Cold air intake box

[Alphabettispaghetti]

Agree. would be good to see a lambda plot with that.
it doesn't look right.

I hate Dyno printouts without A/F

it doesn’t look like it’s out of ‘cam’ with that cam I’ve calculated peak at about 6800-7000. So something else is maxed.

 

[SeanDezart]

That’s a nice curve upto 6000rpm. What’s the static compression ratio? Are you sure it’s your injectors aren’t at max duty cycle?

11:1

I don't know on the injectors - I'm emailed Jenvey with the info and asked for their thoughts.

I can ask for the lambda plot - not sure he has that printed out...

What wasn't helping were the foam air filters that were getting sucked into the trumpets and making the mixture rich at the top end so on the French graph, you'll see :

sans FA = without air-filters (pink) with engine cool and cooler air
Avec FA = with air-filters (light blue)
Test20 = without air-filters, later run with engine warm with warm air

The engine tends to run more hot than warm - something else to check out.

 

[SeanDezart]

it doesn’t look like it’s out of ‘cam’ with that cam I’ve calculated peak at about 6800-7000. So something else is maxed.

Yep, I expected the cam to peak at that too. Going to check the camshaft anyway tomorrow if only to discount it.

I don't know the max capacity of the injectors (yet).

 

[jonbills]

11:1

I don't know on the injectors - I'm emailed Jenvey with the info and asked for their thoughts.

I can ask for the lambda plot - not sure he has that printed out...

What wasn't helping were the foam air filters that were getting sucked into the trumpets and making the mixture rich at the top end so on the French graph, you'll see :

sans FA = without air-filters (pink) with engine cool and cooler air
Avec FA = with air-filters (light blue)
Test20 = without air-filters, later run with engine warm with warm air

The engine tends to run more hot than warm - something else to check out.

So no airbox here? it's bare trumpets, with or without foam filters?

Did the technician check that the throttles were opening fully?
I think 3/4 throttle might go like that.

 

[Alphabettispaghetti]

So no airbox here? it's bare trumpets, with or without foam filters?

Did the technician check that the throttles were opening fully?
I think 3/4 throttle might go like that.

also is it timed ‘properly’?

it’s looks healthy to that point.

 

[Alphabettispaghetti]

On peters he’s making the same power with 1200ish rpm less, so something needs a tweak.

 

[SeanDezart]

So no airbox here? it's bare trumpets, with or without foam filters?

Did the technician check that the throttles were opening fully?I think 3/4 throttle might go like that.

I don't know - I wasn't there.

As is now.

The cold-air intake is going to evolve to be of either 120mm diameter or oval within the rad support panel with a cone filter in front leaving via a 12mm diameter pipe to the biggest airbox we can fit - the engine ought to have a 30ltr box, 10x the engine cc or 5ltrs per cylinder. Going to see about that tomorrow as one of the racing Zs is going down that path so we'll partner up and have some made. Also some heat-sheilding to keep ALL warm air away from the intake both faces of the rad.

 

[SeanDezart]

also is it timed ‘properly’?

it’s looks healthy to that point.

He tried it up to 26° at which point it pinked so set it more 'confortably' at 22.

 

[Alphabettispaghetti]

He tried it up to 26° at which point it pinked so set it more 'confortably' at 22.

Isn’t that low? Is the timing off?

 

[jonbills]

22 is well low. 32-35 should be more like it. What head is it? one of the open chamber heads will pink at 11:1 CR.

 

[SeanDezart]

Guys, I don't know on the timing but one of the points I'll be comparing with the racing team tomorrow.

F54 block, P90 head.

 

[jonbills]

Same as me then. I've got no knock and timing is 34 from 3000 upwards.
I think something is not right in the ECU config.

 

[SeanDezart]

Same as me then. I've got no knock and timing is 34 from 3000 upwards.
I think something is not right in the ECU config.

You mean a faulty Emerald K6 or the techniciens' programming of it ?

 

[zbloke]

He tried it up to 26° at which point it pinked so set it more 'confortably' at 22.

It'd be good if you could establish if the above is base timing plus 26° or a total max timing of 26°

As we all know, the two are very different

 

[SeanDezart]

Max timing 26°

He even asked me if I was running on on Unleaded 95 !

 

[zbloke]

Max timing 26°

Sacrebleu!

As you've mentioned, there are several areas for you to examine/adjust/modify/improve in your search for more power from your engine so I'm sure with all those optimised you'll get the results you want

 

[SeanDezart]

Yeah, but still a PITA - I was expecting to plug and play.

 

[jonbills]

You mean a faulty Emerald K6 or the techniciens' programming of it ?

The latter. specifically the crank trigger angle config.

 

[johnymd]

That timing is going to put a lot of heat into the manifold. Inlet air temp will make a big difference to the power. Check your cam lobs - you know my isky cam died after 200miles.

With regard to ecu tuning. Set you aft targets, run closed loop lamda to get near those targets. Use knock control to get your timing up. Use egt to get the sweet spot of what the engine likes and all cylinders equal. Not sure if the emerald is fast enough to do the above but should still be tuneable. Use a rolling road that very familiar with your ecu so they can get the most out of it. The emerald is a very simple ecu so should be pretty easy to tune. If you still can’t get the timing number to look right without pinking and the ecu numbers match timing light numbers then you need to start looking at the engine fundermentaks.

 

[Alphabettispaghetti]

The latter. specifically the crank trigger angle config.

I can't see it being as smooth with electronic issues like that?(not seen the A/F though).