390 lbs/ft torque from a vf34?
30 January 2010, 01:24 PM
#1
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390 lbs/ft torque from a vf34?
Hi guys got back from [the racing line] after haveing the car mapped the results were 350hp/390lbs
just wondering if anyone else has seen a vf34 give that much torque as i only see around 350/350
mods
gems ecu
fmic
inducion k&n
full H&S exhaust
gt spec headers/uppipe
740 inj
forge actuator
forged 2.0l built be ZEN
will post printout up [membership]
just wondering if anyone else has seen a vf34 give that much torque as i only see around 350/350
mods
gems ecu
fmic
inducion k&n
full H&S exhaust
gt spec headers/uppipe
740 inj
forge actuator
forged 2.0l built be ZEN
will post printout up [membership]
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30 January 2010, 03:00 PM
#8
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At that kind of boost level I don't doubt it for a minute, I have seen 360lbft from 1.4 bar on a stock motor, so with forged internals and good boost no reason why not.
30 January 2010, 03:58 PM
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compared it to the graph u posted in vf34 output thred
whats this fud factor on rolling road i keep hearing about? some are 22 and some are 24? or do some read high and some low? matt at trl is 22
whats this fud factor on rolling road i keep hearing about? some are 22 and some are 24? or do some read high and some low? matt at trl is 22
30 January 2010, 05:56 PM
#11
Yeah as MJ says, it's that larger-than-typical boost level (for a VF34) of 1.7bar that's netting you that peak 390lb ft. If your motor's built to take it, then fantastic!
How much of the rev band is that 390lb ft spread over though? It's prob quite narrow... so, roughly, what's the average lb ft figure that's spread over the largest part of the rev band (the important thing for the road)?
How much of the rev band is that 390lb ft spread over though? It's prob quite narrow... so, roughly, what's the average lb ft figure that's spread over the largest part of the rev band (the important thing for the road)?
Last edited by joz8968; 30 January 2010 at 06:02 PM.
30 January 2010, 06:41 PM
#12
Yeah as MJ says, it's that larger-than-typical boost level (for a VF34) of 1.7bar that's netting you that peak 390lb ft. If your motor's built to take it, then fantastic!
How much of the rev band is that 390lb ft spread over though? It's prob quite narrow... so, roughly, what's the average lb ft figure that's spread over the largest part of the rev band (the important thing for the road)?
How much of the rev band is that 390lb ft spread over though? It's prob quite narrow... so, roughly, what's the average lb ft figure that's spread over the largest part of the rev band (the important thing for the road)?
30 January 2010, 08:31 PM
#16
im assuming the op is well aware of the gearbox poss probs at this level.defo great result tho!!! and i was worried of running 350lbft????
30 January 2010, 09:43 PM
#20
here we go again.
......many have broke well under 400lbft,i wonder how many people running 350-400lbft have had the gearbox last for a long time?and how many have broke at this level?im with the understanding that 350 will be about tops.
30 January 2010, 09:57 PM
#21
The box's age, and therefore its wear to date, will add to the factors too.
I suspect a c.<75k mile MY99/00 TY754 8-bolter, if previously treated symapthatically, could last a while at under 400lb ft. Assuming NO launches/changing gear like a dick...
I suspect a c.<75k mile MY99/00 TY754 8-bolter, if previously treated symapthatically, could last a while at under 400lb ft. Assuming NO launches/changing gear like a dick...
Last edited by joz8968; 30 January 2010 at 09:59 PM.
30 January 2010, 10:02 PM
#22
30 January 2010, 10:26 PM
#23
Well, the teeth of the gearsets would probably be significantly rounded off through general wear (double the wear! in this example) - thus presenting much less area for engagement. So you're asking a lot of torque to be transferred through smaller surface contact areas.... Go figure.
Last edited by joz8968; 30 January 2010 at 10:28 PM.
30 January 2010, 10:42 PM
#24
I'm running a VF22 and recently made 326bhp. Engine is from an sti ra and is fully forged though.
And yes, I know the gearbox will need to be updated very soon.
And yes, I know the gearbox will need to be updated very soon.
Last edited by Beastra; 31 January 2010 at 12:26 AM. Reason: Post edited as I'm a numty
30 January 2010, 11:15 PM
#26
