382.8bhp from a VF35 :)
13 October 2010, 08:04 PM
#481
Hang on mate, i too am waiting for Big 'D' to post his results, not because i don't believe him but because he deerves them. he's been personally attacked on here when the most he could be accused of is over enthusiasm (but with a 382 result from a VF35 who wouldn't be). He never made it personal (read his posts) he was ready to accept he could have it wrong and even this morning he was holding out the olive branch when harvey was firing a 12 bore at him. We've all had a bit of fun with this but i wouldn't fancy going toe to toe on a technical issue with harvey, even if i knew i was right! Big 'D' stood his ground and fought his corner with alot of dignity. credit where credit is due.
13 October 2010, 08:06 PM
#482
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Although that is only what I assess as being said in the last 14 pages.....
13 October 2010, 08:09 PM
#484
Dyno Dynamics own figure on AT ie. Air Temperature is 2.73% per 10 degrees.
I don't work on air temperature but I do monitor and log air charge temperatures and every 4 degrees C. on a petrol turbo charged engine approximates to 1% power. That is not my figure but rule of thumb provided by experts of considerable standing and a figure that generally holds true on all the work I do.
Regardless of what anybody else says the original graph was seriously flawed as any competant DD rolling road operator will tell you.
I don't work on air temperature but I do monitor and log air charge temperatures and every 4 degrees C. on a petrol turbo charged engine approximates to 1% power. That is not my figure but rule of thumb provided by experts of considerable standing and a figure that generally holds true on all the work I do.
Regardless of what anybody else says the original graph was seriously flawed as any competant DD rolling road operator will tell you.
13 October 2010, 08:18 PM
#486
Actually I did listen about the IT and AT, what I dont understand is why the intake temp I got could not be correct and why it was totally not possible for what I was doing to work ie the VF35 on my car making 380+bhp.
With my intake temps being high, the corrected figure bhp will be higher.
Cheers Iain
With my intake temps being high, the corrected figure bhp will be higher.
Cheers Iain
At least we have provided amusement for a few people for half a week.
13 October 2010, 08:18 PM
#487
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By all means ask!! 
Tell me what tyres you are using, how much pressure you have and what type of roller, the amount of knurling still on it and number of rollers and I will give you an accurate estimated stab in the dark %, after I have cross referenced tyre deformation!
A hub figure output will normally be lower than wheel output, but is a very good way of measuring higher torque/power cars as you do not have to worry about any potential tyre slip/grip issues.
Basically... if you are comparing figures it is always best to use the same venue each time for any meaningful comparison amongst the plethora of dyno "comparisons".
Tell me what tyres you are using, how much pressure you have and what type of roller, the amount of knurling still on it and number of rollers and I will give you an accurate estimated stab in the dark %, after I have cross referenced tyre deformation!
A hub figure output will normally be lower than wheel output, but is a very good way of measuring higher torque/power cars as you do not have to worry about any potential tyre slip/grip issues.
Basically... if you are comparing figures it is always best to use the same venue each time for any meaningful comparison amongst the plethora of dyno "comparisons".
Thats a whole load of info to take into consideration. It seems a bit of a dark art!!
Was wondering if you take the wheel power would that somewhat eliminate the variable of IT/AT etc or do they still apply regardless.
Even though the power would be lower through transmisson loss, would it represent a more 'real world' figure?
13 October 2010, 08:21 PM
#488
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There is no point posting the graphs up as some people minds are already made up without even knowing me, the car or being at the dyno, its only flawed because you can't accept the figures.
Cheets Iain
Cheets Iain
13 October 2010, 08:24 PM
#489
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13 October 2010, 08:27 PM
#491
I havn't read the whole thread but I have more important things to do now.
13 October 2010, 08:28 PM
#492
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If anyone feels so strongly about contesting my results please feel free to speak to Bob or Len as they both have first hand experience with the car and you may just listen to them lol.
Cheers Iain.
Cheers Iain.
13 October 2010, 08:33 PM
#494
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You really don't understand and this has now moved from being silly to a complete farce. A bit like the blind leading the blind but I am not sure whether Lewak is in front or behind you, presumably behind according to previous posts.
At least we have provided amusement for a few people for half a week.
At least we have provided amusement for a few people for half a week.
stop talking down to people like they are complete idiots
13 October 2010, 08:33 PM
#495
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Sorry Benno but you have completely missed the point and do not understand what you are talking about. Indeed the problem with the 382.8 rolling road graph posted in the first place is so basic I am astounded by the lack of common sense and knowledge some of you guys deomonstrate.
Lewak is a different story, he deserves everything he gets.
13 October 2010, 08:41 PM
#496
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So true. It confuses me why some people will trawl all over, using various RR's just to get a magic number.As stated many times there a loads of variants, IMO pick the one closest to you, or the rollers/operator you prefer and stick with it. That's the only way you can really(with in reason) tell if a modification has made a difference, be it good or bad.
13 October 2010, 08:49 PM
#497
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Harvey there are two types of people on this thread those who know and those who ware learning, i fall squarely into the latter. I have enjoyed the knowledge as well as the banter in equal measure and at no time have agreed or disagreed with both yourself or Big 'D'. The odds that i gave are probably the clearest indication of my initial thoughts ie 5/1 for 380+.I would suspect the vast majority on here thought that something was wrong with a 382bhp figure nevermind the AT, IT figures. Personally i just thought you came down a bit hard on him, no more, no less.
Lewak is a different story, he deserves everything he gets.
Lewak is a different story, he deserves everything he gets.
Oh thank you very much Benno
13 October 2010, 08:52 PM
#498
I understand the rationale that at 44deg IT the 380hp the RR is putting out is likely to be an overly compensated guestimate but when the IT drops to 33deg why is the RR still putting out this overly compensated guestimate of 380hp, shouldn't it be tending more towards an actual which would of course be lower. At what point would the RR stop overly compensating, when the AT and IT were close to parity?
13 October 2010, 08:55 PM
#499
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An awesome result for a qualified aircraft technician hey Iain? I would hate to think what you would be able to do to a car if you had studied motor mechanics and not aircrafts.
Well done mate.
Well done mate.
13 October 2010, 09:11 PM
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13 October 2010, 09:13 PM
#504
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Oh really?? Sorry fella both are out of my league. I know you can turn an old turbo into a jet engine and not seen someone turn a old jet turbine into a turbo so thought turbines were way more technical than turbo's hahahah. Watch this...
http://www.youtube.com/watch?v=l-spt7y1v6Y
http://www.youtube.com/watch?v=l-spt7y1v6Y
13 October 2010, 09:13 PM
#505
412/425 of forged love
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Banny i see you rounded up in your avatar 
Can someone confirm this also?
If the IT drops down from original 44 to 33 2nd run, shouldnt the bhp change?
I thought i was getting it but the last few pages got complicated lol
If the IT drops down from original 44 to 33 2nd run, shouldnt the bhp change?
I thought i was getting it but the last few pages got complicated lol
13 October 2010, 10:03 PM
#507
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Still no graphs. Well theres a surprise. I would like to see the graph big d, Come on get it up to we compare the characters of both graphs.. I thought you would of had it up straight away if its made 382.9..
13 October 2010, 10:11 PM
#508
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so the at, it. what should they be
checked my last read out on my car, it was: at-27 & it-29 and got 341.4 @ 1.4bar boost.
whats the significans of these.
as aboth, was following it all. mine to was at surryrolling road
just want to know, for future threads
checked my last read out on my car, it was: at-27 & it-29 and got 341.4 @ 1.4bar boost.
whats the significans of these.
as aboth, was following it all. mine to was at surryrolling road
just want to know, for future threads
Last edited by dabow; 13 October 2010 at 10:14 PM.
13 October 2010, 10:19 PM
#510
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I'd like to see a typical VF35 turbo WHP figure for this kind of dyno(ideally the same dyno), compared to the WHP figure of this car. My guess(educated) is a typical VF35 will post somewhere in the region of 260-280WHP