2007 Noble M400 Dyno Results
Discussion
Through the generosity and logistical planning of Potomac Cafe Racers and Maryland Performance Center, I had the opportunity to dyno my new (to me) 2007 Noble M400. Enclosed are the results. There was quite a difference between the 4th gear (RED) and 5th gear (BLUE) results. The 4th gear run was done first if intake air temp from one run to the other could be considered a factor. There was no air running specifically over the intercooler.
Are these typical results?
Are these typical results?
andygtt said:
the stock intercooler does heat soak quite quickly and the ecu backs things out, does look like thats whats happened.
Power seems normal as thats wheel and Im told by those that have dyno'd them at the M400's usually make 410ish.
I thought they made 370ish at the crank, Noble put high boost maps in some but they suffered valve float very quickly (like mine) Noble claimed 425, the Roush built engines for the M15 were much better, the 1g cars used AER built engines so different again.Power seems normal as thats wheel and Im told by those that have dyno'd them at the M400's usually make 410ish.
As you are one of the people I know has dyno'd his M400 and seen others done I stand corrected 
... I remember they were well down on the 420bhp claimed, but thats more than I thought.
So the M400 only made 20-30bhp more than the GT03?
I remember valve bounce was the reason my stock engine couldn't make more than 390bhp.
... I remember they were well down on the 420bhp claimed, but thats more than I thought.So the M400 only made 20-30bhp more than the GT03?
I remember valve bounce was the reason my stock engine couldn't make more than 390bhp.
RossoDiamante said:
Is it reasonable to assume a 15% loss through the drivetrain?
Is valve float cured with different springs?
15% seems to be the industry accepted... I certainly think 15% is the absolute max for losses on our car.Is valve float cured with different springs?
Stiffer springs cure the valve float even to over 8000rpm that I run, available from piper for around £250
RossoDiamante said:
Are you still making good power up there? My engine is pooping out above 6500 RPM.
Yes I make close to twice what you do from 6-8000rpm and it would hold power after 8000rpm if i let it rev much past there... but then my engine is very heavily modified in order to do that and make the power.Your red power band looks strong for a stock M400.
If I remember correctly?
Trevor ie Yellowshed on here
Recomended me to change valve springs and injectors, of which Bespoke supplied for me, we made 440 on my 2005 M400 thats nearly 6 Years ago. A better intercooler is a must really to keep air charge temps down. Which will help .
My first power run when I bought the
Car only gave 330, thats what started me on my journey of improvement and power with reliabilty
Trevor ie Yellowshed on here
Recomended me to change valve springs and injectors, of which Bespoke supplied for me, we made 440 on my 2005 M400 thats nearly 6 Years ago. A better intercooler is a must really to keep air charge temps down. Which will help .
My first power run when I bought the
Car only gave 330, thats what started me on my journey of improvement and power with reliabilty
andygtt said:
Yes I make close to twice what you do from 6-8000rpm and it would hold power after 8000rpm if i let it rev much past there... but then my engine is very heavily modified in order to do that and make the power.
Your red power band looks strong for a stock M400.
Not fully understanding dyno subtleties, they ran my car in 2 different gears (4th then 5th). Why would you choose one vs. the other? What gear are others testing their cars in? What sort of difference should I expect between the results of 4th and 5th gears?Your red power band looks strong for a stock M400.
Not sure if this is of interest or adds to the post (its a bit beyond me) but here are my Dyno results on a 3R (carried out by Noble Motorsport). Power was increased from 354bhp to 415bhp. This was done in 2011 with 22,223 miles on the clock. The car has now done 45,000 and not suffered any ill effects since (new clutch at 43,000 but that might be expected anyway?). Have I simply been lucky as regards valve float?!
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