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

 

can't see how you're going to get that question answered without providing more info mate.

edit - doh - just seen your sig.

 

how much more air can ur head flow..???.is it at 26 psi for a reason..???

 

its at 32 psi and feels good goes like fuck. ive got a bit of private road 0.8 of a mile with a sharp bend at the start of it and ive had 155 and stopped within this 0.8 mile stretch. dunno what head can flow but even if it was on its limit at 26 psi it must still push a bit more in id of thought with 6 psi more pressure. all i know of head is nms said middle of the road, so 410 standard and 550 for fully ported so if im in the middle should be around 480 ish ?

 

Whatever the results - post the graphs - would be interested to see the power plot

 

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

 

508bhp is my guess!

 

i see what your saying mate torque is down hasnt got the punch my stage 3 saff had but once your over 5500 rpm seem to just rip right to limiter ! and inlet temps from mapping graph are 41 degrees at 7300 rpm and highest peak of inlet temp recorded on secs is 55 degrees.

 

will do mate found somewhere on me doorstep gonna go asap

 

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

 

was the dastek rolling road over reading then mate ?

 

staffi had his dynoed on a dyno dynamics rr, think it was 442Bhp @ Fly and 376 @ wheels.

most people rate the DD RR very highly.

Steve.

 

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.............????

 

the ones im gonna be going on are hofmann dynatest had any experience of them ?

 

it would be nice mate hopefully a bit closer to the magical 500 now anyway

 

My guess is 463bhp, dont ask me why just like the number

 

....no mate, the only thing i can advise is watch what boost its pulling on the rollers and where in the rev range....if it dosnt match what it does on the road how can it be right....i've done 2 R/R days and this hasnt happened........

 

Mine made 486 @ 26psi and 562 @ 31psi

 

thats some awesome figures mate

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

 

I'll go 464bhp then!

 

well 442/26 = 17bhp per psi

so 32x17 = 544bhp

trust me i'm an engineer

 

would be wicked mate my head and inlet are gonna be limiting factors hopefully get more than 442 though

 

So when is the car booked in then mate?

 

i am going up to light blues and the advice from my tuner is to stay with t43 .48 as i do not know my c/r should be fine for a steet car

 

i recon 0bhp as it will blow up on the rollers only messing

 

 

not booked in yet. im off work sick today so phoned local rollers to try and get in today but aint heard back yet

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

 

The absolutely only why you can make a like for like comparison to see what the increase in boost has given, is to go back to Noble's. If you record a figure on a different type of rolling road, you might as well have just guessed the difference .

 

maybe go to someone who uses the same rollers. anyone know what rollers nobles use ?

 

It will probably be more power at 32, but you cant guarentee that.

 

correct