal for compressor wheels to fail if you went above 1.4 bar.
Then I fitted a td05 and realised the VF23 was just a weak piece of crud. I believe the VF22 was, if anything, even weaker on the compressor side. To the VF series credit, the vf34 is very nice and we've not broken one yet
Worth noting that a failed VF23 (compressor wheel broken, but bearing still OK) is a very nice candidate for a KKK RS2 compressor wheel. Not much machining required to fit, doesn't fail anymore (not run it past 1.45 bar though) and better power output (doesn't spool quite as early).
Then I fitted a td05 and realised the VF23 was just a weak piece of crud. I believe the VF22 was, if anything, even weaker on the compressor side. To the VF series credit, the vf34 is very nice and we've not broken one yet
Worth noting that a failed VF23 (compressor wheel broken, but bearing still OK) is a very nice candidate for a KKK RS2 compressor wheel. Not much machining required to fit, doesn't fail anymore (not run it past 1.45 bar though) and better power output (doesn't spool quite as early).
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Originally Posted by banny sti
what turbos would be a bolt on replacement for a vf23 capable of producing 400bhp?
#18
Richard,
So I've done at least one thing right then cool
I didn't want to push it as its always been a bit noisy (when you switch off the engine you can hear it slow down).
Dave.
So I've done at least one thing right then cool
I didn't want to push it as its always been a bit noisy (when you switch off the engine you can hear it slow down).
Dave.
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Originally Posted by dowser
Worth noting that a failed VF23 (compressor wheel broken, but bearing still OK) is a very nice candidate for a KKK RS2 compressor wheel. Not much machining required to fit, doesn't fail anymore (not run it past 1.45 bar though) and better power output (doesn't spool quite as early).
approx extra power output?
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Dave - you need to really worry when you hear it as it's spooling, means a broken blade!
Sticky - not sure, KKK are the manufacturer of the turbo, can check with the builder if you're interested. Compressor cover needs machining. Car was running stock fuel pressure/injectors, so was limited to around 1.1 bar at the redline. Major difference was the mid-range, was a while ago and don't want to guess figures.
Richard
Sticky - not sure, KKK are the manufacturer of the turbo, can check with the builder if you're interested. Compressor cover needs machining. Car was running stock fuel pressure/injectors, so was limited to around 1.1 bar at the redline. Major difference was the mid-range, was a while ago and don't want to guess figures.
Richard
#21
Richard,
Cheers for the advice, not too worried at the moment as its been like that since I bought the car (16k miles ago). I'll source a replacement early next year anyway, don't really want to be looking for bits of turbo blade in the intercooler etc..
Dave.
Cheers for the advice, not too worried at the moment as its been like that since I bought the car (16k miles ago). I'll source a replacement early next year anyway, don't really want to be looking for bits of turbo blade in the intercooler etc..
Dave.
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