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UweM3 View Drop Down
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Joined: 11-February-2003
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Points: 5445 		Direct Link To This Post Posted: 20-May-2005 at 10:57
Originally posted by M BLUR M BLUR wrote:


Rubbish m8! That may be true in the case of some operators but not with Gerry at Dastek who are not just RR but also create and supply piggy ecus and dynos to various forms around the country. Their rollers are some of the most frequently calibrated I've come across.




I suggest you read my post again and please tell me where I have said that Gerry has botched up DYNO figure????
We had a GENERAL chat about Dynos and operators....

BTW I still think 249bhp for a standard EVO3 is not possible


Edited by UweM3
E61 520d, slow and buzzy but my wallet likes the mpg.....
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jon90 View Drop Down
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Points: 653 		Direct Link To This Post Posted: 20-May-2005 at 11:00
"Mine with 284/272 and Motec is around 195 @
wheels"

Dave,your cars knackered

I think I would have to agree with Uwe on the E3 figures,but I wouldn`t get to hung up about the numbers,as they are only good for pub banter.

Jon

Edited by jon90
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Points: 1934 		Direct Link To This Post Posted: 21-May-2005 at 17:27

When Gerry visited me, he did say his Dastek dynos are extremely accurate. He can get readings off his dyno, go to another Dastek dyno elsewhere in the country with different atmospheric temps and get identical readings with the same car.

If we were to upgrade, this dyno would probably be our choice.
[IMG]http://i4.photobucket.com/albums/y135/ShepsM3/New-1a1.jpg">[IMG]http://i4.photobucket.com/albums/y135/ShepsM3/New-1b1.jpg">
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Points: 795 		Direct Link To This Post Posted: 22-May-2005 at 15:15
Originally posted by 215DMX 215DMX wrote:

I can't believe after looking at loads of 2.5 plots that
215 with just Motec or 218 with Maxx at the wheels
can be accurate with a standard evo sport engine
with just A/N.

Of the other plots ( I've collected 39 so far) I have
seen that achieve these figures they are running at
least 284/276 shricks and 11.25 + high
compression pistons...    

eg's



284/276 etc




Rich (sport with Motec)




Mine with 284/272 and Motec is around 195 @
wheels


All in my humble opinion of course....


Dave


The "Rich" plot is actually mine. Mapped by Rich!
Sport Evo with Milltek and Motec on Optimax with power runs done in 3rd gear.

The powerstation dyno was calibrated in April this year. And for what it is worth I find it hard to believe that the transmission losses (215@wheels=250@flywheel) of 35bhp are a little small.

Steve


Edited by stevesingo
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Points: 1934 		Direct Link To This Post Posted: 22-May-2005 at 17:34

The transmission losses will be less if the run was done in 3rd gear as the overall speed wasn't as fast as it would be in 4th. Also the ration won't be 1:1 more like 1.2:1 making the engine turn over easier. I usually calculate between 18 and 20% losses in 4th gear. BUT, as I said earlier, these chassis dynos which calculate flywheel power are only calculated by figures being put into the computer by the operator to start with. Some people say that it doesn't matter if you get the readings in 3rd or 4th gear, but actually it does. When I map cars I do it in 3rd as the dyno will be even more sensitive to any adjustments you make, but I use 4th for the initial and final power runs as 4th is normally the "straight through" gear. Mind you looking at that graph...202kmh at 7290 rpm isn't 3rd gear, I would have said that was 4th??

The only real way you can "accurately" measure flywheel power is by removing the engine and bolting it to an engine dyno.

Steve...any news from Chris yet about the bolsters?



Edited by SHEPSM3
[IMG]http://i4.photobucket.com/albums/y135/ShepsM3/New-1a1.jpg">[IMG]http://i4.photobucket.com/albums/y135/ShepsM3/New-1b1.jpg">
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Points: 795 		Direct Link To This Post Posted: 23-May-2005 at 06:18
I thhought 5th was the 1:1 gear on the M3 gearbox?

Shep, PM for you.

Steve
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Points: 1780 		Direct Link To This Post Posted: 23-May-2005 at 07:52
Sorry Steve, I have quite a few dyno charts, yours
obviously didn't get put down right.

Problem sorted.
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Points: 795 		Direct Link To This Post Posted: 23-May-2005 at 14:09
Chhers Dave

Uwe,

Can you add mine for a comparison.

cheers

Steve

Edited by stevesingo
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