442 bhp at 26 psi what would 32 psi be ?
03-10-2007, 03:24 PM
#1
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442 bhp at 26 psi what would 32 psi be ?
just spoke to alan previous owner of my car turns out when my car was rolling roaded last it was running 26 psi not 30 and it made 442 fly bhp. its now running 32 psi and more ignition advance full msd live map anyone any idea what power it will be now ? going on rollers in bout 3 weeks hopefully just wondered peoples thoughts 
thanks
thanks
03-10-2007, 04:01 PM
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Originally Posted by pete mcrash
how much more air can ur head flow..???.is it at 26 psi for a reason..???
03-10-2007, 04:16 PM
#6
just finding my feet
sometimes you can ad more boost but the engine not cunsume the air is what the blokes getting at
you can have 32psi and slow the car down i belive, stavros or chip will confirm if im talking shite im sure but thats how i understand it
psi is presure not flow, when you are increasing the presure but the head aint consuming your presure will still increase aswell as temps but the engine wont actually be getting much more air inside it
my engine was holding 27psi to the limiter but maxed out the greens and was running a little lean after 6300rpm in 4th and 5900rpm in 5th gear as it was consuming the air meaning that i the 27psi was alot more air than say 27psi on a head that aint flowing the air
sorry im shite at explaining things but if your injectors are flowing more fuel for a small amount of boost they the engines working better
big big boost engines dont mean better engines for more power/top speed
though i belive you will loose low down torque or something like that
infact ignore me and PM stavros as thats what he knows about
you can have 32psi and slow the car down i belive, stavros or chip will confirm if im talking shite im sure but thats how i understand it
psi is presure not flow, when you are increasing the presure but the head aint consuming your presure will still increase aswell as temps but the engine wont actually be getting much more air inside it
my engine was holding 27psi to the limiter but maxed out the greens and was running a little lean after 6300rpm in 4th and 5900rpm in 5th gear as it was consuming the air meaning that i the 27psi was alot more air than say 27psi on a head that aint flowing the air
sorry im shite at explaining things but if your injectors are flowing more fuel for a small amount of boost they the engines working better
big big boost engines dont mean better engines for more power/top speed
though i belive you will loose low down torque or something like that
infact ignore me and PM stavros as thats what he knows about
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03-10-2007, 04:38 PM
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Originally Posted by Ginge !
sometimes you can ad more boost but the engine not cunsume the air is what the blokes getting at
you can have 32psi and slow the car down i belive, stavros or chip will confirm if im talking shite im sure but thats how i understand it
psi is presure not flow, when you are increasing the presure but the head aint consuming your presure will still increase aswell as temps but the engine wont actually be getting much more air inside it
my engine was holding 27psi to the limiter but maxed out the greens and was running a little lean after 6300rpm in 4th and 5900rpm in 5th gear as it was consuming the air meaning that i the 27psi was alot more air than say 27psi on a head that aint flowing the air
sorry im shite at explaining things but if your injectors are flowing more fuel for a small amount of boost they the engines working better
big big boost engines dont mean better engines for more power/top speed
though i belive you will loose low down torque or something like that
infact ignore me and PM stavros as thats what he knows about
you can have 32psi and slow the car down i belive, stavros or chip will confirm if im talking shite im sure but thats how i understand it
psi is presure not flow, when you are increasing the presure but the head aint consuming your presure will still increase aswell as temps but the engine wont actually be getting much more air inside it
my engine was holding 27psi to the limiter but maxed out the greens and was running a little lean after 6300rpm in 4th and 5900rpm in 5th gear as it was consuming the air meaning that i the 27psi was alot more air than say 27psi on a head that aint flowing the air
sorry im shite at explaining things but if your injectors are flowing more fuel for a small amount of boost they the engines working better
big big boost engines dont mean better engines for more power/top speed
though i belive you will loose low down torque or something like that
infact ignore me and PM stavros as thats what he knows about
03-10-2007, 07:05 PM
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Originally Posted by Big Will 85
Whatever the results - post the graphs - would be interested to see the power plot 
03-10-2007, 07:21 PM
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Originally Posted by col cos1
mine made 456bhp at crank on dastek rolling road at 25 psi
and 373bhp at wheels at ava at 30psi
your on simaler spec to mine and i reckon mine to ge around the 420bhp mark
and 373bhp at wheels at ava at 30psi
your on simaler spec to mine and i reckon mine to ge around the 420bhp mark
03-10-2007, 07:25 PM
#12
Originally Posted by col cos1
mine made 456bhp at crank on dastek rolling road at 25 psi
and 373bhp at wheels at ava at 30psi
your on simaler spec to mine and i reckon mine to ge around the 420bhp mark
and 373bhp at wheels at ava at 30psi
your on simaler spec to mine and i reckon mine to ge around the 420bhp mark
most people rate the DD RR very highly.
Steve.
03-10-2007, 07:33 PM
#13
saff is working!!!...atm
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i was at a R/R day on Dastek rollers,they said they were accurate up to +/- 1bhp...................................what they didnt say was if the operators knew how to use them.............????
03-10-2007, 07:36 PM
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Originally Posted by pete mcrash
i was at a R/R day on Dastek rollers,they said they were accurate up to +/- 1bhp...................................what they didnt say was if the operators knew how to use them.............????
04-10-2007, 05:35 AM
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saff is working!!!...atm
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Originally Posted by scoooby slayer
Originally Posted by pete mcrash
i was at a R/R day on Dastek rollers,they said they were accurate up to +/- 1bhp...................................what they didnt say was if the operators knew how to use them.............????
04-10-2007, 10:36 AM
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Originally Posted by dingy
Mine made 486 @ 26psi and 562 @ 31psi
im off sick today phoned 1320 rolllers down the road hopefully i can get down there today and get a figure.
your car must fly
04-10-2007, 11:22 AM
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Originally Posted by gingeRS
well 442/26 = 17bhp per psi 
so 32x17 = 544bhp
trust me i'm an engineer
so 32x17 = 544bhp
trust me i'm an engineer
04-10-2007, 12:11 PM
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Originally Posted by Dan
So when is the car booked in then mate?
from all the feedback im getting from another post the only way im gonna know how much ive gained is if it goes back to nobles rollers again where it was done the last time. im not bothered about just knowing the figure its fast as fuck so dont really matter but would like to know how much hp its gained with the extra 6 psi and ignition. what im hearing is different rollers are vastly different so im not gona know am i
04-10-2007, 01:18 PM
#28
Originally Posted by scoooby slayer
Originally Posted by Dan
So when is the car booked in then mate?
from all the feedback im getting from another post the only way im gonna know how much ive gained is if it goes back to nobles rollers again where it was done the last time. im not bothered about just knowing the figure its fast as fuck so dont really matter but would like to know how much hp its gained with the extra 6 psi and ignition. what im hearing is different rollers are vastly different so im not gona know am i
.
04-10-2007, 05:39 PM
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Originally Posted by Mike Rainbird
Originally Posted by scoooby slayer
Originally Posted by Dan
So when is the car booked in then mate?
from all the feedback im getting from another post the only way im gonna know how much ive gained is if it goes back to nobles rollers again where it was done the last time. im not bothered about just knowing the figure its fast as fuck so dont really matter but would like to know how much hp its gained with the extra 6 psi and ignition. what im hearing is different rollers are vastly different so im not gona know am i
.
04-10-2007, 07:13 PM
#31
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Originally Posted by scoooby slayer
from all the feedback im getting from another post the only way im gonna know how much ive gained is if it goes back to nobles rollers again where it was done the last time. im not bothered about just knowing the figure its fast as fuck so dont really matter but would like to know how much hp its gained with the extra 6 psi and ignition. what im hearing is different rollers are vastly different so im not gona know am i
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