ECU Expedition

[T3rra]

What did u replace the afm with?

 

[T3rra]

Be nice to know what rpm you make 1st In 5th with a cone filter I was getting it at 2800. So could be cone filter or tom tuning and ecu making the turbo spool faster

 

[George Elliott]

What did u replace the afm with?

T3rra, I didn't its still there. All that Barn Door guff, I don't believe it, the engine cannot detect such a minor spring loading on the flap. (who really thinks it would affect engine braking?) Of course its not planned to be there permanently and we were thinking about a Cone in a cold location, but I honestly can't say how it will end up exactly.

There are a number of developments to follow. The ECU is really the foundation.

George
944t

 

[T3rra]

So you got air box and factory cold air feed. You can monitor intake temps, I have intake temps for cone filter be good to comper them against each other, however I do have enlarged end tank on ic.

Did you notice increase in spool time from just ecu?
Be good to see the advantages cone filter can offer with the ability to data log

 

[R/E 951]

Hi t3rra,
I am the younger part of the team on this project.
You asked about the barn door, the barn door was in for a while however it has now been replaced by toms delete pipe.

I have researched air filter restriction and found that a psi of air filter restriction will only equal 2=3hp at our level of tune.
I think for the power the car is currently running the standard filter is sufficient however I'd be keen to compare logs if you have any.
I can also say that the barn door hasn't made any difference to the boost threshold but that I have noticed the boost threshold is lower running the new ECU
This I believe is the ignition timing and also maybe toms faster smarter processor at work.

What sort of intake temps are you seeing with your new turbo?
How much lower than the K26/8 are they?

Robert

 

[T3rra]

Well hello there, When I had 26/8 and toms ecu and map I would see 1 bar at 2.8 I 5th and 3k in 4th
1.3 bar at 3 k in 5th and 3.2 in 4th

I think 0.8 bar factory level was 2600 in 5th so quicker then a stock 26/6

Intake temps wise Iv not done much data logging yet till I get new map sensor and retune

But temps recover faster after a hard pull.

On the 26/8 things started heating up quickly after 5k

12deg before boost would be 26 degrees at end off one gears pull but that's running 1.3 bar

My ic pipes where more direct but at the length they are I don't think it will make a would measure able difference

Terry

 

[TTM]

Boost vs rpm is irrelevant when the VE on the standard hardware is so low.

 

[T3rra]

Are you saying that boost earlier will not result in power increase lower in the revs or under the original power curve? As the engine would all ready be at it max ve

 

[TTM]

Trying to force the turbo to build boost earlier will increase VE, but doing so without increasing camshaft overlap (thus VE) will not give the turbo the room it needs to flow as much as it can at any rpm under full load, in particular at peak torque rpm, which is where VE reaches it peak, without hitting the ignition knock threshold that remains pretty low with the standard intake and camshaft.

In general the quest for increased torque on a given rpm band disappears when VE is generously bumped up, as an engine revving "really fast" doesn't leave you the time to think you don't have enough torque anywhere below the red line.

 

[T3rra]

I don't think the turbo was intentally forced, the earlier spool is the result, I'm trying to establish if that's due to ecu or cone filter change

How do u feel about the fact the gtx is spooling faster then a stock turbo and matching my cone filter set up?

 

[TTM]

A cone filter over the air box will help with spool pretty much regardless of the turbo.