se5a Rolling Road Graph

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housemartin
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se5a Rolling Road Graph

Post by housemartin » Mon Jan 15, 2018 8:31 pm

BigBobPilot wrote:
Wed Dec 20, 2017 12:54 am
Why does the graph stop at 4250 rpm Dan? It's a long way from the red line unless it's a diesel...

Did the rolling road operator back off because the power dropped off or due to the fuelling? If it's the fuelling it needs sorting so you don't lean it out and start melting pistons. I learned the hard way, in the middle of France in my old Scim.
Ben, I asked the tester to back off at 5000rpm or if the powers started to drop off.

After looking at the above run the tester put a wide band lamda sensor in the exhaust and the reading rose up to 13 as it past 4000rpm, so yes it had fuelling problems at higher revs. He suggested replacing the mechanical pump with an electrical pump as a first step before changing anything like the air correction jets or float levels.

The scimitar was up to 90mph at 4000rpm on the rollers, so not a problem in this country.

I will get the engine back on the rollers in the summer after I have added an electric fuel pump and sorted other more pressing issues such as leaks and draughts inside the car. It is now a lots more pleasing to drive as the timing was tweeked, carbs balanced before the run and most importantly starts easily even in the cold weather. I just play safe and change up before 4000rpm.

Dan



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Post by Diyhell » Mon Jan 15, 2018 11:16 pm

OK, the combined story so far...on my laptop you need to click on the pic to see it all.

Keep them coming!
Essex V6 power dynos 15.1.18.jpg
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SE6a needing lots of work...

David Lanceley
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se5a Rolling Road Graph

Post by David Lanceley » Tue Jan 16, 2018 2:10 pm

and mine...
Power Aug 2015.pdf
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Current;
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Post by Diyhell » Wed Jan 17, 2018 10:06 pm

Updated with David Lanceley,
Essex V6 power 17.1.18.jpg
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SE6a needing lots of work...

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Post by Diyhell » Fri Jan 19, 2018 9:52 pm

Now with added turboscim,
Essex V6 power 19.1.18.jpg
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SE6a needing lots of work...

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Post by Coupe Racing » Tue Jan 23, 2018 6:41 pm

This was without a decent air box and very small tubular manifolds that robbed some power.

The man at Aldon didnt want to take it over 7500 :shock:
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Post by Diyhell » Wed Jan 24, 2018 9:13 pm

And with Coupe Racing, added
Essex V6 power 24.1.18.jpg
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SE6a needing lots of work...

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Post by Diyhell » Mon Jan 29, 2018 2:05 pm

Any more dyno graphs out there?


SE6a needing lots of work...

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se5a Rolling Road Graph

Post by philhoward » Mon Jan 29, 2018 2:17 pm

Not really relevant as it's not an Essex but a Vauxhall 3.0:
philhoward wrote:
Mon Oct 07, 2013 8:37 am
Just for reference - from the dyno at Curborough:
Image

Image
Ignore the funny dip in the middle - it had a sticky valve on the ramair system.It should be (and now is) a straight line between 3200 and 4800rpm.. Rev limit at 6750. 212.7bhp is corrected flywheel, 171.2 is at the wheels.


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