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dyno chart results 

 

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 Post subject: dyno chart results
Posted: Wed Mar 09, 2005 4:06 pm 
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hey all

searching thru the records at home from when i bought the car, i found a dyno chart with the following figures:

speed: 121km/h
power: 172 rwhp
torque: 515
MAP: -0.5
petrol: 10.04

this is an EF Futura, with (at that time) pod filter, mandrel intake, stg 2 crom cam, pacemaker extractors & lukey exhaust.

my question is, specifically what does the MAP represent, and the petrol figure of 10.04 - is this an indication the car is running rich? i have no idea how to read into these figures :? i believe it is, and will be throwing in a malpassi adj fuel pressure regulator - any thoughts on this at all? car will be redyoned, with the following changes: AUIII XR snorkel, K&N panel filter (no more pod), mandrel intake, ported & polished TB.

cheers

 

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Posted: Wed Mar 09, 2005 4:11 pm 
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Fraser - you know my thoughts on the matter, but just to throw my hat in the ring...

Im thinking "BAP" might be an atmospheric adjustment for the dyno calcs.

And "petrol" likely to be AFR, assuming this is plotted on the graph as a static fgiure doesnt really make sense.

 

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Posted: Wed Mar 09, 2005 4:15 pm 
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yep - i figure you're prolly correct on that martin. just an update - had another look - the rwhp on the graph is given as 'corrected power (hp) (DIN)' and the torque on the opp side of the graph is given as 'Torque (Nm)' if that clarifies anything :?

and the petrol/AFR is just a given figure - not plotted on the chart at all...

 

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Posted: Wed Mar 09, 2005 6:16 pm 
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yeh, not the best of graphs

my guess it that the 10.04 was the richest it ran (at wot, the richest you reallty would like it 12.7) and the MAP is the pressure inside your intake, not actually your manifold p[ressure. they stuck a probe down the intake too, must have been a pressure measure thingo

-0.5 is not bad, means there is pretty mucgh no starvage of air at all
0 is a true WOT reading

 

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Posted: Wed Mar 09, 2005 6:18 pm 
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uglybob wrote:
yep - i figure you're prolly correct on that martin. just an update - had another look - the rwhp on the graph is given as 'corrected power (hp) (DIN)' and the torque on the opp side of the graph is given as 'Torque (Nm)' if that clarifies anything :?

and the petrol/AFR is just a given figure - not plotted on the chart at all...


corrected power is a setting which counteracts hot/muggy air and trys to give you a true reading, like with out all the vairables ect...

 

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Posted: Thu Mar 10, 2005 2:02 pm 
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Why are you putting on a malpassi reg?
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Posted: Thu Mar 10, 2005 2:04 pm 
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he want less fuel, tooo rich

 

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Posted: Thu Mar 10, 2005 2:12 pm 
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Wont the reg only increase the fuel...
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Posted: Thu Mar 10, 2005 2:14 pm 
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CHEF wrote:
Wont the reg only increase the fuel...


Remove the stocker and should be able to make it go either way...

 

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Posted: Thu Mar 10, 2005 2:17 pm 
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4.9 EF Futura wrote:
CHEF wrote:
Wont the reg only increase the fuel...


Remove the stocker and should be able to make it go either way...


yeah, what he said

should help with eco and power

 

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Posted: Thu Mar 10, 2005 2:44 pm 
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is the stock reg befor or after the injectors on the rail? Im too lazy to go into the garage and look...
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Posted: Thu Mar 10, 2005 2:49 pm 
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CHEF wrote:
is the stock reg befor or after the injectors on the rail? Im too lazy to go into the garage and look...


It's afer the inj on a V8, I think this is common for all EFI systems.

 

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Posted: Thu Mar 10, 2005 2:54 pm 
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Yep, it holds pressure in... you would have to put it befor the injectors to decrease pressure
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Posted: Thu Mar 10, 2005 3:02 pm 
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it is tho, isnt it?
at the back of the fuel rail? (near no6) ???

 

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Posted: Thu Mar 10, 2005 3:11 pm 
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CHEF wrote:
Yep, it holds pressure in... you would have to put it befor the injectors to decrease pressure


Yeah I see what you mean.

But i would have thought the adjust reg would replace the stock reg (after the injectors) and regulate pressure from there - i.e. let more fuel through the return line than the stock reg, in order to achieve a lower pressure in the fuel rail?

 

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